Product details

Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 8 Input offset (+/-) (Max) (uV) 35 Gain (Min) (V/V) 2000 Gain (Max) (V/V) 2000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 1.5 Features Ultra-low noise, High speed, Super-beta, Current Feedback CMRR (Min) (dB) 132 Input offset drift (+/-) (Max) (uV/C) 0.45 Input bias current (+/-) (Max) (nA) 50 Iq (Typ) (mA) 6.2 Bandwidth at min gain (Typ) (MHz) 2.8 Gain error (+/-) (Max) (%) 0.15 Operating temperature range (C) -40 to 125 Type Fixed Gain Output swing headroom (to negative supply) (Typ) (V) 0.15 Output swing headroom (to positive supply) (Typ) (V) -0.15 Input common mode headroom (to negative supply) (Typ) (V) 2.5 Input common mode headroom (to positive supply) (Typ) (V) -2.5 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 0.055 Gain non-linearity (+/-) (Max) (%) 0.001
Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 8 Input offset (+/-) (Max) (uV) 35 Gain (Min) (V/V) 2000 Gain (Max) (V/V) 2000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 1.5 Features Ultra-low noise, High speed, Super-beta, Current Feedback CMRR (Min) (dB) 132 Input offset drift (+/-) (Max) (uV/C) 0.45 Input bias current (+/-) (Max) (nA) 50 Iq (Typ) (mA) 6.2 Bandwidth at min gain (Typ) (MHz) 2.8 Gain error (+/-) (Max) (%) 0.15 Operating temperature range (C) -40 to 125 Type Fixed Gain Output swing headroom (to negative supply) (Typ) (V) 0.15 Output swing headroom (to positive supply) (Typ) (V) -0.15 Input common mode headroom (to negative supply) (Typ) (V) 2.5 Input common mode headroom (to positive supply) (Typ) (V) -2.5 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 0.055 Gain non-linearity (+/-) (Max) (%) 0.001
SOIC (D) 8 19 mm² 4.9 x 3.9
  • Fixed gain of 2000 V/V
  • Access to internal nodes for filtering
  • Ultra-low noise: 1.5 nV/√Hz input voltage noise (maximum)
  • Precision super-beta input performance:
    • Low offset voltage: 35 µV (maximum)
    • Low offset voltage drift: 0.45 µV/°C (maximum)
    • Low input bias current: 25 nA (typical)
    • Low gain drift: 5 ppm/°C (maximum)
  • Bandwidth: 2.8 MHz
  • Slew rate: 45 V/µs
  • Common-mode rejection: 132 dB (minimum)
  • Supply range:
    • Single supply: 8 V to 36 V
    • Dual supply: ±4 V to ±18 V
  • Specified temperature range: –40°C to +125°C
  • Package: 8-pin SOIC
  • Fixed gain of 2000 V/V
  • Access to internal nodes for filtering
  • Ultra-low noise: 1.5 nV/√Hz input voltage noise (maximum)
  • Precision super-beta input performance:
    • Low offset voltage: 35 µV (maximum)
    • Low offset voltage drift: 0.45 µV/°C (maximum)
    • Low input bias current: 25 nA (typical)
    • Low gain drift: 5 ppm/°C (maximum)
  • Bandwidth: 2.8 MHz
  • Slew rate: 45 V/µs
  • Common-mode rejection: 132 dB (minimum)
  • Supply range:
    • Single supply: 8 V to 36 V
    • Dual supply: ±4 V to ±18 V
  • Specified temperature range: –40°C to +125°C
  • Package: 8-pin SOIC

The INA848 is a fixed-gain instrumentation amplifier optimized for high-precision measurements, such as very-small, fast, differential input signals. TI’s super-beta topology provides a very low input bias current and current noise. The well-matched transistors help achieve a very low offset and offset drift. Matching of the internal resistors yields a high common-mode rejection ratio of 132 dB across the full input-voltage range, and a very low gain drift error of 5 ppm/⁰C (max).

The current-feedback topology of the INA848 produces a wide bandwidth of 2.8 MHz at a fixed gain of 2000, thereby eliminating the need for subsequent gain stages. The very-low noise floor of 1.3 nV/√Hz minimizes the impact on the equivalent number of bits (ENOB) when interfacing with high-resolution analog-to-digital converters (ADCs). The INA848 provides the flexibility of adding filters between the gain stages (pins 2 and 3) to maintain an adequate signal integrity.

These unique features of the INA848 make this device an excellent choice for applications requiring high-precision measurements, such as high-end medical instrumentation, electroencephalography, vibration sensing, and displacement measurements.

This device is designed for 8-V to 36-V single supplies, or ±4-V to ±18-V on dual supplies.

The INA848 is a fixed-gain instrumentation amplifier optimized for high-precision measurements, such as very-small, fast, differential input signals. TI’s super-beta topology provides a very low input bias current and current noise. The well-matched transistors help achieve a very low offset and offset drift. Matching of the internal resistors yields a high common-mode rejection ratio of 132 dB across the full input-voltage range, and a very low gain drift error of 5 ppm/⁰C (max).

The current-feedback topology of the INA848 produces a wide bandwidth of 2.8 MHz at a fixed gain of 2000, thereby eliminating the need for subsequent gain stages. The very-low noise floor of 1.3 nV/√Hz minimizes the impact on the equivalent number of bits (ENOB) when interfacing with high-resolution analog-to-digital converters (ADCs). The INA848 provides the flexibility of adding filters between the gain stages (pins 2 and 3) to maintain an adequate signal integrity.

These unique features of the INA848 make this device an excellent choice for applications requiring high-precision measurements, such as high-end medical instrumentation, electroencephalography, vibration sensing, and displacement measurements.

This device is designed for 8-V to 36-V single supplies, or ±4-V to ±18-V on dual supplies.

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Technical documentation

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Type Title Date
* Data sheet INA848 Ultra-Low-Noise (1.5 nV/√Hz), High-Bandwidth Instrumentation Amplifier With Fixed Gain of 2000 datasheet 24 Sep 2020
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps 27 Jul 2021
Technical article What is an instrumentation amplifier? 09 Aug 2019
Technical article How to layout a PCB for an instrumentation amplifier 14 Oct 2016
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) 25 Nov 2013

Design & development

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INA848 TINA-TI Spice Model

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INA848 PSpice Model

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INA848 TINA-TI Reference Design

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Simulation tool

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

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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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ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
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