Ultra-low-noise, high-bandwidth instrumentation amplifier with fixed gain of 2000


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 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 0.055 Gain non-linearity (+/-) (Max) (%) 0.001 open-in-new Find other Instrumentation amplifiers

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 open-in-new Find other Instrumentation amplifiers


  • 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
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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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NEW INA849 ACTIVE Ultra-low noise (1 nV/√Hz), high-speed (28 MHz, 35 V/μ), precision (35 μV) instrumentation amplifier Resistor set gain version

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 Sep. 24, 2020
Technical article What is an instrumentation amplifier? Aug. 09, 2019
Technical article How to layout a PCB for an instrumentation amplifier Oct. 14, 2016
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) Nov. 25, 2013

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