Global Mixed-mode Technology Inc.
PARAMETER
Input Characteristics
Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Output Characteristics
Output Voltage High
Output Voltage Low
Output Current
Power Supply
Power Supply Rejection Ratio
Supply Current/Amplifier
Dynamic Performance
Slew Rate
Full-Power Bandwidth
V
OH
V
OL
I
OUT
PSRR
I
SY
SR
BW
p
I
L
= 10mA
I
L
= 10mA
4.90
---
---
50
---
---
---
V
OS
I
B
I
OS
V
CM
CMRR
A
VO
V
CM
= 0V to 5V
R
L
= 2kΩ
V
O
= 0.5V to 4.5V
---
---
---
0
40
70
G1201
MIN
TYP
5
50
25
---
65
90
Electrical Characteristics
(V
S
= +5.0V, V
CM
= 2.5V, T
A
=+25°C unless otherwise noted)
SYMBOL
CONDITIONS
MAX
15
500
250
5
---
---
UNIT
mV
pA
pA
V
dB
dB
4.94
50
±100
66
3.5
6.2
30
---
100
---
---
6
---
---
V
mV
mA
dB
mA
V/μs
kHz
f
i
= 1kHz
V
ripple(PEAK)
= 1V
V
O
= 0V
R
L
= 2kΩ
R
L
= 32Ω
V
O(P-P)
= 4.2V
THD = 50dB
To 0.1%
f = 1kHz, R
L
= 32Ω
f = 1kHz, A
V
= -1 R
L
= 32Ω, V
O(P-P)
= 4.3V
Settling Time
Gain Bandwidth Product
Channel Separation
Total Harmonic Distortion
t
s
GBP
CS
THD
---
---
---
---
1.3
3.5
70
50
---
---
---
---
μs
MHz
dB
dB
Note: Specifications subject to change without notice.
Caution
ESD (electrostatic discharge) sensitive device. Elec-
trostatic charges as high as 2000V readily accumulate
on the human body and test equipment and can dis-
charge without detection.
Although the G1201 feature proprietary ESD protec-
tion circuitry, permanent damage may occur on de-
vices subjected to high-energy electrostatic discharges.
Therefore, proper ESD precautions are recommended
to avoid performance degradation or loss of functionality.
any internal short-circuit protection circuitry. Direct
connection of the G1201’s output to the positive sup-
ply in single-supply applications will destroy the device.
In those applications where some protection is needed,
but not at the expense of reduced output voltage
headroom, a low value resistor in series with the out-
put, as shown in Figure 1, can be used. The resistor,
connected within the feedback loop of the amplifier,
will have very little effect on the performance of the
amplifier other than limiting the maximum available
output voltage swing.
Applications
Theory of Operation
The G1201 is an all-CMOS, high output current drive,
rail-to-rail input/output operational amplifier. Its high
output current drive and stability with heavy capacitive
loads makes the G1201 an excellent choice as a drive
amplifier.
Short-Circuit Protection
As a result of the design of the output stage for maxi-
mum load current capability, the G1201 does not have
Figure 1. Output Short-Circuit Protection
+5V
V
IN
+
_
R
X
20Ω
V
OUT
Ver 1.2
Jul 24, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
3
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
