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Analog Devices Inc. ADM706RARZ-REEL
- Part No.:
- ADM706RARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM706RARZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,489
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Product details
Overview
ADM706RARZ-REEL 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-on reset and brownout protection in embedded microcontroller systems.
For engineers reviewing the ADM706RARZ-REEL datasheet, ADM706RARZ-REEL pinout, ADM706RARZ-REEL application, or ADM706RARZ-REEL equivalent, this page delivers verified specifications, functional context, package mapping, real-world use cases, and validated alternative options for industrial-grade 3 V system monitoring.
Technical Context
The ADM706RARZ-REEL implements a precision voltage monitor with 2.63 V ±40 mV threshold and 20 mV hysteresis, guaranteeing valid RESET down to VCC = 1 V. Its internal 1.6 sec watchdog timer clears on any WDI transition and asserts WDO low on timeout.
It integrates a 1.25 V power-fail comparator (PFI/PFO), debounced manual reset (MR) with 70 µA internal pull-up, and dual reset outputs (RESET and RESET) only in ADM708 variants-this part provides RESET only, active low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V ±40 mV - ensures reliable reset assertion during 3 V supply brownout or startup under-spec conditions |
| Reset Pulse Width | 200 ms - provides sufficient hold time for microprocessor stabilization after power-up or recovery |
| Quiescent Current | 100 µA at VCC < 3.6 V - enables long battery life in portable 3 V systems |
| Watchdog Timeout | 1.6 sec - detects firmware lockup without requiring software polling or external timing components |
| Power-Fail Threshold | 1.25 V on PFI - supports early warning of supply collapse via external resistor divider |
| MR Input Pull-Up | 70 µA - allows direct connection to mechanical switch without external biasing |
| VCC Operating Range | 2.7 V to 5.5 V - accommodates 3 V nominal rails with tolerance for ripple and droop |
Pinout & Package
ADM706RARZ-REEL is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, 3.9 mm × 4.9 mm body, 1.27 mm lead pitch, gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | Debounced TTL/CMOS-compatible input; pulled up internally with 70 µA; triggers 200 ms RESET when driven below 0.6 V |
| 2 VCC | Power Supply Input | Primary supply rail (2.7–5.5 V); requires 0.1 µF decoupling capacitor to GND for noise immunity |
| 3 GND | Ground Reference | Common 0 V reference for all analog and digital functions; must be low-impedance connection |
| 4 PFI | Power-Fail Input | Noninverting input to 1.25 V comparator; monitors secondary supply or preregulator via resistive divider |
| 5 PFO | Power-Fail Output | Active-low open-drain output signaling PFI < 1.25 V; sinks ≥1.2 mA at 0.3 V |
| 6 WDI | Watchdog Input | Edge-sensitive input; any transition resets 1.6 sec timer; accepts pulses as narrow as 50 ns |
| 7 RESET | Reset Output | Active-low push-pull output; drives low for 200 ms on VCC drop or MR assertion; valid down to VCC = 1 V |
| 8 WDO | Watchdog Output | Active-low push-pull output; goes low on WDI inactivity >1.6 sec; also forced low when VCC < reset threshold |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63 V reset threshold | Enables accurate supervision of 3 V logic rails without external trimming or calibration |
| Guaranteed RESET validity at VCC = 1 V | Ensures microprocessor remains held in reset during full power-down sequence, preventing undefined states |
| Integrated 1.6 sec watchdog timer | Eliminates need for external RC timing network or separate watchdog IC in space-constrained designs |
| 1.25 V power-fail comparator with PFI/PFO | Allows early detection of supply collapse for orderly shutdown-no additional comparator required |
| Debounced MR input with internal 70 µA pull-up | Supports direct switch connection without external components, reducing BOM count and layout area |
Applications
| Industrial PLC Controller Monitoring | Portable Medical Device Power Management |
|---|---|
Use Scenario: Supervises 3 V core supply in programmable logic controller CPU module during mains fluctuation or backup battery switchover. IC Role / Device Role / Timing Role: Generates 200 ms active-low RESET pulse on VCC brownout and asserts WDO on firmware hang detection. Use Value: Prevents corrupted I/O state and memory writes during unstable power; watchdog enforces fail-safe recovery without host intervention. | Use Scenario: Monitors main Li-ion battery output in handheld diagnostic instrument operating at 3 V nominal. IC Role / Device Role / Timing Role: Uses PFI to detect battery sag below 2.7 V via resistor divider; triggers PFO interrupt for graceful shutdown before cutoff. Use Value: Extends usable battery capacity by enabling controlled data save and display blanking prior to deep discharge. |
| Smart Energy Meter Microcontroller Reset | Automated Test Equipment (ATE) Board-Level Supervision |
Use Scenario: Ensures deterministic boot sequence in utility meter MCU after AC line interruption or transient surge. IC Role / Device Role / Timing Role: Provides power-on reset with 200 ms delay and holds RESET active until 3 V rail stabilizes above 2.63 V. Use Value: Eliminates boot failures caused by slow-rising 3 V supply; meets IEC 62056-21 robustness requirements. | Use Scenario: Guards FPGA configuration integrity on ATE daughterboard powered from shared 3.3 V rail. IC Role / Device Role / Timing Role: Asserts RESET on rail droop and feeds WDO to FPGA's nCONFIG pin to force reconfiguration on watchdog timeout. Use Value: Recovers from stuck configuration state without operator reset; maintains test repeatability across thermal cycles. |
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, 200 ms timeout, but no watchdog timer or PFI/PFO | Lacks power-fail warning and firmware watchdog-suitable only where those features are unused | Select MAX706RCSA+ only if watchdog and PFI functionality are omitted from design; verify MR timing compatibility |
| TPS3808G12DBVR | Adjustable reset threshold (1.22 V to 5.5 V); 200 ms fixed delay; no PFI/PFO; 2.5 µA quiescent current; no watchdog | Ultra-low power but lacks dual-monitoring capability; requires external resistor for threshold setting | Choose TPS3808G12DBVR for battery-critical apps needing sub-µA sleep current; accept loss of PFI/WDT features |
Compared with MAX706RCSA+ and TPS3808G12DBVR, the ADM706RARZ-REEL uniquely combines fixed 2.63 V supervision, integrated watchdog, and power-fail comparator in one SOIC-8 device-enabling single-chip reliability for 3 V microcontroller systems requiring both reset and early-warning capabilities.
