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Analog Devices Inc. ADM803MAKSZ-REEL
- Part No.:
- ADM803MAKSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM803MAKSZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,598
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Product details
Overview
ADM803MAKSZ-REEL from Analog Devices is a microprocessor supervisory circuit in 3-lead SC70 package, featuring open-drain active-low RESET output, 4.38 V reset threshold, 17 μA supply current, and 240 ms typical power-on reset timeout. It monitors VCC down to 1 V and asserts reset during power-up, brownout, and power-down in embedded microcontroller systems.
For engineers reviewing the ADM803MAKSZ-REEL datasheet, ADM803MAKSZ-REEL pinout, ADM803MAKSZ-REEL application, or ADM803MAKSZ-REEL equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), open-drain output requiring external pull-up, low-power operation for battery-backed systems, and SC70 footprint compatibility with space-constrained PCB layouts.
Technical Context
The ADM803MAKSZ-REEL integrates 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 reliable system initialization under marginal supply conditions.
Unlike push-pull variants (ADM809/ADM810), the ADM803MAKSZ-REEL uses an open-drain RESET output, mandating an external pull-up resistor for logic-level translation and enabling wired-OR reset bus configurations across multiple supervisors or peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38 V (typical at 25°C); ±2.5% tolerance over −40°C to +125°C ensures stable reset activation across industrial temperature range. |
| Supply Current | 17 μA (typical at VCC < 3.6 V, −40°C to +85°C); enables integration into always-on, ultra-low-power monitoring circuits. |
| VCC Operating Range | 1.0 V to 5.5 V; allows supervision of 1.8 V, 2.5 V, 3.3 V, and 5 V rails without external level-shifting. |
| Reset Timeout | 240 ms (typical); holds microprocessor in reset long enough for power supply stabilization and clock circuit lock. |
| Output Type | Open-drain active-low RESET; supports flexible voltage translation via external pull-up and multi-source reset arbitration. |
| Package | 3-lead SC70 (KS-3); 2.0 mm × 2.1 mm footprint ideal for compact portable and IoT endpoint designs. |
| Reset Validity | Functional down to VCC = 1.0 V; guarantees deterministic reset behavior during deep brownout or controlled power-down sequences. |
Pinout & Package
ADM803MAKSZ-REEL is housed in a 3-lead SC70 (KS-3) package with gull-wing leads, JEDEC-compliant outline, and 0.65 mm lead pitch. Thermal impedance is 146°C/W (θJA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and timer; must be connected to system ground plane for accurate threshold sensing. |
| 2 | RESET | Open-drain active-low output; requires external pull-up resistor (typically 10 kΩ) to target logic rail (e.g., 3.3 V or 5 V). |
| 3 | VCC | Monitored supply input; powers internal circuitry and serves as reference for reset threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.38 V with ±2.5% max variation over −40°C to +125°C - eliminates need for external trimming in industrial control applications. |
| Ultra-low quiescent current | 17 μA typical - extends battery life in coin-cell–powered sensors and wearable devices requiring continuous supervision. |
| Brownout immunity | Valid reset assertion down to VCC = 1.0 V - prevents spurious release during slow discharge or undershoot events. |
| Glitch-immune comparator | Immune to fast transients ≤100 mV amplitude - avoids false resets caused by switching noise on shared power rails. |
| SC70 footprint | 2.0 mm × 2.1 mm body size - enables high-density placement in space-limited modules such as smart meters and edge AI accelerators. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
|
Use Scenario: Monitors 3.3 V logic supply in a DIN-rail mounted programmable logic controller exposed to wide ambient temperature swings and EMI-rich factory environments. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 MCU during cold start and line sags. Use Value: 240 ms fixed timeout ensures firmware boot completes only after 3.3 V rail stabilizes; 4.38 V threshold matches nominal 3.3 V ±5% spec with margin for ripple. |
Use Scenario: Ensures fail-safe restart of microcontroller in battery-powered infusion pump where power interruption must trigger immediate motor shutdown and alarm. IC Role / Device Role / Timing Role: Open-drain RESET output wired-OR'd with watchdog timer output to guarantee reset initiation on either fault condition. Use Value: 17 μA supply current minimizes drain on primary LiMnO₂ cell; 1.0 V VCC operation maintains reset integrity until battery reaches end-of-life cutoff. |
| Automotive Telematics Unit | Smart Energy Meter |
|
Use Scenario: Supervises 5 V supply derived from vehicle battery in LTE-connected telematics gateway operating across −40°C to +105°C ambient. IC Role / Device Role / Timing Role: Voltage monitor triggering hardware reset of i.MX6ULL SoC during ignition cycling and load-dump transients. Use Value: Glitch-immune comparator rejects 100 mV spikes from alternator noise; SC70 package withstands reflow and thermal cycling per AEC-Q200 requirements. |
