INA322：Micropower Single-Supply CMOS Instrumentation Amplifier
The INA322 family is a series of low cost, rail-to-rail output, micropower CMOS instrumentation amplifiers that offer wide-range, single-supply, as well as bipolar-supply operation. The INA322 family provides low-cost, low-noise amplification of differential signals with micropower current consumption of 40?A. When shutdown the INA322 has a quiescent current of less than 1?A. Returning to normal operations within nanoseconds, the shutdown feature makes the INA322 optimal for low-power battery or multiplexing applications.
Configured internally for 5V/V gain, the INA322 offers exceptional flexibility with user-programmable external gain resistors. The INA322 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 INA322 ideal for driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications. With high precision, low cost, and small packaging, the INA322 outperforms discrete designs, while offering reliability and performance.
Features
- LOW COST
- LOW QUIESCENT CURRENT: 40?A/channel
Shut Down: < 1?A - HIGH GAIN ACCURACY: G = 5, 0.07%, 2ppm/°C
- GAIN SET WITH EXTERNAL RESISTORS
- 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
- 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
Parametrics
| key | INA322 |
|---|
| Number of Channels
(#) | 1 |
| Vs
(Min)
(V) | 2.5 |
| Vs
(Max)
(V) | 5.5 |
| CMRR
(Min)
(dB) | 60 |
| Input Offset (+/-)
(Max)
(uV) | 10000 |
| Input Offset Drift (+/-)
(Max)
(uV/C) | 7 |
| Input Bias Current (+/-)
(Max)
(nA) | 0.01 |
| Noise at 1kHz
(Typ)
(nV/rt(Hz)) | 100 |
| Iq
(Typ)
(mA) | 0.04 |
| Bandwidth at Min Gain
(Typ)
(MHz) | 0.5 |
| Gain
(Min)
(V/V) | 5 |
| Gain
(Max)
(V/V) | 1000 |
| Gain Error (+/-)
(Max)
(%) | 0.4 |
| Rating | Catalog |
| Operating Temperature Range
(C) | -55 to 125 |
| Package Group | VSSOP |
| Approx. Price (US$) | 0.95 | 1ku |
| Package Size: mm2:W x L (PKG) | 8VSSOP: 15 mm2: 4.9 x 3(VSSOP) |
| Noise at 0.1 Hz - 10 Hz
(Typ)
(uVpp) | 20 |
| Gain Non-Linearity (+/-)
(Max)
(%) | 0.01 |
Datasheet?(1)
Selection & solution guides?(1)
Models?(3)
Development tools?(2)
Ordering Information
| Part # | Preproduction / Production Material | Status | Temp(oC) | Price | QTY | Package | Pins | Device Marking | Package QTY | Carrier |
|---|
| INA322EA/250 | Production | ACTIVE | -55 to 125 | 1.10 | 1ku | VSSOP?(DGK) | C22 | 250 | SMALL T&R |
| INA322EA/250G4 | Production | ACTIVE | -55 to 125 | 1.10 | 1ku | VSSOP?(DGK) | C22 | 250 | SMALL T&R |
| INA322EA/2K5 | Production | ACTIVE | -55 to 125 | 0.95 | 1ku | VSSOP?(DGK) | C22 | 2500 | LARGE T&R |
