Low-Power, Single Supply, CMOS, Instumentation Amplifier - INA331

INA331 (ACTIVE)

Low-Power, Single Supply, CMOS, Instumentation Amplifier

Description

The INA331 and INA2331 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single-supply operation as well as bipolar-supply operation. The INA331 family provides low-cost, low-noise amplification of differential signals with a low quiescent current of 415µA (dropping to 0.01µA when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multi-channel applications.

Configured internally in a gain of 5V/V, the INA331 offers flexibility in higher gains by choosing external resistors.

The INA331 rejects line noise and its harmonics, because common-mode error remains low even at higher frequencies.

High bandwidth and slew rate makes the INA331 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications.

With high precision, low cost, and small packages, the INA331 outperforms discrete designs. They are specified for a wide temperature range of -55°C to +125°C.

Features

  • DESIGNED FOR LOW COST
  • HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
  • GAIN SET WITH EXT. RESISTORS FOR >5V/V
  • LOW OFFSET VOLTAGE: ±250 µV
  • HIGH CMRR: 94dB DC, 50dB at 45kHz
  • LOW BIAS CURRENT: 0.5pA
  • BANDWIDTH, SLEW RATE: 2.0MHz, 5V/µs
  • RAIL-TO-RAIL OUTPUT SWING: (V+)– 0.02V
  • WIDE TEMPERATURE RANGE: –55°C to +125°C
  • LOW QUIESCENT CURRENT: 490 µA max/chan
  • SHUT DOWN: 0.01 µA
  • MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGES
  • APPLICATIONS
    • INDUSTRIAL SENSOR AMPLIFIERS:
        Bridge, RTD, Thermocouple, Position
    • PHYSIOLOGICAL AMPLIFIERS:
        ECG, EEG, EMG
    • A/D CONVERTER SIGNAL CONDITIONING
    • DIFFERENTIAL LINE RECEIVERS WITH GAIN
    • FIELD UTILITY METERS
    • PCMCIA CARDS
    • AUDIO AMPLIFIERS
    • COMMUNICATION SYSTEMS
    • TEST EQUIPMENT
    • AUTOMOTIVE INSTRUMENTATION

All trademarks are the property of their respective owners.

View more

Parametrics Compare all products in Single Supply

 
Number of Channels (#)
Vs (Min) (V)
Vs (Max) (V)
Input Bias Current (+/-) (Max) (nA)
Input Offset Drift (+/-) (Max) (uV/Degrees Celsius)
Noise at 1kHz (Typ) (nV/rt(Hz))
CMRR (Min) (dB)
Non-Linearity (+/-) (Max) (%)
Bandwidth at G=100 (Min) (kHz)
Iq (Typ) (mA)
Input Offset (+/-) (Max) (uV)
Gain (V/V)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
INA331 INA2331
1     2    
2.5     2.5    
5.5     5.5    
0.01     0.01    
5     5    
46     46    
90     90    
0.1     0.1    
2000     2000    
0.415     0.415    
500     500    
5 to 1000     5 to 1000    
Catalog     Catalog    
-55 to 125     -55 to 125    
8VSSOP     14TSSOP    
0.80 | 1ku     1.20 | 1ku    
Click Here