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Analog Devices Inc. ADM803SAKS-REEL7
- Part No.:
- ADM803SAKS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM803SAKS-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,911
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Product details
Overview
ADM803SAKS-REEL7 from Analog Devices is a microprocessor supervisory circuit in 3-lead SC70 package, featuring open-drain active-low RESET output, 2.93 V reset threshold (±2.5% over −40°C to +125°C), 17 μA supply current, and 240 ms typical power-on reset timeout. It monitors VCC down to 1 V and ensures reliable reset assertion during power-up, brownout, and power-down in embedded controllers.
For engineers reviewing the ADM803SAKS-REEL7 datasheet, ADM803SAKS-REEL7 pinout, ADM803SAKS-REEL7 application, or ADM803SAKS-REEL7 equivalent, key selection criteria include reset threshold accuracy at extended temperature, open-drain interface compatibility with legacy microcontrollers, low quiescent current for battery-backed systems, and SC70 footprint constraints in space-constrained PCB layouts.
Technical Context
The ADM803SAKS-REEL7 implements a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reset assertion remains valid even as VCC drops to 1.0 V, enabling robust operation during deep brownout conditions.
Unlike push-pull variants (ADM809/ADM810), the ADM803SAKS-REEL7 uses an open-drain RESET output requiring an external pull-up resistor-enabling wired-OR configurations and compatibility with mixed-voltage I/O domains such as 3.3 V microcontrollers interfacing to 5 V peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±2.5% (−40°C to +125°C); precisely monitors 3.0 V nominal supplies with margin for ripple and tolerance stack-up. |
| Supply Current | 17 μA typical at VCC < 3.6 V; enables multi-year operation in coin-cell–powered backup circuits. |
| Reset Timeout | 240 ms typical power-on delay; holds microcontroller in reset until power rail stabilizes post-capacitor charging. |
| VCC Operating Range | 1.0 V to 5.5 V; supports reset assertion during deep undervoltage events where other supervisors fail. |
| Output Type | Open-drain active-low RESET; allows level translation and shared reset bus with multiple devices. |
| Temperature Range | −40°C to +125°C; qualified for under-hood automotive, industrial PLC, and high-reliability embedded applications. |
| Package | 3-lead SC70 (KS-3); 2.0 mm × 2.1 mm footprint with 0.65 mm pitch-ideal for compact portable and sensor modules. |
Pinout & Package
ADM803SAKS-REEL7 is housed in a 3-lead SC70 (KS-3) package per JEDEC standard, with 0.65 mm lead pitch, 2.0 mm × 2.1 mm body size, and coplanarity ≤0.10 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | 0 V return path for internal comparator and timer; must be connected directly to system ground plane for noise immunity. |
| RESET (Pin 2) | Open-drain active-low output | Sinks current when asserted; requires external pull-up (typically 10 kΩ to VCC_IO) to define logic-high level and enable wired-OR topology. |
| VCC (Pin 3) | Monitored supply input | Connects to the voltage rail being supervised (e.g., 3.0 V domain); powers internal circuitry and determines reset assertion point. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.93 V with ±2.5% max variation over full temperature range-ensures deterministic reset timing without margining overhead. |
| Ultra-low quiescent current | 17 μA typical enables integration into always-on subsystems without compromising battery life. |
| Brownout resilience | Operates down to VCC = 1.0 V-guarantees reset assertion during severe supply sag before controller lockup. |
| Glitch-immune comparator | Rejects fast transients ≤100 μs on VCC (per Figure 11), eliminating false resets from switching noise or ESD coupling. |
| Extended temperature qualification | Specified from −40°C to +125°C-meets AEC-Q100 Grade 1 requirements for automotive engine control units. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 3.0 V auxiliary supply powering CAN transceivers and I/O expanders in programmable logic controllers. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M4 MCU during brownout, with 240 ms timeout ensuring firmware initialization completes before peripheral access. Use Value: Prevents register corruption and bus contention by guaranteeing clean power-up sequence despite 100 mV ripple on 3.0 V rail. | Use Scenario: Supervises 3.3 V domain feeding door module microcontroller and LIN transceiver in harsh under-dash environment. IC Role / Device Role / Timing Role: Open-drain RESET output tied to shared reset bus with EEPROM and sensor ICs; asserts low until VCC exceeds 2.93 V and remains low for 240 ms. Use Value: Enables single-point reset coordination across mixed-voltage components while surviving −40°C cold cranking and +125°C under-hood thermal stress. |
| Medical Patient Monitor | Smart Energy Meter |
Use Scenario: Guards 3.0 V supply to low-power ADC and wireless SoC in battery-operated vital sign recorder. IC Role / Device Role / Timing Role: Resets microcontroller when battery voltage sags below 2.93 V during pulse discharge, using open-drain output compatible with 1.8 V logic interface. Use Value: Extends usable battery capacity by permitting operation down to 1.0 V VCC while maintaining reset integrity-no premature shutdown at 2.5 V. | Use Scenario: Monitors 3.3 V rail powering metrology ASIC and NB-IoT modem in utility-grade electricity meter. IC Role / Device Role / Timing Role: Provides 240 ms power-on reset to ensure accurate timekeeping initialization before metering starts; operates continuously across −25°C to +70°C ambient. Use Value: Eliminates erroneous kWh accumulation due to incomplete boot sequence caused by unstable 3.3 V LDO startup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SASEN-T | 3.00 V threshold (±2.5%), SOT-23-3 package, push-pull output, 20 μA supply current | Requires no external pull-up; incompatible with wired-OR buses; slightly larger footprint than SC70 | Select when board layout permits SOT-23 and system uses dedicated reset line without sharing. |
| TPS3808G30DBVR | 3.0 V threshold (±0.5%), SOT-23-6 package, open-drain output, 1.1 μA supply current, adjustable delay | Lower IQ enables ultra-low-power designs; 6-pin package adds enable and manual reset pins-increasing BOM count and layout area | Select when nanowatt standby and programmable timeout outweigh SC70 size advantage and pin count constraints. |
Compared with MAX809SASEN-T and TPS3808G30DBVR, the ADM803SAKS-REEL7 uniquely balances SC70 miniaturization, open-drain flexibility, and −40°C to +125°C qualification-making it optimal for thermally demanding, space-constrained embedded systems where reset bus sharing and brownout resilience are critical.
