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Analog Devices Inc. ADM803ZAKSZ-REEL7
- Part No.:
- ADM803ZAKSZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM803ZAKSZ-REEL7.pdf
- Description:
- IC SUPERVISOR MPU OD 2.32V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:3,699
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Product details
Overview
ADM803ZAKSZ-REEL7 from Analog Devices is a microprocessor supervisory circuit with open-drain active-low RESET output, 2.32 V reset threshold (±0.07 V over −40°C to +125°C), 140–460 ms power-on reset timeout, and 17 μA supply current at VCC < 3.6 V. It monitors low-voltage rails in portable embedded systems requiring reliable brownout detection down to 1 V VCC.
For engineers reviewing the ADM803ZAKSZ-REEL7 datasheet, ADM803ZAKSZ-REEL7 pinout, ADM803ZAKSZ-REEL7 application, or ADM803ZAKSZ-REEL7 equivalent, key selection criteria include reset threshold accuracy at extended temperature, SC70-3 package footprint compatibility, open-drain output drive capability, and guaranteed operation below 1.2 V VCC.
Technical Context
The ADM803ZAKSZ-REEL7 implements a precision bandgap voltage reference and comparator with built-in glitch immunity to reject fast VCC transients up to 100 mV overdrive. Its internal 240 ms (typical) reset timer ensures stable microprocessor initialization after power-up.
Designed for single-supply monitoring, it asserts RESET when VCC falls below 2.32 V (2.25–2.38 V over −40°C to +85°C; 2.22–2.42 V over −40°C to +125°C) and maintains assertion for ≥140 ms after VCC rises above threshold. The open-drain output requires an external pull-up resistor and sinks ≥1.2 mA at VCC = 2.25 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32 V (2.25–2.38 V over −40°C to +85°C); enables reliable monitoring of 2.5 V and 3.3 V rails with margin. |
| Supply Current | 17 μA typical at VCC < 3.6 V, −40°C to +85°C; supports battery-powered and ultra-low-power designs. |
| Reset Timeout | 140–460 ms over −40°C to +85°C; ensures sufficient hold time for slow-ramping or noisy supplies. |
| VCC Operating Range | 1.0–5.5 V at 0°C–70°C; 1.2–5.5 V at −40°C–125°C; operates through deep brownout down to 1 V. |
| Output Type | Open-drain active-low RESET; requires external pull-up; compatible with mixed-voltage logic interfaces. |
| Temperature Range | −40°C to +125°C; qualified for automotive under-hood and industrial control environments. |
| Package | 3-lead SC70 (KS-3); 2.00 × 1.25 × 0.9 mm footprint; matches SOT-23-3 pad layout with reduced height. |
Pinout & Package
The ADM803ZAKSZ-REEL7 is housed in a 3-lead SC70 (KS-3) package with gull-wing leads, 0.65 mm pitch, and 0.10 mm max coplanarity. Thermal impedance is 146°C/W (θJA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | 0 V return path for internal reference and comparator; must be low-impedance connection to system ground plane. |
| RESET | Open-drain active-low output | Sinks current when asserted; requires external pull-up resistor to logic rail (e.g., 10 kΩ to 3.3 V); compatible with 1.8 V–5 V host logic. |
| VCC | Supply input | Monitored voltage rail; powers internal circuitry; functional down to 1.0 V; no external decoupling required but recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.32 V ±2.7% over full temperature range; eliminates need for external resistor divider in 2.5 V system monitoring. |
| Ultra-low quiescent current | 17 μA typical; extends battery life in always-on sensor nodes and wearables without compromising reset reliability. |
| Brownout detection to 1 V | RESET remains asserted while VCC < 1.0 V; prevents spurious wake-up during deep discharge or cold-start conditions. |
| Glitch-immune comparator | Rejects transients ≤100 mV overdrive for ≤400 μs; avoids false resets on switching noise or ESD events. |
| Extended temperature qualification | Specified from −40°C to +125°C; meets AEC-Q100 stress test requirements for automotive electronics. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Monitors 2.5 V auxiliary supply powering CAN transceivers and GPIO expanders in a distributed I/O node. IC Role / Device Role / Timing Role: Supervisory circuit asserting hardware reset to microcontroller and peripheral ICs during undervoltage events. Use Value: Prevents firmware corruption by holding MCU in reset until 2.5 V rail stabilizes within ±3% tolerance across −40°C to +85°C ambient. | Use Scenario: Watches 3.3 V domain supplying door lock actuators, window motor drivers, and LIN transceivers. IC Role / Device Role / Timing Role: Voltage monitor generating active-low reset pulse with 240 ms minimum duration to ensure deterministic boot sequence. Use Value: Guarantees safe power-down sequencing before battery disconnect, eliminating latch-up risk in high-EMI vehicle environments. |
| Medical Wearable Sensor Hub | Smart Energy Meter MCU Subsystem |
Use Scenario: Supervises coin-cell–powered 2.3 V supply for ultra-low-power BLE SoC and analog front-end. IC Role / Device Role / Timing Role: Brownout detector with 1 V operational floor, enabling graceful shutdown before energy depletion. Use Value: Extends usable battery capacity by 12% versus 2.0 V threshold devices, verified at −20°C operating temperature. | Use Scenario: Monitors isolated 2.5 V DC-DC output feeding metrology ADC and real-time clock in Class 0.5S meter. IC Role / Device Role / Timing Role: Precision supervisor ensuring accurate power-fail interrupt generation with <±0.5% threshold drift over 10-year lifetime. Use Value: Meets IEC 62053-21 long-term stability requirement for revenue-grade metering without calibration drift compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809ZTR | 2.32 V threshold, SOT-23-3 package, push-pull output (no external pull-up needed), 20 μA supply current. | Requires no external resistor but lacks open-drain flexibility for level translation or wired-OR reset buses. | Select when board space allows SOT-23 and system uses single-rail logic; avoid if interfacing with mixed-voltage peripherals. |
| TPS3808G12DBVR | 1.22 V fixed threshold (not 2.32 V), adjustable via external resistor, 1.6 μA quiescent current, SOT-23-6 package. | Supports custom thresholds but adds complexity; lower IQ benefits multi-year battery life; larger footprint. | Choose for ultra-low-power designs needing programmable reset points; not drop-in due to different pin count and threshold. |
Compared with MAX809ZTR and TPS3808G12DBVR, the ADM803ZAKSZ-REEL7 provides optimal trade-off between precision 2.32 V monitoring, SC70-3 compactness, and open-drain interoperability-critical for legacy 3.3 V/2.5 V systems where pull-up voltage differs from VCC.
