2.7 to 120V, 1.1MHz, ultra-precise current sense amplifier in small (SC-70) package
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).
Same functionality and pinout but is not an equivalent to the compared device:
Similar but not functionally equivalent to the compared device:
Technical documentation
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 INA290 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.
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
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download TIDA-00302 BOM.pdf (52KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SC70 (DCK) | 5 | View options |
Ordering & quality
- RoHS
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- Device marking
- Lead finish/Ball material
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- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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