Use Scenario: Provides power-on reset for metrology SoC in ANSI C12.22–compliant electricity meter with tamper-detection circuitry. IC Role / Device Role / Timing Role: Resets microcontroller upon AC-to-DC converter startup and during backup supercapacitor switchover. Use Value: 4.38 V threshold aligns with 3.3 V LDO output under worst-case dropout; RoHS-compliant (Z-suffix) version meets global environmental compliance mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM809MAKSZ-REEL | Same 4.38 V threshold and SC70 package, but push-pull active-low RESET output (no external pull-up required). | Suitable where board layout prohibits adding pull-up resistor or where faster rise time is needed. | Select when simplifying BOM and reducing component count outweighs need for wired-OR capability. |
| TPS3123QDBVRQ1 | 4.38 V threshold, SOT-23-3, push-pull active-low RESET, automotive-grade (−40°C to +125°C), 24 μA supply current. | Designed for automotive qualification (AEC-Q100 Grade 1); lacks SC70 option and brownout operation below 1.8 V. | Choose for automotive production programs requiring IATF 16949 traceability and extended reliability testing. |
Compared with ADM803MAKSZ-REEL, ADM809MAKSZ-REEL removes external component dependency but sacrifices reset bus flexibility, while TPS3123QDBVRQ1 adds automotive qualification at the cost of higher quiescent current and reduced sub-1.8 V functionality.
Availability
ADM803MAKSZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, automotive telematics units, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ADM803MAKSZ-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 for deterministic power-on reset generation, brownout protection, and low-power system monitoring in harsh industrial and medical environments.
FAQ
What is the reset threshold voltage of the ADM803MAKSZ-REEL?
The ADM803MAKSZ-REEL has a nominal reset threshold of 4.38 V at 25°C, with guaranteed tolerance of ±2.5% over the full industrial temperature range (−40°C to +125°C). This value is confirmed in Table 3 and specifications section of the ADM803/ADM809/ADM810 datasheet Rev. I, and applies specifically to the "M" variant denoting the 4.38 V option.
Does the ADM803MAKSZ-REEL require an external pull-up resistor?
Yes, the ADM803MAKSZ-REEL features an open-drain RESET output and requires an external pull-up resistor to the target logic rail (e.g., 3.3 V or 5 V). Typical values range from 4.7 kΩ to 10 kΩ. This is explicitly stated in the General Description and Pin Function Descriptions sections of the datasheet.
What is the power-on reset timeout duration for the ADM803MAKSZ-REEL?
The ADM803MAKSZ-REEL provides a typical power-on reset timeout of 240 ms, with a minimum of 140 ms and maximum of 460 ms over −40°C to +85°C. This timing is generated by an internal timer and is independent of external components, ensuring consistent boot sequencing across operating conditions.
Can the ADM803MAKSZ-REEL operate with supply voltages below 3.3 V?
Yes, the ADM803MAKSZ-REEL operates with VCC as low as 1.0 V while maintaining functional reset assertion - a key feature documented in the General Description and Absolute Maximum Ratings table. This enables reliable supervision during deep brownout or battery-depletion scenarios.
Is the ADM803MAKSZ-REEL RoHS compliant?
Yes, the "Z" suffix in ADM803MAKSZ-REEL indicates RoHS compliance per EU Directive 2011/65/EU. This is confirmed in the Ordering Guide footnote ("Z = RoHS Compliant Part") and applies to both SC70 packaging and material content.
ADM803MAKSZ-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:
- 4.38V
- 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
ADM803MAKSZ-REEL FAQ
1.How can I place an order for ADM803MAKSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM803MAKSZ-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 ADM803MAKSZ-REEL reliable?
The price and inventory of ADM803MAKSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM803MAKSZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM803MAKSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM803MAKSZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM803MAKSZ-REEL?
ADM803MAKSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM803MAKSZ-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 ADM803MAKSZ-REEL?
For technical support, including ADM803MAKSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM803MAKSZ-REEL requirements.
6.How does Aetrix verify that ADM803MAKSZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM803MAKSZ-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 ADM803MAKSZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM803MAKSZ-REEL?
All ADM803MAKSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM803MAKSZ-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 ADM803MAKSZ-REEL part is unused and in its original packaging.
Return procedure for ADM803MAKSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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