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Analog Devices Inc. ADM8698AN
- Part No.:
- ADM8698AN
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADM8698AN.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,384
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Product details
Overview
ADM8698AN from Analog Devices is a microprocessor supervisory circuit designed for 5 V power supply monitoring in embedded systems. It provides guaranteed RESET assertion down to VCC = 1 V, precision 4.65 V voltage threshold with 40 mV hysteresis, 140–280 ms reset pulse width, and operates across –40°C to +85°C. It is used in industrial controllers and critical microprocessor power-up sequencing.
For engineers reviewing the ADM8698AN datasheet, ADM8698AN pinout, ADM8698AN application, or ADM8698AN equivalent, this page delivers verified functional identity, package mapping (8-pin plastic DIP, N-8), reset timing behavior, low-voltage reset guarantee, and real-world substitution guidance - all grounded in Analog Devices' official specifications.
Technical Context
The ADM8698AN implements a precision bandgap-based voltage detector with fixed 4.65 V trip point and built-in 40 mV hysteresis to prevent noise-induced false resets. Its internal monostable generates a minimum 140 ms active-low RESET pulse on power-up, power-down, and brown-out events.
No watchdog functionality is present - unlike the ADM8699, the ADM8698AN lacks WDI input, WDO output, and watchdog timeout logic. It is strictly a voltage-monitoring reset generator with no activity supervision capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 3.0 V to 5.5 V - supports nominal 5 V ±10% rails and tolerates undervoltage down to 3 V before reset activation. |
| Reset Threshold | 4.65 V typ (4.5–4.75 V) - precisely tracks 5 V supply tolerance; triggers reset when VCC drops below safe microprocessor operating level. |
| Reset Hysteresis | 40 mV - prevents oscillation during slow VCC recovery by requiring ~4.69 V to deassert reset after assertion. |
| Reset Pulse Width | 140–280 ms min - ensures sufficient duration to fully initialize microprocessors and peripheral ICs at power-on. |
| Supply Current | 70 µA typ - enables use in low-power and battery-backed systems without significant quiescent load. |
| Min VCC for RESET | 1 V - guarantees RESET remains asserted even as VCC collapses, holding µP in known state until full power loss. |
| Output Drive | 0.4 V max @ 3.2 mA sink - compatible with TTL/CMOS inputs; supports direct connection to µP reset pins without pull-up. |
Pinout & Package
ADM8698AN is supplied in an 8-pin plastic DIP package (N-8), with 0.3 inch body width and standard through-hole footprint. Pin 1 is marked by a notch or dot; pin numbering follows standard DIP convention (counterclockwise from top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | +5 V power supply input; monitored for reset generation and powers internal circuitry. |
| 2 | GND | Ground reference for all analog and digital functions; must be low-impedance return path. |
| 3 | RESET | Active-low open-drain reset output; asserts low when VCC < 4.65 V or during power transitions. |
| 4 | NC | No connect - internally unconnected; must remain floating or tied to GND per layout best practice. |
| 5 | NC | No connect - internally unconnected; no external connection required. |
| 6 | NC | No connect - internally unconnected; not used in ADM8698AN variant. |
| 7 | NC | No connect - internally unconnected; reserved for ADM8699 WDI function (not implemented). |
| 8 | GND | Second ground pin - improves noise immunity and thermal dissipation; must be connected to system ground. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET at VCC = 1 V | Ensures microprocessor remains held in reset during complete power collapse, preventing undefined states or partial execution. |
| Precision 4.65 V threshold | Matches standard 5 V ±5% supply tolerance; eliminates need for external resistor divider or calibration. |
| 40 mV hysteresis | Prevents chatter during marginal VCC conditions - e.g., line ripple or transient dips near threshold. |
| 140–280 ms reset pulse | Meets typical microprocessor reset timing requirements (e.g., Intel 80Cxx, ARM Cortex-M0+) without external RC delay. |
| Low 70 µA supply current | Reduces standby power in always-on systems; suitable for battery-buffered or energy-constrained applications. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Power sequencing and brown-out protection in programmable logic controllers exposed to fluctuating 24 V DC converted to 5 V. IC Role / Device Role / Timing Role: Voltage monitor and reset generator ensuring deterministic µP startup and fault-safe shutdown. Use Value: Prevents firmware corruption during line sags by asserting RESET before VCC falls below 4.65 V and holding it until stable recovery. |
Use Scenario: Reset management in automotive interior modules (e.g., door lock ECU) powered from vehicle battery via LDO. IC Role / Device Role / Timing Role: Supervisory circuit detecting battery voltage drop below safe 5 V rail level during cranking or cold start. Use Value: Guarantees µP remains held in reset down to VCC = 1 V, avoiding erratic behavior during deep brown-out events. |
| Medical Diagnostic Instrument | Telecom Remote Terminal Unit |
|
Use Scenario: Power integrity assurance in portable ultrasound or patient monitor systems with backup battery switchover. IC Role / Device Role / Timing Role: Primary reset source coordinating main µP and FPGA initialization after AC/DC or battery transition. Use Value: 140–280 ms reset pulse satisfies strict IEC 62304 boot timing requirements while eliminating external timing components. |
Use Scenario: Reliable restart of remote base station control units subjected to intermittent grid power and lightning-induced transients. IC Role / Device Role / Timing Role: Fault-tolerant reset generator with hysteresis to reject EFT/burst noise on 5 V rail. Use Value: 40 mV hysteresis prevents spurious resets from fast transients, improving system uptime in harsh electromagnetic environments. |
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, 120 µA supply current, same 8-pin DIP package. | Lacks guaranteed reset below 2.5 V; not specified down to 1 V - unsuitable for deep brown-out hold. | Select when lower cost is prioritized and full 1 V reset guarantee is not required. |
| TPS3808G33DBVR | 3.3 V threshold (not 4.65 V), adjustable reset delay, 1.5 µA quiescent current, SOT-23-6 package. | Designed for 3.3 V systems; incompatible pinout and voltage range - requires redesign for 5 V applications. | Choose only for new 3.3 V designs where ultra-low power and small size outweigh compatibility needs. |
Compared with MAX698CPA+ and TPS3808G33DBVR, the ADM8698AN uniquely delivers guaranteed reset assertion at VCC = 1 V in a legacy-compatible 8-pin DIP, making it irreplaceable in fielded 5 V systems requiring fail-safe brown-out response without PCB revision.
