OPA128SM各脚功能电路原理芯片引脚定义引脚图及功能IC贸易商-中国IC网-芯三七

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产品型号OPA128SM的概述

OPA128SM的概述 OPA128SM是一款高性能的精密运算放大器，兼具低噪声、低失真和高带宽的特性，广泛应用于高精度模拟信号处理。作为运算放大器的一种，它在医疗设备、仪器仪表、音频处理和数据采集系统中得到了广泛应用。OPA128系列以其低偏置电流和高共模抑制比而著称，使其在电压放大和信号处理方面表现出色。该芯片特别适合于需要高精度和高可靠性的应用场景，如传感器信号调理、高阻抗信号放大等。 OPA128SM的详细参数 OPA128SM的技术参数侧重于其性能指标。以下是其一些主要性能参数： - 增益带宽积：10 MHz - 输入偏置电流：最大为200 pA - 输入失调电压：最大为100 µV - 共模抑制比：100 dB - 电源电压范围：±2 V至±18 V - 输出电流：典型为20 mA - 工作温度范围：-55°C 到 +125°C - 功耗：典型的静态功耗为2.5 mA - ...

产品型号OPA128SM的Datasheet PDF文件预览

OPA128

Difet^®Electrometer-Grade

OPERATIONAL AMPLIFIER

FEATURES

APPLICATIONS

● ULTRA-LOW BIAS CURRENT: 75fA max

● ELECTROMETER

● MASS SPECTROMETER

● CHROMATOGRAPH

● ION GAUGE

● LOW OFFSET: 500µV max

● LOW DRIFT: 5µV/°C max

● HIGH OPEN-LOOP GAIN: 110dB min

● HIGH COMMON-MODE REJECTION:

● PHOTODETECTOR

90dB min

● RADIATION-HARD EQUIPMENT

● IMPROVED REPLACEMENT FOR AD515

AND AD549

DESCRIPTION

Case (Guard)

The OPA128 is an ultra-low bias current monolithic

operational amplifier. Using advanced geometry

dielectrically-isolated FET (Difet^®) inputs, this mono-

lithic amplifier achieves a performance level exceed-

ing even the best hybrid electrometer amplifiers.

–In

Laser-trimmed thin-film resistors give outstanding volt-

age offset and drift performance.

A noise-free cascode and low-noise processing give

the OPA128 excellent low-level signal handling capa-

bilities. Flicker noise is very low.

Noise-Free

Cascode

+In

Output

The OPA128 is an improved pin-for-pin replacement

for the AD515.

28kΩ

2kΩ

28kΩ

2kΩ

Trim

1kΩ

Difet^®Burr-Brown Corp.

Trim

–V

OPA128 Simplified Circuit

International Airport Industrial Park

•

Mailing Address: PO Box 11400, Tucson, AZ 85734

•

Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706

Telex: 066-6491 FAX: (520) 889-1510

• Tel: (520) 746-1111 • Twx: 910-952-1111

Internet: http://www.burr-brown.com/

•

FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP

•

Immediate Product Info: (800) 548-6132

PDS-653E

Printed in U.S.A. May, 1995

SBOS148

SPECIFICATIONS

ELECTRICAL

At V_CC= ±15VDC and T_A= +25°C, unless otherwise noted. Pin 8 connected to ground.