Availability
ADM803SAKS-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical patient monitors, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM803SAKS-REEL7 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 ADM803 family was designed specifically for microprocessor supervision in space- and power-constrained embedded systems, emphasizing precision threshold stability, ultra-low IQ, and robust operation down to 1 V VCC.
FAQ
What is the exact reset threshold voltage of ADM803SAKS-REEL7 and how does it vary with temperature?
The ADM803SAKS-REEL7 has a nominal reset threshold of 2.93 V, with guaranteed limits of 2.85 V to 3.00 V over −40°C to +85°C and 2.81 V to 3.05 V over −40°C to +125°C. This 2.5% total variation ensures reliable monitoring of 3.0 V rails across automotive and industrial environments without requiring external calibration. The ADM803SAKS-REEL7 achieves this via a trimmed bandgap reference with 30 ppm/°C temperature coefficient.
Does ADM803SAKS-REEL7 require an external pull-up resistor on its RESET pin?
Yes, ADM803SAKS-REEL7 features an open-drain RESET output and requires an external pull-up resistor to establish the logic-high level. A 10 kΩ resistor to the target I/O voltage (e.g., 3.3 V or 1.8 V) is typical. This configuration enables wired-OR reset buses and voltage-level translation-key advantages over push-pull alternatives like ADM809SAKS-REEL7. Without the pull-up, RESET remains floating when deasserted.
What is the minimum VCC voltage at which ADM803SAKS-REEL7 can still assert RESET?
The ADM803SAKS-REEL7 guarantees RESET assertion down to VCC = 1.0 V across its full operating temperature range (−40°C to +125°C). Below 1.0 V, the internal circuitry ceases to function reliably. This capability ensures fail-safe reset behavior during deep brownout events where competing supervisors (e.g., those requiring ≥1.5 V) would release reset prematurely, risking microcontroller malfunction.
How does the 240 ms reset timeout of ADM803SAKS-REEL7 improve system reliability?
The 240 ms typical power-on reset timeout in ADM803SAKS-REEL7 ensures the monitored microprocessor remains held in reset long enough for all power rails-including decoupled analog supplies and PLL lock times-to stabilize fully. This prevents race conditions during boot, eliminates spurious code execution from marginal VCC, and meets JEDEC JESD78 requirements for reset duration in safety-critical embedded systems. The timeout is internally generated and temperature-compensated.
Is ADM803SAKS-REEL7 RoHS compliant and what packaging format does it ship in?
Yes, ADM803SAKS-REEL7 is RoHS compliant (indicated by the "Z" suffix in the ordering guide) and ships in tape-and-reel format: 3,000 units per reel (REEL7 designation), in a 3-lead SC70 (KS-3) package. The device marking "M06" appears on the top surface, and the bottom may carry date code branding per Analog Devices' standard marking convention for RoHS-compliant SC70 devices.
ADM803SAKS-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM803SAKS-REEL7 FAQ
1.How can I place an order for ADM803SAKS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM803SAKS-REEL7 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 ADM803SAKS-REEL7 reliable?
The price and inventory of ADM803SAKS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM803SAKS-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM803SAKS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM803SAKS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM803SAKS-REEL7?
ADM803SAKS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM803SAKS-REEL7 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 ADM803SAKS-REEL7?
For technical support, including ADM803SAKS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM803SAKS-REEL7 requirements.
6.How does Aetrix verify that ADM803SAKS-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM803SAKS-REEL7 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 ADM803SAKS-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM803SAKS-REEL7?
All ADM803SAKS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM803SAKS-REEL7, 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 ADM803SAKS-REEL7 part is unused and in its original packaging.
Return procedure for ADM803SAKS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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