Availability
ADM8698AN is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and medical diagnostic instruments requiring stable component supply and long-term obsolescence support.
Supply support for ADM8698AN 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 ADM8698AN belongs to Analog Devices' microprocessor supervisory circuits product line, engineered specifically for deterministic power-on reset, brown-out protection, and robust operation in mission-critical embedded systems.
FAQ
What is the primary function of the ADM8698AN?
The ADM8698AN is a dedicated microprocessor supervisory circuit that monitors a 5 V power supply and generates a precise, timed active-low RESET signal during power-up, power-down, and brown-out conditions. Unlike the ADM8699, the ADM8698AN does not include watchdog functionality - its sole role is voltage threshold detection and reset pulse generation. It guarantees RESET assertion down to VCC = 1 V, ensuring reliable microprocessor hold-down during full power collapse.
Does the ADM8698AN support watchdog timer functionality?
No, the ADM8698AN does not support watchdog timer functionality. Watchdog input (WDI) and watchdog output (WDO) are exclusive to the ADM8699 family. The ADM8698AN contains only voltage monitoring and reset generation circuitry. Its pinout omits WDI entirely, and the internal watchdog transition detector is absent - confirmed by the functional block diagram, pin descriptions, and ordering guide, which list ADM8698 variants separately from ADM8699.
What package type is used for the ADM8698AN?
The ADM8698AN uses an 8-pin plastic DIP package (ordering code N-8), with 0.3 inch body width and through-hole mounting. This matches the industry-standard PDIP-8 footprint and is distinct from the SOIC-8 (R-8) and SOIC-16 (R-16) variants listed for other ADM8698/ADM8699 models. Pin 1 is identified by a notch or dot, and pins 1–4 occupy the top row left-to-right, while pins 5–8 occupy the bottom row right-to-left.
What is the minimum VCC voltage at which ADM8698AN guarantees RESET assertion?
The ADM8698AN guarantees RESET remains asserted (low) down to VCC = 1 V - a key differentiator versus many competing supervisors. This is explicitly specified in the "RESET Output Voltage (VCC = 1 V)" parameter table (200 mV max at 100 µA sink), and reinforced in the General Description: "guaranteed RESET assertion with VCC = 1 V." This ensures the microprocessor stays held in reset even as the supply collapses completely, preventing undefined execution states.
How does the ADM8698AN handle noise or ripple on the VCC line?
The ADM8698AN mitigates noise susceptibility via 40 mV of built-in hysteresis on its 4.65 V reset threshold. This means VCC must rise to at least ~4.69 V to deassert RESET after a brown-out, preventing chatter caused by ripple or transients near the trip point. Additionally, the datasheet recommends placing a 0.1 µF capacitor at the VCC pin to filter high-frequency noise - a design practice validated in the Typical Application Circuit and Circuit Information section.
ADM8698AN 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, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADM8698AN FAQ
1.How can I place an order for ADM8698AN through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8698AN 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 ADM8698AN reliable?
The price and inventory of ADM8698AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8698AN is usually 5 days.
3.What payment methods are accepted for ADM8698AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8698AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM8698AN?
ADM8698AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8698AN 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 ADM8698AN?
For technical support, including ADM8698AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8698AN requirements.
6.How does Aetrix verify that ADM8698AN is sourced from the original manufacturer or authorized distributors?
All ADM8698AN 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 ADM8698AN meets industry standards.
7.What is the process for return or replacement of ADM8698AN?
All ADM8698AN units undergo pre-shipment inspection (PSI). If there is an issue with ADM8698AN, 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 ADM8698AN part is unused and in its original packaging.
Return procedure for ADM8698AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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