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Analog Devices Inc. ADM811RARTZ-REEL
- Part No.:
- ADM811RARTZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
ADM811RARTZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,410
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Product details
Overview
ADM811RARTZ-REEL from Analog Devices is a precision microprocessor supervisory circuit in SOT-143 package, providing active-low reset assertion at 2.63 V threshold (±0.05 V), 140 ms minimum reset timeout, and 5 µA typical supply current over −40°C to +85°C. It monitors 2.5 V supply rails in embedded controllers and safety-critical instrumentation.
For engineers reviewing the ADM811RARTZ-REEL datasheet, ADM811RARTZ-REEL pinout, ADM811RARTZ-REEL application, or ADM811RARTZ-REEL equivalent, this device delivers guaranteed reset validity down to VCC = 1 V, manual reset debouncing with 10 µs minimum pulse width, and glitch immunity against 100 ns transients - critical for reliable power-on and brownout recovery in industrial control systems.
Technical Context
The ADM811RARTZ-REEL implements a precision bandgap voltage reference with 30 ppm/°C temperature coefficient and internal reset timer logic. Its reset generator asserts RESET low while VCC remains below 2.63 V or during MR assertion, holding active for ≥140 ms after VCC exceeds threshold.
It features a debounced manual reset input tolerant of switch bounce and EMI, with input thresholds scaling to 0.7 × VCC (rising) and 0.25 × VCC (falling). The open-drain RESET output sinks 1.2 mA at 0.3 V and supports direct interfacing to 3 V/5 V microcontrollers without external level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V (typical), ±0.05 V over −40°C to +85°C - ensures deterministic reset initiation on 2.5 V rail degradation. |
| Reset Timeout | 140 ms minimum - provides sufficient stabilization time for microcontrollers and peripherals after power-up. |
| Supply Current | 5 µA typical at VCC < 3.6 V - enables use in battery-backed or ultra-low-power systems. |
| Operating Range | 1.2 V to 5.5 V supply - supports valid reset assertion even as VCC falls to 1.2 V (−40°C to +85°C). |
| Manual Reset Pulse | 10 µs minimum width, 100 ns glitch rejection - eliminates false triggers from mechanical switch bounce or noise. |
| RESET Output | Active-low open-drain, 0.3 V max at 1.2 mA sink - directly drives standard CMOS inputs and allows wired-OR configuration. |
| Temperature Range | −40°C to +85°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
ADM811RARTZ-REEL is housed in a JEDEC-compliant 4-lead SOT-143 (RA-4) package, 2.90 mm × 1.40 mm × 0.90 mm, with gull-wing leads and RoHS-compliant finish (Z suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground Reference | 0 V return path for all internal circuits and reset output; must be connected to system ground plane. |
| 2 RESET | Active-Low Reset Output | Open-drain output asserted low during power-up, brownout, or manual reset; requires external pull-up for logic-high state. |
| 3 MR | Manual Reset Input | Active-low debounced input; accepts pulses ≥10 µs, rejects transients ≤100 ns; float when unused. |
| 4 VCC | Monitored Supply Input | Connects to 2.5 V rail being supervised; decoupling capacitor (0.1 µF) required between VCC and GND. |
Key Features
| Feature | Design Value |
|---|---|
| Precision Voltage Monitoring | 2.63 V threshold with ±0.05 V tolerance over full temperature range - eliminates need for external resistor dividers in 2.5 V systems. |
| Low-Power Supervision | 5 µA typical quiescent current - extends battery life in portable instruments and remote sensors. |
| Brownout-Safe Reset | Valid RESET output asserted down to VCC = 1.2 V - guarantees controlled shutdown during supply collapse. |
| Robust Manual Reset | Hardware-debounced MR input with programmable logic-level thresholds (0.7×VCC / 0.25×VCC) - immune to PCB trace noise and switch bounce. |
| Glitch-Immune Design | Internal filtering rejects 100 ns supply transients - prevents spurious resets in electrically noisy industrial environments. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power sequencing and fault recovery in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Microprocessor supervisory circuit asserting active-low RESET to hold CPU in reset until 2.5 V rail stabilizes post-power-up or recovers from brownout. Use Value: Prevents corrupted firmware execution by guaranteeing ≥140 ms reset hold time and validating reset assertion down to 1.2 V VCC. |
Use Scenario: Reliable restart coordination across multiple ECUs during vehicle ignition cycle and battery voltage sag events. IC Role / Device Role / Timing Role: Voltage monitor for 2.5 V domain powering CAN transceivers and sensor interfaces; RESET output synchronized to power rail integrity. Use Value: Ensures deterministic boot sequence via precise 2.63 V threshold and eliminates false resets from cranking-induced transients using 100 ns glitch immunity. |
| Medical Patient Monitor | Smart Energy Meter |
Use Scenario: Life-critical data acquisition system requiring fail-safe initialization and watchdog-triggered recovery in battery-operated portable units. IC Role / Device Role / Timing Role: Supervisory guard for ARM Cortex-M based controller; RESET output tied to processor's nRESET pin with external 10 kΩ pull-up. Use Value: Enables safe shutdown and restart under low-battery conditions (VCC ≥ 1.2 V) while consuming only 5 µA - extending operational runtime. |
Use Scenario: Tamper-resistant metering platform exposed to grid voltage fluctuations and conducted EMI in utility substations. IC Role / Device Role / Timing Role: Primary reset supervisor for metrology SoC powered from isolated 2.5 V LDO; MR pin connected to tamper-detection switch. Use Value: Guarantees system integrity via debounced MR input (10 µs min pulse) and accurate threshold - preventing erroneous resets during transient line disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811RTR | 2.63 V threshold, same SOT-143 package, but higher 10 µA typical supply current and no guaranteed reset validity below 1.8 V. | Lacks brownout-safe reset below 1.8 V - unsuitable for deep low-voltage recovery in battery-backed systems. | Select ADM811RARTZ-REEL when reset assertion down to 1.2 V and sub-5 µA current are required. |
| TPS3808G12DBVR | 2.63 V threshold, SOT-23-5 package, adjustable reset delay (via capacitor), but 8 µA typical current and no manual reset input. | Requires external timing capacitor and lacks hardware MR - increases BOM count and reduces field-serviceability. | Choose ADM811RARTZ-REEL for integrated MR, fixed 140 ms timeout, and smaller 4-pin footprint in space-constrained designs. |
Compared with MAX811RTR and TPS3808G12DBVR, ADM811RARTZ-REEL uniquely combines ultra-low 5 µA current, guaranteed 1.2 V reset validity, and fully integrated debounced manual reset in a 4-pin SOT-143 - optimizing reliability and board area in industrial and medical 2.5 V systems.
