Dual-channel, 2.7-V to 120-V, 1.1-MHz, ultra-precise current sense amplifier
Product details
Parameters
Package | Pins | Size
Features
- Wide common-mode voltage:
- Operational voltage: 2.7 V to 120 V
- Survival voltage: −20 V to +122 V
- Excellent CMRR:
- 160-dB DC
- 85-dB AC at 50 kHz
- Accuracy
- Gain:
- Gain error: ±0.1% (maximum)
- Gain drift: ±5 ppm/°C (maximum)
- Offset:
- Offset voltage: ±12 µV (maximum)
- Offset drift: ±0.2 µV/°C (maximum)
- Gain:
- Available gains:
- A1 devices: 20 V/V
- A2 devices: 50 V/V
- A3 devices: 100 V/V
- A4 devices: 200 V/V
- A5 devices: 500 V/V
- High bandwidth: 1.1 MHz
- Slew rate: 2 V/µs
- Quiescent current: 370 µA(per channel)
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Description
The INAx290 is an ultra-precise current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from 2.7 V to 120 V. The ultra-precise current measurement accuracy is achieved thanks to the combination of an ultra-low offset voltage of ±12 µV (maximum), a small gain error of ±0.1% (maximum), and a high DC CMRR of 160 dB (typical). The INAx290 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 1.1 MHz (at gain of 20 V/V) and an 85-dB AC CMRR (at 50 kHz).
The INAx290 provides the capability to make ultra- precise current measurements by sensing the voltage drop across a shunt resistor over a wide common- mode range from 2.7 V to 120 V. The INAx290 devices come in highly space-efficient packages. The single channel INA290 device is featured in the SC-70 package while the dual channel INA2290 device is available in the VSSOP-8 package.
The INAx290 operates from a single 2.7-V to 20-V supply with the single channel device only drawing 370-µA supply current per channel (typical). The devices are available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The low offset of the zero-drift architecture enables current sensing with low ohmic shunts as specified over the extended operating temperature range (−40 °C to +125 °C).
Similar but not functionally equivalent to the compared device:
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | INAx290 2.7-V to 120-V, 1.1-MHz, Ultra-Precise Current Sense Amplifier datasheet (Rev. B) | Dec. 09, 2020 |
Technical article | How current-sense amplifiers monitor satellite health | Feb. 08, 2021 | |
Application note | Current Sensing Applications in Communication Infrastructure Equipment (Rev. A) | Dec. 29, 2020 | |
Application note | Improving Power Amplifier Efficiency with Current Monitors (Rev. A) | Dec. 29, 2020 | |
User guide | INA2290EVM User's Guide (Rev. A) | Dec. 17, 2020 | |
More literature | INA2290EVM EU RoHS Declaration of Conformity (DoC) (Rev. A) | Dec. 02, 2020 | |
Technical article | How current sensors help monitor and protect the world’s wireless infrastructure | Dec. 30, 2019 | |
Technical article | A key to accurate system thermal management: monitoring both current flow and temperature | Oct. 04, 2018 | |
Technical article | System trade-offs for high- and low-side current measurements | Jun. 01, 2017 |
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 INA2290 with differential voltage or shunt resistor.
- Pads and sockets allow quick and easy implementation of SMD filtering.
- Breakable panels allow customer experiment and test with all gain variants.
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
- (...)
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
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