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产品型号EL2227CS的概述

芯片EL2227CS的概述 EL2227CS是一款高性能的运算放大器，主要应用于高精度信号处理领域。该芯片由Intersil公司设计并制造，以其出色的电性能和广泛的应用场景而闻名。EL2227CS具备较高的增益带宽积和低噪声特性，非常适合用于音频设备、医疗仪器、数据采集系统等多个领域。该芯片的设计宗旨在于提供高精度的信号放大，而其架构和工作原理使得EL2227CS能够在多种环境下稳定运行。此外，EL2227CS的低功耗特性也使其适合于便携式设备的使用。芯片EL2227CS的详细参数 EL2227CS具体的技术参数包括如下几点： - 增益带宽积（GBW）: 通常为20 MHz，确保在较高频率下依然能够维持理想的增益。 - 偏置电流: 输入偏置电流通常为50 nA，符合高精度测量的需求。 - 输入电阻: 较大的输入阻抗，约为1 MΩ，有效降低了信号源的负担。 - 输出电压摆幅: 具有较...

产品型号EL2227CS的Datasheet PDF文件预览

EL2227C

Dual Very Low Noise Amplifier

Features

General Description

• Voltage noise of only 1.9nV/ÖHz

• Current noise of only 1.2pA/ÖHz

• Bandwidth (-3dB) of 115MHz

@A_V= +2

The EL2227C is a dual, low-noise amplifier, ideally suited to line

receiving applications in ADSL and HDSLII designs. With low noise

specification of just 1.9nV/ÖHz and 1.2pA/ÖHz, the EL2227C is per-

fect for the detection of very low amplitude signals.

• Gain-of-2 stable

The EL2227C features a -3dB bandwidth of 115MHz and is gain-of-2

stable. The EL2227C also affords minimal power dissipation with a

supply current of just 4.8mA per amplifier. The amplifier can be pow-

ered from supplies ranging from ±2.5V to ±12V.

• Just 4.8mA per amplifier

• 8-pin MSOP package

• ±2.5V to ±12V operation

The EL2227C is available in a space-saving 8-pin MSOP package as

well as the industry-standard 8-pin SO. It can operate over the -40°C

to +85°C temperature range.

Applications

• ADSL receivers

• HDSLII receivers

• Ultrasound input amplifiers

• Wideband instrumentation

• Communications equipment

• AGC & PLL active filters

• Wideband sensors

Ordering Information

Part No.

Package

8-Pin MSOP

8-Pin SO

Tape & Reel

Outline #

MDP0043

MDP0027

EL2227CY

Connection Diagram

EL2227CY-T13

EL2227CY-T7

EL2227CS

13”

7”

EL2227CS-T13

EL2227CS-T7

8-Pin SO

13”

7”

8-Pin SO

VOUTA

VINA-

VINA+

VS-

VS+

VOUTB

VINB-

VINB+

EL2227C

(8-Pin SO and 8-Pin MSOP)

Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these

specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.

EL2227C

Dual Very Low Noise Amplifier

Absolute Maximum Ratings (T = 25°C)

Values beyond absolute maximum ratings can cause the device to be pre-

maturely damaged. Absolute maximum ratings are stress ratings only

and functional device operation is not implied

Maximum Die Temperature

Storage Temperature

Operating Temperature

Power Dissipation

150°C

-65°C to +150°C

-40°C to +85°C

See Curves

Supply Voltage between V_S+ and V_S-

Input Voltage

28V

V_S- - 0.3V, V_S+0.3V

40mA

ESD Voltage

2kV

Maximum Continuous Output Current

Important Note:

All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the

specified temperature and are pulsed tests, therefore: T_J= T_C= T_A.

Electrical Characteristics

V_S+ = +12V, V_S- = -12V, R_L= 500W and C_L= 3pF to 0V, R_F= R_G= 620W, and T_A= 25°C unless otherwise specified.

