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INA333-Q1

ACTIVE

Automotive low-power, zero-drift, precision instrumentation amplifier

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Data sheet

INA333-Q1

ACTIVE
Data sheet Order now

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 TI functional safety category Functional Safety-Capable 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 TI functional safety category Functional Safety-Capable 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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Technical documentation

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Type Title Date
* Data sheet INA333-Q1 Automotive, Zerø-Drift, micro-Power, Instrumentation Amplifier datasheet (Rev. A) PDF | HTML 21 May 2020
Functional safety information INA333-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 14 Jul 2022
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML 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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