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Analog Devices Inc. ADM803RAKSZ-REEL
- Part No.:
- ADM803RAKSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM803RAKSZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,774
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Product details
Overview
ADM803RAKSZ-REEL from Analog Devices is a 3-pin microprocessor supervisory circuit with open-drain active-low RESET output, 2.63 V reset threshold, and operation down to 1.0 V VCC. It delivers 240 ms typical power-on reset timeout, 17 μA supply current at 3.6 V, and operates across −40°C to +125°C for industrial and automotive power monitoring in microcontroller-based systems.
For engineers reviewing the ADM803RAKSZ-REEL datasheet, ADM803RAKSZ-REEL pinout, ADM803RAKSZ-REEL application, or ADM803RAKSZ-REEL equivalent, key selection criteria include reset threshold accuracy (±2.7% over temperature), SC70 package compatibility, open-drain interface requirements, and brownout detection capability below 1.2 V.
Technical Context
The ADM803RAKSZ-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reference circuit maintains stability across −40°C to +125°C, enabling reliable reset assertion during slow-ramp power-up or deep brownout conditions.
Designed exclusively for 3-lead SC70 (KS-3) packaging, it uses a single-supply architecture with GND, VCC, and open-drain RESET terminals-no external components required beyond a pull-up resistor. Reset remains valid down to VCC = 1.0 V, and the comparator tolerates transients up to 100 mV overdrive without false triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V nominal; ±2.7% tolerance over −40°C to +125°C ensures accurate 2.7 V system supply monitoring. |
| Supply Current | 17 μA typical at VCC < 3.6 V and TA = −40°C to +85°C-enables battery-backed or ultra-low-power embedded use. |
| Reset Timeout | 240 ms typical power-on delay; holds microprocessor in reset until supply stabilizes, preventing premature execution. |
| VCC Operating Range | 1.0 V to 5.5 V; guarantees functional reset assertion even during severe brownout or partial power loss. |
| Output Type | Open-drain RESET; requires external pull-up for logic-level compatibility with 1.8 V, 3.3 V, or 5 V host interfaces. |
| Temperature Range | −40°C to +125°C; qualified for under-hood automotive, industrial PLC, and high-reliability embedded applications. |
| Reset Propagation Delay | 20 μs max from VCC crossing threshold to RESET assertion-supports fast-response fault recovery. |
Pinout & Package
ADM803RAKSZ-REEL is housed in a 3-lead SC70 (KS-3) package measuring 2.00 mm × 2.10 mm × 0.95 mm, with gull-wing leads and JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | 0 V return path for internal comparator and timer; must be low-impedance connection to system ground plane. |
| RESET (Pin 2) | Open-drain active-low output | Sinks current when asserted; requires external pull-up resistor (typically 10–100 kΩ) to define logic-high level and drive load capacitance. |
| VCC (Pin 3) | Monitored supply input | Connects directly to the voltage rail being supervised (e.g., 2.7 V microcontroller core supply); powers internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.63 V with ±2.7% total error over full temperature range-eliminates need for external trimming in 2.7 V systems. |
| Ultra-low quiescent current | 17 μA typical enables >10-year battery life in coin-cell-powered IoT sensors and backup supervisors. |
| Brownout detection down to 1.0 V | Guarantees reset remains active during deep undervoltage events, preventing corrupted memory writes or state machine lockup. |
| Glitch-immune comparator | Rejects transients ≤100 mV overdrive for ≥400 μs-immune to switching noise on shared power rails. |
| SC70 footprint compatibility | Enables high-density PCB layouts; matches industry-standard 3-pin SC70 land pattern (JEDEC KS-3). |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 2.7 V microcontroller supply in programmable logic controllers exposed to wide ambient temperature swings and EMI-rich factory environments. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to hold ARM Cortex-M4 in known state during cold-start or line dip. Use Value: 240 ms guaranteed reset pulse prevents firmware crash during 12 V battery sag; SC70 package withstands reflow and thermal cycling per AEC-Q200. | Use Scenario: Embedded in door module ECUs to supervise 2.7 V CAN transceiver and microcontroller supply under stop-start engine conditions. IC Role / Device Role / Timing Role: Voltage monitor detecting brownout below 2.63 V and asserting open-drain RESET to reset MCU before supply collapse. Use Value: Operates down to 1.0 V VCC and −40°C, ensuring fail-safe behavior during cranking; 17 μA current minimizes parasitic drain on 12 V battery. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Secures safety-critical ARM-based pump controller by validating 2.7 V analog front-end and digital core supply integrity. IC Role / Device Role / Timing Role: Resets microcontroller if main 2.7 V LDO output drops below 2.63 V due to capacitor aging or load surge. Use Value: ±2.7% threshold accuracy eliminates false resets from normal supply ripple; RoHS-compliant SC70 supports medical regulatory compliance. | Use Scenario: Supervises 2.7 V real-time clock and metrology IC supply in utility-grade meters deployed outdoors for 15+ years. IC Role / Device Role / Timing Role: Provides tamper-resistant power-on reset and brownout protection for secure boot sequence and flash write operations. Use Value: −40°C to +125°C rating ensures reliability in unventilated meter enclosures; 240 ms timeout accommodates slow AC/DC converter ramp-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809RTRG+T | 2.63 V threshold, SOT-23-3 package, push-pull RESET output, 20 μA supply current | Requires no external pull-up; incompatible with wired-OR reset bus topologies | Select when board layout lacks space for pull-up resistor or interfacing with open-collector interrupt buses |
| TPS3808G12QDBVRQ1 | 1.2 V threshold (not 2.63 V); adjustable via external resistor; 1.5 μA quiescent current; automotive-grade (AEC-Q100) | Not a drop-in replacement-requires redesign of threshold network and timing RC | Choose only when system demands sub-2 V supervision or ultra-low power (<2 μA) and design cycle allows schematic revision |
Compared with MAX809RTRG+T and TPS3808G12QDBVRQ1, the ADM803RAKSZ-REEL uniquely combines SC70 footprint, open-drain output, and precise 2.63 V threshold in a single industrial-temperature device-making it optimal for space-constrained, multi-drop reset architectures where timing and threshold fidelity are critical.