Parameter

Description

Condition

Min

Typ

Max

Unit

Input Characteristics

V_OS

TCV_OS

I_B

Input Offset Voltage

V_CM= 0V

[1]

-0.2

-0.6

-3.4

7.3

µV/°C

µA

Average Offset Voltage Drift

Input Bias Current

V_CM= 0V

-9

R_IN

Input Impedance

C_IN

Input Capacitance

1.6

CMIR

CMRR

A_VOL

e_n

Common-Mode Input Range

Common-Mode Rejection Ratio

Open-Loop Gain

-11.8

+10.4

for V_INfrom -11.8V to 10.4V

-5V £ V_OUT£ 5V

f = 100kHz

Voltage Noise

1.9

1.2

nV/ÖHz

pA/ÖHz

i_n

Current Noise

f = 100kHz

Output Characteristics

V_OL

V_OH

I_SC

Output Swing Low

R_L= 500W

R_L= 250W

R_L= 500W

R_L= 250W

R_L= 10W

-10.4

-9.8

10.4

-10

-9

Output Swing High

9.5

140

Short Circuit Current

180

Power Supply Performance

PSRR

I_S

Power Supply Rejection Ratio

V_Sis moved from ±2.25V to ±12V

No Load

±2.5

Supply Current (Per Amplifier)

Operating Range

4.8

6.5

V_S

±12

Dynamic Performance

Slew Rate^[2]

±2.5V square wave, measured 25%-75%

(A_V= +2), V_{O =}±1V

V/µS

t_S

Settling to 0.1% (A_V= +2)

-3dB Bandwidth

HD2

R_F= 358W

115

MHz

dBc

2nd Harmonic Distortion

f = 1MHz, V_O= 2V_P-P, R_L= 500W, R_F= 358W

f = 1MHz, V_O= 2V_P-P, R_L= 150W, R_F= 358W

f = 1MHz, V_O= 2V_P-P, R_L= 500W, R_F= 358W

f = 1MHz, V_O= 2V_P-P, R_L= 150W, R_F= 358W

HD3

3rd Harmonic Distortion

EL2227C

Dual Very Low Noise Amplifier

Electrical Characteristics

V_S+= +5V, V_S- = -5V, R_L= 500W and C_L= 3pF to 0V, R_F= 620W & T_A= 25°C unless otherwise specified.

Parameter

Description

Condition

Min

Typ

Max

Unit

Input Characteristics

V_OS

TCV_OS

I_B

Input Offset Voltage

V_CM= 0V

[1]

0.2

-0.6

-3.7

7.3

µV/°C

µA

Average Offset Voltage Drift

Input Bias Current

V_CM= 0V

-9

R_IN

Input Impedance

C_IN

Input Capacitance

1.6

CMIR

CMRR

A_VOL

e_n

Common-Mode Input Range

Common-Mode Rejection Ratio

Open-Loop Gain

-4.8

3.4

for V_INfrom -4.8V to 3.4V

-5V £ V_OUT£ 5V

f = 100kHz

Voltage Noise

1.9

1.2

nV/ÖHz

pA/ÖHz

i_n

Current Noise

f = 100kHz

Output Characteristics

V_OL

V_OH

I_SC

Output Swing Low

R_L= 500W

R_L= 250W

R_L= 500W

R_L= 250W

R_L= 10W

-3.8

-3.7

3.7

-3.5

Output Swing High

Short Circuit Current

3.5

3.6

100

Power Supply Performance

PSRR

I_S

Power Supply Rejection Ratio

V_Sis moved from ±2.25V to ±12V

No Load

±2.5

Supply Current (Per Amplifier)

Operating Range

4.5

5.5

V_S

±12

Dynamic Performance

Slew Rate^[2]

±2.5V square wave, measured 25%-75%

(A_V= +2), V_{O =}±1V

V/µS

t_S

Settling to 0.1% (A_V= +2)

