Analog Devices Inc. ADM706SARZ

Overview

ADM706SARZ from Analog Devices is a 3 V microprocessor supervisory circuit with active-low reset output, 2.93 V precision voltage monitoring threshold, 200 ms reset pulse width, 100 µA quiescent current, and integrated watchdog timer with 1.6 s timeout-designed for reliable power-up, brownout, and software fault recovery in embedded controllers and battery-powered instrumentation.

For engineers reviewing the ADM706SARZ datasheet, ADM706SARZ pinout, ADM706SARZ application, or ADM706SARZ equivalent, this page delivers verified functional identity, SOIC-8 package mapping, reset/watchdog/PFI/PFO signal roles, and validated alternatives for 3 V system supervision where guaranteed RESET validity down to VCC = 1 V and debounced manual reset are required.

Technical Context

The ADM706SARZ implements a precision bandgap-based voltage reference (2.93 V ±40 mV) for supply monitoring, coupled with an independent watchdog timer cleared by WDI transitions and a dedicated 1.25 V power-fail comparator (PFI/PFO). Its reset generator guarantees valid active-low RESET output even at VCC = 1 V, enabling robust shutdown sequencing.

It features TTL/CMOS-compatible MR input with internal 70 µA pull-up and 500 ns minimum pulse width support, plus rail-to-rail compatible digital outputs (RESET, WDO, PFO) with specified VOH/VOL across 3.0–5.5 V VCC range-making it suitable for direct interfacing with 3.3 V microcontrollers without level-shifting.

Key Specifications

Pinout & Package

ADM706SARZ is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch, 5.00 mm × 4.00 mm body, and gull-wing leads. Pin 1 is marked by a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with MAX706SESA+ and TPS3808G33DBVR, the ADM706SARZ uniquely integrates reset, watchdog, and power-fail comparator in one SOIC-8 device-enabling compact, feature-complete supervision without trade-offs in monitoring depth or fault coverage.

Availability

ADM706SARZ is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical instruments, smart energy meters, and embedded test equipment requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.

Supply support for ADM706SARZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADM706 series belongs to Analog Devices' precision supervisory IC product line, engineered specifically for deterministic microprocessor reset, watchdog-based firmware recovery, and multi-rail power monitoring in mission-critical embedded systems.

FAQ

What is the exact reset threshold voltage of the ADM706SARZ?

The ADM706SARZ has a nominal reset threshold of 2.93 V, with a guaranteed range of 2.85 V to 3.00 V at TA = −40°C to +85°C. This value is factory-trimmed and applies specifically to the ADM706S variant; it is not adjustable and remains stable over temperature and supply voltage variations within its operating range. The ADM706SARZ uses this threshold to assert its active-low RESET output whenever VCC falls below the specified level.

Does the ADM706SARZ provide both active-high and active-low reset outputs?

No, the ADM706SARZ provides only an active-low RESET output (Pin 7). It does not include the complementary active-high RESET output found in the ADM708-series variants. The ADM706SARZ is part of the ADM706 family, which offers single-polarity reset; for dual-output capability, the ADM708SARZ would be required-but that part omits the watchdog function present in the ADM706SARZ.

Can the ADM706SARZ watchdog timer be disabled or bypassed?

The ADM706SARZ watchdog timer cannot be disabled-it is always enabled and resets only upon transition at the WDI input. However, it can be effectively bypassed by tying WDI to a stable logic high or low level, though this eliminates watchdog protection. For applications requiring configurable watchdog enable/disable, a different supervisory IC such as the ADM1085 or MAX6369 would be necessary. The ADM706SARZ watchdog timeout is fixed at 1.6 s and non-adjustable.

What is the minimum VCC voltage at which ADM706SARZ guarantees valid RESET output?

The ADM706SARZ guarantees valid active-low RESET output down to VCC = 1 V, as explicitly specified in the datasheet's General Description and Absolute Maximum Ratings sections. Below 1 V, the internal output stage loses drive capability, and external pull-down (e.g., 10 kΩ to GND) may be required to maintain logic-low state. This specification ensures reliable processor hold-down during deep brownout and full power collapse scenarios.

Is the ADM706SARZ RoHS compliant and lead-free?

Yes, the ADM706SARZ is RoHS compliant and lead-free, as confirmed by Analog Devices' official product documentation and packaging markings. The "RZ" suffix in the part number denotes RoHS-compliant, lead-free, and halogen-free construction in the SOIC_N (R-8) package. It meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for industrial temperature range (−40°C to +85°C).