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Analog Devices Inc. ADM707ARZ
- Part No.:
- ADM707ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM707ARZ.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:788
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Product details
Overview
ADM707ARZ from Analog Devices is a low-cost microprocessor supervisory circuit designed for 5 V supply monitoring in embedded systems. It provides active-high and active-low reset outputs, a 4.65 V precision voltage threshold, 200 ms reset pulse width, and power-fail detection via PFI/PFO. It is used in industrial controllers to ensure reliable boot-up and brownout recovery.
For engineers reviewing the ADM707ARZ datasheet, ADM707ARZ pinout, ADM707ARZ application, or ADM707ARZ equivalent, key selection criteria include guaranteed RESET validity down to 1 V VCC, debounced manual reset input (MR), absence of watchdog timer (distinguishing it from ADM705/ADM706), and SOIC-8 packaging with RoHS compliance.
Technical Context
The ADM707ARZ implements dual-reset logic: an active-low RESET output and an active-high RESET output, both asserted when VCC falls below 4.65 V or MR is pulled low. Its internal 1.25 V reference enables precise power-fail detection via the PFI comparator, driving PFO low when PFI < 1.25 V.
No watchdog timer is integrated-unlike ADM705/ADM706-making it suitable for systems requiring only supply supervision and manual reset without activity monitoring. The device operates across −40°C to +85°C and draws only 190 µA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65 V ±150 mV - triggers reset during power-up, brownout, or shutdown of 5 V rails |
| Reset Pulse Width | 200 ms typical - ensures microprocessor stabilization before release from reset | Supply Current | 190 µA typical - enables low-power operation in battery-backed or energy-sensitive systems |
| VCC Validity Range | 1.0 V to 5.5 V - guarantees functional RESET output even during deep undervoltage conditions |
| Power-Fail Detection | 1.25 V PFI threshold - supports external resistive divider for monitoring auxiliary supplies or preregulator inputs |
| Manual Reset Input | TTL/CMOS-compatible MR with 250 µA internal pull-up - accepts switch or logic-level assertion without external bias |
| Output Drive Strength | RESET sinks 1.2 mA at 0.4 V; RESET sources 800 µA at VCC−1.5 V - interfaces directly with most 5 V microcontrollers |
Pinout & Package
ADM707ARZ is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch, 5.00 mm × 3.99 mm body, and gull-wing leads. Thermal resistance θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Manual Reset Input | Debounced TTL/CMOS input; pulling below 0.8 V asserts both RESET and RESET for ≥200 ms |
| 2 (VCC) | Power Supply Input | 5 V nominal supply rail; requires 0.1 µF decoupling capacitor to GND for noise immunity |
| 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 auxiliary supply via external resistor divider |
| 5 (PFO) | Power-Fail Output | Active-low open-drain output signaling PFI < 1.25 V; can interrupt MCU or drive MR for cascaded reset |
| 6 (NC) | No Connect | Internally unconnected; must remain floating or tied to GND (not VCC) |
| 7 (RESET) | Active-Low Reset Output | Push-pull output asserted low during VCC undervoltage or MR activation; drives standard 5 V logic |
| 8 (RESET) | Active-High Reset Output | Inverted complement of RESET; eliminates need for external inverter in active-high reset systems |
Key Features
| Feature | Design Value |
|---|---|
| Dual reset polarity outputs | Simultaneous active-high (RESET) and active-low (RESET) signals eliminate external level-shifting components |
| Guaranteed reset below 1 V VCC | Ensures deterministic microprocessor hold-down during full power-rail collapse, critical for safe shutdown sequences |
| Debounced manual reset input | 200 ms internal timing prevents false resets from mechanical switch bounce or transient noise on MR |
| Precision 1.25 V PFI comparator | Enables accurate early-warning power-fail detection for preregulator monitoring or multi-rail systems |
| Low quiescent current (190 µA) | Minimizes standby power draw in always-on or battery-buffered applications such as smart sensors and RTUs |
Applications
| Industrial PLCs | Medical Diagnostic Equipment |
|---|---|
|
Use Scenario: Monitoring 5 V system rail in programmable logic controllers exposed to voltage sags and EMI-rich factory environments. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET/RESET during brownouts and providing PFO-triggered firmware-initiated graceful shutdown. Use Value: Prevents corrupted I/O state or firmware lockup by enforcing clean restart after undervoltage events exceeding 200 ms. |
Use Scenario: Ensuring safe power sequencing and fault response in portable ultrasound or patient monitor mainboards. IC Role / Device Role / Timing Role: Dual-polarity reset generator coordinating CPU, FPGA, and ADC power domains; PFI monitors backup battery voltage. Use Value: Enables fail-safe transition to battery power with early low-battery warning via PFO, meeting IEC 60601-1 safety requirements. |
| Telecom Remote Terminal Units | Automotive Body Control Modules |
|
Use Scenario: Supervising 5 V supply derived from vehicle battery in roadside communication gateways operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Primary reset supervisor with MR linked to watchdog timeout from host processor; PFO monitors 12 V input via divider. Use Value: Eliminates need for discrete reset IC + comparator + inverter, reducing BOM count and PCB area in space-constrained enclosures. |
