Features: ` LOW QUIESCENT CURRENT: 40A/channel Shut Down: < 1A
` HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/
` GAIN SET WITH EXTERNAL RESISTORS
` LOW OFFSET VOLTAGE: ±200V
` HIGH CMRR: 94dB
` LOW BIAS CURRENT: 10pA
` BANDWIDTH: 500kHz, G = 5V/V
` RAIL-TO-RAIL OUTPUT SWING: (V+) − 0.02V
` WIDE TEMPERATURE RANGE: −55 to +125
` SINGLE VERSION IN MSOP-8 PACKAGE AND DUAL VERSION IN TSSOP-14 PACKAGEApplication· 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 INSTRUMENTATIONPinout
SpecificationsSupply Voltage, V+ to V− . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5V
Signal Input Terminals Voltage(2) . . . (V−) − (0.5V) to (V+) + (0.5V)
Current(2) . . . . . . . . . . . . . . . . . . . . . 10mA
Output Short-Circuit(3) . . . . . . . . . . . . . . . . . . . . . . . . .. Continuous
Operating Temperature . . . . . . . . . . . . . . . . . . . . . −65 to +150
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . .−65 to +150
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150
Lead Temperature (soldering, 10s) . . . . . . . . . . . . . . . . . . . +300
(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not supported.
(2) Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.5V beyond the supply rails should be current limited to 10mA or less.
(3) Short-circuit to ground, one amplifier per package.
DescriptionThe 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 40A. When shutdown, the INA321 has a quiescent current of less than 1A. 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.
INA321 Data Sheet
