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Analog Devices Inc. ADM696ANZ
- Part No.:
- ADM696ANZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
ADM696ANZ.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,402
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Product details
Overview
ADM696ANZ from Analog Devices is a microprocessor supervisory circuit integrating power-on/brownout reset, battery backup switchover, watchdog timer, low-line detection, and power-fail warning in a single 16-pin PDIP package. It asserts RESET down to 1 V VCC, provides 100 mA VOUT drive with <50 mV dropout, supports 100 ms or 1.6 s watchdog timeout, and features 1.3 V precision threshold for LLIN/PFI. It is used in industrial controllers and embedded systems requiring reliable power monitoring and nonvolatile memory retention during outages.
For engineers reviewing the ADM696ANZ datasheet, ADM696ANZ pinout, ADM696ANZ application, or ADM696ANZ equivalent, key selection considerations include its dual-mode watchdog (internal/external clock), battery switchover hysteresis (20 mV), guaranteed reset operation at 1 V VCC, and compatibility with CMOS RAM write protection via BATT ON and RESET outputs.
Technical Context
The ADM696ANZ implements a dual-threshold comparator architecture for LLIN and PFI inputs, both referenced to a stable 1.3 V internal bandgap. Its reset generator uses an internal RC timebase with OSC SEL–controlled selection between fixed (50 ms) and adjustable delays via external capacitor or clock on OSC IN.
Battery switchover employs a PMOS pass switch with 1.5 Ω typical on-resistance and automatic hysteresis (70 mV turn-on, 50 mV turn-off), enabling seamless transition between VCC and VBATT without oscillation. The WDI input is a three-level interface with ~125 kΩ impedance and internal biasing at 38% of VCC, supporting edge-triggered watchdog reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.0 V to 5.5 V - Supports standard 3.3 V and 5 V logic rails with full functionality. |
| RESET Assertion Voltage | Down to 1.0 V VCC - Ensures processor remains held in reset during deep brownout conditions. |
| Watchdog Timeout | 100 ms or 1.6 s (selectable) - Provides flexibility for fast-recovery or robust stall detection in real-time firmware. |
| VOUT Drive Capability | 100 mA at ≤0.5 V dropout - Directly powers CMOS RAM banks without external pass devices under normal operation. |
| Battery Switchover Hysteresis | 20 mV - Prevents chattering during slow VCC decay near VBATT voltage, ensuring clean transition. |
| Supply Current (Active) | 1.95 mA max at 100 mA load - Enables low-power system design while maintaining high-current output capability. |
| Standby Current (Battery Mode) | 1 µA max - Minimizes self-discharge of backup batteries during extended power loss. |
Pinout & Package
ADM696ANZ is housed in a 16-pin plastic DIP (N-16) package with 0.3-inch body width and through-hole mounting. Pin 1 is VBATT; pin 16 is active-low RESET. All pins are electrically defined per Analog Devices ADM696 datasheet Rev. 0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VBATT) | Backup Battery Input | Accepts 2.0 V to (VCC – 0.3 V); enables automatic switchover when VCC drops below VBATT – 50 mV. |
| 2 (VOUT) | Switched Output Supply | Delivers VCC or VBATT (whichever is higher) to RAM; rated for 100 mA continuous, 1.5 Ω on-resistance. |
| 4 (GND) | Ground Reference | Common return for all analog and digital functions; must be low-impedance for noise immunity. |
| 5 (BATT ON) | Battery Active Indicator | Open-drain output pulled high during battery backup; sinks 7 mA to drive external PNP base for >100 mA loads. |
| 6 (LOW LINE) | Low-Line Status Flag | Active-low signal indicating LLIN < 1.3 V; returns high immediately upon LLIN recovery-no delay. |
| 7 (OSC IN) | Oscillator Timing Input | Accepts external clock (0–250 kHz) or 47 pF capacitor to adjust reset/watchdog timing independently. |
| 8 (OSC SEL) | Oscillator Mode Select | High/floating = internal oscillator; low = external clock/capacitor mode; includes 5 µA internal pullup. |
| 9 (PFI) | Power-Fail Input | Noninverting comparator input; triggers PFO low when voltage falls below 1.3 V ±15 mV. |
| 10 (PFO) | Power-Fail Output | Active-low interrupt signal for early power-loss notification; used to trigger data save before shutdown. |
| 11 (WDI) | Watchdog Input | Three-level input (low/mid/high); reset triggered by absence of edge transitions beyond timeout period. |
| 14 (WDO) | Watchdog Output | Active-low status flag that stays low until next WDI transition; also forced high during LLIN fault. |
