INA821 Texas instruments

INA821

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INA821

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Описание

The INA821 is a high-precision instrumentation amplifier that offers low power consumption and operates over a wide single-supply or dual-supply range. A single external resistor sets any gain from 1 to 10,000. The device has high precision as a result of super-beta input transistors, which provide low input offset voltage, offset voltage drift, input bias current, and input voltage and current noise. Additional circuitry protects the inputs against overvoltage up to ±40 V.The INA821 is optimized to provide a high common-mode rejection ratio. At G = 1, the common-mode rejection ratio exceeds 92 dB across the full input common-mode range. The device is designed for low-voltage operation from a 4.5-V single supply, and dual supplies up to ±18 V.The INA821 is available in 8-pin SOIC, VSSOP, and WSON packages, and is specified over the –40°C to +125°C temperature range.

Low offset voltage: 10 µV (typ), 35 µV (max)
Gain drift: 5 ppm/°C (G = 1),
35 ppm/°C (G > 1) (max)
Noise: 7 nV/√Hz
Bandwidth: 4.7 MHz (G = 1), 290 kHz (G = 100)
Stable with 1-nF capacitive loads
Inputs protected up to ±40 V
Common-mode rejection: 112 dB, G = 10 (min)
Power supply rejection: 110 dB, G = 1 (min)
Supply current: 650 µA (max)
Supply range:
- Single-supply: 4.5 V to 36 V
- Dual-supply: ±2.25 V to ±18 V
Specified temperature range: –40°C to +125°C
Packages: 8-pin SOIC, VSSOP, and WSON

Number of channels	1
Vs (max) (V)	36
Vs (min) (V)	4.5
Input offset (±) (max) (µV)	35
Voltage gain (min) (V/V)	1
Voltage gain (max) (V/V)	10000
Noise at 1 kHz (typ) (nV√Hz)	7
Features	Overvoltage protection, Small Size, Super-beta
CMRR (min) (dB)	136
Input offset drift (±) (max) (V/°C)	0.0000004
Input bias current (±) (max) (nA)	0.5
Iq (typ) (mA)	0.6
Bandwidth at min gain (typ) (MHz)	4.7
Gain error (±) (max) (%)	0.15
Operating temperature range (°C)	-40 to 125
Rating	Catalog
Type	Resistor
Gain nonlinearity (±) (max) (%)	0.0015
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
Input common mode headroom (to positive supply) (typ) (V)	-2
Noise at 0.1 Hz to 10 Hz (typ) (µVPP)	0.14