Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Reset threshold | 2.93 V for ADM706S |
| Reset output | Active low |
| Reset pulse width | 200 ms |
| Watchdog timeout | 1.6 s |
| Manual reset | Debounced active-low MR input |
| Power-fail comparator | 1.25 V threshold detector |
| RESET validity | Guaranteed with VCC down to 1 V |
| Package | 8-lead SOIC_N, R-8 |
| Operating temperature | −40°C to +85°C |
Product Overview
ADM706SARZ-REEL is the 2.93 V threshold member of the ADM706 supervisor family. It asserts an active-low reset during power-up, power-down, and brownout conditions and maintains reset for a 200 ms timeout after the monitored supply returns above threshold.
An independent 1.6 s watchdog, debounced manual-reset input, and 1.25 V power-fail comparator allow the same device to monitor processor activity and an additional voltage-warning point.
Key Features
- 2.93 V reset threshold specific to ADM706S.
- Active-low reset with 200 ms reset pulse width.
- Independent 1.6 s watchdog timer.
- 1.25 V power-fail comparator and debounced manual reset.
Functional Highlights
The S suffix is electrically meaningful: related R and T variants use different reset thresholds. Replacing the suffix without checking supply tolerance can change brownout behavior.
The watchdog creates a firmware timing requirement: normal software must toggle WDI inside the 1.6 s interval.
Application Fit
- Microprocessor and microcontroller reset supervision.
- Battery-operated and portable systems.
- Controllers and instruments requiring watchdog monitoring.
- Power-fail or low-battery warning circuits.
Design Considerations
- Check the 2.93 V threshold against the processor’s minimum safe operating voltage and supply tolerance.
- Ensure firmware services WDI within 1.6 s in every normal state.
- Scale external voltages into the 1.25 V PFI threshold with suitable resistor tolerance and hysteresis.
- Confirm active-low reset polarity matches the processor.
Product Status
Manufacturer status: PRODUCTION
Analog Devices currently lists ADM706SARZ-REEL as PRODUCTION.
Related Engineering Resources
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