INA188 Texas instruments

INA188

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INA188

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Описание

The INA188 is a precision instrumentation amplifier that uses TI proprietary auto-zeroing techniques to achieve low offset voltage, near-zero offset and gain drift, excellent linearity, and exceptionally low-noise density (12 nV/√Hz) that extends down to dc. The INA188 is optimized to provide excellent common-mode rejection of greater than 104 dB (G ≥ 10). Superior common-mode and supply rejection supports high-resolution, precise measurement applications. The versatile three op-amp design offers a rail-to-rail output, low-voltage operation from a 4-V single supply as well as dual supplies up to ±18 V, and a wide, high-impedance input range. These specifications make this device ideal for universal signal measurement and sensor conditioning (such as temperature or bridge applications). A single external resistor sets any gain from 1 to 1000. The INA188 is designed to use an industry-standard gain equation: G = 1 + (50 kΩ / RG). The reference pin can be used for level-shifting in single-supply operation or for an offset calibration. The INA188 is specified over the temperature range of –40°C to +125°C .

Excellent DC Performance:
- Low Input Offset Voltage: 55 µV (max)
- Low Input Offset Drift: 0.2 µV/°C (max)
- High CMRR: 104 dB, G ≥ 10 (min)
Low Input Noise:
- 12 nV/√Hz at 1 kHz
- 0.25 µV_PP (0.1 Hz to 10 Hz)
Wide Supply Range:
- Single Supply: 4 V to 36 V
- Dual Supply: ±2 V to ±18 V
Gain Set with a Single External Resistor:
- Gain Equation: G = 1 + (50 kΩ / R_G)
- Gain Error: 0.007%, G = 1
- Gain Drift: 5 ppm/°C (max) G = 1
Input Voltage: (V–) + 0.1 V to (V+) – 1.5 V
RFI-Filtered Inputs
Rail-to-Rail Output
Low Quiescent Current: 1.4 mA
Operating Temperature: –55°C to +150°C
SOIC-8 and DFN-8 Packages

Number of channels	1
Vs (max) (V)	36
Vs (min) (V)	4
Input offset (±) (max) (µV)	55
Voltage gain (min) (V/V)	1
Voltage gain (max) (V/V)	1000
Noise at 1 kHz (typ) (nV√Hz)	12.5
Features	Small Size, Zero Drift
CMRR (min) (dB)	118
Input offset drift (±) (max) (V/°C)	0.0000002
Input bias current (±) (max) (nA)	2.5
Iq (typ) (mA)	1.4
Bandwidth at min gain (typ) (MHz)	0.6
Gain error (±) (max) (%)	0.2
Operating temperature range (°C)	-40 to 125
Rating	Catalog
Type	Resistor
Output swing headroom (to negative supply) (typ) (V)	0.22
Output swing headroom (to positive supply) (typ) (V)	-0.22
Input common mode headroom (to negative supply) (typ) (V)	0.1
Input common mode headroom (to positive supply) (typ) (V)	-1.5
Noise at 0.1 Hz to 10 Hz (typ) (µVPP)	0.25