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Analog Devices Inc. ADM706PAR
- Part No.:
- ADM706PAR
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM706PAR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,284
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Product details
Overview
ADM706PAR 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-designed for reliable power-up, brownout, and software fault monitoring in embedded control systems.
For engineers reviewing the ADM706PAR datasheet, ADM706PAR pinout, ADM706PAR application, or ADM706PAR equivalent, key selection criteria include reset polarity compatibility, VCC validity down to 1 V, PFI/PFO power-fail warning capability, and WDI/WDO watchdog timing integrity in 3 V microcontroller systems.
Technical Context
The ADM706PAR implements a precision voltage monitor with 2.63 V ±70 mV threshold and 20 mV hysteresis, ensuring stable reset assertion during 3 V supply ramp-up and brownout recovery. Its internal 1.6 sec watchdog timer clears on any WDI transition and forces WDO low on timeout or VCC undervoltage.
A dedicated 1.25 V power-fail comparator accepts external voltage division via PFI to generate early-warning PFO interrupts; MR input is TTL/CMOS-compatible with 70 µA internal pull-up and 500 ns minimum pulse width support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V ±70 mV - ensures reset activation before 3 V system logic fails, compatible with 3 V LVTTL/LVCMOS I/O thresholds |
| Reset Pulse Width | 200 ms typical - provides sufficient hold time for microprocessor core and PLL stabilization after power-up or recovery |
| Quiescent Current | 100 µA at VCC < 3.6 V - enables battery-backed operation for >10 years in low-power monitoring applications |
| Watchdog Timeout | 1.6 sec ±650 ms - balances fault detection latency against false triggers from transient software stalls |
| VCC Validity Range | 1.0 V to 5.5 V - guarantees RESET remains asserted even as supply collapses below logic threshold, preventing metastability |
| Power-Fail Threshold | 1.25 V ±50 mV on PFI - supports configurable early-warning shutdown via external resistor divider for preregulator monitoring |
Pinout & Package
ADM706PAR is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm pitch, 5.00 mm × 4.00 mm body, and 1.75 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Manual Reset Input | Debounced TTL/CMOS-compatible input; internally pulled up with 70 µA; asserts RESET when driven below 0.6 V |
| 2 (VCC) | Power Supply Input | Primary supply rail; requires 0.1 µF decoupling to GND; supports operation from 1.0 V to 5.5 V |
| 3 (GND) | Ground Reference | Common return for all analog and digital functions; must be low-impedance connection to system ground plane |
| 4 (PFI) | Power-Fail Input | Noninverting input to 1.25 V comparator; monitors auxiliary supply via external resistive divider; connect to GND if unused |
| 5 (PFO) | Power-Fail Output | Active-low open-drain output; sinks ≥1.2 mA at 0.3 V; signals power degradation before VCC dropout |
| 6 (WDI) | Watchdog Input | Edge-sensitive input; clears 1.6 sec timer on rising or falling edge; accepts pulses as narrow as 50 ns |
| 7 (RESET) | Reset Output | Active-low push-pull output; drives low for 200 ms after VCC rise or MR assertion; valid down to VCC = 1 V |
| 8 (WDO) | Watchdog Output | Active-low push-pull output; goes low on WDI inactivity or VCC < 2.55 V; resets only when WDI toggles or RESET deasserts |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET below 1 V VCC | Ensures microprocessor remains held in known state during full supply collapse-no external pull-down required |
| Independent watchdog timer | 1.6 sec timeout with edge-triggered clear prevents lockup without requiring software polling overhead |
| Debounced manual reset input | 70 µA internal pull-up and 200 ms debounce eliminate need for external RC filtering or Schmitt triggers |
| Dual-supply monitoring capability | PFI/PFO pair enables early warning of preregulator failure, allowing orderly shutdown before main VCC dropout |
| Low quiescent current | 100 µA operation extends battery life in portable instruments and remote sensors without sacrificing supervision fidelity |
Applications
| Industrial PLC Controller Monitoring | Medical Infusion Pump Safety Supervision |
|---|---|
Use Scenario: Continuous monitoring of 3 V logic supply and 5 V motor driver rail in programmable logic controller cabinets exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: ADM706PAR generates active-low RESET to halt CPU execution during brownout; PFI monitors 5 V rail via 4.7 kΩ/1.2 kΩ divider to trigger PFO interrupt 100 ms before VCC dropout. Use Value: Prevents corrupted ladder logic execution and relay chatter by enforcing deterministic reset sequencing across dual supplies. | Use Scenario: Battery-powered infusion pump with real-time dosing algorithm requiring fail-safe shutdown on low battery or power interruption. IC Role / Device Role / Timing Role: ADM706PAR uses MR input for user-initiated emergency stop; PFI senses battery voltage decay; WDI is toggled by watchdog thread every 800 ms. Use Value: Guarantees immediate motor cutoff and display freeze upon detected fault-meeting IEC 62304 Class C software safety requirements. |
| Automotive Body Control Module (BCM) | Point-of-Sale Terminal Power Integrity |