-3dB Bandwidth

HD2

R_F= 358W

MHz

dBc

2nd Harmonic Distortion

f = 1MHz, V_O= 2V_P-P, R_L= 500W, R_F= 358W

f = 1MHz, V_O= 2V_P-P, R_L= 150W, R_F= 358W

f = 1MHz, V_O= 2V_P-P, R_L= 500W, R_F= 358W

f = 1MHz, V_O= 2V_P-P, R_L= 150W, R_F= 358W

HD3

3rd Harmonic Distortion

EL2227C

Dual Very Low Noise Amplifier

Typical Performance Curves

Non-inverting Frequency Response for Various R

Inverting Frequency Response for Various R

R =100W

R =350W

R =1kW

R =620W

-1

-2

-3

-4

-5

-6

R =100W

-1

-2

-3

-4

-5

-6

R =420W

R =350W

R =620W

R =1kW

V =±12V

A =+2

A =-1

R =500W

10M

100M 200M

10M

Frequency (Hz)

100M 200M

Frequency (Hz)

Non-inverting Frequency Response (Gain)

Inverting Frequency Response (Gain)

A =-2

A =-1

A =2

-1

-2

-3

-4

-5

-6

A =10

A =5

-1

-2

-3

-4

-5

-6

A =-10

A =-5

V =±12V

R =420W

R =500W

R =350W

R =500W

10M

Frequency (Hz)

100M 200M

10M

100M 200M

Frequency (Hz)

Non-inverting Frequency Response (Phase)

Inverting Frequency Response (Phase)

135

A =5

A =-1

A =2

-45

A =-10

A =-2

-90

A =10

A =-5

-135

-180

-225

-270

-315

-135

-180

-225

-270

-315

V =±12

V =±12V

R =350W

R =420W

R =500W

100M 200M

10M

Frequency (Hz)

100M 200M

Frequency (Hz)

EL2227C

Dual Very Low Noise Amplifier

Typical Performance Curves

Non-inverting Frequency Response for Various

Input Signal Levels

Inverting Frequency Response for Various Input

Signal Levels

V =±12V

R =350W

A =+2

=20mV

=1.4V

=2.8V

V =20mV

IN PP

R =500W

=100mV

-1

-2

-3

-4

-5

-6

-1

-2

-3

-4

-5

-6

=500mV

=280mV

=1V

=2V

V =±12V

R =420W

R =500W

A =-1

100k

10M

100M

10M

Frequency (Hz)

100M 200M

Frequency (Hz)

Non-inverting Frequency Response for Various C

Inverting Frequency Response for Various C

C =30pF

C =12pF

-1

-2

-3

-4

-5

-6

C =2pF

-1

-2

-3

-4

-5

V =±12V

R =620W

R =420W

R =500W

A =+2

A =-1

10M

Frequency (Hz)

100M 200M

10M

Frequency (Hz)

100M 200M

Non-inverting Frequency Response for Various R

Frequency Response for Various Output DC

Levels

V =+10V

R =100W

R =500W

=-10V

V =+5V

R =50W

-1

-2

-3

-4

-5

-6

-1

-2

-3

-4

-5

-6

=0V

V =-5V

V =±12V

R =620W

R =500W

C =15pF

A =+2

100M

10M

Frequency (Hz)

100M 200M

100k

10M

Frequency (Hz)

EL2227C

Dual Very Low Noise Amplifier

Typical Performance Curves

3dB Bandwidth vs Supply Voltage

Peaking vs Supply Voltage

140

3.5

A =+2

R =620W

A =+2

R =620W

120

100

A =-1

R =500W

2.5

A =+2

A =-1

A =-2

A =+10

1.5

A =-10

A =+5

A =-5

A =+10

A =-2

A =+5

A =-5

0.5

A =-10

Supply Voltage (±V)

Large Signal Step Response

V =±12V

Large Signal Step Response

V =±2.5V

R =620W

A =2

R =500W

0.5V/div

100ns/div

Small Signal Step Response

V =±12V

Small Signal Step Response

V =±2.5V

R =620W

A =2

R =500W

20mV/div

100ns/div

EL2227C

Dual Very Low Noise Amplifier

Typical Performance Curves

Group Delay vs Frequency

Differential Gain/Phase vs DC Input Voltage at

3.58MHz

0.1

0.08

0.06

0.04

0.02

A =5V

A =2V

A =2

R =620W

R =150W

-2

-4

-6

-8

-10

=3.58MHz

V =±12V

R =620W

R =500W

=-20dBm into 50W

-0.02

100M

10M

Frequency (Hz)

