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  • EL2250CSZ-T13图
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产品型号EL2250CSZ的概述

芯片EL2250CSZ的概述 EL2250CSZ是一款高性能的视频放大器,组件通常用于各种视频处理和传输应用中。凭借其出色的带宽和低失真特性,EL2250CSZ被广泛应用于视频显示、视频监控及信号处理等多种电子设备中。该芯片通过简单的外部电路配置,可以实现多种功能,如增益调节和信号匹配。 芯片EL2250CSZ的详细参数 EL2250CSZ的技术规格包括: 1. 增益:可选的增益范围通通常在2至10倍之间,具体根据外部电阻的配置而定。 2. 带宽:芯片的-3dB带宽可达到100MHz,适合处理高频信号。 3. 失真:在使用过程中,特别是在高频率输出时,EL2250CSZ表现出了非常低的总谐波失真(THD),最佳情况下可低至0.05%。 4. 电源电压:该芯片可在双电源模式下工作,电压范围为±5V至±15V,具有较好的灵活性。 5. 工作温度:工作温度范围为-40°C到+85°C,适合在...

产品型号EL2250CSZ的Datasheet PDF文件预览

EL2250, EL2450  
®
Data Sheet  
June 7, 2005  
FN7061.2  
125MHz Single Supply Dual/Quad Op  
Amps  
Features  
• Specified for +3V, +5V, or ±5V applications  
The EL2250/EL2450 are part of a family of the electronics  
industries fastest single supply op amps available. Prior  
single supply op amps have generally been limited to  
bandwidths and slew rates to that of the EL2250/EL2450.  
The 125MHz bandwidth, 275V/µs slew rate, and  
• Large input common mode range  
0V < V  
CM  
< V -1.2V  
S
• Output swings to ground without saturating  
• -3dB bandwidth = 125MHz  
0.05%/0.05° differential gain/differential phase makes this  
part ideal for single or dual supply video speed applications.  
With its voltage feedback architecture, this amplifier can  
accept reactive feedback networks, allowing them to be  
used in analog filtering applications. The inputs can sense  
signals below the bottom supply rail and as high as 1.2V  
below the top rail. Connecting the load resistor to ground  
and operating from a single supply, the outputs swing  
completely to ground without saturating. The outputs can  
also drive to within 1.2V of the top rail. The EL2250/EL2450  
will output ±100mA and will operate with single supply  
voltages as low as 2.7V, making them ideal for portable, low  
power applications.  
• ±0.1dB bandwidth = 30MHz  
• Low supply current = 5mA (per amplifier)  
• Slew rate = 275V/µs  
• Low offset voltage = 4mV max  
• Output current = ±100mA  
• High open loop gain = 80dB  
• Differential gain = 0.05%  
• Differential phase = 0.05°  
• Pb-free plus anneal available (RoHS compliant)  
The EL2250/EL2450 are available in PDIP and SO  
packages in industry standard pin outs. Both parts operate  
over the industrial temperature range of -40°C to +85°C, and  
are part of a family of single supply op amps. For single  
amplifier applications, see the EL2150/EL2157. For dual and  
triple amplifiers with power down and output voltage clamps,  
see the EL2257/EL2357.  
