The INA301-Q1 includes both a high common-mode, current-sensing amplifier and a high-speed comparator configured to provide overcurrent protection by measuring the voltage developed across a current-sensing or current-shunt resistor and comparing that voltage to a defined threshold limit. This device features an adjustable limit-threshold range that is set using a single external limit-setting resistor. This current-shunt monitor measures 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 of –40°C to +125°C, and is available in an 8-pin VSSOP package.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
INA301-Q1 | VSSOP (8) | 3.00 mm × 3.00 mm |
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | VS | Analog | Power supply, 2.7 V to 5.5 V |
2 | OUT | Analog output | Output voltage |
3 | LIMIT | Analog input | Alert threshold limit input; see the Section 7.3.2 section for details on setting the limit threshold. |
4 | GND | Analog | Ground |
5 | RESET | Digital input | Transparent or latch mode selection input |
6 | ALERT | Digital output | Overlimit alert, active-low, open-drain output |
7 | IN– | Analog input | Negative voltage input. Connect to load side of the shunt resistor. |
8 | IN+ | Analog input | Positive voltage input. Connect to supply side of the shunt resistor. |