36V, bi-directional current sense amplifier w/ four pin-selectable gain settings
Product details
Parameters
Package | Pins | Size
Features
- Wide Common-Mode Range: 0 V to 36 V
- Offset Voltage: ±150 µV (Max, All Gains)
- Offset Voltage Drift: 0.5 µV/°C (Max)
- Gain Accuracy, Over Temperature (Max):
- 25 V/V, 50 V/V: ±0.15%
- 100 V/V: ±0.2%
- 200 V/V: ±0.3%
- 10-ppm/°C Gain Drift
- 250-kHz Bandwidth (Gain = 25 V/V)
- Programmable Gains:
- G1 = 25 V/V
- G2 = 50 V/V
- G3 = 100 V/V
- G4 = 200 V/V
- Quiescent Current: 350 µA (Max)
- Package: MSOP-8
Description
The INA225 is a voltage-output, current-sense amplifier that senses drops across current-sensing resistors at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, current-shunt monitor that allows an external reference to be used to measure current flowing in both directions across a current-sensing resistor.
Four discrete gain levels are selectable using the two gain-select terminals (GS0 and GS1) to program gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V. The low-offset, zero-drift architecture and precision gain values enable current-sensing with maximum drops across the shunt as low as 10 mV of full-scale while maintaining very high accuracy measurements over the entire operating temperature range.
The device operates from a single +2.7-V to +36-V power supply, drawing a maximum of 350 µA of supply current. The device is specified over the extended operating temperature range (–40°C to +125°C), and is offered in an MSOP-8 package.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The INA225 is a voltage output current-shunt monitor that senses drops across shunts at common-mode voltages from 0V to 36V, independent of the supply voltage. The four gain versions are selectable using the 2 external gain select pins, GS0 and GS1. These pins allow a gain of 25, 50, 100, and 200 to (...)
Features
- Jumper selectable Gain (25,50,100,200)
- Optional input filter
- Allows for the INA225 to be used in both unidirectional and bidirectional applications
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-00440 BOM.pdf (68KB) -
download TIDA-00440 Assembly Files.zip (248KB) -
download TIDA-00440 PCB.zip (288KB) -
download TIDA-00440 CAD Files.zip (6588KB) -
download TIDA-00440 Gerber.zip (897KB)
Design files
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download PMP40182 BOM.pdf (67KB) -
download PMP40182 Assembly Drawing.pdf (309KB) -
download PMP40182 PCB.pdf (1584KB) -
download PMP40182 CAD Files.zip (26KB) -
download PMP40182 Gerber.zip (412KB)
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)
Design files
-
download TIDA-00328 BOM.pdf (79KB) -
download TIDA-00328 Altium.zip (19554KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VSSOP (DGK) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
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- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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