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Analog Devices Inc. ADM8316WDZ30ARJZR7
- Part No.:
- ADM8316WDZ30ARJZR7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM8316WDZ30ARJZR7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,456
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Product details
Overview
ADM8316WDZ30ARJZR7 from Analog Devices is a supervisory circuit with watchdog timer and manual reset, designed for microprocessor supply voltage monitoring in automotive and industrial systems. It features a 3.0 V reset threshold, 1120 ms minimum reset timeout, 25.6 sec typical watchdog timeout, −40°C to +125°C operating range, and 5-lead SOT-23 package.
For engineers reviewing the ADM8316WDZ30ARJZR7 datasheet, ADM8316WDZ30ARJZR7 pinout, ADM8316WDZ30ARJZR7 application, or ADM8316WDZ30ARJZR7 equivalent, key selection criteria include reset threshold accuracy (±1.5% over temperature), push-pull active-low RESET output drive capability (1.2 mA sink at 2.7 V), low 10 µA supply current, and automotive qualification per AEC-Q100.
Technical Context
The ADM8316WDZ30ARJZR7 integrates a precision voltage monitor, programmable watchdog timer, and manual reset input into a single 5-pin SOT-23 device. Its internal factory-trimmed voltage divider sets a nominal 3.0 V reset threshold with ±1.5% tolerance across −40°C to +125°C and 20 ppm/°C temperature coefficient.
It implements a fixed 1120 ms minimum reset timeout and 25.6 sec typical watchdog timeout (suffix Z), with push-pull active-low RESET output guaranteed valid down to VCC = 0.9 V. The WDI input accepts 50 ns minimum pulses and clears the watchdog on any logic transition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.0 V ±1.5% over −40°C to +125°C - ensures reliable brownout detection for 3.3 V systems |
| Reset Timeout | 1120 ms minimum - provides sufficient power stabilization delay before releasing processor reset |
| Watchdog Timeout | 25.6 sec typical (suffix Z) - enables long-duration software execution monitoring without spurious resets |
| Supply Current | 10 µA at 5.5 V - supports ultra-low-power portable and battery-backed applications |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and harsh industrial environments |
| Output Type | Active-low push-pull RESET - drives directly into microprocessor reset pin without external pull-up |
| WDI Pulse Width | 50 ns minimum - accommodates fast microcontroller GPIO toggling for low-current watchdog strobing |
Pinout & Package
ADM8316WDZ30ARJZR7 is housed in a 5-lead SOT-23 (RJ-5) package with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and 1.1 mm max height - compatible with standard high-volume PCB assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Asserts low during VCC undervoltage, MR assertion, or watchdog timeout; sinks 1.2 mA at 2.7 V |
| 2 - GND | Ground reference | Primary return path for internal circuitry and RESET output current |
| 3 - MR | Active-low manual reset input | Internal 75 kΩ pull-up; 1 µs minimum pulse width; 350 ns MR-to-RESET propagation delay at 5 V |
| 4 - WDI | Watchdog input | Clears watchdog timer on any logic transition; 35–100 µA input current; 50 ns minimum pulse width |
| 5 - VCC | Monitored supply voltage input | Input range 0.9 V to 5.5 V; reset asserted when VCC falls below 3.0 V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified - meets reliability and test requirements for automotive infotainment and control modules |
| Reset threshold accuracy | ±1.5% over full temperature range - eliminates need for external trimming in production systems |
| Glitch-immune MR input | 100 ns glitch rejection - prevents false resets from EMI or switch bounce without external RC filtering |
| VCC-to-RESET delay | 90 µs at 1 mV/µs VCC fall rate - ensures deterministic reset assertion timing during fast transients |
| Low-voltage operation | Valid RESET output down to VCC = 0.9 V - supports reset assertion during deep brownout conditions |
Applications
| Automotive Infotainment Systems | Industrial Microcontroller Modules |
|---|---|
Use Scenario: Power sequencing and fault recovery in head-unit mainboards with multi-rail supplies. IC Role / Device Role / Timing Role: Supervises 3.3 V core rail; asserts reset if voltage drops below 3.0 V or software hangs; manual reset via front-panel button. Use Value: Prevents corrupted boot sequences after cold crank or load dump events; 25.6 sec watchdog timeout matches firmware initialization time. |
Use Scenario: Reliable restart of PLC I/O controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Monitors 3.3 V system rail; generates reset on undervoltage or unresponsive firmware; operates from −40°C to +125°C. Use Value: Ensures deterministic recovery from brownout-induced lockups; 1120 ms reset timeout allows full capacitor recharge before MCU release. |
| Medical Diagnostic Equipment | Telematics Control Units |
Use Scenario: Safety-critical boot validation in portable ultrasound processors with battery backup. IC Role / Device Role / Timing Role: Provides power-on reset and runtime watchdog supervision of ARM Cortex-M7; MR input tied to service mode switch. Use Value: Guarantees known state after power interruption; 10 µA quiescent current extends battery life during standby. |
Use Scenario: Reset management in LTE-connected vehicle gateways subject to automotive electrical transients. IC Role / Device Role / Timing Role: Supervises 3.3 V communication subsystem; detects firmware stalls during OTA updates using 25.6 sec watchdog window. Use Value: Eliminates need for external RC reset circuits; push-pull output drives automotive-grade reset inputs directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8320WCZ29ARJZR7 | Open-drain RESET output; 2.93 V reset threshold; same 25.6 sec watchdog and 140 ms reset timeout | Requires external pull-up resistor; suited for level-shifting or wired-OR reset bus configurations | Select when system requires open-drain reset for shared reset lines or mixed-voltage domains |
| TPS3808G30DBVR | 3.0 V reset threshold; 200 ms reset timeout; no watchdog; 1.8–6 V VCC range; SOT-23-5 package | Lacks watchdog functionality; lower quiescent current (1.5 µA); no manual reset input | Select when only basic voltage monitoring is needed and watchdog/manual reset are not required |
Compared with ADM8316WDZ30ARJZR7, ADM8320WCZ29ARJZR7 offers identical watchdog timing but requires external biasing for RESET, while TPS3808G30DBVR reduces cost and power but removes critical safety features - making ADM8316WDZ30ARJZR7 optimal for automotive and industrial systems requiring full supervision.
