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Analog Devices Inc. ADM698ARZ
- Part No.:
- ADM698ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADM698ARZ.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,908
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Product details
Overview
ADM698ARZ from Analog Devices is a microprocessor supervisory circuit in 16-lead SOIC package, providing precision 4.65 V power-on/power-down reset assertion, guaranteed RESET functionality down to VCC = 1 V, and 140–280 ms reset pulse width. It monitors +5 V supply rails in embedded controllers and industrial microprocessor systems requiring reliable brown-out protection.
For engineers reviewing the ADM698ARZ datasheet, ADM698ARZ pinout, ADM698ARZ application, or ADM698ARZ equivalent, key selection criteria include its guaranteed 1 V reset hold capability, 40 mV threshold hysteresis for noise immunity, low 0.6 mA quiescent current, and SOIC-specific active-high RESET output - critical for compatibility with processors requiring non-inverted reset signaling.
Technical Context
The ADM698ARZ implements a precision bandgap-based voltage detector with fixed 4.65 V threshold and 40 mV hysteresis to prevent false triggering during VCC transients. Its internal monostable generates a minimum 140 ms RESET pulse on power-up and power-down events.
No watchdog timer or WDI input is present - this is exclusive to the ADM699 variant. The ADM698ARZ provides only RESET (active-low) and RESET (active-high) outputs, both fully specified across –40°C to +85°C with guaranteed operation at VCC as low as 1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.0 V to 5.5 V - supports nominal +5 V systems with ±10% tolerance and brown-out detection down to 3 V. |
| Reset Threshold | 4.65 V typ - precisely tracks 5 V rail; 40 mV hysteresis prevents chatter during marginal supply conditions. |
| Reset Pulse Width | 140–280 ms - ensures full microprocessor initialization and stable clock lock before release. |
| Supply Current | 0.6 mA typ - enables low-power operation in battery-backed or energy-constrained systems. |
| Min VCC for RESET | 1.0 V - guarantees processor remains held in reset during deep undervoltage, preventing undefined state. |
| Output Drive | 0.4 V @ 1.6 mA sink - sufficient to drive TTL/CMOS inputs directly without external pull-ups. |
Pinout & Package
ADM698ARZ is housed in a 16-lead SOIC (R-16) package, 7.60 mm × 10.50 mm body, 1.27 mm pitch, with exposed pad not present. Pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 15, 16 | GND | Ground reference for all analog and digital functions; multiple pins reduce ground impedance. |
| 3, 4, 13 | VCC | +5 V supply input; triple connection improves decoupling path integrity and reduces supply noise coupling. |
| 5 | RESET | Active-low open-drain reset output; requires external pull-up; asserts low during brown-out or power-up. |
| 12 | RESET | Active-high complementary reset output; provided only in SOIC packages for direct µP interface. |
| 6–11, 14 | NC | No-connect pins; must remain unconnected per datasheet to avoid functional interference. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed 1 V RESET hold | Ensures microprocessor remains in known reset state even during severe undervoltage - no risk of partial execution or latch-up. |
| 40 mV reset threshold hysteresis | Eliminates false resets caused by ripple or noise near 4.65 V, improving system robustness in electrically noisy environments. |
| 140–280 ms reset timeout | Meets JEDEC JESD78 requirements for minimum reset duration, ensuring reliable CPU core and peripheral initialization. |
| SOIC-exclusive active-high RESET | Directly interfaces with processors like Intel 80C188, ARM Cortex-M0+, and Renesas RL78 without level-shifting circuitry. |
| Low 0.6 mA quiescent current | Reduces standby power draw in always-on monitoring applications such as automotive ECUs and industrial PLCs. |
Applications
| Industrial PLC Control | Automotive Body Controller |
|---|---|
|
Use Scenario: Monitoring 5 V supply in programmable logic controller I/O modules subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Power-fail supervisor generating synchronized reset pulse to halt firmware execution and preserve register state during undervoltage. Use Value: Guaranteed RESET assertion at VCC = 1 V prevents spurious I/O toggling and relay chatter during battery sag below 6 V. |
Use Scenario: Reset management for microcontrollers in door module ECUs operating across –40°C to +105°C ambient. IC Role / Device Role / Timing Role: Brown-out detector with temperature-stable 4.65 V threshold and hysteresis to reject alternator ripple. Use Value: 40 mV hysteresis eliminates false resets from 100–200 mV supply ripple typical in vehicle electrical systems. |
| Medical Infusion Pump | Network Router Management MCU |
|
Use Scenario: Safety-critical reset supervision for ARM-based pump controller where unintended restart could compromise dose accuracy. IC Role / Device Role / Timing Role: Fail-safe reset generator with monotonic power-up timing and guaranteed low-voltage hold. Use Value: 140–280 ms reset pulse ensures complete RAM initialization and watchdog setup before main firmware executes. |
Use Scenario: Supervising the management microcontroller in enterprise-grade routers during PoE power cycling and hot-swap events. IC Role / Device Role / Timing Role: Dual-output reset supervisor providing both active-low and active-high signals to separate subsystems. Use Value: SOIC-only RESET output enables direct connection to FPGA configuration logic while RESET drives CPU reset line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX698CPA+ | 4.65 V threshold, 200 ms reset pulse, 1.5 mA supply current, DIP-8 only - no SOIC option or active-high output. | Lacks SOIC packaging and complementary RESET output; unsuitable for space-constrained PCBs requiring dual-polarity reset signaling. | Select when legacy DIP footprint is required and active-high reset is unnecessary. |
| TPS3808G18DBVR | 1.8 V threshold (adjustable), 200 ms delay, 1.1 µA quiescent current, SOT-23-6 - not pin-compatible and different voltage range. | Designed for low-voltage systems (1.8–6 V); incompatible with 5 V-only reset timing and threshold requirements of ADM698ARZ. | Select only for new designs targeting ultra-low power and adjustable thresholds - not a drop-in replacement. |
Compared with MAX698CPA+ and TPS3808G18DBVR, the ADM698ARZ uniquely delivers guaranteed 1 V reset hold, SOIC-packaged dual-polarity reset outputs, and 40 mV hysteresis - making it irreplaceable in industrial and automotive 5 V systems demanding fail-safe brown-out response.
