Analog Devices Inc. ADM706PANZ

Overview

ADM706PANZ from Analog Devices is a precision 3 V microprocessor supervisory circuit with active-high reset output, 2.63 V reset threshold, 200 ms reset pulse width, 100 µA quiescent current, and integrated watchdog timer (1.6 s timeout). It monitors power-up, brownout, and supply failure in embedded controllers and battery-powered instrumentation.

For engineers reviewing the ADM706PANZ datasheet, ADM706PANZ pinout, ADM706PANZ application, or ADM706PANZ equivalent, key selection criteria include reset polarity compatibility, guaranteed RESET validity down to 1 V VCC, debounced manual reset input, independent power-fail warning (PFI/PFO), and watchdog supervision for firmware lockup detection.

Technical Context

The ADM706PANZ implements a precision voltage monitor with 2.63 V ±40 mV threshold and built-in hysteresis, ensuring stable reset assertion during supply transients. Its internal 1.6 s watchdog timer clears on any WDI transition and forces WDO low on timeout or VCC brownout.

A dedicated 1.25 V power-fail comparator accepts external voltage division via PFI and drives PFO low for early low-supply warning. The MR input features 70 µA internal pull-up and TTL/CMOS-compatible thresholds, enabling direct switch or logic-level reset initiation without external components.

Key Specifications

Pinout & Package

ADM706PANZ is housed in an 8-lead narrow-body plastic dual in-line package (PDIP, N-8), compliant with JEDEC MS-001, with 0.300-inch body width and 0.100-inch lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX706P and ADM706RANZ, the ADM706PANZ uniquely delivers active-high reset with 1 V operational guarantee and lower quiescent current-critical for energy-constrained, high-reliability embedded systems where reset polarity and deep-brownout behavior are non-negotiable.

Availability

ADM706PANZ is available at Aetrix Electronics and suitable for industrial controller monitoring, portable medical instrumentation, embedded communication gateways, and test & measurement equipment requiring stable component supply and long-term lifecycle support.

Supply support for ADM706PANZ 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 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' microprocessor supervisory product line, designed specifically for reliable power-on reset, brownout protection, and firmware watchdog supervision in resource-constrained embedded systems.

FAQ

What is the reset threshold voltage of the ADM706PANZ?

The ADM706PANZ has a precision reset threshold of 2.63 V, with ±40 mV tolerance over temperature and supply range. This value is factory-trimmed and specified in Table 1 of the Rev. E datasheet. The threshold ensures reliable reset assertion for 3 V systems while accommodating typical supply ripple and tolerance margins. The ADM706PANZ maintains this exact threshold regardless of VCC within its 2.7–5.5 V operating range.

Does the ADM706PANZ provide both active-high and active-low reset outputs?

No, the ADM706PANZ provides only an active-high RESET output on Pin 7. Unlike the ADM708-series or dual-output variants, it does not include an active-low RESET pin. The device is specifically designated by the "P" suffix to indicate active-high reset functionality. For designs requiring both polarities, the ADM708R/ADM708S/ADM708T family must be selected instead.

Can the ADM706PANZ operate with VCC below 2.7 V?

Yes-the ADM706PANZ guarantees valid RESET output down to VCC = 1 V, as explicitly stated in the General Description and validated in Figure 12 and Figure 19 of the datasheet. While its recommended operating range starts at 2.7 V, the internal circuitry remains functional and asserts RESET correctly even during deep brownout conditions, making it suitable for controlled shutdown sequencing.

What is the function of the PFI and PFO pins on the ADM706PANZ?

PFI (Pin 4) is the noninverting input to a dedicated 1.25 V comparator used to monitor auxiliary supplies or preregulator rails via an external resistor divider. PFO (Pin 5) is the corresponding active-low open-drain output that asserts when PFI falls below 1.25 V. This pair enables early power-fail warning independent of the main VCC reset function, supporting graceful shutdown in systems with multiple voltage domains.

Is the ADM706PANZ watchdog timer enabled by default?

Yes-the watchdog timer is fully functional and enabled at power-up. It begins timing upon release of RESET and requires periodic WDI (Pin 6) transitions to prevent timeout. No configuration register or external enable signal is needed. If WDI remains static for >1.6 s, WDO (Pin 8) goes low, providing a hardware-based fail-safe against firmware lockup without software intervention.