-1

-0.5

0.5

DC Input Voltage (V)

Supply Current vs Supply Voltage

Closed Loop Output Impedance vs Frequency

100

1.2/div

0.1

0.01

1.2/div

100M

10k

100k

10M

Supply Voltage (±V)

Frequency (Hz)

CMRR

PSRR

110

V -

V +

V =±12

100

10k

100k

10M 100M

10k

100k

10M

100M

Frequency (Hz)

EL2227C

Dual Very Low Noise Amplifier

Typical Performance Curves

1MHz 2nd and 3rd Harmonic Distortion vs Output

Swing for V =±2.5V

Swing for V =±12V

-40

-50

-60

A =2

R =620W

R =358W

R =500W

2nd H

3rd H

-60

-70

2nd H

-70

-80

3rd H

1.5

-90

-100

0.5

2.5

Output Swing (V

)

Output Swing (V )

Total Harmonic Distortion vs Frequency @ 2V

V =±2.5V

Total Harmonic Distortion vs Frequency @ 2V

V =±12V

-60

-70

-60

-70

R =50

-80

R =50

-80

-90

R =500

-100

-110

-120

-100

-110

-120

R =500

100

1000

100

1000

Frequency (kHz)

Voltage and Current Noise vs Frequency

Channel to Channel Isolation vs Frequency

-20

A ®

B ®

-40

-60

-80

-100

100k

100

10k

100k

10M

Frequency (Hz)

100M

Frequency (Hz)

EL2227C

Dual Very Low Noise Amplifier

Typical Performance Curves

-3dB Bandwidth vs Temperature

Supply Current vs Temperature

150

9.5

140

130

120

110

100

8.5

-40 -20

80 100 120 140

-50

100

150

Die Temperature (°C)

vs Temperature

Input Bias Current vs Temperature

-2

-3

-4

-5

-6

-2

-4

-50

Die Temperature (°C)

100

150

-50

100

Die Temperature (°C)

Slew Rate vs Temperature

Settling Time vs Accuracy

160

140

120

100

V =±2.5V

=2V

V =±12V

=5V

V =±12V

=2V

0.01

-50

100

150

0.1

Die Temperature (°C)

Accuracy (%)

EL2227C

Dual Very Low Noise Amplifier

Typical Performance Curves

Package Power Dissipation vs Ambient Temp.

JEDEC JESD51-3 Low Effective Thermal Conductivity Test Board

0.9

781mW

0.8

0.7

607mW

0.6

0.5

0.4

0.3

0.2

0.1

75 85 100

125

150

Ambient Temperature (°C)

EL2227C

Dual Very Low Noise Amplifier

Pin Descriptions

EL2227CY

8-Pin MSOP

EL2227CS

8-Pin SO

Pin Name

Pin Function

Equivalent Circuit

VOUTA

Output

V +

OUT

Circuit 1

VINA-

Input

V +

V -

Circuit 2

VINA+

VS-

Input

Supply

Input

Reference Circuit 2

VINB+

VINB-

VOUTB

VS+

Input

Reference Circuit 2

Reference Circuit 1

Output

Supply

EL2227C

Dual Very Low Noise Amplifier

Applications Information

choice for applications such as active filters, sample-

and-holds, or integrators.

Product Description

The EL2227C is a dual voltage feedback operational

amplifier designed especially for DMT ADSL and other

applications requiring very low voltage and current

noise. It also features low distortion while drawing mod-

erately low supply current and is built on Elantec's

proprietary high-speed complementary bipolar process.

The EL2227C use a classical voltage-feedback topology

which allows them to be used in a variety of applications

where current-feedback amplifiers are not appropriate

because of restrictions placed upon the feedback ele-

ment used with the amplifier. The conventional topology

of the EL2227C allows, for example, a capacitor to be

placed in the feedback path, making it an excellent

ADSL CPE Applications

The low noise EL2227C amplifier is specifically

designed for the dual differential receiver amplifier

function with ADSL transceiver hybrids as well as other

low-noise amplifier applications. A typical ADSL CPE

line interface circuit is shown in Figure 1. The EL2227C

is used in receiving DMT down stream signal. With

careful transceiver hybrid design and the EL2227C

1.9nV/ÖHz voltage noise and 1.2pA/ÖHz current noise

performance, -140dBm/Hz system background noise

performance can be easily achieved.