Use Scenario: 3 V microcontroller in BCM subjected to load dump transients and cold-crank voltage sag down to 6 V battery input. IC Role / Device Role / Timing Role: ADM706PAR's 2.63 V reset threshold aligns with 3 V MCU VDD min spec; RESET holds CPU in reset until stabilized; WDO connected to NMI for firmware crash recovery. Use Value: Eliminates need for discrete reset IC + external watchdog IC-reducing BOM count and PCB area in space-constrained modules. | Use Scenario: Retail POS terminal with EEPROM-based configuration storage and USB host interface vulnerable to corruption during AC power loss. IC Role / Device Role / Timing Role: ADM706PAR monitors 3.3 V system rail; PFO triggers controlled EEPROM write-protection and USB disconnect sequence before VCC drops below 2.7 V. Use Value: Prevents transaction data loss and flash memory corruption during unscheduled power interruptions-ensuring PCI-DSS compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706RCSA+ | Same 2.63 V reset threshold, 200 ms timeout, and active-low RESET; lacks PFI/PFO and watchdog functionality | Suitable only for basic reset generation-cannot support power-fail warning or software stall detection | Select when cost sensitivity outweighs need for dual-supply monitoring or watchdog safety coverage |
| TPS3808G12DBVR | 2.93 V fixed threshold, 200 ms delay, no watchdog or PFI; supports 1.8–6 V VCC range and 1.8 µA quiescent current | Optimized for ultra-low-power battery systems but incompatible with 2.63 V reset requirement of legacy 3 V designs | Choose for new energy-harvesting or wearable designs where extended battery life is critical and reset threshold can be adjusted |
Compared with MAX706RCSA+ and TPS3808G12DBVR, ADM706PAR uniquely integrates reset, watchdog, and power-fail monitoring in one SOIC-8 device-enabling comprehensive fault coverage without increasing board footprint or design complexity.
Availability
ADM706PAR is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, automotive body control modules, and point-of-sale terminals requiring stable component supply and long-term lifecycle assurance.
Supply support for ADM706PAR 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 family was engineered specifically for robust microprocessor supervision in mission-critical embedded systems-emphasizing guaranteed reset validity at ultra-low VCC, integrated watchdog independence, and flexible power-fail warning capability.
FAQ
What is the reset output polarity of the ADM706PAR?
The ADM706PAR features an active-low RESET output (pin 7), consistent with the ADM706R variant. It drives low for 200 ms when VCC falls below 2.63 V or when MR is asserted, and remains valid down to VCC = 1 V-ensuring reliable hold condition during supply collapse. This polarity matches standard 3 V microcontrollers requiring active-low reset assertion.
Does the ADM706PAR include a watchdog timer function?
Yes, the ADM706PAR includes a fully integrated watchdog timer with 1.6 sec nominal timeout (±650 ms). The timer clears on any edge (rising or falling) at WDI (pin 6) and forces WDO (pin 8) low on timeout. Unlike the ADM708 series, the ADM706PAR retains this function-making it suitable for software fault detection in safety-critical applications.
What is the purpose of the PFI and PFO pins on the ADM706PAR?
The PFI (pin 4) and PFO (pin 5) pins implement a dedicated 1.25 V power-fail comparator. PFI accepts a scaled version of an auxiliary supply (e.g., 5 V rail or battery voltage) via external resistors; when PFI drops below 1.25 V, PFO (active-low) asserts to signal impending failure. This enables early-warning shutdown before main VCC dropout-critical for data integrity in systems like POS terminals or medical devices.
Can the ADM706PAR operate with supply voltages below 3 V?
Yes, the ADM706PAR operates over VCC = 1.0 V to 5.5 V. Its RESET output remains valid down to VCC = 1 V, guaranteeing the microprocessor stays held in reset during full supply collapse. This feature eliminates the need for external pull-down resistors and ensures deterministic behavior in brownout conditions common in battery-powered or automotive environments.
What package type is used for the ADM706PAR?
The ADM706PAR is supplied in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, measuring 5.00 mm × 4.00 mm with 1.27 mm lead pitch. This narrow-body surface-mount package supports automated assembly and offers thermal performance superior to PDIP variants, with θJA = 110°C/W and 470 mW power dissipation rating.
ADM706PAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
ADM706PAR FAQ
1.How can I place an order for ADM706PAR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM706PAR 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 ADM706PAR reliable?
The price and inventory of ADM706PAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM706PAR is usually 5 days.
3.What payment methods are accepted for ADM706PAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM706PAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM706PAR?
ADM706PAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM706PAR 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 ADM706PAR?
For technical support, including ADM706PAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM706PAR requirements.
6.How does Aetrix verify that ADM706PAR is sourced from the original manufacturer or authorized distributors?
All ADM706PAR 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 ADM706PAR meets industry standards.
7.What is the process for return or replacement of ADM706PAR?
All ADM706PAR units undergo pre-shipment inspection (PSI). If there is an issue with ADM706PAR, 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 ADM706PAR part is unused and in its original packaging.
Return procedure for ADM706PAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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