AEC-Q100, -4-V to 110-V, 1.3-MHz current sense amplifier
Product details
Parameters
Package | Pins | Size
Features
- AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40 °C to +125 °C, TA
- Functional Safety-Capable
- Wide common-mode voltage:
- Operational voltage: −4 V to +110 V
- Survival voltage: −20 V to +120 V
- Excellent CMRR:
- 120-dB DC CMRR
- 65-dB AC CMRR at 50 kHz
- Accuracy:
- Gain:
- Gain error: ±0.5% (maximum)
- Gain drift: ±20 ppm/°C (maximum)
- Offset:
- Offset voltage: ±55 µV (typical)
- Offset drift: ±0.1 µV/°C (typical)
- Gain:
- Available gains:
- INA281A1-Q1, INA281B1-Q1 : 20 V/V
- INA281A2-Q1, INA281B2-Q1 : 50 V/V
- INA281A3-Q1, INA281B3-Q1 : 100 V/V
- INA281A4-Q1, INA281B4-Q1 : 200 V/V
- INA281A5-Q1, INA281B5-Q1 : 500 V/V
- High bandwidth: 1.3 MHz
- Slew rate: 2.5V/µs
- Quiescent current: 1.5 mA
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Description
The INA281-Q1 is a high-precision current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from –4 V to 110 V. The negative common-mode voltage allows the device to operate below ground, thus accommodating precise measurement of recirculating currents in half-bridge applications. The combination of a low offset voltage, small gain error and high DC CMRR enables highly accurate current measurement. The INA281-Q1 is not only designed for DC current measurement, but also for high-speed applications (like fast overcurrent protection, for example) with a high bandwidth of 1.3 MHz and an 65-dB AC CMRR (at 50 kHz).
The INA281-Q1 operates from a single 2.7-V to 20-V supply, drawing 1.5 mA of supply current. The INA281-Q1 is available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain options address wide dynamic range for current-sensing applications.
The INA281-Q1 is specified over an operating temperature range of −40 °C to +125 °C and is offered in a space-saving SOT-23 package with two pin-out variants.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | INA281-Q1 AEC-Q100, –4-V to 110-V, 1.3-MHz Current-Sense Amplifier datasheet | Nov. 05, 2020 |
Technical articles | How current-sense amplifiers monitor satellite health | Feb. 08, 2021 | |
Application note | Current Sensing in an H-Bridge (Rev. B) | Feb. 05, 2021 | |
Application note | High-Side Drive, High-Side Solenoid Monitor With PWM Rejection (Rev. C) | Dec. 04, 2020 | |
Functional safety information | INA293-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) | Nov. 05, 2020 | |
Technical articles | A key to accurate system thermal management: monitoring both current flow and temperature | Oct. 04, 2018 | |
Technical articles | System trade-offs for high- and low-side current measurements | Jun. 01, 2017 | |
Technical articles | Why should you care about overcurrent protection in your system? | Jun. 16, 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Easy to test INA281 with differential voltage or shunt resistor.
- Pads and sockets allow quick and easy implementation of SMD filtering.
- Breakable panels lets customer experiment and test with all gain variants and two pin outs.
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
- (...)
Reference designs
Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)
Design files
-
download TIDA-00302 BOM.pdf (52KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOT-23 (DBV) | 5 | 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
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