Applications  
• Video amplifiers  
• PCMCIA applications  
• A/D drivers  
• Line drivers  
• Portable computers  
• High speed communications  
• RGB printers, FAX, scanners  
• Broadcast equipment  
• Active filtering  
Ordering Information  
TAPE &  
PART NUMBER  
EL2250CN  
EL2250CS  
EL2250CS-T7  
EL2250CS-T13  
PACKAGE  
8-Pin PDIP  
8-Pin SO  
8-Pin SO  
8-Pin SO  
REEL  
PKG. DWG. #  
MDP0031  
MDP0027  
MDP0027  
MDP0027  
MDP0027  
-
-
7”  
13”  
-
EL2250CSZ  
(See Note)  
8-Pin SO  
(Pb-free)  
EL2250CSZ-T7  
(See Note)  
EL2250CSZ-T13  
(See Note)  
8-Pin SO  
(Pb-free)  
8-Pin SO  
(Pb-free)  
7”  
MDP0027  
MDP0027  
13”  
EL2450CN  
EL2450CS  
EL2450CS-T7  
EL2450CS-T13  
14-Pin PDIP  
14-Pin SO  
14-Pin SO  
14-Pin SO  
-
-
MDP0031  
MDP0027  
MDP0027  
MDP0027  
7”  
13”  
NOTE: Intersil Pb-free plus anneal products employ special Pb-free  
material sets; molding compounds/die attach materials and 100%  
matte tin plate termination finish, which are RoHS compliant and  
compatible with both SnPb and Pb-free soldering operations. Intersil  
Pb-free products are MSL classified at Pb-free peak reflow  
temperatures that meet or exceed the Pb-free requirements of  
IPC/JEDEC J STD-020.  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright © Intersil Americas Inc. 2002-2005. All Rights Reserved.  
All other trademarks mentioned are the property of their respective owners.  
EL2250, EL2450  
Pinouts  
EL2250C  
(8-PIN SO, PDIP)  
TOP VIEW  
EL2450  
(14-PIN SO, PDIP)  
TOP VIEW  
OUTA  
INA-  
VS+  
1
14  
13  
12  
11  
10  
9
1
2
3
4
8
OUTA  
INA-  
OUTD  
IND-  
-
+
OUTB  
INB-  
2
3
4
5
6
7
7
6
5
A
D
A
-
-
+
+
-
-
INA+  
GND  
INA+  
VS+  
IND+  
GND  
INC+  
INC-  
-
+
B
INB+  
INB+  
INB-  
+
+
B
C
8
OUTB  
OUTC  
FN7061.2  
2
June 7, 2005  
EL2250, EL2450  
Absolute Maximum Ratings (T = 25°C)  
A
Supply Voltage between V and GND. . . . . . . . . . . . . . . . . . +12.6V  
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves  
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C  
Ambient Operating Temperature Range . . . . . . . . . .-40°C to +85°C  
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150°C  
S
Input Voltage (IN+, IN-) . . . . . . . . . . . . . . . . . . . GND-0.3V,V +0.3V  
S
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±6V  
Maximum Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90mA  
Output Short Circuit Duration. . . . . . . . . . . . . . . . . . . . . . . . (Note 1)  
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the  
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.  
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests  
are at the specified temperature and are pulsed tests, therefore: T = T = T  
A
J
C
DC Electrical Specifications  
V
= +5V, GND = 0V, T = 25°C, V  
= 1.5V, V = 1.5V, unless otherwise specified.  
OUT  
S
A
CM  
TEST CONDITIONS  
PARAMETER  
DESCRIPTION  
MIN  
-2  
TYP  
MAX  
UNIT  
mV  
mV  
µV/°C  
µA  
V
Offset Voltage  
EL2250  
EL2450  
2
4
OS  
-4  
TCV  
IB  
Offset Voltage Temperature Coefficient  
Input Bias Current  
Measured from T  
to T  
to T  
10  
-5.5  
150  
50  
OS  
MIN  
MAX  
MAX  
V
V
= 0V  
= 0V  
-10  
IN  
IN  
I
Input Offset Current  
-750  
750  
nA  
OS  
TCI  
Input Bias Current Temperature Coefficient Measured from T  
nA/°C  
dB  
OS  
MIN  
PSRR  
CMRR  
Power Supply Rejection Ratio  
Common Mode Rejection Ratio  
V
= +2.7V to +12V  
55  
55  
55  
0
70  
S
VCM = 0V to +3.8V  
VCM = 0V to +3.0V  
65  
dB  
70  
dB  
CMIR  
Common Mode Input Range  
Input Resistance  
V -1.2  
V
S
R
Common Mode  
SO Package  
1
2
1
M  
pF  
IN  
C
Input Capacitance  
IN  
PDIP Package  
1.5  
40  
5
pF  
R
Output Resistance  
A
V
= +1  
mΩ  
mA  
V
OUT  
V
S
I
Supply Current (per amplifier)  
Power Supply Operating Range  
= +12V  
6.5  
S
PSOR  
2.7  
12.0  
DC Electrical Specifications  
V
= +5V, GND = 0V, T = 25°C, V  
= +1.5V, V  
= +1.5V, unless otherwise specified.  
