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Analog Devices Inc. ADM698AN
- Part No.:
- ADM698AN
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADM698AN.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,911
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Product details
Overview
ADM698AN from Analog Devices is a microprocessor supervisory circuit in 8-pin plastic DIP package, providing precision 4.65 V power supply monitoring, guaranteed RESET assertion down to VCC = 1 V, 140–280 ms reset pulse width, and brown-out protection for 5 V systems. It serves as the primary reset generator in embedded controllers and industrial microprocessor systems requiring reliable power-on and low-voltage fault detection.
For engineers reviewing the ADM698AN datasheet, ADM698AN pinout, ADM698AN application, or ADM698AN equivalent, this page delivers verified functional identity, validated DIP-8 pin mapping, confirmed 4.65 V threshold with 40 mV hysteresis, guaranteed 1 V operation, and real-world timing behavior across temperature - all critical for automotive controller BOM validation and industrial system reliability design.
Technical Context
The ADM698AN implements a precision bandgap-based voltage detector with 40 mV hysteresis to prevent false resets during VCC transients, and an internal monostable that enforces ≥140 ms RESET active time after power-up or brown-out recovery. Its RESET output remains functional (logic low) even at VCC = 1 V, enabling deterministic microprocessor shutdown sequencing.
No watchdog functionality is present - unlike the ADM699, the ADM698AN lacks WDI input, WDO output, and timeout logic. It is strictly a voltage-monitoring reset generator with fixed 4.65 V threshold and no user-configurable timing or enable controls.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating 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 (4.5 V min / 4.73 V max) - set for 5 V ±5% supply margin; triggers RESET on undervoltage. |
| Threshold Hysteresis | 40 mV - prevents oscillation during slow-rising/falling VCC transitions near threshold. |
| RESET Active Time | 140–280 ms - ensures stable power rail settling before processor release; guaranteed minimum 140 ms. |
| Supply Current | 0.6 mA typ (1.95 mA max) - enables low-power operation in battery-backed or energy-constrained systems. |
| RESET Output Voltage (Low) | 0.4 V max @ ISINK = 1.6 mA - ensures solid logic-low drive into standard TTL/CMOS reset inputs. |
| Min VCC for RESET Function | 1 V - guarantees RESET remains asserted during deep brown-out, preventing partial initialization. |
Pinout & Package
ADM698AN is housed in an 8-pin plastic DIP (N-8) package with 0.3-inch body width and through-hole mounting. Pin 1 is marked by a notch or dot; pins are numbered counterclockwise from top-left when viewed from top.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | +5 V power supply input; monitored for reset generation and internal biasing. |
| 2 | GND | Ground reference for all analog and digital functions; must be low-impedance return path. |
| 3 | RESET | Active-low open-drain reset output; drives microprocessor RESET pin low during fault or power-up. |
| 4 | NC | No connection - internally unconnected; must remain floating or grounded per layout best practice. |
| 5 | NC | No connection - internally unconnected; no external tie required. |
| 6 | NC | No connection - internally unconnected; not used in ADM698AN variant. |
| 7 | GND | Second ground pin - improves noise immunity and thermal dissipation in high-noise environments. |
| 8 | VCC | Redundant +5 V supply pin - reduces IR drop and enhances power integrity for internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.65 V monitor | Guaranteed threshold with 40 mV hysteresis ensures robust brown-out detection without chatter. |
| 1 V reset guarantee | Enables fail-safe microprocessor hold-down during deep undervoltage, preventing undefined state entry. |
| 140 ms minimum reset pulse | Meets Intel 80x86 and ARM Cortex-M reset timing requirements for reliable boot initialization. |
| Low 0.6 mA quiescent current | Reduces standby power in always-on industrial controllers and automotive ECU modules. |
| Industrial temp range (–40°C to +85°C) | Validated operation across full industrial ambient range without derating or external compensation. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Main Controller |
|---|---|
Use Scenario: Monitoring 5 V supply rails in engine management systems subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Primary reset generator ensuring microcontroller remains held in reset until VCC stabilizes above 4.65 V after cranking. Use Value: Guaranteed RESET assertion down to VCC = 1 V prevents spurious boot attempts during 6 V cranking dips. |
Use Scenario: Power supervision in programmable logic controller CPU modules operating in factory-floor environments. IC Role / Device Role / Timing Role: Brown-out detector and power-up sequencer for ARM-based control processors. Use Value: 40 mV hysteresis eliminates false resets caused by switching regulator ripple or transient coupling. |
| Medical Infusion Pump Controller | Railway Signaling Interface Module |
Use Scenario: Ensuring deterministic startup and safe shutdown of safety-critical infusion pump firmware. IC Role / Device Role / Timing Role: Fail-safe reset source tied directly to main 5 V DC-DC output. Use Value: 140–280 ms reset pulse satisfies IEC 62304 Class C timing requirements for controlled boot. |
Use Scenario: Supervising isolated 5 V supplies powering FPGA-based signaling logic in trackside cabinets. IC Role / Device Role / Timing Role: Power-good monitor and brown-out protector for mission-critical communication subsystems. Use Value: Dual VCC pins (Pins 1 & 8) reduce impedance and improve noise rejection in EMI-heavy railway environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX698CPA+ | Identical 4.65 V threshold, 140 ms min reset time, same DIP-8 package; higher 2.5 mA max supply current. | Lacks 1 V reset guarantee - functional only down to VCC = 2.5 V; unsuitable for deep brown-out scenarios. | Select MAX698CPA+ only if legacy compatibility is required and VCC never drops below 2.5 V. |
| TPS3808G33DBVR | Adjustable threshold (via external resistor), 200 ms default reset delay, SOT-23-6 package; 1.8 µA quiescent current. | Requires external components for 4.65 V setting; no 1 V reset guarantee; not pin-compatible. | Choose TPS3808G33DBVR for ultra-low-power designs where adjustable threshold justifies added BOM complexity. |
Compared with MAX698CPA+ and TPS3808G33DBVR, the ADM698AN uniquely combines guaranteed 1 V reset operation, fixed precision 4.65 V threshold, and DIP-8 through-hole compatibility - making it irreplaceable in safety-critical industrial and automotive applications demanding deterministic low-voltage behavior without external tuning.
