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Analog Devices Inc. ADM706PARZ
- Part No.:
- ADM706PARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM706PARZ.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:130
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Product details
Overview
ADM706PARZ from Analog Devices is a 3 V microprocessor supervisory circuit with active-low 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 ADM706PARZ datasheet, ADM706PARZ pinout, ADM706PARZ application, or ADM706PARZ equivalent, key selection criteria include reset polarity compatibility, VCC validity down to 1 V, PFI/PFO power-fail warning capability, and MR debouncing for reliable manual reset integration.
Technical Context
The ADM706PARZ implements a precision voltage monitor with 2.63 V ±70 mV threshold and 20 mV hysteresis, guaranteeing valid RESET assertion even at VCC = 1 V. Its internal 1.6 s watchdog timer clears on any WDI transition and forces WDO low on timeout or VCC brownout.
It integrates a 1.25 V reference-based power-fail comparator (PFI/PFO), TTL/CMOS-compatible MR input with 70 µA internal pull-up, and dual-output logic (RESET and WDO) fully specified across −40°C to +85°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V ±70 mV - sets precise power-on/brownout detection point for 3 V systems |
| Reset Pulse Width | 200 ms typical - ensures sufficient processor stabilization time after power recovery |
| Quiescent Current | 100 µA at VCC < 3.6 V - enables long battery life in portable instruments |
| Watchdog Timeout | 1.6 s ±600 ms - provides robust software hang detection without false triggers |
| VCC Validity Range | 1.0 V to 5.5 V - guarantees functional reset assertion during deep brownout |
| Power-Fail Threshold | 1.25 V ±50 mV - enables accurate low-battery or preregulator monitoring via external resistor divider |
| MR Input Pull-Up | 70 µA typical - eliminates need for external pull-up in switch-driven reset circuits |
Pinout & Package
ADM706PARZ is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch and 5.00 mm × 4.00 mm body dimensions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | Debounced TTL/CMOS-compatible input; internally pulled up to VCC with 70 µA; asserts RESET when driven below 0.6 V |
| 2 VCC | Power Supply Input | Primary supply rail (1.0–5.5 V); requires 0.1 µF decoupling capacitor to GND |
| 3 GND | Ground Reference | Common return path for all analog and digital functions; must be low-impedance |
| 4 PFI | Power-Fail Input | Noninverting input to 1.25 V comparator; monitors secondary supply or battery via resistive divider |
| 5 PFO | Power-Fail Output | Active-low open-drain output signaling PFI < 1.25 V; used for early power-loss interrupt |
| 6 WDI | Watchdog Input | Edge-sensitive input; any transition resets 1.6 s timer; accepts pulses as narrow as 50 ns |
| 7 RESET | Reset Output | Active-low push-pull output; held low for 200 ms after VCC rise or MR release; valid down to VCC = 1 V |
| 8 WDO | Watchdog Output | Active-low push-pull output; goes low on watchdog timeout or VCC < reset threshold; synchronizes with RESET during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET at VCC = 1 V | Ensures microprocessor remains held in known state during deep undervoltage conditions, preventing undefined operation |
| Debounced MR input | Eliminates mechanical switch bounce without external RC network, reducing BOM count and layout area |
| Integrated 1.25 V power-fail comparator | Enables early-warning shutdown sequencing for critical systems by monitoring auxiliary supplies or battery voltage |
| 1.6 s watchdog timer with edge-triggered WDI | Provides deterministic software hang detection with minimal firmware overhead-only one GPIO toggle required every 1.6 s |
| 20 mV reset threshold hysteresis | Prevents oscillatory reset assertion during slow VCC ramp-up or noise-induced threshold crossings |
Applications
| Industrial Controller Monitoring | Portable Medical Instrumentation |
|---|---|
Use Scenario: PLC I/O modules require guaranteed reset during 24 V DC supply fluctuations and field wiring transients. IC Role / Device Role / Timing Role: ADM706PARZ provides brownout reset, manual reset via front-panel button, and watchdog supervision of real-time control firmware. Use Value: 200 ms reset pulse ensures deterministic MCU boot after line disturbance; 1 V VCC validity prevents spurious restarts during marginal supply conditions. | Use Scenario: Handheld glucose meters operate from single-cell Li-ion batteries with voltage decay from 4.2 V to 2.8 V. IC Role / Device Role / Timing Role: ADM706PARZ monitors main 3.3 V rail for brownout and uses PFI to detect battery depletion via resistive divider. Use Value: 2.63 V reset threshold aligns with 3.3 V LDO dropout; 1.25 V PFI comparator enables accurate end-of-life battery warning before system crash. |
| Embedded Network Gateway | Test & Measurement Equipment |