OUT  
S
A
CM  
PARAMETER  
DESCRIPTION  
Open Loop Gain  
TEST CONDITIONS  
MIN  
TYP  
80  
MAX  
UNIT  
dB  
dB  
dB  
V
AVOL  
V
V
V
V
V
V
V
V
V
V
V
V
V
= +12V, V  
= +2V to +9V, R = 1kto GND  
60  
S
OUT  
L
= +1.5V to +3.5V, R = 1kto GND  
70  
OUT  
OUT  
L
= +1.5V to +3.5V, R = 150to GND  
60  
L
V
Positive Output  
Voltage Swing  
= +12V, A = +1, R = 1kto 0V  
10.8  
10.0  
4.0  
OP  
S
S
S
S
S
S
V
L
= +12V, A = +1, R = 150to 0V  
9.6  
V
V
L
= ±5V, A = +1, R = 1kto 0V  
V
V
L
= ±5V, A = +1, R = 150to 0V  
3.4  
1.8  
3.8  
V
V
L
= +3V, A = +1, R = 150to 0V  
1.95  
5.5  
V
V
L
V
Negative Output  
Voltage Swing  
= +12V, A = +1, R = 150to 0V  
8
mV  
V
ON  
V
L
= ±5V, A = +1, R = 1kto 0V  
-4.0  
-3.7  
±100  
S
V
L
= ±5V, A = +1, R = 150to 0V  
-3.4  
V
S
S
S
V
L
I
Output Current (Note 1)  
= ±5V, A = +1, R = 10to 0V  
±75  
mA  
OUT  
V
L
= ±5V, A = +1, R = 50to 0V±60VmA  
V
L
NOTE:  
1. Internal short circuit protection circuitry has been built into the EL2250/EL2450; see the Applications section  
FN7061.2  
3
June 7, 2005  
EL2250, EL2450  
AC Electrical Specifications  
V
= +5V, GND = 0V, T = 25°C, V  
CM  
= +1.5V, V  
= +1.5V, A = +1, R = 0, R = 150to GND pin,  
OUT V F L  
S
A
unless otherwise specified. (Note 1)  
TEST CONDITIONS  
PARAMETER  
DESCRIPTION  
MIN  
TYP  
125  
60  
MAX  
UNIT  
MHz  
MHz  
MHz  
MHz  
MHz  
MHz  
MHz  
MHz  
MHz  
MHz  
°
BW  
-3dB Bandwidth  
OUT  
V
V
V
V
V
V
V
V
V
V
= +5V, A = +1, R = 0Ω  
S
S
S
S
S
S
S
S
S
S
V
F
(V =400mV  
)
P-P  
= +5V, A = -1, R = 500Ω  
V
F
= +5V, A = +2, R = 500Ω  
60  
V
F
= +5V, A = +10, R = 500Ω  
6
V
F
= +12V, A = +1, R = 0Ω  
150  
100  
25  
V
F
= +3V, A = +1, R = 0Ω  
V
F
BW  
±0.1dB Bandwidth  
(V =400mV  
= +12V, A = +1, R = 0Ω  
V F  
)
OUT  
P-P  
= +5V, A = +1, R = 0Ω  
30  
V
F
= +3V, A = +1, R = 0Ω  
20  
V
F
GBWP  
PM  
Gain Bandwidth Product  
Phase Margin  
= +12V, @ A = +10  
60  
V
R = 1k, C = 6pF  
55  
L
S
S
L
SR  
Slew Rate  
V
V
= +10V, R = 150, V  
= 0V to +6V  
200  
275  
300  
2.8  
10  
V/µs  
V/µs  
ns  
L
OUT  
= 0V to +3V  
OUT  
= +5V, R = 150, V  
L
t , t  
Rise Time, Fall Time  
Overshoot  
±0.1V Step  
±0.1V Step  
±0.1V Step  
R
F
OS  
%
t
Propagation Delay  
0.1% Settling Time  
0.01% Settling Time  
Differential Gain (Note 2)  
Differential Phase (Note 2)  
Input Noise Voltage  
Input Noise Current  
3.2  
40  
ns  
PD  
t
V
V
A
A
= ±5V, R = 500, A = +1, V  
= ±3V  
= ±3V  
ns  
S
S
S
V
V
L
V
OUT  
OUT  
= ±5V, R = 500, A = +1, V  
75  
ns  
L
V
dG  
dP  
= +2, R = 1kΩ  
0.05  
0.05  
48  
%
F
= +2, R = 1kΩ  
°
F
e
f = 10kHz  
f = 10kHz  
nV/Hz  
pA/Hz  
N
i
1.25  
N
NOTES:  
1. All AC tests are performed on a “warmed up” part, except slew rate, which is pulse tested  
