INA301
(ACTIVE) Overcurrent protection high-speed, precision current sense amplifier with integrated comparator


Datasheet (733 KB)
 
http://www.ti.com/product/LM139-SP/technicaldocuments

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Descriptionclick to collapse contents 




The INA301 includes both a high common-mode, current-sensing amplifier and a high-speed comparator configured to detect overcurrent conditions through measuring the voltage developed across a current-sensing or current-shunt resistor and comparing that voltage to a defined threshold limit. The device features an adjustable limit threshold range that is set using a single external limit-setting resistor. This current-shunt monitor can measure differential voltage signals on common-mode voltages that can vary from 0 V up to 36 V, independent of the supply voltage. 

The open-drain alert output can be configured to operate in either a transparent mode where the output status follows the input state or in a latched mode where the alert output is cleared when the latch is reset. The device alert response time is under 1 µs, allowing for quick detection of overcurrent events. 

This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 700 µA. The device is specified over the extended operating temperature range (–40°C to +125°C), and is available in an 8-pin VSSOP package.

http://www.ti.com/product/LM139-SP/technicaldocuments
 

Featuresclick to collapse contents 


•Wide Common-Mode Input Range: 0 V to 36 V
•Dual Output: Amplifier and Comparator Output
•High Accuracy Amplifier:?Offset Voltage: 35 µV (Max)
?Offset Voltage Drift: 0.5 µV/°C (Max)
?Gain Error: 0.1% (Max)
?Gain Error Drift: 10 ppm/°C

•Available Amplifier Gains:?INA301A1: 20 V/V
?INA301A2: 50 V/V
?INA301A3: 100 V/V

•Programmable Alert Threshold Set Through a Single Resistor
•Total Alert Response Time: 1 µs
•Open-Drain Output With Latching Mode 
•Package: VSSOP-8