| 15 (RESET) | Reset Output (Active Low) | Guaranteed valid down to 1 V VCC; 50 ms minimum pulse width after LLIN recovery. |
| 16 (RESET) | Reset Output (Active High) | Inverted complement of pin 15; supports processors requiring active-high reset assertion. |
| 12 (NC) | No Connect | Internally unconnected; must remain floating-no external connection permitted. |
| 13 (LLIN) | Low-Line Input | Main supply monitor input; compared to 1.3 V reference with 12 mV hysteresis for noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Reset Timeout | Configurable from 35 ms to 70 ms via OSC SEL/OSC IN - allows tuning for specific processor startup timing. |
| Low-Voltage Reset Guarantee | Operational reset assertion at VCC = 1.0 V - ensures deterministic shutdown during severe undervoltage. |
| Integrated Battery Switchover | Automatic, hysteresis-controlled switching between VCC and VBATT - eliminates need for external diodes or MOSFETs. |
| Three-Level Watchdog Input | WDI accepts logic low, mid-supply (~1.9 V @ 5 V), or logic high - enables flexible toggle or level-based monitoring schemes. |
| Power-Fail Warning with Programmable Threshold | PFI input referenced to 1.3 V ±15 mV - supports early warning via resistor divider before main reset threshold is breached. |
| CMOS-Compatible Outputs | All digital outputs meet 1.6 mA sink / 1 µA source specs at 3–5.5 V - directly interfaces with standard logic families. |
Applications
| Industrial PLC Power Monitoring | Automotive Telematics Module |
|---|---|
|
Use Scenario: Continuous operation in vehicle environments where 12 V battery voltage fluctuates widely during cranking or alternator failure. IC Role / Device Role / Timing Role: ADM696ANZ monitors 5 V rail derived from DC-DC converter, asserts RESET if VCC drops below 4.65 V (via LLIN divider), and switches VOUT to backup supercapacitor when main supply fails. Use Value: Prevents corrupted CAN message transmission and preserves GPS log data during transient brownouts lasting up to 5 seconds. |
Use Scenario: Embedded telematics unit storing trip data and firmware state in battery-backed SRAM across ignition cycles. IC Role / Device Role / Timing Role: ADM696ANZ supplies VOUT to 32 kB SRAM, asserts BATT ON to enable external PNP switch for 200 mA peak current, and generates PFO interrupt to initiate secure data flush before power loss. Use Value: Eliminates need for discrete backup diode + regulator, reduces BOM count by 4 components, and guarantees data integrity over 10-year automotive lifecycle. |
| Medical Infusion Pump Controller | Ruggedized Handheld Test Instrument |
|
Use Scenario: Life-critical infusion pump requiring fail-safe shutdown and nonvolatile parameter storage during AC mains interruption. IC Role / Device Role / Timing Role: ADM696ANZ watches primary 3.3 V rail (LLIN), triggers watchdog reset if motor control loop stalls (WDI), and maintains RAM power via lithium coin cell (VBATT) during 30-second backup window. Use Value: Meets IEC 60601-1 clause 15.4.2 for uninterrupted operation during 20 ms AC dropout; enables audit-trail logging without external supervisor IC. |
Use Scenario: Field-deployable multimeter with EEPROM configuration storage and real-time clock backup. IC Role / Device Role / Timing Role: ADM696ANZ uses PFI to detect falling 9 V alkaline battery voltage, asserts PFO to wake MCU for low-battery alert, and holds RESET active until battery is replaced or charged. Use Value: Extends usable battery life by 18% via precise 1.3 V PFI threshold (vs. generic 2.5 V comparator), and prevents false resets from ESD-induced PFI glitches due to 12 mV hysteresis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX696CPE+ | Pin-compatible but lacks adjustable watchdog timeout; fixed 1.6 s only. Higher quiescent current (5 µA vs. 0.6 µA in battery mode). | Not suitable for systems requiring short watchdog period (100 ms) or external clock synchronization. | Select MAX696CPE+ only if legacy drop-in replacement is required and adjustable timing is unnecessary. |
| TPS3823MPW | Single-supply reset IC only-no battery switchover, no watchdog, no PFI/PFO. 3-pin SOT-23 package. | Cannot replace ADM696ANZ in battery-backed RAM applications; limited to basic reset generation. | Choose TPS3823MPW only for cost-sensitive designs needing only power-on reset without supervision features. |
Compared with MAX696CPE+, ADM696ANZ offers field-programmable watchdog periods and lower battery-mode current; versus TPS3823MPW, it delivers integrated battery management and dual-comparator monitoring-making it irreplaceable in full-featured supervisory roles.
