Accurate supervisors target very low voltage components

10th September 2018

Analog Devices

Lanna Deamer

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Datasheet

Analog Devices has announced the Power by Linear LTC2962-LTC2964 family of accurate 4-channel voltage supervisors for increased system voltage margin and enhanced reliability. ASIC, FPGA, DSP, MCU and MPU architectures that operate from supplies as low as 1V cannot utilise traditional 1-2% accurate voltage supervisors without shedding valuable system voltage margin and shrinking the remaining load operating voltage range.

The LTC2962 family possesses a ±0.5% reset threshold accuracy, which relaxes power supply demands, increases system tolerance to transients, and enabling a lower nominal supply to dramatically reduce power consumption.

The LTC2962 family fulfills many network, telecom and automotive requirements with its high accuracy, flexible 1-5V (or adjustable) reset thresholds, and wide operating temperature range.

A feature set differentiates the LTC2962 family in the low power voltage monitor market, making it a suitable choice for many multi-rail applications.

For each channel, one of 16 preset or adjustable, ±0.5% accurate, voltage thresholds can be easily selected for undervoltage, overvoltage or negative monitoring.

The supervisory circuits monitor inputs and drive the outputs according to the configured thresholds. Alternatively, a manual reset input is also available for optional use of a pushbutton switch to force a system reset. Ordering options include a watchdog with adjustable timers (LTC2963-1) and individual comparator open-drain outputs for each channel (LTC2964). An adjustable timeout period is available on all devices.

The LTC2962 family is available today in multiple temperature grades: 0°C to 70°C (C grade), -40°C to 85°C (I grade), and -40°C to 125°C (H grade).

The LTC2962 is available in a 16-lead 3x3mm QFN, while the LTC2963-1 and LTC2964 are available in a 20-lead 3x4mm QFN.