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Analog Devices Inc. ADM1816-R22ART-RL7
- Part No.:
- ADM1816-R22ART-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM1816-R22ART-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,863
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Product details
Overview
ADM1816-R22ART-RL7 from Analog Devices is a precision low-power microprocessor reset circuit with open-drain output and internal 5.5 kΩ pull-up resistor, designed to monitor 2.5 V supply rails. It asserts an active-low reset signal when VCC falls below 2.18 V (typical), maintains reset for 150 ms (typical) after power-up, and operates across −40°C to +105°C - used in industrial controllers requiring reliable brownout protection.
For engineers reviewing the ADM1816-R22ART-RL7 datasheet, ADM1816-R22ART-RL7 pinout, ADM1816-R22ART-RL7 application, or ADM1816-R22ART-RL7 equivalent, key selection criteria include its 2.18 V trip point, 150 ms reset timeout, SC70/SOT-23 package compatibility, and open-drain interface with integrated pull-up for direct MCU reset input connection without external components.
Technical Context
The ADM1816-R22ART-RL7 implements a bandgap-based voltage reference with comparator and 150 ms monostable delay circuit to ensure safe system initialization. Its internal 5.5 kΩ pull-up enables immediate high-level assertion on power-up while maintaining compatibility with standard open-drain reset inputs.
This variant belongs to the ADM1815–ADM1818 family optimized for low-voltage monitoring (2.18 V to 3.06 V), features no manual reset pin, and uses a fixed threshold - unlike ADM1813/ADM1818 which support push-button reset. It draws only 4 µA at 3.6 V, enabling battery-backed operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.12 V (min), 2.18 V (typ), 2.25 V (max) - ensures reliable detection of 2.5 V rail collapse before logic corruption |
| Reset Timeout | 100–250 ms - guarantees sufficient power stabilization time before releasing reset to CPU |
| Supply Range | 1.2 V to 5.5 V - supports operation even during deep brownout conditions |
| Quiescent Current | 4 µA at 3.6 V - enables multi-year battery life in always-on monitoring applications |
| Output Type | Open-drain with 3.5–7.5 kΩ internal pull-up - eliminates need for external resistor in most MCU reset circuits |
| Operating Temp | −40°C to +105°C - qualified for under-hood automotive and industrial control environments |
| Propagation Delay | 10 µs (falling edge), 100–250 ms (rising edge) - fast fault response with controlled release timing |
Pinout & Package
ADM1816-R22ART-RL7 is supplied in a 3-lead SOT-23 (RT-3) package, measuring 2.90 mm × 1.30 mm × 1.02 mm, with gull-wing leads and JEDEC TO-236-AB compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Pulled low during undervoltage; floats high (via internal 5.5 kΩ) when valid - connects directly to ARM Cortex-M or PIC reset pins |
| VCC | Supply voltage input | Monitored rail input; also powers internal circuitry - must be same rail as system VDD being protected |
| GND | Ground reference | 0 V return path for both monitoring comparator and output stage - requires low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.18 V threshold | Accurately targets 2.5 V supply monitoring with ±3% tolerance over temperature - avoids false resets during ripple or transient dips |
| 150 ms reset timeout | Guarantees stable power delivery before processor release - prevents boot failure in DC-DC converter startup sequences |
| Internal pull-up resistor | 5.5 kΩ typical value enables direct interface to 3.3 V or 5 V MCU reset inputs without external components or level-shifting |
| Ultra-low supply current | 4 µA at 3.6 V allows integration into energy-sensitive nodes like smart sensor transmitters or backup power supervisors |
| Wide temperature range | −40°C to +105°C operation supports deployment in motor drives, PLC I/O modules, and automotive body control units |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Monitors 2.5 V auxiliary supply powering CAN transceivers and analog front-ends in programmable logic controller racks. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to ARM Cortex-M4F MCU upon rail collapse. Use Value: Prevents spurious CAN frame transmission during brownout by holding MCU in reset until 2.5 V rail stabilizes for ≥150 ms. | Use Scenario: Supervises 2.5 V domain supplying door module microcontrollers and LIN transceivers. IC Role / Device Role / Timing Role: Reset generator with precise 2.18 V threshold ensuring deterministic restart after battery voltage sag during cold-cranking. Use Value: Eliminates need for external pull-up resistor, reducing BOM count and PCB area in space-constrained door modules. |
| Medical Sensor Hub | Smart Energy Meter |
Use Scenario: Guards 2.5 V rail feeding ADCs and wireless SoCs in portable patient monitors. IC Role / Device Role / Timing Role: Low-current (4 µA) reset supervisor enabling >5-year battery life in standby mode. Use Value: Maintains system integrity during brief power interruptions without draining primary coin-cell battery. | Use Scenario: Monitors isolated 2.5 V supply powering metrology ASIC and real-time clock in utility meters. IC Role / Device Role / Timing Role: High-temperature (105°C) reset circuit ensuring reliable operation inside sealed meter enclosures. Use Value: Guarantees clean boot sequence after grid voltage recovery, preventing corrupted kWh accumulation registers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326-L21T | 2.13 V threshold, 140 ms timeout, 1.2 µA quiescent current, SOT-23-3 | Lacks internal pull-up - requires external resistor for open-drain interface | Select when ultra-low current (<2 µA) is critical and board space allows external component |
| TPS3808G12DBVR | 1.22 V threshold, adjustable via external resistor, 200 ms timeout, 1.1 µA current | Adjustable threshold enables fine-tuning but adds complexity and cost | Choose when system requires programmable trip point or tighter tolerance than ±3% |
Compared with MAX6326-L21T and TPS3808G12DBVR, ADM1816-R22ART-RL7 offers integrated pull-up and fixed 2.18 V accuracy ideal for cost-sensitive, space-constrained 2.5 V rail supervision - trading adjustability and sub-µA current for simplicity and guaranteed timing behavior.