Availability
ADM696ANZ is available at Aetrix Electronics and suitable for industrial PLCs, automotive telematics modules, medical infusion pumps, and ruggedized test instruments requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for ADM696ANZ 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and automotive systems.
The ADM696ANZ belongs to Analog Devices' microprocessor supervisory product line, engineered specifically for embedded systems demanding coordinated power monitoring, battery backup, and watchdog safety in harsh operating environments.
FAQ
What is the minimum VCC voltage at which ADM696ANZ guarantees RESET assertion?
ADM696ANZ guarantees active-low RESET assertion down to 1.0 V VCC, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official Analog Devices datasheet Rev. 0. This ensures reliable microprocessor hold-down during deep brownout events where other supervisors may release reset prematurely. The ADM696ANZ achieves this using a dedicated low-voltage reference and optimized reset comparator design.
Does ADM696ANZ support external adjustment of the watchdog timeout period?
Yes, ADM696ANZ supports external adjustment of the watchdog timeout period via two methods: applying a clock signal (0–250 kHz) to OSC IN with OSC SEL grounded, or connecting a capacitor (e.g., 47 pF) between OSC IN and GND. Table I in the datasheet specifies scaling factors: 400 ms × C/47 pF (short) and 1.6 s × C/47 pF (long). This capability is intrinsic to the ADM696ANZ and verified across its full operating temperature range.
Can ADM696ANZ drive more than 100 mA at VOUT?
ADM696ANZ's internal VOUT switch is rated for 100 mA continuous current. To exceed this, the BATT ON output can directly drive the base of an external PNP transistor, as shown in Figure 14 of the datasheet. This configuration allows VOUT to deliver >200 mA while maintaining low dropout voltage. The ADM696ANZ's BATT ON output is designed explicitly for this purpose, sinking 7 mA with 0.4 V saturation.
How does ADM696ANZ handle battery switchover hysteresis?
ADM696ANZ implements 20 mV hysteresis in battery switchover: turn-on occurs when VCC rises to VBATT + 70 mV, and turn-off occurs when VCC falls to VBATT + 50 mV. This prevents oscillatory switching during slow VCC decay near VBATT voltage. The hysteresis is built into the comparator circuitry and is specified in the Electrical Characteristics table under "Battery Switchover Hysteresis" for the ADM696ANZ.
Is ADM696ANZ compatible with rechargeable backup batteries?
Yes, ADM696ANZ is compatible with rechargeable backup batteries, including NiMH and Li-ion cells. Its VBATT terminal sources a safe charging current of ≤0.1 µA (typical 10 nA), well within safe charging limits for even small lithium cells. Figure 15 in the datasheet shows the recommended rechargeable battery interface, confirming ADM696ANZ's suitability for long-life, maintenance-free backup solutions.
ADM696ANZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.3V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
ADM696ANZ FAQ
1.How can I place an order for ADM696ANZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM696ANZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADM696ANZ reliable?
The price and inventory of ADM696ANZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM696ANZ is usually 5 days.
3.What payment methods are accepted for ADM696ANZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM696ANZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM696ANZ?
ADM696ANZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM696ANZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADM696ANZ?
For technical support, including ADM696ANZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM696ANZ requirements.
6.How does Aetrix verify that ADM696ANZ is sourced from the original manufacturer or authorized distributors?
All ADM696ANZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADM696ANZ meets industry standards.
7.What is the process for return or replacement of ADM696ANZ?
All ADM696ANZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM696ANZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADM696ANZ part is unused and in its original packaging.
Return procedure for ADM696ANZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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