2. Standard NTSC signal = 286mV , f = 3.58MHz, as V is swept from 0.6V to 1.314V; R is DC coupled  
P-P IN  
L
FN7061.2  
4
June 7, 2005  
EL2250, EL2450  
Typical Performance Curves  
Non-Inverting Frequency  
Response (Gain)  
Non-Inverting Frequency  
Response (Phase)  
3dB Bandwidth vs Temperature for  
Non-Inverting Gains  
Inverting Frequency Response  
(Gain)  
Inverting Frequency Response  
(Phase)  
3dB Bandwidth vs Temperature for  
Inverting Gains  
Non-Inverting Frequency  
Response vs Common Mode  
Voltage  
Frequency Response for Various R  
Frequency Response for Various C  
L
L
FN7061.2  
5
June 7, 2005  
EL2250, EL2450  
Typical Performance Curves (Continued)  
3dB Bandwidth vs Supply Voltage  
for Non-Inverting Gains  
Frequency Response for Various  
PSSR and CMRR vs Frequency  
Supply Voltages, A = + 1  
V
3dB Bandwidth vs Supply Voltage  
for Inverting Gains  
Frequency Response for Various  
PSRR and CMRR vs Die  
Temperature  
Supply Voltages, A = + 2  
V
Open Loop Gain and Phase vs  
Frequency  
Open Loop Voltage Gain vs Die  
Temperature  
Closed Loop Output Impedance vs  
Frequency  
FN7061.2  
6
June 7, 2005  
EL2250, EL2450  
Typical Performance Curves (Continued)  
Large Signal Step Response, V = +3V  
Large Signal Step Response, V = +5V  
S
Large Signal Step Response, V = +12V  
S
S
Small Signal Step Response  
Large Signal Step Response, V = ±5V  
S
Slew Rate vs Temperature  
Settling Time vs Settling Accuracy  
Voltage and Current Noise vs  
Frequency  
FN7061.2  
7
June 7, 2005  
EL2250, EL2450  
Typical Performance Curves (Continued)  
Differential Gain for  
Single Supply Operation  
Differential Phase for  
Single Supply Operation  
Differential Gain and Phase  
for Dual Supply Operation  
2nd and 3rd Harmonic Distortion  
vs Frequency  
2nd and 3rd Harmonic Distortion  
vs Frequency  
2nd and 3rd Harmonic Distortion  
vs Frequency  
Output Voltage Swing vs  
Frequency for THD < 0.1%  
Output Voltage Swing vs  
Frequency for Unlimited Distortion  
Output Current vs Die  
Temperature  
FN7061.2  
8
June 7, 2005  
EL2250, EL2450  
Typical Performance Curves (Continued)  
Supply Current vs Supply Voltage  
(per amplifier)  
Input Resistance vs Die  
Temperature  
Supply Current vs Die  
Temperature (per amplifier)  
Input Offset Current and Input Bias  
Current vs Die Temperature  
Offset Voltage vs Die Temperature  
(4 Samples)  
Input Bias Current vs Input  
Voltage  
Positive Output Voltage Swing vs  
Negative Output Voltage Swing vs  
Channel to Channel Isolation vs  
Frequency  
Die Temperature, R = 150to  
Die Temperature, R = 150to  
L
L
GND  
GND  
Package Power Dissipation vs Ambient Temp.  
