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INA630

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Precision, low-power, indirect current feedback instrumentation amplifier

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Data sheet

INA630

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4.5 Input offset (±) (max) (µV) 250 Voltage gain (min) (V/V) 20 Voltage gain (max) (V/V) 1000 Noise at 1 kHz (typ) (nV√Hz) 40 Features Super Beta CMRR (min) (dB) 130 Input offset drift (±) (max) (µV/°C) 2 Input bias current (±) (max) (nA) 10 Iq (typ) (mA) 0.3 Bandwidth at min gain (typ) (MHz) 0.55 Gain error (±) (max) (%) 0.1 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.001 Input common mode headroom (to negative supply) (typ) (V) 1.5 Input common mode headroom (to positive supply) (typ) (V) -1.5 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 2
Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4.5 Input offset (±) (max) (µV) 250 Voltage gain (min) (V/V) 20 Voltage gain (max) (V/V) 1000 Noise at 1 kHz (typ) (nV√Hz) 40 Features Super Beta CMRR (min) (dB) 130 Input offset drift (±) (max) (µV/°C) 2 Input bias current (±) (max) (nA) 10 Iq (typ) (mA) 0.3 Bandwidth at min gain (typ) (MHz) 0.55 Gain error (±) (max) (%) 0.1 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.001 Input common mode headroom (to negative supply) (typ) (V) 1.5 Input common mode headroom (to positive supply) (typ) (V) -1.5 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 2
SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8
  • Optimized for cost and size sensitive applications
  • Super-beta bipolar precision:
    • High common-mode rejection: 126dB (minimum) for G = 20V/V to 1000V/V
    • Low offset voltage: 60µV (typical), 350µV (maximum)
    • Low offset voltage drift: 0.7µV/°C (typical), 2µV/°C (maximum)
    • Low gain non-linearity: 10ppm (G = 100V/V) (maximum)
    • High power supply rejection: 123dB (minimum) for G = 20V/V to 1000V/V
    • Voltage noise density: 40nV/√Hz at f = 1kHz
  • Gain set with external resistor divider for G ≥ 20V/V
    • Maximum differential input voltages of ±125mV
  • Bandwidth: 550kHz (G = 20), 100kHz (G = 100)
  • Supply range:
    • Single-supply: 4.5V to 36V
    • Dual-supply: ±2.25V to ±18V
    • Supply current: 300µA (typical)
  • Specified temperature range: –40°C to +125°C
  • Optimized for cost and size sensitive applications
  • Super-beta bipolar precision:
    • High common-mode rejection: 126dB (minimum) for G = 20V/V to 1000V/V
    • Low offset voltage: 60µV (typical), 350µV (maximum)
    • Low offset voltage drift: 0.7µV/°C (typical), 2µV/°C (maximum)
    • Low gain non-linearity: 10ppm (G = 100V/V) (maximum)
    • High power supply rejection: 123dB (minimum) for G = 20V/V to 1000V/V
    • Voltage noise density: 40nV/√Hz at f = 1kHz
  • Gain set with external resistor divider for G ≥ 20V/V
    • Maximum differential input voltages of ±125mV
  • Bandwidth: 550kHz (G = 20), 100kHz (G = 100)
  • Supply range:
    • Single-supply: 4.5V to 36V
    • Dual-supply: ±2.25V to ±18V
    • Supply current: 300µA (typical)
  • Specified temperature range: –40°C to +125°C

The INA630 is a high-precision instrumentation amplifier that offers low power consumption and operates over a wide single-supply or dual-supply range. The INA630 is optimized for small differential voltages (±125mV maximum) while providing excellent common-mode suppression (126dB CMRR). The INA630 offers flexible gain setting with an external resistor divider of minimum G = 20V/V.

The INA630 is based on an indirect current feedback architecture that offers low gain error and non-linearity. Due to the architecture the reference pin impedance does not degrade the CMRR performance. The device enables wider input and output voltage range compared to traditional instrumentation amplifiers. The device has high precision as a result of super-beta input transistors, which provide low input offset voltage, offset voltage drift, low bias current and current noise.

The INA630 is a high-precision instrumentation amplifier that offers low power consumption and operates over a wide single-supply or dual-supply range. The INA630 is optimized for small differential voltages (±125mV maximum) while providing excellent common-mode suppression (126dB CMRR). The INA630 offers flexible gain setting with an external resistor divider of minimum G = 20V/V.

The INA630 is based on an indirect current feedback architecture that offers low gain error and non-linearity. Due to the architecture the reference pin impedance does not degrade the CMRR performance. The device enables wider input and output voltage range compared to traditional instrumentation amplifiers. The device has high precision as a result of super-beta input transistors, which provide low input offset voltage, offset voltage drift, low bias current and current noise.

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* Data sheet INA630 Precision, 126dB CMRR, Indirect Current Feedback Instrumentation Amplifier datasheet (Rev. A) PDF | HTML 02 Jul 2025
Product overview Improving Signal Chain Performance with Alternative IA Topologies PDF | HTML 16 Jul 2025

Design & development

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Evaluation board

INA630EVM — INA630 evaluation module

The INA630 evaluation module (EVM) is designed to allow banana connections for 4.5V to 36V DC power supplies. Input signal and output signal are also connected with banana connections. Gain on the EVM is set using 0805 discrete resistors or the RES11A resistor network. The voltage reference (...)
User guide: PDF | HTML
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Simulation model

INA630 PSpice Reference Design

SBOMCN9.ZIP (669 KB) - PSpice Model
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Simulation model

INA630 TINA-TI Reference Design

SBOMCO0.TSC (13 KB) - TINA-TI Reference Design
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Simulation model

INA630 TINA-TI SPICE Model

SBOMCO1.ZIP (2 KB) - TINA-TI Spice Model
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Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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Reference designs

TIDA-010086 — Digital control cost-optimized 10-A battery formation and test reference design

This reference design provides a cost-effective design for multichannel battery formation and test applications. The design uses the C2000™ real-time microcontroller (MCU) with 16-channel simultaneous sampling precision ADC, which can be scaled up to support 8-channel cell testing. The design (...)
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