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Analog Devices Inc. ADM803MAKS-REEL7
- Part No.:
- ADM803MAKS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM803MAKS-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,403
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Product details
Overview
ADM803MAKS-REEL7 from Analog Devices is a microprocessor supervisory circuit with open-drain active-low RESET output, 4.38 V reset threshold, and operation down to 1.0 V VCC. It provides 240 ms (typical) power-on reset timeout, consumes only 17 μA at 3.6 V, and is housed in a 3-lead SC70 package for space-constrained embedded systems.
For engineers reviewing the ADM803MAKS-REEL7 datasheet, ADM803MAKS-REEL7 pinout, ADM803MAKS-REEL7 application, or ADM803MAKS-REEL7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), guaranteed operation below 1 V VCC, open-drain output requiring external pull-up, and SC70 thermal performance (θJA = 146°C/W).
Technical Context
The ADM803MAKS-REEL7 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 brownout detection in low-voltage microcontroller systems.
Unlike push-pull variants (ADM809/ADM810), the ADM803MAKS-REEL7 uses an open-drain RESET output, mandating an external pull-up resistor for logic-level compatibility. Its reset threshold of 4.38 V is specified across −40°C to +125°C with ±0.05 V max deviation and 30 ppm/°C temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRESET Threshold | 4.38 V nominal, ±0.05 V over −40°C to +125°C - ensures stable reset activation for 4.5 V nominal supplies with margin. |
| Supply Current | 17 μA typical at VCC < 3.6 V - enables battery-powered and ultra-low-power applications. |
| VCC Operating Range | 1.0 V to 5.5 V - supports reset assertion during deep brownout and full supply recovery. |
| Reset Timeout | 240 ms typical power-on delay - holds microprocessor in reset until supply stabilizes post-power-up. |
| Output Type | Open-drain RESET - requires external pull-up; compatible with mixed-voltage I/O domains. |
| Temperature Range | −40°C to +125°C - qualified for automotive under-hood and industrial control environments. |
| Package | 3-lead SC70 (KS-3) - 2.0 mm × 2.1 mm footprint, 146°C/W θJA, suitable for high-density PCB layouts. |
Pinout & Package
ADM803MAKS-REEL7 is housed in a 3-lead SC70 (KS-3) package per JEDEC standard, with 0.65 mm lead pitch and coplanarity ≤0.10 mm. Thermal resistance θJA = 146°C/W enables operation in thermally constrained spaces without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry; must be connected to system ground plane for noise immunity and accurate threshold sensing. |
| 2 | RESET | Active-low open-drain output; sinks current when asserted; requires external pull-up resistor (typically 10 kΩ to VCC or higher voltage rail). |
| 3 | VCC | Monitored supply input; powers internal comparator and timer; also serves as reference for reset threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.38 V ±0.05 V over full temperature range - eliminates need for external trimming in 4.5 V supply monitoring. |
| Ultra-low quiescent current | 17 μA typical - extends battery life in portable instrumentation and remote sensors. |
| Brownout detection down to 1.0 V | Guaranteed RESET assertion at VCC ≥1.0 V - prevents erratic MCU behavior during supply collapse. |
| Glitch-immune comparator | Immune to transients ≤100 mV overdrive for ≤400 μs - rejects switching noise without external filtering. |
| SC70 footprint | 2.0 mm × 2.1 mm body size - saves >40% board area vs. SOT-23 while maintaining same pinout compatibility. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 5 V system rail in programmable logic controllers exposed to wide ambient temperatures and EMI-rich factory floors. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 during power-up, brownout, and shutdown sequences. Use Value: 240 ms fixed timeout ensures deterministic boot timing; 1.0 V VCC operation prevents spurious resets during transient dips caused by motor switching. |
Use Scenario: Embedded in door module electronics where 5 V supply may sag during window motor actuation or cold-cranking. IC Role / Device Role / Timing Role: Voltage monitor triggering MCU reset before undervoltage lockout causes firmware corruption. Use Value: 4.38 V threshold aligns with automotive 4.5 V nominal rail tolerance; −40°C to +125°C rating meets AEC-Q100 Grade 1 requirements. |
| Medical Patient Monitor | IoT Edge Sensor Node |
Use Scenario: Ensures safe startup of dual-core MCU in battery-backed vital sign analyzer with strict FDA-relevant boot integrity requirements. IC Role / Device Role / Timing Role: Primary reset supervisor coordinating power sequencing between analog front-end and digital subsystems. Use Value: 17 μA supply current minimizes battery drain during standby; open-drain output allows flexible pull-up to isolated 3.3 V domain. |
