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INA128UA

The INA128UA is an electronic component. View the full INA128UA datasheet below including electrical characteristics, absolute maximum ratings.

Overview

Part: INA128, INA129 — Texas Instruments

Type: Precision, Low-Power Instrumentation Amplifier

Description: Low-power, general-purpose instrumentation amplifiers offering excellent accuracy. The versatile three op amp design provides wide bandwidth (200 kHz at G = 100) and allows gain from 1 to 10,000 to be set by a single external resistor.

Operating Conditions:

  • Supply voltage: ±2.25 V to ±18 V
  • Operating temperature: -40°C to +85°C
  • Gain range: 1 to 10,000

Key Specs:

  • Low offset voltage: 50 μV, maximum
  • Low drift: 0.5 μV/°C, maximum
  • Low input bias current: 5 nA, maximum
  • Low noise: 8 nV/√Hz
  • High CMR: 120 dB, minimum
  • Bandwidth: 1.3 MHz (G = 1)
  • Low quiescent current: 700 μA
  • Inputs protected to ±40 V

Features:

  • Low offset voltage: 50 μV, maximum
  • Low drift: 0.5 μV/°C, maximum
  • Low input bias current: 5 nA, maximum
  • Low noise: 8 nV/√Hz, 0.2 μVpp
  • High CMR: 120 dB, minimum
  • Bandwidth: 1.3 MHz (G = 1)
  • Inputs protected to ±40 V
  • Wide supply range: ±2.25 V to ±18 V
  • Low quiescent current: 700 μA
  • Packages: 8-pin plastic DIP, SO-8

Applications:

  • Pressure transmitter
  • Temperature transmitter
  • Weigh scale
  • Electrocardiogram (ECG)
  • Analog input module
  • Data acquisition (DAQ)

Package:

  • SOIC (8): 3.91 mm × 4.90 mm
  • PDIP (8): 6.35 mm × 9.81 mm

Features

  • ·
  • Low offset voltage: 50 μV, maximum
  • Low drift: 0.5 μV/°C, maximum
  • Low input bias current: 5 nA, maximum
  • Low noise: 8 nV/√Hz, 0.2 μVpp
  • High CMR: 120 dB, minimum
  • Bandwidth: 1.3 MHz (G = 1)
  • Inputs protected to ±40 V
  • Wide supply range: ±2.25 V to ±18 V
  • Low quiescent current: 700 μA
  • Packages: 8-pin plastic DIP, SO-8

Applications

Pin Configuration

Figure 6-1. D (8-Pin SOIC) and P (8-Pin PDIP) Packages, Top View

Table 6-1. Pin Functions

PINPINTYPE
NAMENO.TYPE
REF5Input
R G1,8-
V-4Power
V+7Power
V IN-2Input
V IN+3Input
V O6Output

Table 6-1. Pin Functions

Electrical Characteristics

at T A = 25°C, VS = ±15 V, RL = 10 kΩ, VREF = 0 V, VCM = VS / 2, and G = 1 (unless otherwise noted)