Driver

Input

Line +

OUT

LINE

Line -

OUT

Receive

Out +

Receive

Amplifiers

Receive

Out -

Figure 1. Typical Line Interface Connection

EL2227C

Dual Very Low Noise Amplifier

q_JA=Thermal Resistance of the Package

Disable Function

The EL2227C is in the standard dual amplifier package

without the enable/disable function. A simple way to

implement the enable/disable function is depicted

below. When disabled, both the positive and negative

supply voltages are disconnected (see Figure 2 below.)

PD_MAX=Maximum Power Dissipation of 1 Amplifier

V_S=Supply Voltage

I_MAX=Maximum Supply Current of 1 Amplifier

V_OUTMAX=Maximum Output Voltage Swing of the

Application

+12V

R_L=Load Resistance

1µF

10k

To serve as a guide for the user, we can calculate maxi-

mum allowable supply voltages for the example of the

10k

video cable-driver below since we know that T_JMAX

150°C, T_MAX= 75°C, I_SMAX= 9.5mA, and the package

q_JAs are shown in Table 1. If we assume (for this exam-

ple) that we are driving a back-terminated video cable,

then the maximum average value (over duty-cycle) of

V_OUTMAXis 1.4V, and R_L= 150W, giving the results

seen in Table 1.

1µF

4.7µF

75k

Table 1

Max PD_ISS

T_MAX

Part

Package

SO8

q_JA

Max V_S

Power Dissipation

EL2227CS

EL2227CY

160°C/W

206°C/W

0.406W @ 85°C

0.315W @ 85°C

With the wide power supply range and large output drive

capability of the EL2227C, it is possible to exceed the

150°C maximum junction temperatures under certain

load and power-supply conditions. It is therefore impor-

tant to calculate the maximum junction temperature

(T_JMAX) for all applications to determine if power sup-

ply voltages, load conditions, or package type need to be

modified for the EL2227C to remain in the safe operat-

ing area. These parameters are related as follows:

MSOP8

Single-Supply Operation

The EL2227C have been designed to have a wide input

and output voltage range. This design also makes the

EL2227C an excellent choice for single-supply opera-

tion. Using a single positive supply, the lower input

voltage range is within 200mV of ground (R_L= 500W),

and the lower output voltage range is within 875mV of

ground. Upper input voltage range reaches 3.6V, and

output voltage range reaches 3.8V with a 5V supply and

R_L= 500W. This results in a 2.625V output swing on a

single 5V supply. This wide output voltage range also

allows single-supply operation with a supply voltage as

high as 28V.

= T

+ (q ´ PD

)

MAXTOTAL

JMAX

MAX

where:

PD_MAXTOTALis the sum of the maximum power dissi-

pation of each amplifier in the package (PD_MAX

)

PD_MAXfor each amplifier can be calculated as follows:

Gain-Bandwidth Product and the -3dB

Bandwidth

OUTMAX

= 2 ´ V ´ I

+ (V – V

) ´ ----------------------------

MAX

SMAX

OUTMAX

The EL2227C have a gain-bandwidth product of

137MHz while using only 5mA of supply current per

amplifier. For gains greater than 2, their closed-loop ----

-3dB bandwidth is approximately equal to the gain-

where:

T_MAX=Maximum Ambient Temperature

EL2227C

Dual Very Low Noise Amplifier

bandwidth product divided by the noise gain of the cir-

cuit. For gains less than 2, higher-order poles in the

amplifiers' transfer function contribute to even higher

closed loop bandwidths. For example, the EL2227C

have a -3dB bandwidth of 115MHz at a gain of +2, drop-

ping to 28MHz at a gain of +5. It is important to note

that the EL2227C have been designed so that this

“extra” bandwidth in low-gain applications does not

come at the expense of stability. As seen in the typical

performance curves, the EL2227C in a gain of +2 only

exhibit 0.5dB of peaking with a 1000W load.

