INA333 Low-Power, Zero-Drift, Precision Instrumentation Amplifier | TI.com

INA333 (ACTIVE)

Low-Power, Zero-Drift, Precision Instrumentation Amplifier

 

Description

The INA333 device is a low-power, precision instrumentation amplifier offering excellent accuracy. The versatile 3-operational amplifier design, small size, and low power make it ideal for a wide range of portable applications.

A single external resistor sets any gain from 1 to 1000. The INA333 is designed to use an industry-standard gain equation: G = 1 + (100 kΩ / RG).

The INA333 device provides very low offset voltage (25 µV, G ≥ 100), excellent offset voltage drift (0.1 µV/°C, G ≥ 100), and high common-mode rejection (100 dB at G ≥ 10). It operates with power supplies as low as 1.8 V (±0.9 V) and quiescent current is only 50 µA, making it ideal for battery-operated systems. Using autocalibration techniques to ensure excellent precision over the extended industrial temperature range, the INA333 device also offers exceptionally low noise density (50 nV/√Hz) that extends down to DC.

The INA333 device is available in both 8-pin VSSOP and WSON surface-mount packages and is specified over the TA = –40°C to +125°C temperature range.

Features

  • Low Offset Voltage: 25 µV (Maximum), G ≥ 100
  • Low Drift: 0.1 µV/°C, G ≥ 100
  • Low Noise: 50 nV/√Hz, G ≥ 100
  • High CMRR: 100 dB (Minimum), G ≥ 10
  • Low Input Bias Current: 200 pA (Maximum)
  • Supply Range: 1.8 V to 5.5 V
  • Input Voltage: (V–) +0.1 V to (V+) –0.1 V
  • Output Range: (V–) +0.05 V to (V+) –0.05 V
  • Low Quiescent Current: 50 µA
  • Operating Temperature: –40°C to +125°C
  • RFI Filtered Inputs
  • 8-Pin VSSOP and 8-Pin WSON Packages

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Parametrics Compare all products in Instrumentation amplifiers

 
Number of channels (#)
Vs (Min) (V)
Vs (Max) (V)
CMRR (Min) (dB)
Input offset (+/-) (Max) (uV)
Input offset drift (+/-) (Max) (uV/C)
Input bias current (+/-) (Max) (nA)
Noise at 1 kHz (Typ) (nV/rt (Hz))
Iq (Typ) (mA)
Bandwidth at min gain (Typ) (MHz)
Gain (Min) (V/V)
Gain (Max) (V/V)
Gain error (+/-) (Max) (%)
Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
Noise at 0.1 Hz-10 Hz (Typ) (uVpp)
INA333
1    
1.8    
5.5    
100    
25    
0.1    
0.2    
50    
0.05    
0.15    
1    
1000    
0.5    
-40 to 125    
SON | 8
VSSOP | 8    
See datasheet (SON)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
1