Use Scenario: Managing power integrity for microcontroller-based lighting and window control modules subjected to load-dump transients. IC Role / Device Role / Timing Role: Voltage monitor asserting RESET during cranking-induced dips (<4.65 V); RESET drives CAN transceiver enable pin. Use Value: Maintains CAN bus communication integrity by holding transceiver in standby until stable 5 V is confirmed post-cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX707CSA+ | Pin-compatible SO-8; 4.65 V reset threshold; includes watchdog timer (1.6 s timeout) | Requires WDI routing and software toggling; adds complexity where only reset supervision is needed | Select MAX707CSA+ only if watchdog functionality is required; otherwise ADM707ARZ reduces design overhead |
| TPS3808G18DBVR | Adjustable reset threshold (via external resistor); 1.8 V to 5.5 V VCC range; no PFI/PFO | Lacks dedicated power-fail comparator; requires external circuitry for auxiliary supply monitoring | Choose TPS3808G18DBVR for multi-voltage systems needing programmable thresholds, but not for PFI-based early-warning use cases |
Compared with MAX707CSA+, ADM707ARZ simplifies layout and firmware by omitting watchdog circuitry; compared with TPS3808G18DBVR, it delivers integrated PFI/PFO functionality without external components-making it optimal for fixed 5 V systems requiring dual-reset polarity and power-fail alerting.
Availability
ADM707ARZ is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic equipment, and telecom remote terminal units requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ADM707ARZ 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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial, and communications markets.
The ADM705–ADM708 family was engineered for cost-sensitive, reliability-critical microprocessor supervision in 5 V systems-emphasizing low-power operation, robust reset timing, and integrated power-fail warning without external components.
FAQ
What is the reset threshold voltage of the ADM707ARZ?
The ADM707ARZ has a precision reset threshold of 4.65 V, with a typical tolerance of ±150 mV. This value is factory-trimmed and specified over the full industrial temperature range (−40°C to +85°C). The ADM707ARZ uses this threshold to assert both RESET and RESET outputs whenever VCC drops below 4.65 V, ensuring consistent behavior across operating conditions. The threshold hysteresis is 40 mV, preventing chatter near the trip point.
Does the ADM707ARZ include a watchdog timer function?
No, the ADM707ARZ does not include a watchdog timer. Unlike the ADM705/ADM706 variants, the ADM707ARZ omits the WDI and WDO pins and associated timing circuitry. Its functional block diagram confirms only reset generation and power-fail detection capabilities. This makes the ADM707ARZ appropriate for applications where microprocessor activity monitoring is handled externally or not required-reducing design complexity and pin count.
How does the ADM707ARZ handle power-fail detection?
The ADM707ARZ uses its PFI (Power-Fail Input) pin, connected to an internal 1.25 V comparator, to detect falling voltage on auxiliary supplies. When the voltage at PFI drops below 1.25 V, the PFO (Power-Fail Output) pin goes low. This signal can trigger an interrupt or be wired to MR to initiate a system reset. The ADM707ARZ datasheet specifies PFI input current as ±25 nA, enabling high-impedance resistive dividers for minimal loading-critical for accurate monitoring of sensitive or high-impedance nodes.
Can the ADM707ARZ operate with supply voltages below 4.65 V?
Yes, the ADM707ARZ remains fully functional down to VCC = 1.0 V. Its RESET and RESET outputs are guaranteed to maintain valid logic levels (low for RESET, high for RESET) even at 1 V, enabling controlled shutdown sequencing. This capability is verified across temperature and process corners. Below 1 V, internal drive strength diminishes; the ADM707ARZ datasheet recommends adding an external pull-down resistor on RESET if extended sub-1 V hold-down is required.
What package type and RoHS status does the ADM707ARZ have?
The ADM707ARZ is supplied in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch and gull-wing leads. The "Z" suffix in ADM707ARZ explicitly denotes RoHS compliance per Analog Devices' ordering guide. It is compatible with standard reflow profiles for lead-free assembly and carries no exemptions under EU RoHS Directive 2011/65/EU.
ADM707ARZ 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:
- 4.65V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 160ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADM707ARZ FAQ
1.How can I place an order for ADM707ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM707ARZ 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 ADM707ARZ reliable?
The price and inventory of ADM707ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM707ARZ is usually 5 days.
3.What payment methods are accepted for ADM707ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM707ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM707ARZ?
ADM707ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM707ARZ 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 ADM707ARZ?
For technical support, including ADM707ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM707ARZ requirements.
6.How does Aetrix verify that ADM707ARZ is sourced from the original manufacturer or authorized distributors?
All ADM707ARZ 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 ADM707ARZ meets industry standards.
7.What is the process for return or replacement of ADM707ARZ?
All ADM707ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM707ARZ, 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 ADM707ARZ part is unused and in its original packaging.
Return procedure for ADM707ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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