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INA333AIDGKT

Low-Power, Zero-Drift, Precision Instrumentation Amplifier

Manufacturer:

TI
Mfr.Part #:

INA333AIDGKT
Datasheet:

INA333AIDGKT Datasheet (PDF)
Number of channels:

1
Vs (max) (V):

5.5
Vs (min) (V):

1.8
Input offset (±) (max) (µV):

25
EDA/CAD Models:

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INA333AIDGKT General 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 / R_G).

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 T_A = 40°C to +125°C temperature range.

Key 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

Specifications

Number of channels	1	Vs (max) (V)	5.5
Vs (min) (V)	1.8	Input offset (±) (max) (µV)	25
Voltage gain (min) (V/V)	1	Voltage gain (max) (V/V)	1000
Noise at 1 kHz (typ) (nV√Hz)	50	Features	Low power, Small Size, Zero Drift
CMRR (min) (dB)	100	Input offset drift (±) (max) (V/°C)	0.0000001
Input bias current (±) (max) (nA)	0.2	Iq (typ) (mA)	0.05
Bandwidth at min gain (typ) (MHz)	0.15	Gain error (±) (max) (%)	0.25
Operating temperature range (°C)	-40 to 125	Rating	Catalog
Type	Resistor	Gain nonlinearity (±) (max) (%)	0.001
Output swing headroom (to negative supply) (typ) (V)	0.05	Output swing headroom (to positive supply) (typ) (V)	-0.05
Input common mode headroom (to negative supply) (typ) (V)	0.1	Input common mode headroom (to positive supply) (typ) (V)	-0.1
Noise at 0.1 Hz to 10 Hz (typ) (µVPP)	1