OPA128JM

OPA128KM

TYP MAX

OPA128LM

TYP MAX

OPA128SM

TYP MAX

PARAMETER

INPUT

CONDITIONS

MIN

TYP MAX

MIN

UNITS

BIAS CURRENT⁽¹⁾

Input Bias Current

V_CM= 0VDC,

R_L≥ 10kΩ

±150 ±300

±75

±150

±40

±75

±150

OFFSET CURRENT⁽¹⁾

Input Offset Current

V_CM= 0VDC,

R_L≥ 10kΩ

OFFSET VOLTAGE⁽¹⁾

Input Offset Voltage

Average Drift

V_CM= 0VDC

T_A= T_MINto T_MAX

±260 ±1000

±140 ±500

±10

120

±140 ±500

±10

120

µV

µV/°C

±20

±5

Supply Rejection

120

±1

±100

±1

±32

±1

±32

±1

±32

µV/V

NOISE

Voltage: f_O= 10Hz

f_O= 100Hz

f_O= 1kHz

f_O= 10kHz

f_B= 10Hz to 10kHz

f_B= 0.1Hz to 10Hz

Current: f_B= 0.1Hz to 10Hz

f_O= 0.1Hz to 20kHz

2.4

nV/√Hz

µVrms

µVp-p

4.2

0.22

0.16

2.3

0.12

0.16

fA, p-p

fA/√Hz

IMPEDANCE

Differential

Common-Mode

10¹³|| 1

10¹⁵|| 2

10¹³|| 1

10¹⁵|| 2

10¹³|| 1

10¹⁵|| 2

10¹³|| 1

10¹⁵|| 2

Ω || pF

VOLTAGE RANGE⁽⁴⁾

Common-Mode Input Range

Common-Mode Rejection

±10

±12

118

±10

±12

118

±10

±12

118

±10

±12

118

V_IN= ±10VDC

R_L≥ 2kΩ

OPEN-LOOP GAIN, DC

Open-Loop Voltage Gain

FREQUENCY RESPONSE

128

110

128

110

128

110

128

(2)

Unity Gain, Small Signal

Full Power Response

Slew Rate

Settling Time, 0.1%

0.01%

0.5

MHz

kHz

V/µs

µs

20Vp-p, R_L= 2kΩ

V_O= ±10V, R_L=2kΩ 0.5

Gain = –1, R_L= 2kΩ

10V Step

µs

Overload Recovery,

50% Overdrive⁽³⁾

Gain = –1

µs

RATED OUTPUT

Voltage Output

Current Output

Output Resistance

Load Capacitance Stability

Short Circuit Current

R_L= 2kΩ

V_O= ±10VDC

DC, Open Loop

Gain = +1

±10

±5

±13

±10

100

1000

±10

±5

±13

±10

100

1000

±10

±5

±13

±10

100

1000

±10

±5

±13

±10

100

1000

Ω

POWER SUPPLY

Rated Voltage

±15

VDC

Voltage Range,

Derated Performance

Current, Quiescent

±5

±18

1.5

±5

±18

1.5

±5

±18

1.5

±5

±18

1.5

VDC

I_O= 0mADC

0.9

TEMPERATURE RANGE

Specification

Operating

Storage

Ambient Temp.

–55

–65

+70

+125

+150

–55

–65

+70

+125

+150

–55

–65

+70

+125

+150

–55

–65

+125

+150

°C

θ Junction-Ambient

200

°C/W

NOTES: (1) Offset voltage, offset current, and bias current are measured with the units fully warmed up. Bias current doubles approximately every 11°C. (2) Sample

tested. (3) Overload recovery is defined as the time required for the output to return from saturation to linear operation following the removal of a 50% input overdrive.

(4) If it is possible for the input voltage to exceed the supply voltage, a series protection resistor should be added to limit input current to 0.5mA. The input devices

can withstand overload currents of 0.3mA indefinitely without damage.

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes

no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change

without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant

any BURR-BROWN product for use in life support devices and/or systems.

OPA128

ELECTRICAL (FULL TEMPERATURE RANGE SPECIFICATIONS)

At V_CC= ±15VDC and T_A= T_MINand T_MAX, unless otherwise noted.

OPA128JM

TYP MAX

OPA128KM

TYP MAX

OPA128LM

TYP MAX

OPA128SM

TYP MAX

PARAMETER

CONDITIONS

MIN

UNITS

TEMPERATURE RANGE

Specification Range

INPUT

Ambient Temp.

+70

–55

+125

°C

BIAS CURRENT⁽¹⁾

Input Bias Current

V_CM= 0VDC

±2.5

±8

±1.3

±4

±0.7

±2

±43

±170

OFFSET CURRENT⁽¹⁾

Input Offset Current

1.1

0.6

OFFSET VOLTAGE⁽¹⁾

Input Offset Voltage

Average Drift

±2.2mV

±20

±1mV

±10

±750

±5

±1.5mV

±10

µV

µV/°C

Supply Rejection

114

106

±2

±200

±2

±100

±2

±100

±5

±100

µV/V

VOLTAGE RANGE⁽²⁾

Common-Mode Input Range

Commmon-Mode Rejection

±10

±11

112

±10

±11

112

±10

±11

112

±10

±11

104

V_IN= ±10VDC

R_L≥ 2kΩ

OPEN-LOOP GAIN, DC

Open-Loop Voltage Gain

RATED OUTPUT

125

104

125

104

125

122

Voltage Output

Current Output

Short Circuit Current

R_L= 2k

V_O= ±10VDC

V_O= 0VDC

±10

±5

±10

±5

±10

±5

±10

±5

POWER SUPPLY

Current, Quiescent

I = 0mADC

0.9

1.8

0.9

1.8

0.9

1.8

0.9

NOTES: (1) Offset voltage, offset current, and bias current are measured with the units fully warmed up. (2) If it is possible for the input voltage to exceed the supply

voltage, a series protection resistor should be added to limit input current to 0.5mA. The input devices can withstand overload currents of 0.3mA indefinitely without

damage.