Availability
ADM1816-R22ART-RL7 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for ADM1816-R22ART-RL7 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 ADM181x series was engineered specifically for robust, low-cost microprocessor reset functionality in harsh environments - emphasizing precision threshold accuracy, wide temperature operation, and minimal external component count.
FAQ
What is the exact reset threshold voltage of ADM1816-R22ART-RL7?
The ADM1816-R22ART-RL7 has a guaranteed reset threshold of 2.12 V (minimum), 2.18 V (typical), and 2.25 V (maximum) across −40°C to +105°C. This 2.18 V nominal trip point is factory-trimmed and specified in Table 1 of the Rev. F datasheet for the R22 variant, making it suitable for supervising 2.5 V power rails with margin against noise and drift.
Does ADM1816-R22ART-RL7 require an external pull-up resistor?
No, ADM1816-R22ART-RL7 does not require an external pull-up resistor. It integrates a 3.5 kΩ to 7.5 kΩ internal pull-up on the RST pin, enabling direct connection to standard microcontroller reset inputs. This eliminates BOM items and layout complexity - confirmed in the "INTERNAL PULL-UP RESISTOR" section of the datasheet for ADM1816 devices.
Can ADM1816-R22ART-RL7 be used with a manual reset button?
No, ADM1816-R22ART-RL7 does not support manual reset button functionality. Only ADM1813 and ADM1818 variants include push-button detect circuitry. The ADM1816-R22ART-RL7 is a dedicated voltage monitor with fixed threshold and no external trigger input - as stated in the "ADM1811 AND ADM1816" theory-of-operation section.
What package type is used for ADM1816-R22ART-RL7?
ADM1816-R22ART-RL7 uses the 3-lead SOT-23 (RT-3) package, per the Ordering Guide on page 9 of the Rev. F datasheet. Its dimensions are 2.90 mm × 1.30 mm × 1.02 mm, with gull-wing leads and JEDEC TO-236-AB compliance - distinct from the SC70 (KS-3) option used in ADM1816-R22AKSZ-RL7.
What is the reset timeout duration of ADM1816-R22ART-RL7?
The ADM1816-R22ART-RL7 provides a reset timeout of 100 ms (minimum), 150 ms (typical), and 250 ms (maximum) after VCC rises above the threshold. This delay ensures stable power delivery before releasing the reset signal - documented in the "RESET ACTIVE TIME" row of Table 1 and verified in Figure 6 ("Power-Up Reset Timeout vs. Temperature").
ADM1816-R22ART-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.18V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADM1816-R22ART-RL7 FAQ
1.How can I place an order for ADM1816-R22ART-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1816-R22ART-RL7 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 ADM1816-R22ART-RL7 reliable?
The price and inventory of ADM1816-R22ART-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1816-R22ART-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1816-R22ART-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1816-R22ART-RL7 transactions.
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4.How is shipping managed for ADM1816-R22ART-RL7?
ADM1816-R22ART-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1816-R22ART-RL7 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 ADM1816-R22ART-RL7?
For technical support, including ADM1816-R22ART-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1816-R22ART-RL7 requirements.
6.How does Aetrix verify that ADM1816-R22ART-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1816-R22ART-RL7 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 ADM1816-R22ART-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1816-R22ART-RL7?
All ADM1816-R22ART-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1816-R22ART-RL7, 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 ADM1816-R22ART-RL7 part is unused and in its original packaging.
Return procedure for ADM1816-R22ART-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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