Availability
ADM803RAKSZ-REEL is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM803RAKSZ-REEL 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 Norwood, MA.
The ADM803 series belongs to Analog Devices' microprocessor supervisory product line, engineered specifically for robust, low-power voltage monitoring in harsh-environment embedded systems where deterministic reset behavior is non-negotiable.
FAQ
What is the exact reset threshold voltage of the ADM803RAKSZ-REEL and how does it vary with temperature?
The ADM803RAKSZ-REEL has a nominal reset threshold of 2.63 V at 25°C, with guaranteed limits of 2.52 V to 2.74 V across −40°C to +125°C. This ±2.7% total variation ensures reliable supervision of 2.7 V supplies without false triggering during thermal cycling, as confirmed in Table 1 and Table 3 of the Rev. I datasheet.
Does the ADM803RAKSZ-REEL require an external pull-up resistor, and if so, what value is recommended?
Yes-the ADM803RAKSZ-REEL features an open-drain RESET output and requires an external pull-up resistor. A value between 10 kΩ and 100 kΩ is recommended, depending on bus capacitance and rise-time requirements; 47 kΩ is commonly used for 3.3 V systems with ≤50 pF load, per Figure 12 and Interfacing section of the datasheet.
Can the ADM803RAKSZ-REEL operate reliably during deep brownout conditions below 1.5 V?
Yes-the ADM803RAKSZ-REEL remains fully functional down to VCC = 1.0 V, asserting RESET continuously until VCC rises above 2.63 V and sustaining the 240 ms timeout. This capability is explicitly specified in the "VCC OPERATING VOLTAGE RANGE" row of Table 1 and validated in Figure 2 (Power Fail Reset Timing).
What is the package type and lead finish of the ADM803RAKSZ-REEL?
The ADM803RAKSZ-REEL uses a 3-lead SC70 package (JEDEC KS-3 outline), with RoHS-compliant matte tin lead finish. The "Z" suffix in the part number confirms RoHS compliance, and dimensions are documented in Figure 15 (page 9) of the Rev. I datasheet.
How does the ADM803RAKSZ-REEL differ from the ADM809RAKSZ-REEL and ADM810RAKSZ-REEL in terms of output configuration?
The ADM803RAKSZ-REEL has an open-drain RESET output requiring an external pull-up, while the ADM809RAKSZ-REEL and ADM810RAKSZ-REEL feature push-pull outputs. Specifically, ADM809 asserts active-low RESET and ADM810 asserts active-high RESET-both drive high/low actively without external components, unlike the ADM803RAKSZ-REEL.
ADM803RAKSZ-REEL 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:
- 2.63V
- 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
ADM803RAKSZ-REEL FAQ
1.How can I place an order for ADM803RAKSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM803RAKSZ-REEL 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 ADM803RAKSZ-REEL reliable?
The price and inventory of ADM803RAKSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM803RAKSZ-REEL is usually 5 days.
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Once your ADM803RAKSZ-REEL 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 ADM803RAKSZ-REEL?
For technical support, including ADM803RAKSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM803RAKSZ-REEL requirements.
6.How does Aetrix verify that ADM803RAKSZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM803RAKSZ-REEL 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 ADM803RAKSZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM803RAKSZ-REEL?
All ADM803RAKSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM803RAKSZ-REEL, 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 ADM803RAKSZ-REEL part is unused and in its original packaging.
Return procedure for ADM803RAKSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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