CONNECTION DIAGRAM

ORDERING INFORMATION

TEMPERATURE

BIAS CURRENT,

max (fA)

Top View

PRODUCT

PACKAGE

RANGE

Substrate and Case

OPA128JM

OPA128KM

OPA128LM

OPA128SM

TO-99

0°C to +70°C

±300

±150

±75

Offset

Trim

+V_CC

–55°C to +125°C

±150

–In

OPA128

Output

PACKAGE INFORMATION

Offset

Trim

PACKAGE DRAWING

NUMBER⁽¹⁾

+In

PRODUCT

PACKAGE

–V_CC

OPA128JM

OPA128KM

OPA128LM

OPA128SM

TO-99

001

ABSOLUTE MAXIMUM RATINGS

NOTE: (1) For detailed drawing and dimension table, please see end of data

sheet, or Appendix C of Burr-Brown IC Data Book.

Supply ........................................................................................... ±18VDC

Internal Power Dissipation⁽¹⁾.......................................................... 500mW

Differential Input Voltage .............................................................. ±36VDC

Input Voltage Range ..................................................................... ±18VDC

Storage Temperature Range .......................................... –65°C to +150°C

Operating Temperature Range ....................................... –55°C to +125°C

Lead Temperature (soldering, 10s) ............................................... +300°C

Output Short Circuit Duration⁽²⁾................................................ Continuous

Junction Temperature .................................................................... +175°C

NOTES: (1) Packages must be derated based on θ_CA= 150°C/W or θ_JA

200°C/W. (2) Short circuit may be to power supply common only. Rating

applies to +25°C ambient. Observe dissipation limit and T_J.

OPA128

DICE INFORMATION

PAD

FUNCTION

Offset Trim

–In

+In

–V_CC

Offset Trim

Output

+V_CC

Substrate

No Connection

Substrate Bias: Isolated, normally con-

nected to common.

MECHANICAL INFORMATION

MILS (0.001")

MILLIMETERS

Die Size

Die Thickness

Min. Pad Size

96 x 71 ±5

20 ±3

4 x 4

2.44 x 1.80 ±0.13

0.51 ±0.08

0.10 x 0.10

Backing

None

OPA128 DIE TOPOGRAPHY

TYPICAL PERFORMANCE CURVES

At T_A= +25°C, ±15VDC, unless otherwise noted.

OPEN-LOOP FREQUENCY RESPONSE

140

POWER SUPPLY REJECTION vs FREQUENCY

140

120

100

–45

–90

120

100

Gain

+PSRR

Phase

Margin

90°

–PSRR

–135

–180

100

10k

100k

10M

100

10k

100k

10M

Frequency (Hz)

COMMON-MODE REJECTION

vs FREQUENCY

COMMON-MODE REJECTION

vs INPUT COMMON-MODE VOLTAGE

140

120

100

120

110

100

10k

100k

10M

–15

–10

–5

Frequency (Hz)

Common-Mode Voltage (V)

OPA128

TYPICAL PERFORMANCE CURVES (CONT)

At T_A= +25°C, +15VDC, unless otherwise noted.

BIAS AND OFFSET CURRENT

vs TEMPERATURE

BIAS AND OFFSET CURRENT

vs INPUT COMMON-MODE VOLTAGE

100pA

10pA

1pA

I_B

I_OS

100

0.1

0.01

–50

–25

100

125

–15

–10

–5

Common-Mode Voltage (V)

Ambient Temperature (°C)

GAIN-BANDWIDTH AND SLEW RATE

vs SUPPLY VOLTAGE

GAIN-BANDWIDTH AND SLEW RATE

vs TEMPERATURE

+ Slew

– Slew

–75

–50

–25

100 125

Supply Voltage (±V_CC

)

Ambient Temperature (°C)

OPEN-LOOP GAIN, PSR, AND CMR vs TEMPERATURE

SUPPLY CURRENT vs TEMPERATURE

140

130

120

1.5

A_OL

CMR

110

100

0.5

PSR

–75

–50

–25

100 125

–75

–50

–25

100 125

Ambient Temperature (°C)

OPA128

TYPICAL PERFORMANCE CURVES (CONT)

At T_A= +25°C, +15VDC, unless otherwise noted.