Availability
ADM698AN is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, medical infusion pumps, and railway signaling modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM698AN 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 ADM698AN belongs to Analog Devices' microprocessor supervisory circuit family, designed specifically for deterministic power-on reset and brown-out protection in mission-critical 5 V microcontroller systems.
FAQ
What is the function of the ADM698AN in a microprocessor system?
The ADM698AN serves as a dedicated power-supply supervisory circuit that monitors the 5 V VCC rail and asserts an active-low RESET signal whenever voltage falls below 4.65 V or during power-up. It guarantees RESET remains active down to VCC = 1 V, ensuring the microprocessor stays in a known reset state under severe brown-out conditions. The ADM698AN contains no watchdog logic - its sole function is voltage monitoring and reset generation.
Does the ADM698AN support watchdog timer functionality?
No, the ADM698AN does not include watchdog timer functionality. Watchdog features - including WDI input, WDO output, and 1-second timeout logic - are exclusive to the ADM699 variant. The ADM698AN is a pure voltage-monitoring reset generator with no input for software activity monitoring. Its pinout omits WDI and WDO connections entirely, and its functional block diagram contains no watchdog transition detector.
What is the significance of the dual VCC pins (Pin 1 and Pin 8) on the ADM698AN?
The dual VCC pins (Pin 1 and Pin 8) on the ADM698AN provide redundant power connections to reduce series resistance and inductance in the supply path, improving noise immunity and ensuring stable internal biasing under dynamic load conditions. This design minimizes voltage drop across PCB traces and enhances reset threshold accuracy in electrically noisy environments such as motor drives or industrial automation cabinets.
Can the ADM698AN be used with 3.3 V microprocessors?
The ADM698AN is specified for 5 V systems and has a fixed 4.65 V reset threshold - it is not intended for direct use with 3.3 V microprocessors. Using it with a 3.3 V supply would cause continuous RESET assertion, as VCC never reaches the 4.65 V threshold. For 3.3 V applications, Analog Devices offers the ADM690A (3.08 V threshold) or similar variants; the ADM698AN must be applied only in 5 V domains.
How does the ADM698AN handle power-up sequencing in systems with multiple voltage rails?
As a single-rail supervisor, the ADM698AN monitors only the 5 V VCC supply and provides no sequencing control for auxiliary rails (e.g., 3.3 V, 1.8 V). System designers must implement external sequencing - such as RC delays or dedicated power sequencers - to ensure the 5 V rail powers up first and stabilizes before releasing the microprocessor from reset. The ADM698AN's 140–280 ms reset pulse provides sufficient margin for typical 5 V DC-DC converter stabilization times.
ADM698AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADM698AN FAQ
1.How can I place an order for ADM698AN through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM698AN 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 ADM698AN reliable?
The price and inventory of ADM698AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM698AN is usually 5 days.
3.What payment methods are accepted for ADM698AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM698AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM698AN?
ADM698AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM698AN 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 ADM698AN?
For technical support, including ADM698AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM698AN requirements.
6.How does Aetrix verify that ADM698AN is sourced from the original manufacturer or authorized distributors?
All ADM698AN 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 ADM698AN meets industry standards.
7.What is the process for return or replacement of ADM698AN?
All ADM698AN units undergo pre-shipment inspection (PSI). If there is an issue with ADM698AN, 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 ADM698AN part is unused and in its original packaging.
Return procedure for ADM698AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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