INA146 Texas instruments

INA146

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INA146

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Описание

The INA146 is a precision difference amplifier that can be used to accurately attenuate high differential voltages and reject high common-mode voltages for compatibility with common signal processing voltage levels. High-voltage capability also affords inherent input protection. The input common-mode range ex-tends beyond both supply rails, making the INA146 well-suited for both single and dual supply applica-tions. On-chip precision resistors are laser-trimmed to achieve accurate gain and high common-mode rejection. Ex-cellent TCR tracking of these resistors assures contin-ued high precision over temperature. A 10:1 difference amplifier provides 0.1V/V gain when the output amplifier is used as a unity-gain buffer. In this configuration, input voltages up to ±100V can be measured. Gains greater than 0.1V/V can be set with an external resistor pair without affect-ing the common-mode input range. The INA146 is available in the SO-8 surface-mount package specified for the extended industrial tempera-ture range, -40°C to +85°C.

HIGH COMMON-MODE VOLTAGE:
- +40V at V S = +5V
- ±100V at V S = ±15V
DIFFERENTIAL GAIN = 0.1V/V TO 100V/V:
- Set with External Resistors
LOW QUIESCENT CURRENT: 570µA
WIDE SUPPLY RANGE:
- Single Supply: 4.5V to 36V
- Dual Supplies: ±2.25V to ±18V
LOW GAIN ERROR: 0.025%
HIGH CMR: 80dB
SO-8 PACKAGE

Number of channels	1
Vs (min) (V)	2.76
Vs (max) (V)	36
CMRR (min) (dB)	76
Common-mode input low (min) (V)	-100
Common-mode input high (max) (V)	100
Input offset (±) (max) (V)	0.005
Iq (typ) (mA)	0.6
Slew rate (typ) (V/µs)	0.45
Voltage gain (min) (V/V)	0.1
Voltage gain (max) (V/V)	100
Small-signal bandwidth (typ) (Hz)	500000
Rating	Catalog
Operating temperature range (°C)	-40 to 85
Gain drift (max) (ppm/°C)	1
Gain error (±) (max) (%)	0.1