Analog Devices Inc. ADM8696ANZ

Overview

ADM8696ANZ from Analog Devices is a microprocessor supervisory circuit with integrated battery switchover, adjustable 1.3 V low-line monitor, watchdog timer (100 ms/1.6 s or external-programmable), power-fail detection (PFI/PFO), and reset generation asserted down to 1 V VCC. It delivers up to 100 mA from VOUT during main supply operation and switches seamlessly to VBATT backup for CMOS RAM retention in automotive and industrial embedded systems.

For engineers reviewing the ADM8696ANZ datasheet, ADM8696ANZ pinout, ADM8696ANZ application, or ADM8696ANZ equivalent, key selection criteria include its guaranteed reset assertion at 1 V VCC, automatic battery switchover with 70 mV threshold and 20 mV hysteresis, 400 nA standby current in backup mode, dual reset outputs (active-low RESET and active-high RESET), and configurable watchdog timeout via OSC SEL/OSC IN.

Technical Context

The ADM8696ANZ implements a dual-threshold comparator architecture for LLIN (1.3 V ±50 mV) and PFI (1.3 V ±100 mV), each with independent output control (RESET/LOW LINE and PFO). Its internal PMOS VOUT switch exhibits 0.7 Ω on-resistance and supports 100 mA continuous load, while the battery switchover logic activates when VCC falls below VBATT minus 70 mV during power-down and 50 mV during power-up.

Watchdog functionality uses a three-level WDI input (internally biased to 38% VCC, ~5 MΩ impedance) that resets on any transition; timeout is selectable via OSC SEL: internal oscillator (100 ms or 1.6 s), external clock (4032–4097 cycles), or external capacitor (e.g., 47 pF yields 1.6 s). The BATT ON output sinks ≥7 mA and directly drives PNP pass transistors for >100 mA VOUT extension.

Key Specifications

Pinout & Package

ADM8696ANZ is supplied in a 16-pin plastic DIP (N-16) package with 0.3-inch width and through-hole mounting. Pin 1 is VBATT; pin 16 is active-high RESET. All pins are electrically defined per Analog Devices' official pin function description.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX696CPD+ and TPS3823-50DBVR, the ADM8696ANZ uniquely integrates battery switchover, dual reset outputs, and field-programmable watchdog timing - eliminating four discrete components and reducing PCB area by >35% in memory-critical embedded designs.

Availability

ADM8696ANZ is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, medical infusion pumps, and telecom remote terminal units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADM8696ANZ 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 ADM8696ANZ belongs to Analog Devices' microprocessor supervisory circuits product line, engineered specifically for robust power monitoring and battery-backed memory retention in harsh-environment embedded systems.

FAQ

What is the minimum VCC voltage at which ADM8696ANZ guarantees RESET assertion?

The ADM8696ANZ guarantees active-low RESET assertion down to 1 V VCC, verified across the full industrial temperature range (−40°C to +85°C). This capability ensures reliable microprocessor hold-down during severe brownout conditions, such as automotive cranking events where battery voltage may dip below 6 V. The specification is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official Analog Devices datasheet for ADM8696ANZ.

How does ADM8696ANZ handle battery switchover during power failure?

The ADM8696ANZ automatically switches VOUT from VCC to VBATT when VCC falls below VBATT minus 70 mV during power-down (or minus 50 mV during power-up), with 20 mV hysteresis to prevent chatter. In battery backup mode, VOUT tracks VBATT with <5 mV dropout at 250 µA, and supply current drops to 0.4 µA typical. The BATT ON output goes high to indicate switchover and can directly drive an external PNP transistor for higher current delivery. This behavior is fully documented in the Battery Switchover Section of the ADM8696ANZ datasheet.

Can ADM8696ANZ generate both active-low and active-high reset signals simultaneously?

Yes, the ADM8696ANZ provides two dedicated reset outputs: pin 15 is active-low RESET, and pin 16 is active-high RESET - the logical complement of pin 15. Both outputs are asserted synchronously when LLIN falls below 1.3 V or when the watchdog times out. The active-high RESET is open-drain compatible and reaches 3.5 V at VCC = 5 V with 1 µA source current, enabling direct interface to processors requiring high-true reset inputs without external level-shifting circuitry.

What are the valid configurations for programming the watchdog timeout period on ADM8696ANZ?

The ADM8696ANZ supports three watchdog timeout configurations: (1) internal oscillator with OSC SEL high/floating - selects either 100 ms (OSC IN low) or 1.6 s (OSC IN high/floating); (2) external clock applied to OSC IN with OSC SEL low - timeout = 4032–4097 cycles; (3) external capacitor from OSC IN to GND with OSC SEL low - timeout scales linearly (e.g., 47 pF = 1.6 s). All modes are validated in Table I and Figure 4 of the ADM8696ANZ datasheet, and the watchdog resets on every WDI transition.

Is ADM8696ANZ qualified for automotive applications?

Yes, the ADM8696ANZ is explicitly qualified for automotive applications per the "Qualified for Automotive Applications" statement in the Applications section of its official datasheet. It operates across the full industrial temperature range (−40°C to +85°C), features ESD protection rated to 4000 V HBM, and includes design elements critical for automotive use - including guaranteed 1 V reset assertion, robust battery switchover with hysteresis, and low 400 nA backup current that supports >10-year coin-cell life. These attributes meet AEC-Q100 stress test requirements for non-safety-critical ECUs.