SMALL SIGNAL TRANSIENT RESPONSE

LARGE SIGNAL TRANSIENT RESPONSE

–10

–40

–80

5µs

20mV

1µs

Time (µs)

BIAS CURRENT

vs ADDITIONAL POWER DISSIPATION

COMMON-MODE INPUT RANGE

vs SUPPLY VOLTAGE

100pA

10pA

1pA

100

150

200

250

300

350

Additional Power Dissipation (mW)

Supply Voltage (±V_CC

)

INPUT VOLTAGE NOISE SPECTRAL DENSITY

FULL-POWER OUTPUT vs FREQUENCY

100

10k

100k

10k

100k

Frequency (Hz)

OPA128

The amplifier case should be connected to any input shield or

guard via pin 8. This insures that the amplifier itself is fully

surrounded by guard potential, minimizing both leakage and

noise pickup (see Figure 2).

APPLICATIONS INFORMATION

OFFSET VOLTAGE ADJUSTMENT

The OPA128 offset voltage is laser-trimmed and will require

no further trim for most applications. As with most amplifi-

ers, externally trimming the remaining offset can change

drift performance by about 0.3µV/°C for each 100µV of

adjusted effort. Note that the trim (Figure 1) is similar to

operational amplifiers such as HA-5180 and AD515. The

OPA128 can replace many other amplifiers by leaving the

external null circuit unconnected.

Non-Inverting

Buffer

Out

OPA128

Inverting

TO-99 Bottom View

OPA128

Out

±10mV Typical

Trim Range

OPA128

(1)

NOTE: (1) 10kΩ to 1MΩ

Trim Potentiometer

–V

(100kΩ Recommended)

BOARD LAYOUT

FOR INPUT GUARDING

Guard top and bottom of board.

Alternate: use Teflon^®standoff

for sensitive input pins.

FIGURE 1. Offset Voltage Trim.

Teflon^®E.I. Du Pont de Nemours & Co.

INPUT PROTECTION

Conventional monolithic FET operational amplifiers’ inputs

must be protected against destructive currents that can flow

when input FET gate-to-substrate isolation diodes are for-

ward-biased. Most BIFET^®amplifiers can be destroyed by

the loss of –V_CC.

FIGURE 2. Connection of Input Guard.

Triboelectric charge (static electricity generated by friction)

can be a troublesome noise source from cables connected to

theinputofanelectrometeramplifier.Speciallow-noisecable

will minimize this effect but the optimum solution is to mount

the signal source directly at the electrometer input with short,

rigid, wiring to preclude microphonic noise generation.

Because of its dielectric isolation, no special protection is

needed on the OPA128. Of course, the differential and

common-mode voltage limits should be observed.

Static damage can cause subtle changes in amplifier input

characteristics without necessarily destroying the device. In

precision operational amplifiers (both bipolar and FET types),

this may cause a noticeable degradation of offset voltage and

drift.

TESTING

AccuratelytestingtheOPA128isextremelydifficultduetoits

high level of performance. Ordinary test equipment may not

be able to resolve the amplifier’s extremely low bias current.

Static protection is recommended when handling any preci-

sion IC operational amplifier.

Inaccurate bias current measurements can be due to:

1. Test socket leakage

2. Unclean package

GUARDING AND SHIELDING

3. Humidity or dew point condensation

As in any situation where high impedances are involved,

careful shielding is required to reduce “hum” pickup in input

leads. If large feedback resistors are used, they should also be

shielded along with the external input circuitry. Leakage

currents across printed circuit boards can easily exceed the

bias current of the OPA128. To avoid leakage problems, it is

recommended that the signal input lead of the OPA128 be

wired to a Teflon standoff. If the input is to be soldered

directly into a printed circuit board, utmost care must be used

in planning the board layout. A “guard” pattern should

completely surround the high impedance input leads and

should be connected to a low impedance point which is at the

signal input potential.

4. Circuit contamination from fingerprints or anti-static

treatment chemicals

5. Test ambient temperature

6. Load power dissipation

BIFET^®National Semiconductor Corp.