Use Scenario: Ethernet-to-serial gateways run Linux on ARM SoCs requiring clean power-on reset and firmware watchdog. IC Role / Device Role / Timing Role: ADM706PARZ generates hardware reset on power-up and feeds WDI from GPIO toggled by watchdog daemon. Use Value: Active-low RESET matches most ARM reset inputs; 1.6 s timeout balances responsiveness and tolerance to brief CPU stalls during network packet processing. | Use Scenario: Benchtop oscilloscopes use FPGA-based acquisition engines that must initialize reliably after AC power cycling. IC Role / Device Role / Timing Role: ADM706PARZ supervises 3.3 V FPGA core supply and provides MR input for front-panel "reset configuration" button. Use Value: 100 µA quiescent current minimizes standby drain; MR debouncing ensures single-button press yields exactly one reset event. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706RCSA+ | Pin-compatible 8-pin SOIC; identical 2.63 V reset threshold and 200 ms timeout; 1.2 µA max quiescent current vs. 100 µA | Lacks integrated watchdog timer and PFI/PFO comparator; only basic reset + MR functionality | Select when ultra-low power is critical and watchdog/power-fail features are unnecessary |
| TPS3808G18DBVR | 2.93 V fixed threshold (not 2.63 V); 200 ms reset delay; no watchdog or PFI; 1.1 µA quiescent current | Designed for 3.3 V systems only; no manual reset debouncing or power-fail warning capability | Select for cost-sensitive 3.3 V applications where reset threshold tolerance allows 2.93 V and auxiliary monitoring is handled externally |
Compared with MAX706RCSA+ and TPS3808G18DBVR, ADM706PARZ uniquely combines 2.63 V precision reset, integrated watchdog, and PFI/PFO power-fail detection in a single SOIC-8 package-enabling compact, feature-complete supervision without external components.
Availability
ADM706PARZ is available at Aetrix Electronics and suitable for industrial controller monitoring, portable medical instrumentation, embedded network gateway design, and test & measurement equipment requiring stable component supply and long-term lifecycle support.
Supply support for ADM706PARZ 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.
The ADM706 family delivers precision voltage supervision with integrated watchdog and power-fail detection, designed specifically for reliability-critical embedded systems operating from 3 V supplies.
FAQ
What is the reset output polarity of ADM706PARZ?
The ADM706PARZ features an active-low RESET output, consistent with the ADM706R variant designation. This means RESET asserts low during power-up, brownout, or MR activation and remains low for 200 ms after VCC rises above 2.63 V or MR is released. The ADM706PARZ does not provide an active-high RESET output-only the ADM706P and ADM708 variants do.
Does ADM706PARZ include a watchdog timer function?
Yes, ADM706PARZ includes a fully integrated watchdog timer with a nominal 1.6 s timeout period. It monitors the WDI input for transitions and drives WDO low if no edge occurs within the timeout window. The timer resets on any WDI edge (high-to-low or low-to-high) and is also cleared when RESET is asserted, ensuring coordinated behavior during system initialization.
What is the minimum VCC voltage at which ADM706PARZ guarantees valid RESET operation?
ADM706PARZ guarantees valid RESET output down to VCC = 1.0 V, as confirmed in the Absolute Maximum Ratings and General Description sections of the datasheet. Below 1 V, internal drive capability degrades; for applications requiring reset hold-down below 1 V, an external pull-down resistor on the RESET line is recommended per Figure 19.
Can ADM706PARZ monitor a second power supply besides VCC?
Yes, ADM706PARZ can monitor a second supply using its dedicated PFI (Power-Fail Input) and PFO (Power-Fail Output) pins. By connecting PFI to a resistive divider from the auxiliary supply, the internal 1.25 V comparator triggers PFO low when the monitored voltage falls below the threshold-enabling early warning of battery depletion or secondary rail failure.
What package type and footprint does ADM706PARZ use?
ADM706PARZ uses an 8-lead SOIC_N (Small Outline Integrated Circuit, narrow body) package designated R-8 per JEDEC MS-012-AA, with 1.27 mm lead pitch and 5.00 mm × 4.00 mm body dimensions. It is compatible with standard SOIC-8 reflow profiles and PCB footprints, and is distinct from the PDIP (N-8) variant ADM706PANZ.
ADM706PARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 160ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADM706PARZ FAQ
1.How can I place an order for ADM706PARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM706PARZ 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 ADM706PARZ reliable?
The price and inventory of ADM706PARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM706PARZ is usually 5 days.
3.What payment methods are accepted for ADM706PARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM706PARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM706PARZ?
ADM706PARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM706PARZ 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 ADM706PARZ?
For technical support, including ADM706PARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM706PARZ requirements.
6.How does Aetrix verify that ADM706PARZ is sourced from the original manufacturer or authorized distributors?
All ADM706PARZ 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 ADM706PARZ meets industry standards.
7.What is the process for return or replacement of ADM706PARZ?
All ADM706PARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM706PARZ, 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 ADM706PARZ part is unused and in its original packaging.
Return procedure for ADM706PARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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