Product details

Number of channels (#) 1 Vs (Max) (V) 5.5 Vs (Min) (V) 1.8 Input offset (+/-) (Max) (uV) 25 Gain (Min) (V/V) 1 Gain (Max) (V/V) 1000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 50 Features Zero Drift, Low power CMRR (Min) (dB) 96 Input offset drift (+/-) (Max) (uV/C) 0.1 Input bias current (+/-) (Max) (nA) 0.28 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 Type Resistor 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-10 Hz (Typ) (uVpp) 1 Gain non-linearity (+/-) (Max) (%) 0.001
Number of channels (#) 1 Vs (Max) (V) 5.5 Vs (Min) (V) 1.8 Input offset (+/-) (Max) (uV) 25 Gain (Min) (V/V) 1 Gain (Max) (V/V) 1000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 50 Features Zero Drift, Low power CMRR (Min) (dB) 96 Input offset drift (+/-) (Max) (uV/C) 0.1 Input bias current (+/-) (Max) (nA) 0.28 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 Type Resistor 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-10 Hz (Typ) (uVpp) 1 Gain non-linearity (+/-) (Max) (%) 0.001
VSSOP (DGK) 8 15 mm² 3 x 4.9
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C ≤ TA ≤ +125°C
  • 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: 96 dB (minimum), G ≥ 10
  • Low input bias current: 280 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
  • Package: 8-Pin VSSOP
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C ≤ TA ≤ +125°C
  • 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: 96 dB (minimum), G ≥ 10
  • Low input bias current: 280 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
  • Package: 8-Pin VSSOP

The INA333-Q1 is a low-power, precision instrumentation amplifier offering excellent accuracy. The three-op-amp design, small size, and low power make this device an excellent choice for automotive applications that require precise measurements, such as current leakage detection. This device is also a great choice for applications that use resistive bridge sensors.

A single external resistor sets any gain from 1 to 1000. The INA333-Q1 is designed to use an industry-standard gain equation: G = 1 + (100 kΩ / RG).

The INA333-Q1 provides very low offset voltage (25 µV, G ≥ 100), excellent offset voltage drift (0.1 µV/°C, G ≥ 100), and high common-mode rejection (96 dB at G ≥ 10). The device operates with power supplies as low as 1.8 V (±0.9 V), and quiescent current is only 50 µA. Auto-calibration techniques maintain excellent precision over the automotive temperature range. The INA333-Q1 provides a very low peak-to-peak noise of 1 µV.

The INA333-Q1 device is available in an 8-pin VSSOP package and is specified over the TA = –40°C to +125°C temperature range.

 

The INA333-Q1 is a low-power, precision instrumentation amplifier offering excellent accuracy. The three-op-amp design, small size, and low power make this device an excellent choice for automotive applications that require precise measurements, such as current leakage detection. This device is also a great choice for applications that use resistive bridge sensors.

A single external resistor sets any gain from 1 to 1000. The INA333-Q1 is designed to use an industry-standard gain equation: G = 1 + (100 kΩ / RG).

The INA333-Q1 provides very low offset voltage (25 µV, G ≥ 100), excellent offset voltage drift (0.1 µV/°C, G ≥ 100), and high common-mode rejection (96 dB at G ≥ 10). The device operates with power supplies as low as 1.8 V (±0.9 V), and quiescent current is only 50 µA. Auto-calibration techniques maintain excellent precision over the automotive temperature range. The INA333-Q1 provides a very low peak-to-peak noise of 1 µV.

The INA333-Q1 device is available in an 8-pin VSSOP package and is specified over the TA = –40°C to +125°C temperature range.

 

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Type Title Date
* Data sheet INA333-Q1 Automotive, Zerø-Drift, micro-Power, Instrumentation Amplifier datasheet (Rev. A) 21 May 2020
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps 27 Jul 2021
Technical article What is an instrumentation amplifier? 09 Aug 2019
Technical article How to layout a PCB for an instrumentation amplifier 14 Oct 2016
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) 25 Nov 2013

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