26V, bi-directional, 350kHz current sense amplifier
Product details
Parameters
Package | Pins | Size
Features
- Common-mode range (VCM): –0.2 V to +26 V
- High bandwidth: 350 kHz (A1 devices)
- Offset voltage:
- ±150 µV (maximum) at VCM = 0 V
- ±500 µV (maximum) at VCM = 12 V
- Output slew rate: 2 V/µs
- Bidirectional current-sensing capability
- Accuracy:
- ±1% gain error (maximum)
- 1-µV/°C offset drift (maximum)
- Gain options:
- 20 V/V (A1 devices)
- 50 V/V (A2 devices)
- 100 V/V (A3 devices)
- 200 V/V (A4 devices)
- Quiescent current: 260 µA maximum (INA181)
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Description
The INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for cost-optimized applications. These devices are part of a family of bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent of the supply voltage. The INAx181 family integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift.
These devices operate from a single 2.7-V to 5.5-V power supply. The single-channel INA181 draws a maximum supply current of 260 µA; whereas, the dual-channel INA2181 draws a maximum supply current of 500 µA, and the quad-channel INA4181 draws a maximum supply current of 900 µA.
The INA181 is available in a 6-pin, SOT-23 package. The INA2181 is available in 10-pin, VSSOP and WSON packages. The INA4181 is available in a 20-pin, TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C.
Same functionality but is not pin-for-pin or parametrically 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
- Evaluation of all gain options for the INA180Ax and INA181Ax
- Ease of access to device pins with test points
- Capability to evaluate high-side and low-side configurations
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
Design files
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download TIDA-010015 BOM.pdf (116KB) -
download TIDA-010015 Assembly Drawing.pdf (348KB) -
download TIDA-010015 PCB.pdf (1379KB) -
download TIDA-010015 CAD Files.zip (3060KB) -
download TIDA-010015 Gerber.zip (1752KB)
Design files
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download PMP30763 BOM.pdf (149KB) -
download PMP30763 Assembly Drawing.pdf (370KB) -
download PMP30763 PCB.pdf (1598KB) -
download PMP30763 CAD Files.zip (3324KB) -
download PMP30763 Gerber.zip (856KB)
Design files
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download PMP30693 BOM.pdf (28KB) -
download PMP30693 Assembly Drawing.pdf (298KB) -
download PMP30693 PCB.pdf (376KB) -
download PMP30693 CAD Files.zip (560KB) -
download PMP30693 Gerber.zip (1024KB)
Design files
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download TIDA-01292 BOM.pdf (103KB) -
download TIDA-01292 Assembly Drawing.pdf (238KB) -
download TIDA-01292 PCB.pdf (2041KB) -
download TIDA-01292 CAD Files.zip (2509KB) -
download TIDA-01292 Gerber.zip (453KB)
Design files
-
download PMP40496 Assembly Drawing.pdf (322KB) -
download PMP40496 PCB.pdf (1341KB) -
download PMP40496 Gerber.zip (1242KB) -
download PMP40496 BOM (Rev. A).pdf (102KB) -
download PMP40496 CAD Files (Rev. A).zip (2510KB)
Design files
-
download TIDA-01494 Assembly Drawing.pdf (351KB) -
download TIDA-01494 PCB.pdf (1490KB) -
download TIDA-01494 Gerber.zip (877KB) -
download TIDA-01494 BOM (Rev. A).pdf (117KB) -
download TIDA-01494 CAD Files (Rev. A).zip (2004KB)
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) | 6 | 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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