Four-channel supervisors boast best-in-class reset accuracy
Four-channel voltage supervisors from Analog Devices provide increased system voltage margin and enhanced reliability for multi-rail applications.
The Power by Linear supervisors (LTC2962, LTC2963 and LTC2964) are claimed to have best-in-class ±0.5 per cent reset threshold accuracy, which relaxes power supply demands, increases system tolerance to transients, and enabling a lower nominal supply to dramatically reduce power consumption, says Analog Devices.
ASIC, FPGA, DSP, MCU and MPU architectures that operate from supplies as low as 1.0V cannot use traditional one to two per cent accurate voltage supervisors without shedding valuable system voltage margin and shrinking the remaining load operating voltage range. The reset threshold accuracy relaxes power supply demands, increases system tolerance to transients, and enables a lower nominal supply to dramatically reduce power consumption, adds Analog Devices. The LTC2962 family also has a wide operating temperature range, making the supervisors suitable for use in many network, telecomms and automotive requirements.
For many multi-rail applications, one of 16 preset or adjustable, ±0.5 per cent accurate per channel, voltage thresholds can be selected for under-voltage, over-voltage or negative monitoring. The supervisory circuits monitor inputs and drive the outputs according to the configured thresholds. A manual reset input is also available for the 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 the following temperature grades: 0 to +70 degrees C (C grade), -40 to +85 degrees C (I grade), and -40 to +125 degrees C (H grade).
The LTC2962 is available in a 16-lead 3.0 x 3.0mm QFN; the LTC2963-1 and LTC2964 are available in a 20-lead 3.0 x 4.0mm QFN.