Availability
ADM811RARTZ-REEL 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 ADM811RARTZ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM811/ADM812 family was designed specifically for robust microprocessor supervision in harsh environments - delivering accurate voltage monitoring, low-power operation, and noise-immune reset generation for industrial, automotive, and medical systems.
FAQ
What is the exact reset voltage threshold for ADM811RARTZ-REEL and its tolerance over temperature?
The ADM811RARTZ-REEL has a nominal reset threshold of 2.63 V at 25°C, with a guaranteed range of 2.55 V to 2.70 V over the full −40°C to +85°C operating temperature range. This 2.63 V setting is optimized for monitoring 2.5 V supply rails with 5% margin, and the 30 ppm/°C temperature coefficient ensures minimal drift across thermal extremes. The ADM811RARTZ-REEL maintains this specification without external components.
Does ADM811RARTZ-REEL support manual reset functionality, and what are its electrical requirements?
Yes, ADM811RARTZ-REEL includes a dedicated MR (manual reset) pin that accepts active-low signals. It guarantees recognition of pulses ≥10 µs and rejects glitches ≤100 ns. Input thresholds scale with VCC: rising-edge detection at 0.7 × VCC and falling-edge at 0.25 × VCC, enabling reliable operation across varying supply levels. When unused, MR must be left floating - no pull-up or pull-down is required. This feature is integral to the ADM811RARTZ-REEL design.
What is the minimum VCC level at which ADM811RARTZ-REEL continues to assert a valid RESET output?
The ADM811RARTZ-REEL asserts a valid low-level RESET output down to VCC = 1.2 V over the full −40°C to +85°C temperature range. At VCC ≥ 1.0 V, the output guarantees ≤0.3 V at 1.2 mA sink current. Below 1.0 V, the part ceases to drive the output actively, but the 140 ms timeout ensures system stability before VCC collapses further. This behavior is explicitly characterized and guaranteed for ADM811RARTZ-REEL.
How does the reset timeout period of ADM811RARTZ-REEL behave across temperature and supply voltage?
The ADM811RARTZ-REEL guarantees a minimum reset timeout of 140 ms after VCC rises above the 2.63 V threshold, with typical values up to 560 ms depending on VCC and temperature. Figure 6 in the datasheet shows this variation: timeout remains stable across −40°C to +85°C and is independent of VCC once above threshold. This fixed minimum ensures reliable microprocessor initialization regardless of ambient conditions - a core specification of the ADM811RARTZ-REEL.
Is ADM811RARTZ-REEL RoHS-compliant, and what does the 'Z' suffix indicate?
Yes, ADM811RARTZ-REEL is RoHS-compliant, as confirmed by the 'Z' suffix in its ordering code. Per the Analog Devices ordering guide, 'Z' denotes full compliance with EU RoHS Directive 2011/65/EU, including restrictions on lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE. The device uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 - making ADM811RARTZ-REEL suitable for lead-free reflow assembly and environmentally regulated markets.
ADM811RARTZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- 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:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
ADM811RARTZ-REEL FAQ
1.How can I place an order for ADM811RARTZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM811RARTZ-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 ADM811RARTZ-REEL reliable?
The price and inventory of ADM811RARTZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM811RARTZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM811RARTZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM811RARTZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM811RARTZ-REEL?
ADM811RARTZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM811RARTZ-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 ADM811RARTZ-REEL?
For technical support, including ADM811RARTZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM811RARTZ-REEL requirements.
6.How does Aetrix verify that ADM811RARTZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM811RARTZ-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 ADM811RARTZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM811RARTZ-REEL?
All ADM811RARTZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM811RARTZ-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 ADM811RARTZ-REEL part is unused and in its original packaging.
Return procedure for ADM811RARTZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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