JEDEC JESD51-3 Low Effective Thermal Conductivity  
Test Board  
Package Power Dissipation vs Ambient Temp.  
SEMI G42-88 Single Layer Test Board  
1.8  
1.2  
1
1.042W  
1.54W  
1.25W  
1.6  
1.4  
1.2  
1
781W  
0.8  
0.6  
0.4  
0.2  
0
0.8  
0.6  
0.4  
0.2  
0
0
25  
50  
75 85 100  
125  
150  
0
25  
50  
75 85 100  
125  
150  
Ambient Temperature (°C)  
Ambient Temperature (°C)  
FN7061.2  
9
June 7, 2005  
EL2250, EL2450  
Simplified Schematic  
used. Carbon or Metal-Film resistors are acceptable with the  
Applications Information  
Product Description  
Metal-Film resistors giving slightly less peaking and  
bandwidth because of their additional series inductance. Use  
of sockets, particularly for the SO package should be  
avoided if possible. Sockets add parasitic inductance and  
capacitance which will result in some additional peaking and  
overshoot.  
The EL2250/EL2450 are part of a family of the industries  
fastest single supply operational amplifiers. Connected in  
voltage follower mode, their -3dB bandwidth is 125MHz  
while maintaining a 275V/µs slew rate. With an input and  
output common mode range that includes ground, these  
amplifiers were optimized for single supply operation, but will  
also accept dual supplies. They operate on a total supply  
voltage range as low as +2.7V or up to +12V. This makes  
them ideal for +3V applications, especially portable  
computers.  
Supply Voltage Range and Single-Supply  
Operation  
The EL2250/EL2450 have been designed to operate with  
supply voltages having a span of greater than 2.7V, and less  
than 12V. In practical terms, this means that the  
EL2250/EL2450 will operate on dual supplies ranging from  
±1.35V to ±6V. With a single-supply, the EL2250/EL2450 will  
operate from +2.7V to +12V. Performance has been  
optimized for a single +5V supply.  
While many amplifiers claim to operate on a single supply,  
and some can sense ground at their inputs, most fail to truly  
drive their outputs to ground. If they do succeed in driving to  
ground, the amplifier often saturates, causing distortion and  
recovery delays. However, special circuitry built into the  
EL2250/EL2450 allows the output to follow the input signal  
to ground without recovery delays.  
Pins 8 and 4 are the power supply pins on the EL2250. The  
positive power supply is connected to pin 8. When used in  
single supply mode, pin 4 is connected to ground. When  
used in dual supply mode, the negative power supply is  
connected to pin 4.  
Power Supply Bypassing And Printed Circuit  
Board Layout  
Pins 4 and 11 are the power supply pins on the EL2450. The  
positive power supply is connected to pin 4. When used in  
single supply mode, pin 11 is connected to ground. When  
used in dual supply mode, the negative power supply is  
connected to pin 11.  