Availability
ADM706RARZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical devices, smart energy meters, and automated test equipment requiring stable component supply and long-term lifecycle support.
Supply support for ADM706RARZ-REEL 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 targets cost-sensitive, space-constrained microprocessor systems needing guaranteed reset behavior, watchdog safety, and power-fail warning-all in a single 8-pin SOIC package.
FAQ
What is the reset threshold voltage of the ADM706RARZ-REEL?
The ADM706RARZ-REEL has a precision reset threshold of 2.63 V, with ±40 mV tolerance over temperature and supply. This value is factory-trimmed and applies across the full industrial temperature range (−40°C to +85°C). The threshold is referenced to an internal bandgap, ensuring stability independent of VCC variation. It is specifically optimized for 3 V system supervision, triggering RESET when VCC falls below this level.
Does the ADM706RARZ-REEL include a watchdog timer?
Yes, the ADM706RARZ-REEL includes a fully integrated watchdog timer with a nominal timeout period of 1.6 seconds. The timer resets on any edge (high-to-low or low-to-high) at the WDI pin and asserts the WDO output low upon timeout. WDO is also forced low whenever VCC drops below the 2.63 V reset threshold, ensuring coordinated fault response. No external components are required to configure or operate the watchdog function.
What is the function of the PFI and PFO pins on the ADM706RARZ-REEL?
The PFI (Power-Fail Input) pin connects to a resistive divider monitoring a secondary supply or preregulator, comparing it against an internal 1.25 V reference. When PFI falls below 1.25 V, the PFO (Power-Fail Output) pin goes low, providing an early warning signal for impending power loss. PFO is an active-low, push-pull output capable of sinking 1.2 mA at 0.3 V, and can drive interrupts or trigger controlled shutdown sequences in the host microcontroller.
Can the ADM706RARZ-REEL operate with VCC below 2.7 V?
Yes-the ADM706RARZ-REEL guarantees valid RESET output operation down to VCC = 1 V, as confirmed in the datasheet's "Valid RESET Below 1 V VCC" section. While the specified operating range begins at 2.7 V, the internal reset generator remains functional at lower voltages to ensure the microprocessor stays held in reset during full power decay. For sustained operation below 2.7 V, however, only RESET assertion is guaranteed-not WDI sampling or PFI comparison accuracy.
What package type and RoHS status does the ADM706RARZ-REEL use?
The ADM706RARZ-REEL is supplied in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch and Pb-free (RoHS-compliant) finish. The "R" in the part number denotes SOIC_N, "AR" indicates tape-and-reel packaging, "Z" confirms lead-free construction, and "-REEL" specifies full reel quantity (2,500 units). The device meets Analog Devices' standard environmental compliance requirements including RoHS, REACH, and conflict minerals reporting.
ADM706RARZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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 Low
- Reset Timeout:
- 160ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADM706RARZ-REEL FAQ
1.How can I place an order for ADM706RARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM706RARZ-REEL 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 ADM706RARZ-REEL reliable?
The price and inventory of ADM706RARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM706RARZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM706RARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM706RARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM706RARZ-REEL?
ADM706RARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM706RARZ-REEL 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 ADM706RARZ-REEL?
For technical support, including ADM706RARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM706RARZ-REEL requirements.
6.How does Aetrix verify that ADM706RARZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM706RARZ-REEL 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 ADM706RARZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM706RARZ-REEL?
All ADM706RARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM706RARZ-REEL, 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 ADM706RARZ-REEL part is unused and in its original packaging.
Return procedure for ADM706RARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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