Output Drive Capability

The EL2227C have been designed to drive low imped-

ance loads. They can easily drive 6V_PPinto a 500W load.

This high output drive capability makes the EL2227C an

ideal choice for RF, IF and video applications.

Printed-Circuit Layout

The EL2227C are well behaved, and easy to apply in

most applications. However, a few simple techniques

will help assure rapid, high quality results. As with any

high-frequency device, good PCB layout is necessary

for optimum performance. Ground-plane construction is

highly recommended, as is good power supply bypass-

ing. A 0.1µF ceramic capacitor is recommended for

bypassing both supplies. Lead lengths should be as short

as possible, and bypass capacitors should be as close to

the device pins as possible. For good AC performance,

parasitic capacitances should be kept to a minimum at

both inputs and at the output. Resistor values should be

kept under 5kW because of the RC time constants associ-

ated with the parasitic capacitance. Metal-film and

carbon resistors are both acceptable, use of wire-wound

resistors is not recommended because of their parasitic

inductance. Similarly, capacitors should be low-induc-

tance for best performance.

EL2227C

Dual Very Low Noise Amplifier

General Disclaimer

Specifications contained in this data sheet are in effect as of the publication date shown. Elantec Semiconductor, Inc. reserves the right to make

changes in the circuitry or specifications contained herein at any time without notice. Elantec Semiconductor, Inc. assumes no responsibility for

the use of any circuits described herein and makes no representations that they are free from patent infringement.

WARNING - Life Support Policy

Elantec Semiconductor, Inc. products are not authorized for and should

not be used within Life Support Systems without the specific written con-

sent of Elantec Semiconductor, Inc. Life Support systems are equipment

intended to support or sustain life and whose failure to perform when

properly used in accordance with instructions provided can be reasonably

expected to result in significant personal injury or death. Users contem-

plating application of Elantec Semiconductor, Inc. Products in Life

Support Systems are requested to contact Elantec Semiconductor, Inc. fac-

tory headquarters to establish suitable terms & conditions for these

applications. Elantec Semiconductor, Inc.’s warranty is limited to replace-

ment of defective components and does not cover injury to persons or

property or other consequential damages.

Elantec Semiconductor, Inc.

675 Trade Zone Blvd.

Milpitas, CA 95035

Telephone: (408) 945-1323

(888) ELANTEC

(408) 945-9305

Fax:

European Office: +44-118-977-6020

Japan Technical Center: +81-45-682-5820

Printed in U.S.A.

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深圳市芯福林电子有限公司服务专线: 13418564337 在线联系:

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北京元坤伟业科技有限公司服务专线: 010-62104931621064316210489162104791 在线联系:

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首天国际（深圳）科技有限公司服务专线: 0755-82807802/82807803 在线联系:

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深圳市中利达电子科技有限公司服务专线: 0755-83200645/13686833545 在线联系:

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EL2227CS产品参数

型号:	EL2227CS
生命周期：	Transferred
包装说明：	SO-8
Reach Compliance Code：	unknown
风险等级：	5.68
Is Samacsys：	N
放大器类型：	OPERATIONAL AMPLIFIER
最大平均偏置电流 (IIB)：	9 µA
标称共模抑制比：	97 dB
最大输入失调电压：	3000 µV
JESD-30 代码：	R-PDSO-G8
负供电电压上限：	-14 V
标称负供电电压 (Vsup)：	-5 V
功能数量：	2
端子数量：	8
最高工作温度：	85 °C
最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP
封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE
认证状态：	Not Qualified
标称压摆率：	45 V/us
子类别：	Operational Amplifier
供电电压上限：	14 V
标称供电电压 (Vsup)：	5 V
表面贴装：	YES
技术：	BIPOLAR
温度等级：	INDUSTRIAL
端子形式：	GULL WING
端子位置：	DUAL
标称均一增益带宽：	137000 kHz
Base Number Matches：	1

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