As with any high-frequency device, good printed circuit  
board layout is necessary for optimum performance. Ground  
plane construction is highly recommended. Lead lengths  
should be as short as possible. The power supply pins must  
be well bypassed to reduce the risk of oscillation. The  
combination of a 4.7µF tantalum capacitor in parallel with a  
0.1µF ceramic capacitor has been shown to work well when  
placed at each supply pin. For single supply operation,  
where the GND pin is connected to the ground plane, a  
single 4.7µF tantalum capacitor in parallel with a 0.1µF  
As supply voltages continue to decrease, it becomes  
necessary to provide input and output voltage ranges that  
can get as close as possible to the supply voltages. The  
EL2250/EL2450 have an input voltage range that includes  
the negative supply and extends to within 1.2V of the  
positive supply. So, for example, on a single +5V supply, the  
EL2250/EL2450 have an input range which spans from 0V to  
3.8V.  
ceramic capacitor across the V + and GND pins will suffice.  
S
For good AC performance, parasitic capacitance should be  
kept to a minimum. Ground plane construction should be  
FN7061.2  
10  
June 7, 2005  
EL2250, EL2450  
The output range of the EL2250/EL2450 is also quite large.  
value. While driving a light load, such as 1k, if the input  
black level is kept above 1.25V, dG and dP are a respectable  
0.03% and 0.03°.  
It includes the negative rail, and extends to within 1V of the  
top supply rail with a 1kload. On a +5V supply, the output  
is therefore capable of swinging from 0V to +4V. On split  
supplies, the output will swing ±4V. If the load resistor is tied  
to the negative rail and split supplies are used, the output  
range is extended to the negative rail.  
For other biasing conditions see the Differential Gain and  
Differential Phase vs. Input Voltage curves.  
Output Drive Capability  
In spite of their moderately low 5mA of supply current, the  
EL2250/EL2450 are capable of providing ±100mA of output  
current into a 10load, or ±60mA into 50. With this large  
output current capability, a 50load can be driven to ±3V  
Choice Of Feedback Resistor, R  
F
The feedback resistor forms a pole with the input  
capacitance. As this pole becomes larger, phase margin is  
reduced. This increases ringing in the time domain and  
with V = ±5V, making it an excellent choice for driving  
S
peaking in the frequency domain. Therefore, R has some  
F
isolation transformers in telecommunications applications.  
maximum value which should not be exceeded for optimum  
performance. If a large value of R must be used, a small  
Driving Cables and Capacitive Loads  
F
capacitor in the few picofarad range in parallel with R can  
F
When used as a cable driver, double termination is always  
recommended for reflection-free performance. For those  
applications, the back-termination series resistor will de-  
couple the EL2250/EL2450 from the cable and allow  
extensive capacitive drive. However, other applications may  
have high capacitive loads without a back-termination  
resistor. In these applications, a small series resistor (usually  
between 5and 50) can be placed in series with the  
help to reduce this ringing and peaking at the expense of  
reducing the bandwidth.  
As far as the output stage of the amplifier is concerned,  
R + R appear in parallel with R for gains other than +1.  
F
G
L
As this combination gets smaller, the bandwidth falls off.  
Consequently, R has a minimum value that should not be  
F
exceeded for optimum performance.  
output to eliminate most peaking. The gain resistor (R ) can  
G
For A = +1, R = 0is optimum. For A = -1 or +2 (noise  
V
F
V
then be chosen to make up for any gain loss which may be  
created by this additional resistor at the output.  
gain of 2), optimum response is obtained with R between  
F
500and 1k. For Av = -4 or +5 (noise gain of 5), keep R  
between 2kand 10k.  
F
Video Sync Pulse Remover Application  
All CMOS Analog to Digital Converters (A/Ds) have a  
parasitic latch-up problem when subjected to negative input  
voltage levels. Since the sync tip contains no useful video  
information and it is a negative going pulse, we can chop it  
off.  
Video Performance  
For good video performance, an amplifier is required to  
maintain the same output impedance and the same  
frequency response as DC levels are changed at the output.  
This can be difficult when driving a standard video load of  
150, because of the change in output current with DC level.  
