LTC2914IGN-1#PBF

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The LTC2914IGN#-1PBF is a precision adjustable supervisor with a programmable delay. Its primary application field is as an input voltage supervisor, used to trigger an event when the input voltage crosses an adjustable limit. It is intended mainly for use in mobile phone systems, with applications such as monitoring the charge state of batteries, monitoring system safety conditions, and potentially used as a general purpose voltage monitor.

The LTC2914IGN#-1PBF combines an adjustable voltage detector, a programmable delay block, an active low delay output, an active high delay output, a power-on reset output, and a power fail input. This allows it to be used to detect voltage thresholds, generate alarms or two-step resets on power supply events, and reset systems on low-voltage events.

The LTC2914IGN#-1PBF has a threshold voltage range of 2.6V to 5.8V, with 3.2V typical accuracy. The programmable delay is adjustable from 50µs to 1000s, and the active outputs are guaranteed to be valid for 1000ms after power-on. The power-on reset output and power-fail input are held low for 500ms after power-on for additional system control.

The working principle of the LTC2914IGN#-1PBF is based on its ability to accurately detect voltage levels and generate an active output signal. It uses an internal voltage divider and sense amplifier to detect the threshold voltage, and has a high immunity to any noise on the input. Once the threshold is detected, a small delay is programmed into the device before the output signal is triggered. The delay is adjustable and can be used to ensure any valid signals have time to settle before the output is triggered. Once triggered, the output signal remains active until the power is removed. The power-on reset and power-fail inputs are used to detect and reset the device on power-on, as well as to detect any faults caused by noise or power supply glitches.

The LTC2914IGN#-1PBF is a versatile and useful component for providing voltage monitoring and reset control in mobile phone systems or any other system that requires reliable voltage monitoring. Its adjustable threshold and programmable delay allow it be tailored to the exact needs of the application, making it a popular choice for system supervisors. The device is available in commercial and industrial temperature ranges, and is housed in a miniature 16-pin TSSOP package for easy integration into circuit boards.

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