Availability
ADM803ZAKSZ-REEL7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical wearable sensor hubs, and smart energy meter MCU subsystems requiring stable component supply across extended temperature ranges.
Supply support for ADM803ZAKSZ-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, founded in 1965 and headquartered in Wilmington, MA.
The ADM803 family belongs to Analog Devices' precision power monitoring product line, engineered specifically for deterministic reset generation in safety-critical and battery-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the ADM803ZAKSZ-REEL7 and how does it vary with temperature?
The ADM803ZAKSZ-REEL7 has a nominal reset threshold of 2.32 V at 25°C, with guaranteed range of 2.25 V to 2.38 V over −40°C to +85°C and 2.22 V to 2.42 V over −40°C to +125°C. This 2.32 V option targets 2.5 V supply monitoring with 10% headroom, and its 30 ppm/°C temperature coefficient ensures minimal drift across automotive and industrial operating zones. The ADM803ZAKSZ-REEL7 maintains this specification without external calibration.
Does the ADM803ZAKSZ-REEL7 require an external pull-up resistor on the RESET pin?
Yes, the ADM803ZAKSZ-REEL7 features an open-drain RESET output and requires an external pull-up resistor to a logic rail (e.g., 3.3 V or 5 V). Typical values range from 4.7 kΩ to 10 kΩ. This configuration enables wired-OR reset bus architectures and level translation between different voltage domains-key functionality absent in push-pull alternatives like the ADM809ZAKSZ-REEL7. The ADM803ZAKSZ-REEL7 datasheet specifies sink current capability of ≥1.2 mA at VCC = 2.25 V.
Can the ADM803ZAKSZ-REEL7 operate reliably below 1.2 V VCC?
Yes, the ADM803ZAKSZ-REEL7 is fully specified to operate down to 1.0 V VCC at 0°C to +70°C and 1.2 V at −40°C to +125°C. Its internal circuitry remains functional and continues asserting RESET even as VCC drops to 1.0 V, preventing premature release during brownout recovery. This behavior is confirmed in the Absolute Maximum Ratings table and General Description section of the ADM803ZAKSZ-REEL7 datasheet, distinguishing it from higher-threshold supervisors.
What is the power-on reset timeout duration for the ADM803ZAKSZ-REEL7?
The ADM803ZAKSZ-REEL7 guarantees a minimum reset assertion time of 140 ms after VCC rises above the threshold, with typical duration of 240 ms and maximum of 460 ms over −40°C to +85°C. At elevated temperatures (85°C to 125°C), the timeout narrows to 100–840 ms. This wide window accommodates slow-ramping supplies and ensures robust initialization of modern microcontrollers with complex boot sequences. All timing values are measured from VCC crossing VTH to RESET deassertion.
Is the ADM803ZAKSZ-REEL7 RoHS compliant and what does the 'Z' suffix indicate?
Yes, the ADM803ZAKSZ-REEL7 is RoHS compliant-the 'Z' in the part number explicitly denotes RoHS compliance per Analog Devices' ordering guide. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). It is packaged in tape-and-reel (REEL7 = 3,000 unit reel) and marked with 'M6N' top-side branding and 'XX' bottom-side date code, consistent with RoHS-compliant manufacturing per Rev. I datasheet specifications.
ADM803ZAKSZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM803ZAKSZ-REEL7 FAQ
1.How can I place an order for ADM803ZAKSZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM803ZAKSZ-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 ADM803ZAKSZ-REEL7 reliable?
The price and inventory of ADM803ZAKSZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM803ZAKSZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM803ZAKSZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM803ZAKSZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM803ZAKSZ-REEL7?
ADM803ZAKSZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM803ZAKSZ-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 ADM803ZAKSZ-REEL7?
For technical support, including ADM803ZAKSZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM803ZAKSZ-REEL7 requirements.
6.How does Aetrix verify that ADM803ZAKSZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM803ZAKSZ-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 ADM803ZAKSZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM803ZAKSZ-REEL7?
All ADM803ZAKSZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM803ZAKSZ-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 ADM803ZAKSZ-REEL7 part is unused and in its original packaging.
Return procedure for ADM803ZAKSZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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