Use Scenario: Powers long-life environmental sensor node using coin cell or energy harvesting, where supply voltage varies widely. IC Role / Device Role / Timing Role: Low-voltage detector initiating graceful shutdown and nonvolatile state save before VCC falls below operational minimum. Use Value: Operation down to 1.0 V enables full utilization of battery discharge curve; SC70 package reduces PCB real estate for miniaturized enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM809MAKS-REEL7 | Push-pull RESET output, same 4.38 V threshold and SC70 package - no external pull-up required. | Eliminates BOM component and layout routing for pull-up; better for high-noise environments where floating nodes are unacceptable. | Select when system I/O voltage matches VCC and pull-up resistor placement is undesirable. |
| TPS3808G18DBVR | Texas Instruments part with 1.8 V threshold, 350 ms timeout, and 2.5 μA quiescent current - different threshold and timing profile. | Targeted at lower-voltage SoCs (e.g., 1.8 V core rails); not a functional substitute for 4.38 V monitoring. | Consider only if redesigning for sub-2 V supply supervision; not drop-in for ADM803MAKS-REEL7's 4.38 V use case. |
Compared with ADM809MAKS-REEL7, ADM803MAKS-REEL7 trades pull-up dependency for greater I/O flexibility across voltage domains; compared with TPS3808G18DBVR, it delivers precise 4.38 V detection with proven automotive-grade thermal stability but higher supply current.
Availability
ADM803MAKS-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical patient monitors, and IoT edge sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM803MAKS-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.
The ADM803/ADM809/ADM810 family was engineered specifically for robust, low-power microprocessor supervision in harsh environments - emphasizing precision threshold stability, ultra-low current, and guaranteed operation down to 1 V VCC.
FAQ
What is the reset threshold voltage of the ADM803MAKS-REEL7?
The ADM803MAKS-REEL7 has a nominal reset threshold voltage of 4.38 V, with a maximum deviation of ±0.05 V across the full operating temperature range of −40°C to +125°C. This value is confirmed in Table 3 and Table 1 of the official Analog Devices datasheet Rev. I, making ADM803MAKS-REEL7 suitable for monitoring 4.5 V nominal power rails with adequate margin against tolerance drift.
Does the ADM803MAKS-REEL7 require an external pull-up resistor?
Yes, the ADM803MAKS-REEL7 features an open-drain RESET output and requires an external pull-up resistor to establish a defined logic-high level when deasserted. A typical value is 10 kΩ connected between the RESET pin and the target I/O voltage rail. This requirement is explicitly stated in the General Description and Pin Function Descriptions sections of the ADM803/ADM809/ADM810 datasheet.
What is the minimum VCC voltage at which ADM803MAKS-REEL7 guarantees RESET assertion?
The ADM803MAKS-REEL7 guarantees RESET assertion down to VCC = 1.0 V, as specified in the "VCC OPERATING VOLTAGE RANGE" row of Table 1 (Rev. I datasheet). This capability ensures reliable brownout detection even during severe supply sags, distinguishing it from many competitors that cease operation above 1.5 V.
Is ADM803MAKS-REEL7 RoHS compliant?
Yes, ADM803MAKS-REEL7 is RoHS compliant. Per the Ordering Guide footnote "1 Z = RoHS Compliant Part", the "Z" suffix in the full part number (though omitted in the base ordering code ADM803MAKS-REEL7) confirms compliance. Analog Devices' official documentation and distributor listings (e.g., Digi-Key, Mouser) verify RoHS-6 compliance for this SC70 variant.
What is the power-on reset timeout duration for ADM803MAKS-REEL7?
The ADM803MAKS-REEL7 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 (Table 1, "RESET ACTIVE TIMEOUT PERIOD"). This fixed internal timer ensures the microprocessor remains held in reset long enough for supply stabilization and clock circuit readiness before release.
ADM803MAKS-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:
- 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
ADM803MAKS-REEL7 FAQ
1.How can I place an order for ADM803MAKS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM803MAKS-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 ADM803MAKS-REEL7 reliable?
The price and inventory of ADM803MAKS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM803MAKS-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM803MAKS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM803MAKS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM803MAKS-REEL7?
ADM803MAKS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM803MAKS-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 ADM803MAKS-REEL7?
For technical support, including ADM803MAKS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM803MAKS-REEL7 requirements.
6.How does Aetrix verify that ADM803MAKS-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM803MAKS-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 ADM803MAKS-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM803MAKS-REEL7?
All ADM803MAKS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM803MAKS-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 ADM803MAKS-REEL7 part is unused and in its original packaging.
Return procedure for ADM803MAKS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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