PARAMETERTEST CONDITIONSTEST CONDITIONSTEST CONDITIONSMINTYPMAXUNIT
INPUTINPUTINPUTINPUTINPUTINPUTINPUTINPUTINPUT
V OSOffset voltage (RTI)1 ≤ G ≤ 10000INA12xP, INA12xUINA12xP, INA12xU±10 ±100 / G±50 ±500 / GμV
V OSOffset voltage (RTI)1 ≤ G ≤ 10000INA12xPA, INA12xUAINA12xPA, INA12xUA±25 ±100 / G±125 ±1000 / GμV
Offset voltage drift (RTI)T A = -40°C to +85°CINA12xP, INA12xUINA12xP, INA12xU±0.2 ±2 / G±0.5 ±20 / GμV/°C
Offset voltage drift (RTI)T A = -40°C to +85°CINA12xPA, INA12xUAINA12xPA, INA12xUA±0.2 ±5 / G±1 ±20 / GμV/°C
PSRRPower-supply rejection ratio (RTI)V S = ±2.25 V to ±18 VINA12xP, INA12xUINA12xP, INA12xU±0.2 ±20 / G±1 ±100 / GμV/V
PSRRPower-supply rejection ratio (RTI)
Long-term stability
V S = ±2.25 V to ±18 VINA12xPA, INA12xUAINA12xPA, INA12xUA±0.2 ±3 / G±2 ±200 / GμV/V
μV/mo
Input impedanceDifferential10 \\2
Input impedanceCommon-mode100 \\9
V CMCommon-mode voltage (2)
Safe input voltage
V O = 0 V
R S = 0 Ω
(V-) + 2(V+) - 2
±40
V
V
CMRRCommon-mode rejection ratioΔR S = 1 kΩ, V CM = ±13 VG = 1INA12xP, INA12xU8086dB
CMRRCommon-mode rejection ratioΔR S = 1 kΩ, V CM = ±13 VG = 1INA12xPA, INA12xUA73dB
CMRRCommon-mode rejection ratioΔR S = 1 kΩ, V CM = ±13 VG = 10INA12xP, INA12xU100106dB
CMRRCommon-mode rejection ratioΔR S = 1 kΩ, V CM = ±13 VG = 10INA12xPA, INA12xUA93dB
CMRRCommon-mode rejection ratioΔR S = 1 kΩ, V CM = ±13 VG = 100INA12xP, INA12xU120125dB
CMRRCommon-mode rejection ratioΔR S = 1 kΩ, V CM = ±13 VG = 100INA12xPA, INA12xUA110dB
CMRRCommon-mode rejection ratioΔR S = 1 kΩ, V CM = ±13 VINA12xP, INA12xU120130dB
CMRRCommon-mode rejection ratioΔR S = 1 kΩ, V CM = ±13 VG = 1000INA12xPA, INA12xUA110dB
INPUT BIAS CURRENTINPUT BIAS CURRENTINPUT BIAS CURRENTINPUT BIAS CURRENTINPUT BIAS CURRENTINPUT BIAS CURRENTINPUT BIAS CURRENTINPUT BIAS CURRENTINPUT BIAS CURRENT
Input bias currentINA12xP, INA12xU±2±5nA
I BInput bias current
Input bias current drift
INA12xPA, INA12xUA
T A = -40°C to +85°C
±30±10nA
pA/ °C
I OSInput offset currentINA12xP, INA12xU±1±5nA
I OSInput offset current
Input offset current drift
INA12xPA, INA12xUA
T A = -40°C to +85°C
±30±10nA
pA/ °C
NOISENOISENOISENOISENOISENOISENOISENOISENOISE
e NVoltage noise (RTI)G = 1000, R S = 0 Ωf = 10 Hzf = 10 Hz10nV/√Hz
e NVoltage noise (RTI)G = 1000, R S = 0 Ωf = 100 Hzf = 100 Hz8nV/√Hz
e NVoltage noise (RTI)G = 1000, R S = 0 Ωf = 1 kHzf = 1 kHz8nV/√Hz
e NVoltage noise (RTI)G = 1000, R S = 0 Ωf B = 0.1 Hz to 10 Hzf B = 0.1 Hz to 10 Hz0.2μV PP
I nCurrent noisef = 10 Hz0.9pA/√Hz
I nCurrent noisef = 1 kHz0.3pA/√Hz
I nCurrent noisef B = 0.1 Hz to 10 Hz30pA PP

Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)

MINMAXUNIT
V SSupply voltageDual supply, V S = (V+) - (V-)±18V
V SSingle supply, V S = (V+) - 0 V36V
Analog input voltage
Output short-circuit (2)
Continuous±40V
T AOperating temperature-40125°C
Junction temperature150°C
Lead temperature (soldering, 10s)300°C
T stgStorage temperature-55125°C

Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MINTYPMAXUNIT
V SSupply voltage4.53036V
Input common-mode voltage range for V O = 0 V±2.25 (V-) + 2±15±18 (V+) - 2V
T ASpecified temperature-4085°C

Thermal Information

INA12xINA12x
THERMAL METRIC (1)THERMAL METRIC (1)D (SOIC)P (PDIP)
8 PINS8 PINS
R θJAJunction-to-ambient thermal resistance11046.1
R θJC(top)Junction-to-case (top) thermal resistance5734.1
R θJBJunction-to-board thermal resistance5423.4
ψ JTJunction-to-top characterization parameter1111.3
ψ JBJunction-to-board characterization parameter5323.2

Typical Application

The INA12x measure a small differential voltage with a high common-mode voltage developed between the noninverting and inverting input. The high input-voltage protection circuit in conjunction with high input impedance make the INA12x an excellent choice for a wide range of applications. The ability to set the reference pin to adjust the functionality of the output signal offers additional flexibility that is practical for multiple configurations.

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