OPA128

500Ω

9.5kΩ

Guard

C_F

R_F

10pF

10¹¹

+15V

1VDC

Output

Ω

OPA128

Output

e_O

Offset Trim

OPA128

100kΩ

pH Probe

R_S≈ 500MΩ

50mV Output

∆Q

–15V

e_O= –∆Q/C_F

100pF

10¹¹

Ω

Low Frequency Cutoff =

1/(2 π R_FC_F) = 0.16Hz

FIGURE 3. High Impedance (10¹⁵Ω) Amplifier.

FIGURE 4. Piezoelectric Transducer Charge Amplifier.

_B≈ 100fA

Gain = 100

CMRR ≈ 118dB

_IN≈ 10¹⁵

–In

OPA128

Ω

R_F

10kΩ

25kΩ

R_G

202Ω

R_F

10kΩ

Output

Burr-Brown

INA105

Differential

Amplifier

25kΩ

OPA128

+In

Differential Voltage Gain = 1 + 2R_F/R_G

FIGURE 5. FET Input Instrumentation Amplifier for Biomedical Applications.

10kΩ

≈10pF

(1)

1MΩ

1N914

Output

OPA128

(1)

OPA606

Input

Droop ≈ 100µV/s

1N914

2N4117A

1000µF

Polystyrene

NOTE: (1) Reverse polarity

for negative peak detection.

FIGURE 6. Low-Droop Positive Peak Detector.

OPA128

<1pF to prevent gain peaking.

10¹⁰Ω

1000MΩ

2kΩ

18kΩ

Silicon Detector Corp.

SD-020-11-21-011

+15V

0.1µF

Guard

Current

Input

OPA128

Output

OPA128

5 x 10⁹V/W

0.1µF

V_O= –1V/nA

0.01µF

10¹⁰Ω

–15V

Circuit must be well shielded.

FIGURE 7. Sensitive Photodiode Amplifier.

FIGURE 8. Current-to-Voltage Converter.

10⁹Ω

+5V

OPA128

Biased

Current

Transducer

INA101HP

Output

+15V

V_O= 1mV/pA

REF101

+5V

FIGURE 9. Biased Current-to-Voltage Converter.

OPA128

PACKAGE OPTION ADDENDUM

www.ti.com

22-Jun-2005

PACKAGING INFORMATION

Orderable Device

Status ⁽¹⁾

Package Package

Pins Package Eco Plan ⁽²⁾Lead/Ball Finish MSL Peak Temp ⁽³⁾

Qty

Type

TO-99

Drawing

OPA128JM

OPA128KM

OPA128LM

OPA128SM

NRND

LMC

TBD

Call TI

Level-NA-NA-NA

LMC

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

(2)

Eco Plan

The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS

no Sb/Br)

please check

http://www.ti.com/productcontent for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered

at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame

retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is

provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the

accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take

reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on

incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited

information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI

to Customer on an annual basis.

Addendum-Page 1

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www.ti.com/wireless

Mailing Address:

Texas Instruments

Post Office Box 655303 Dallas, Texas 75265

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OPA128SM产品参数

型号:	OPA128SM
是否Rohs认证：	不符合
生命周期：	Transferred
Reach Compliance Code：	unknown
风险等级：	5.8
放大器类型：	OPERATIONAL AMPLIFIER
架构：	VOLTAGE-FEEDBACK
最大平均偏置电流 (IIB)：	0.00017 µA
25C 时的最大偏置电流 (IIB)：	1.5e-7 µA
最小共模抑制比：	90 dB
标称共模抑制比：	104 dB
频率补偿：	YES
最大输入失调电压：	1500 µV
JESD-30 代码：	O-MBCY-W8
JESD-609代码：	e0
低-偏置：	YES
低-失调：	NO
负供电电压上限：	-18 V
标称负供电电压 (Vsup)：	-15 V
功能数量：	1
端子数量：	8
最高工作温度：	125 °C
最低工作温度：	-55 °C
封装主体材料：	METAL
封装等效代码：	CAN8,.2
封装形状：	ROUND
封装形式：	CYLINDRICAL
电源：	+-15 V
认证状态：	Not Qualified
最小摆率：	1 V/us
标称压摆率：	3 V/us
子类别：	Operational Amplifier
最大压摆率：	4 mA
供电电压上限：	18 V
标称供电电压 (Vsup)：	15 V
表面贴装：	NO
技术：	BIPOLAR
温度等级：	MILITARY
端子面层：	Tin/Lead (Sn/Pb)
端子形式：	WIRE
端子位置：	BOTTOM
标称均一增益带宽：	1000 kHz
最小电压增益：	320000
Base Number Matches：	1

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