Differential Gain and Differential Phase for the  
Figure 1 shows a unity gain connected amplifier A of an  
EL2250. Figure 2 shows the complete input video signal  
applied at the input, as well as the output signal with the  
negative going sync pulse removed.  
EL2250/EL2450 are specified with the black level of the  
output video signal set to +1.2V. This allows ample room for  
the sync pulse even in a gain of +2 configuration. This  
results in dG and dP specifications of 0.05% and 0.05° while  
driving 150at a gain of +2. Setting the black level to other  
values, although acceptable, will compromise peak  
performance. For example, looking at the single supply dG  
and dP curves for R =150, if the output black level clamp is  
L
reduced from 1.2V to 0.6V dG/dP will increase from  
0.05%/0.05° to 0.08%/0.25° Note that in a gain of +2  
configuration, this is the lowest black level allowed such that  
the sync tip doesn’t go below 0V.  
If your application requires that the output goes to ground,  
then the output stage of the EL2250/EL2450, like all other  
single supply op amps, requires an external pull down  
resistor tied to ground. As mentioned above, the current  
flowing through this resistor becomes the DC bias current for  
the output stage NPN transistor. As this current approaches  
zero, the NPN turns off, and dG and dP will increase. This  
becomes more critical as the load resistor is increased in  
FIGURE 1.  
FN7061.2  
11  
June 7, 2005  
EL2250, EL2450  
The maximum power dissipation allowed in a package is  
determined according to [1]:  
T
T  
JMAX  
AMAX  
--------------------------------------------  
PD  
=
MAX  
θ
JA  
FIGURE 2.  
where:  
T
= Maximum Junction Temperature  
= Maximum Ambient Temperature  
JMAX  
Short Circuit Current Limit  
T
AMAX  
The EL2250/EL2450 have internal short circuit protection  
circuitry that protect it in the event of its output being shorted  
to either supply rail. This limit is set to around 100mA  
nominally and reduces with increasing junction temperature.  
It is intended to handle temporary shorts. If an output is  
shorted indefinitely, the power dissipation could easily  
increase such that the part will be destroyed. Maximum  
reliability is maintained if the output current never exceeds  
±90mA. A heat sink may be required to keep the junction  
temperature below absolute maximum when an output is  
shorted indefinitely.  
θ
= Thermal Resistance of the Package  
JA  
PD  
= Maximum Power Dissipation in the Package.  
MAX  
The maximum power dissipation actually produced by an IC  
is the total quiescent supply current times the total power  
supply voltage, plus the power in the IC due to the load, or  
[2]:  
V
OUT  
---------------  
PD  
= N × V × I  
+ (V V  
OUT  
) ×  
MAX  
s
SMAX  
S
R
L
where:  
Power Dissipation  
With the high output drive capability of the EL2250/EL2450,  
it is possible to exceed the 150°C Absolute Maximum  
junction temperature under certain load current conditions.  
Therefore, it is important to calculate the maximum junction  
temperature for the application to determine if power-supply  
voltages, load conditions, or package type need to be  
modified for the EL2250/EL2450 to remain in the safe  
operating area.  
N = Number of amplifiers  
V = Total Supply Voltage  
S
I
= Maximum Supply Current per amplifier  
SMAX  
V
= Maximum Output Voltage of the Application  
OUT  
R = Load Resistance tied to Ground  
L
If we set the two PD  
MAX  
equations, [1] & [2], equal to each  
other, and solve for V , we can get a family of curves for  
S
various loads and output voltages according to [3]:  
R
× (T  
T  
AMAX  
)
L
JMAX  
---------------------------------------------------------------  
+ (V  
)
OUT  
N × θ  
JA  
------------------------------------------------------------------------------------------  
V
=
S
(IS × R ) + V  
L
OUT  
Figures 3 through 6 below show total single supply voltage  
V vs. R for various output voltage swings for the PDIP and  
S
L
SO packages. The curves assume WORST CASE  
conditions of T = +85°C and I = 6.5mA per amplifier.  
