Automotive low-power, zero-drift, precision instrumentation amplifier
Product details
Parameters
Package | Pins | Size
Features
- 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
All trademarks are the property of their respective owners.
Description
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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | INA333-Q1 Automotive, Zerø-Drift, micro-Power, Instrumentation Amplifier datasheet (Rev. A) | May 21, 2020 |
Technical articles | What is an instrumentation amplifier? | Aug. 09, 2019 | |
Technical articles | How to layout a PCB for an instrumentation amplifier | Oct. 14, 2016 | |
Technical articles | Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) | Nov. 25, 2013 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The universal INAEVM (Instrumentation Amplifier Evaluation Module) is available in two package options that simplify prototyping precision instrumentation amplifiers in either the SO-8 (D) package or the MSOP-8(DGK) package with the pinout shown. See the chart below for compatible TI INA’s. Note (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
The Common-Mode Input Range Calculator is pre-loaded (...)
Features
- Preloaded with 20 of TI’s most popular instrumentation amplifier specifications
- Customizable supply, gain, and voltage reference options
- Calculator displays output limitations graphically and numerically
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VSSOP (DGK) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.