INA321 Texas instruments

INA321

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INA321

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Описание

The INA321 family is a series of rail-to-rail output, micropower CMOS instrumentation amplifiers that offer wide-range, single-supply, as well as bipolar-supply operation. The INA321 family provides low-cost, low-noise amplification of differential signals with micropower current consumption of 40µA. When shutdown, the INA321 has a quiescent current of less than 1µA. Returning to normal operations within nanoseconds, the shutdown feature makes the INA321 optimal for low-power battery or multiplexing applications. Configured internally for 5V/V gain, the INA321 offers exceptional flexibility with user-programmable external gain resistors. The INA321 reduces common-mode error over frequency and with CMRR remaining high up to 3kHz, line noise and line harmonics are rejected. The low-power design does not compromise on bandwidth or slew rate, making the INA321 ideal for driving sample Analog-to-Digital (A/D) converters as well as general-purpose applications. With high precision, low cost, and small packaging, the INA321 outperforms discrete designs, while offering reliability and performance.

LOW QUIESCENT CURRENT: 40µA/channel Shut Down: < 1µA
HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
GAIN SET WITH EXTERNAL RESISTORS
LOW OFFSET VOLTAGE: ±200µV
HIGH CMRR: 94dB
LOW BIAS CURRENT: 10pA
BANDWIDTH: 500kHz, G = 5V/V
RAIL-TO-RAIL OUTPUT SWING: (V+) - 0.02V
WIDE TEMPERATURE RANGE: -55°C to +125°C
SINGLE VERSION IN MSOP-8 PACKAGE AND DUAL VERSION IN TSSOP-14 PACKAGE
APPLICATIONS
- INDUSTRIAL SENSOR AMPLIFIERS: Bridge, RTD, Thermistor, Position
- PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG
- A/D CONVERTER SIGNAL CONDITIONING
- DIFFERENTIAL LINE RECEIVERS WITH GAIN
- FIELD UTILITY METERS
- PCMCIA CARDS
- COMMUNICATION SYSTEMS
- TEST EQUIPMENT
- AUTOMOTIVE INSTRUMENTATION

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Number of channels	1
Vs (max) (V)	5.5
Vs (min) (V)	2.5
Input offset (±) (max) (µV)	500
Voltage gain (min) (V/V)	5
Voltage gain (max) (V/V)	1000
Noise at 1 kHz (typ) (nV√Hz)	100
Features	Cost Optimized, Shutdown
CMRR (min) (dB)	90
Input bias current (±) (max) (nA)	0.01
Iq (typ) (mA)	0.04
Bandwidth at min gain (typ) (MHz)	0.5
Gain error (±) (max) (%)	0.1
Operating temperature range (°C)	-55 to 125
Rating	Catalog
Type	Resistor
Gain nonlinearity (±) (max) (%)	0.01
Output swing headroom (to negative supply) (typ) (V)	0.025
Output swing headroom (to positive supply) (typ) (V)	-0.025
Input common mode headroom (to negative supply) (typ) (V)	0.55
Input common mode headroom (to positive supply) (typ) (V)	-1.7
Noise at 0.1 Hz to 10 Hz (typ) (µVPP)	20