Texas Instruments INA848ID
- Part Number:
- INA848ID
- Manufacturer:
- Texas Instruments
- Ventron No:
- 6374666-INA848ID
- Description:
- Ultra-low-noise, high-bandwidth instrumentation amplifier with fixed gain of 2000
- Datasheet:
- ina848
- Number of channels1
- Vs (max) (V)36
- Vs (min) (V)8
- Input offset (±) (max) (μV)35
- Voltage gain (min) (V/V)2000
- Voltage gain (max) (V/V)2000
- Noise at 1 kHz (typ) (nV√Hz)1.5
- FeaturesCurrent Feedback
- CMRR (min) (dB)132
- Input offset drift (±) (max) (V/°C)0.00000045
- Input bias current (±) (max) (nA)50
- Iq (typ) (mA)6.2
- Bandwidth at min gain (typ) (MHz)2.8
- Operating temperature range (°C)-40 to 125
- RatingCatalog
- TypeFixed 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 to 10 Hz (typ) (μVPP)0.055
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/?C (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.
-
ImagePart NumberManufacturerNumber of channelsVs (max) (V)Vs (min) (V)Input offset (±) (max) (μV)Voltage gain (min) (V/V)Voltage gain (max) (V/V)Noise at 1 kHz (typ) (nV√Hz)FeaturesCMRR (min) (dB)Input offset drift (±) (max) (V/°C)Input bias current (±) (max) (nA)Iq (typ) (mA)Bandwidth at min gain (typ) (MHz)Operating temperature range (°C)RatingTypeOutput swing headroom (to negative supply) (typ) (V)Output swing headroom (to positive supply) (typ) (V)Input common mode headroom (to negative supply) (typ) (V)Input common mode headroom (to positive supply) (typ) (V)Noise at 0.1 Hz to 10 Hz (typ) (μVPP)View Compare
-
INA848ID136835200020001.5Current Feedback1320.00000045506.22.8-40 to 125CatalogFixed Gain0.15-0.152.5-2.50.055-
-
1368351100001Current Feedback1200.0000004206.228-40 to 125CatalogResistor0.15-0.152.5-2.50.06
-
1364.550110007Overvoltage protection1400.00000050.60.62-40 to 125CatalogResistor0.15-0.152-20.14
-
13631501100018Cost Optimized1200.000002650.21-40 to 125CatalogResistor0.1-0.150-10.52
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