A
S
FN7061.2  
12  
June 7, 2005  
EL2250, EL2450  
EL2450 Single Supply Voltage vs  
for Various V (PDIP  
EL2250 Single Supply Voltage vs  
for Various V (PDIP  
R
LOAD  
Package)  
OUT  
R
LOAD  
Package)  
OUT  
FIGURE 3.  
FIGURE 5.  
EL2450 Single Supply Voltage vs  
for Various V (SO  
EL2250 Single Supply Voltage vs  
for Various V (SO  
R
LOAD  
Package)  
OUT  
R
LOAD  
Package)  
OUT  
FIGURE 4.  
FIGURE 6.  
FN7061.2  
13  
June 7, 2005  
EL2250, EL2450  
EL2250/EL2450 Macromodel (one amplifier)  
* Revision A, April 1996  
* Pin numbers reflect a standard single op amp.  
* Connections:  
+input  
*
*
*
*
|
|
|
|
-input  
|
|
+Vsupply  
|
|
-Vsupply  
|
|
output  
.subckt EL2250/el 3  
*
2
7
4
6
* Input Stage  
*
i1 7 10 250µA  
i2 7 11 250µA  
r1 10 11 4k  
q1 12 2 10 qp  
q2 13 3 11 qpa  
r2 12 4 100  
r3 13 4 100  
*
* Second Stage & Compensation  
*
gm 15 4 13 12 4.6m  
r4 15 4 15Meg  
c1 15 4 0.36pF  
*
* Poles  
*
e1 17 4 15 4 1.0  
r6 17 25 400  
c3 25 4 1pF  
r7 25 18 500  
c4 18 4 1pF  
*
* Output Stage  
*
i3 20 4 1.0mA  
q3 7 23 20 qn  
q4 7 18 19 qn  
q5 7 18 21 qn  
q6 4 20 22 qp  
q7 7 23 18 qn  
d1 19 20 da  
r8 21 6 2  
r9 22 6 2  
r10 18 21 10k  
r11 7 23 100k  
d2 23 24 da  
d3 24 4 da  
d4 23 18 da  
*
* Power Supply Current  
*
ips 7 4 3.2mA  
*
* Models  
*
.model qn npn(is=800e-18 bf=150 tf=0.02nS)  
.model qpa pnp(is=810e-18 bf=50 tf=0.02nS)  
.model qp pnp(is=800e-18 bf=54 tf=0.02nS)  
.model da d(tt=0nS)  
.ends  
FN7061.2  
14  
June 7, 2005  
EL2250, EL2450  
EL2250/EL2450 Macromodel (one amplifier)  
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.  
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality  
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without  
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and  
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result  
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.  
For information regarding Intersil Corporation and its products, see www.intersil.com  
FN7061.2  
15  
June 7, 2005  
配单直通车
EL2250CSZ产品参数
型号:EL2250CSZ
Brand Name:Intersil
是否Rohs认证: 符合
生命周期:Obsolete
IHS 制造商:INTERSIL CORP
零件包装代码:SOIC
包装说明:SOP-8
针数:8
Reach Compliance Code:compliant
ECCN代码:EAR99
HTS代码:8542.33.00.01
Factory Lead Time:1 week
风险等级:5.73
Is Samacsys:N
放大器类型:OPERATIONAL AMPLIFIER
JESD-30 代码:R-PDSO-G8
JESD-609代码:e3
长度:4.89 mm
湿度敏感等级:3
功能数量:2
端子数量:8
封装主体材料:PLASTIC/EPOXY
封装代码:SOP
封装形状:RECTANGULAR
封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):260
认证状态:Not Qualified
座面最大高度:1.68 mm
子类别:Operational Amplifier
表面贴装:YES
温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn) - annealed
端子形式:GULL WING
端子节距:1.27 mm
端子位置:DUAL
处于峰值回流温度下的最长时间:40
宽度:3.9 mm
Base Number Matches:1
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