PGA281 Texas instruments

PGA281

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PGA281

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Описание

The PGA281 is a high-precision instrumentation amplifier with a digitally-controllable gain and signal-integrity test capability. This device uses proprietary autozeroing techniques to offer low offset voltage, near-zero offset and gain drift, excellent linearity, and nearly no 1/f noise. The PGA281 is optimized to provide an excellent common-mode rejection of greater than 110 dB (G = 1) over a wide frequency range. Superior common-mode and supply rejection supports high-resolution, precise measurement. The 36-V supply capability and wide, high-impedance input range comply with requirements for universal signal measurement. The PGA281 offers multiple internal gain options from ⅛ V/V (attenuation) to 176 V/V, making this a universal, high-performance, analog front-end suitable for a wide variety of applications. The fully differential, rail-to-rail output is designed to easily interface a wide range of input signals to the low-voltage domain of high-resolution analog-to-digital converters (ADCs). The PGA281 is available in a TSSOP-16 package and is specified over a temperature range of –40°C to +105°C.

Wide Input Range: ±15.5 V at ±18 V Supply
Binary Gain Steps: 128 V/V to 1/8 V/V
Additional Scaling Factor: 1 V/V and 1 3/8 V/V
Low Offset Voltage: 5 µV at G = 128
Near-Zero Long-Term Drift of Offset Voltage
Near-Zero Gain Drift: 0.5 ppm/°C
Excellent Linearity: 1.5 ppm
Excellent CMRR: 140 dB
High Input Impedance
Very Low 1/f Noise
Differential Signal Output
Overload Detection
TSSOP-16 Package

PGA/VGA	PGA
Number of channels	1
BW at Acl (MHz)	6
Vs (max) (V)	36
Vs (min) (V)	10
Acl, min spec gain (V/V)	0.125
Gain (max) (dB)	42
Slew rate (typ) (V/µs)	1
Operating temperature range (°C)	-40 to 125
Rating	Catalog