Linear Technology Corporation introduces a six-channel supply monitor that includes separate open-drain voltage comparator outputs for individual supply monitoring. The LTC2932 is designed for monitoring network servers, telecom and industrial equipment with numerous supply voltage rails.
An external resistive divider between a band gap reference output, an ADC input, and ground determines which of the six channels are set to preset or adjustable voltage monitor inputs, as shown in the voltage threshold selection table below. The preset voltage thresholds are digitally configurable for 5, 7.5, 10 or 12.5 percent supply tolerances below the nominal operating voltage.
The LTC2932 can also be configured to monitor up to four adjustable supplies, with the option for negative voltage monitoring by connecting a resistive divider between the negative supply and buffered reference instead of ground. All six preset or adjustable channels feature ±1.5% (max) threshold accuracy over the entire temperature range.
With guaranteed specifications across the -40°C to +125°C temperature range, the LTC2932 can be used in automotive and military applications. The LTC2932’s reset timeout period can be adjusted using an external capacitor and the reset output is guaranteed to be in the correct state for VCC as low as 1V.
Linear Technology Corporation
www.linear.com