Availability
ADM698ARZ is available at Aetrix Electronics and suitable for industrial PLC control, automotive body controllers, and medical infusion pumps requiring stable component supply and long-term lifecycle support.
Supply support for ADM698ARZ 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, headquartered in Norwood, MA.
The ADM698ARZ belongs to Analog Devices' microprocessor supervisory product line, engineered specifically for robust 5 V power monitoring and deterministic reset generation in mission-critical embedded systems.
FAQ
What is the function of the ADM698ARZ in a microprocessor system?
The ADM698ARZ serves as a dedicated power-supply supervisory IC that monitors the +5 V VCC rail and asserts a reset signal whenever voltage drops below 4.65 V (brown-out) or during power-up/down transitions. It guarantees RESET remains active down to VCC = 1 V, ensuring the microprocessor stays in a safe, defined state. The ADM698ARZ does not include a watchdog timer - that feature is exclusive to the ADM699 variant. Its dual RESET outputs (active-low and active-high) simplify interface design across diverse processor families.
Does the ADM698ARZ have a watchdog timer function?
No, the ADM698ARZ does not include a watchdog timer. The watchdog input (WDI) and watchdog output (WDO) are features of the ADM699 family only. The ADM698ARZ provides only voltage monitoring and reset generation. Its functional block diagram, pin configuration, and datasheet specifications explicitly omit WDI and WDO functionality. If watchdog supervision is required, the ADM699ARZ - not the ADM698ARZ - must be selected.
What is the significance of the 40 mV hysteresis in the ADM698ARZ reset threshold?
The 40 mV hysteresis in the ADM698ARZ means the reset deassertion threshold (4.73 V) is 40 mV higher than the assertion threshold (4.65 V). This prevents oscillatory reset behavior when VCC fluctuates near the trip point due to noise or ripple. In real-world applications like automotive or industrial power supplies, this hysteresis ensures clean, single-pulse reset assertion - critical for avoiding repeated microprocessor reboots during marginal supply conditions. The value is tested and guaranteed across temperature.
Can the ADM698ARZ operate reliably at VCC = 1 V?
Yes - the ADM698ARZ is explicitly specified to guarantee RESET output functionality down to VCC = 1 V. At this voltage, the RESET output remains logic low with a maximum voltage of 200 mV when sinking 10 µA, ensuring the connected microprocessor stays held in reset. This capability is verified across the full –40°C to +85°C temperature range and is a key differentiator versus many competing supervisors that lose reset integrity below 2.5 V.
What package type is used for the ADM698ARZ, and why does it matter?
The ADM698ARZ uses a 16-lead SOIC (R-16) package, measuring 7.60 mm × 10.50 mm with 1.27 mm lead pitch. This package enables the inclusion of both active-low RESET and active-high RESET outputs - a feature unavailable in the 8-pin DIP or Cerdip variants. The R-16 layout also distributes GND and VCC across multiple pins to lower impedance and improve noise immunity. For PCB designs requiring compact footprint and dual-polarity reset signaling, the ADM698ARZ's SOIC package is essential - the DIP version (ADM698AN) lacks the second RESET output entirely.
ADM698ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADM698ARZ FAQ
1.How can I place an order for ADM698ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM698ARZ 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 ADM698ARZ reliable?
The price and inventory of ADM698ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM698ARZ is usually 5 days.
3.What payment methods are accepted for ADM698ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM698ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM698ARZ?
ADM698ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM698ARZ 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 ADM698ARZ?
For technical support, including ADM698ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM698ARZ requirements.
6.How does Aetrix verify that ADM698ARZ is sourced from the original manufacturer or authorized distributors?
All ADM698ARZ 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 ADM698ARZ meets industry standards.
7.What is the process for return or replacement of ADM698ARZ?
All ADM698ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM698ARZ, 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 ADM698ARZ part is unused and in its original packaging.
Return procedure for ADM698ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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