ultra-low-noise, high-bandwidth instrumentation amplifier with fixed gain of 2000
Product details
Parameters
Package | Pins | Size
Features
- 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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Description
The INA848 is a fixed-gain instrumentation amplifier optimized for high-precision measurements, such as very-small, fast, differential input signals. TIs 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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | 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 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
The Common-Mode Input Range Calculator is pre-loaded (...)
Features
- Preloaded with 20 of TI’s most popular instrumentation amplifier specifications
- Customizable supply, gain, and voltage reference options
- Calculator displays output limitations graphically and numerically
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOIC (D) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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