Availability
ADM8316WDZ30ARJZR7 is available at Aetrix Electronics and suitable for automotive infotainment, industrial microcontroller modules, medical diagnostic equipment, and telematics control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ADM8316WDZ30ARJZR7 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The ADM8316WDZ30ARJZR7 belongs to the ADM8316/ADM8322 family of automotive-qualified supervisory circuits, engineered specifically for robust power monitoring and code-execution integrity in safety-critical microprocessor systems.
FAQ
What is the reset threshold voltage of the ADM8316WDZ30ARJZR7?
The ADM8316WDZ30ARJZR7 has a nominal reset threshold voltage of 3.0 V, with a tolerance of ±1.5% over the full operating temperature range of −40°C to +125°C. This value is factory-trimmed and specified in Table 9 of the datasheet under Reset Threshold Number 30. The threshold remains stable with a temperature coefficient of 20 ppm/°C.
Does the ADM8316WDZ30ARJZR7 include a watchdog timer, and what is its timeout?
Yes, the ADM8316WDZ30ARJZR7 includes a watchdog timer with a typical timeout of 25.6 seconds (suffix Z). This value is confirmed in the "Reset Threshold, Minimum Reset Timeout, and Typical Watchdog Timeout Options" table on page 16 of Rev. D datasheet. The watchdog is cleared by any logic transition on the WDI pin and asserts RESET if no transition occurs within the timeout period.
What type of reset output does the ADM8316WDZ30ARJZR7 provide?
The ADM8316WDZ30ARJZR7 provides an active-low push-pull RESET output (Pin 1), as confirmed in Figure 3 and Table 3 of the datasheet. It can sink up to 1.2 mA at 2.7 V and source 500 µA at 2.7 V, eliminating the need for an external pull-up resistor in most microprocessor interface applications.
Is the ADM8316WDZ30ARJZR7 qualified for automotive use?
Yes, the ADM8316WDZ30ARJZR7 is qualified for automotive applications, indicated by the "W" prefix in its ordering code and explicit listing in the Automotive Products section (page 16). It meets AEC-Q100 Grade 1 requirements and is specified over −40°C to +125°C with controlled manufacturing for reliability in automotive environments.
What are the key timing parameters for manual reset operation in the ADM8316WDZ30ARJZR7?
The ADM8316WDZ30ARJZR7 requires a minimum MR input pulse width of 1 µs and provides 350 ns MR-to-RESET propagation delay at VCC = 5 V. Its MR input includes integrated 100 ns glitch rejection and a 75 kΩ internal pull-up resistor, enabling direct connection to a push-button switch without external components.
ADM8316WDZ30ARJZR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Watchdog Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM8316WDZ30ARJZR7 FAQ
1.How can I place an order for ADM8316WDZ30ARJZR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8316WDZ30ARJZR7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of ADM8316WDZ30ARJZR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8316WDZ30ARJZR7 is usually 5 days.
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5.How can I obtain technical support or documentation for ADM8316WDZ30ARJZR7?
For technical support, including ADM8316WDZ30ARJZR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8316WDZ30ARJZR7 requirements.
6.How does Aetrix verify that ADM8316WDZ30ARJZR7 is sourced from the original manufacturer or authorized distributors?
All ADM8316WDZ30ARJZR7 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 ADM8316WDZ30ARJZR7 meets industry standards.
7.What is the process for return or replacement of ADM8316WDZ30ARJZR7?
All ADM8316WDZ30ARJZR7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8316WDZ30ARJZR7, 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 ADM8316WDZ30ARJZR7 part is unused and in its original packaging.
Return procedure for ADM8316WDZ30ARJZR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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