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Analog Devices Inc. ADM1816-20ART-RL7
- Part No.:
- ADM1816-20ART-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM1816-20ART-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,610
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Product details
Overview
ADM1816-20ART-RL7 from Analog Devices is a precision 2.55 V (typical) open-drain microprocessor reset circuit with internal 5.5 kΩ pull-up resistor, 150 ms reset timeout, and −40°C to +105°C operating range. It monitors 2.5 V/3 V/3.3 V power rails in space-constrained embedded systems requiring reliable power-on initialization and brownout protection.
For engineers reviewing the ADM1816-20ART-RL7 datasheet, ADM1816-20ART-RL7 pinout, ADM1816-20ART-RL7 application, or ADM1816-20ART-RL7 equivalent, key selection criteria include its 2.55 V trip threshold tolerance (±2.5%), SC70-compatible SOT-23-3 package footprint, open-drain output compatibility with I²C-bus logic levels, and guaranteed reset assertion during supply ramp-up and dropout events.
Technical Context
The ADM1816-20ART-RL7 implements a bandgap-based voltage reference with comparator hysteresis and a precision timing capacitor to generate a fixed 150 ms (typical) reset pulse after VCC rises above 2.55 V. Its internal 5.5 kΩ pull-up enables direct connection to microcontroller reset inputs without external components.
This device belongs to the ADM181x family of supervisory circuits designed for single-supply monitoring in industrial and automotive applications. Unlike push-pull variants, its open-drain output supports wired-OR configurations and mixed-voltage system interfacing while maintaining low quiescent current (≤10 µA at 3.6 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55 V typical (2.47–2.64 V min/max); precisely monitors 2.5 V supply rails with ±2.5% accuracy over temperature. |
| Reset Timeout | 150 ms typical (100–250 ms min/max); ensures stable power rail establishment before processor release. |
| Supply Range | 1.2 V to 5.5 V; operates across wide input voltages while maintaining accurate threshold detection. |
| Quiescent Current | ≤10 µA at 3.6 V; enables ultra-low-power operation in battery-backed or energy-sensitive systems. |
| Output Type | Open-drain with 5.5 kΩ internal pull-up; eliminates need for external resistor and supports multi-drop reset bus architectures. |
| Operating Temp | −40°C to +105°C; qualified for industrial and under-hood automotive environments. |
| Package | SOT-23-3 (RT-3); 2.9 mm × 1.3 mm footprint compatible with high-density PCB layouts. |
Pinout & Package
ADM1816-20ART-RL7 uses a 3-lead SOT-23 (RT-3) package with JEDEC TO-236-AB compliance and 2.9 mm × 1.3 mm body size. Pin 1 is RST (active-low open-drain output), Pin 2 is VCC (monitored supply input), and Pin 3 is GND (0 V reference).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low open-drain reset output | Drives low when VCC < 2.55 V or during power-up/down; floats high via internal 5.5 kΩ pull-up when asserted. |
| VCC | Monitored supply voltage input | Directly connects to 2.5 V/3 V/3.3 V rail; powers internal reference and comparator circuitry. |
| GND | Ground reference terminal | Provides 0 V return path for all internal functions; must be connected to system ground plane for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Internal pull-up resistor | 5.5 kΩ ±30%; eliminates external component count and reduces BOM cost in reset signal conditioning. |
| Reset timeout accuracy | ±33% over temperature (100–250 ms); guarantees safe microprocessor initialization window across full operating range. |
| Low supply current | ≤10 µA at 3.6 V; extends battery life in portable instrumentation and remote sensor nodes. |
| Wide supply range | 1.2 V to 5.5 V; supports legacy 5 V and modern low-voltage SoC designs without redesign. |
| SC70/SOT-23 footprint | Pin-compatible with both packages; enables layout reuse across product generations and thermal profiles. |
Applications
| Industrial PLCs | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Power sequencing in programmable logic controllers where 2.5 V FPGA configuration rails require deterministic reset timing. IC Role / Device Role / Timing Role: Monitors 2.5 V core supply and asserts active-low reset to FPGA until voltage stabilizes for ≥150 ms. Use Value: Prevents configuration corruption during cold-start or transient brownout by enforcing minimum power-up delay. |
Use Scenario: Reset supervision for CAN-enabled microcontrollers in door module ECUs powered by 3.3 V LDOs. IC Role / Device Role / Timing Role: Detects 3.3 V rail collapse below 2.55 V and holds MCU in reset until recovery and stabilization. Use Value: Eliminates spurious CAN frame transmission during undervoltage conditions, improving network robustness. |
| Medical Patient Monitors | Smart Energy Meters |
|
Use Scenario: Ensuring reliable boot of ARM Cortex-M4 processors in portable ECG devices with dual 2.5 V/3.3 V supplies. IC Role / Device Role / Timing Role: Provides synchronized reset to processor and analog front-end ICs using shared open-drain bus. Use Value: Guarantees atomic system startup with no race conditions between digital and analog subsystems. |
Use Scenario: Supervising 2.5 V RTC and metering ASIC supplies in Class 0.2 electricity meters operating at −25°C to +70°C. IC Role / Device Role / Timing Role: Delivers precise 2.55 V threshold detection with minimal drift over temperature and time. Use Value: Maintains metrological accuracy by preventing firmware execution on out-of-spec supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3-T | 2.93 V fixed threshold; 140 ms reset timeout; 5 µA max quiescent current; SOT-23-3 package | Higher trip point unsuitable for 2.5 V rails; better for 3.3 V systems with tighter current budgets | Select when monitoring 3.3 V supplies and ultra-low ICC (<5 µA) is critical; not drop-in for 2.55 V requirement |
| TPS3808G12DBVR | 1.22 V adjustable threshold via external resistor divider; 200 ms timeout; 1.1 µA quiescent current | Requires external components; supports custom thresholds but adds design complexity and BOM cost | Choose for flexible trip-point tuning across multiple voltage rails; avoid if fixed 2.55 V and zero-component count are mandatory |
Compared with MAX809TRD3-T and TPS3808G12DBVR, the ADM1816-20ART-RL7 delivers exact 2.55 V threshold accuracy without external components, making it optimal for cost-sensitive, space-constrained 2.5 V system supervision where guaranteed timing and minimal bill-of-materials are design priorities.
Availability
ADM1816-20ART-RL7 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply with full RoHS compliance and extended temperature support.
Supply support for ADM1816-20ART-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADM181x series was engineered specifically for reliable, low-cost power supply monitoring in microprocessor-based systems-emphasizing precision threshold accuracy, predictable reset timing, and minimal external component requirements.
FAQ
What is the exact reset threshold voltage for ADM1816-20ART-RL7?
The ADM1816-20ART-RL7 has a nominal reset threshold of 2.55 V (typical), with guaranteed minimum and maximum values of 2.47 V and 2.64 V respectively across −40°C to +105°C. This specification is validated per Table 1 in the Rev. F datasheet and applies directly to the ADM1816-20ART-RL7 variant.
Does ADM1816-20ART-RL7 require an external pull-up resistor?
No, ADM1816-20ART-RL7 integrates a 5.5 kΩ internal pull-up resistor on the RST pin, enabling direct connection to microcontroller reset inputs without external components. The datasheet confirms this feature in the "INTERNAL PULL-UP RESISTOR" section for ADM1816 devices.
Can ADM1816-20ART-RL7 be used to monitor a 3.3 V supply?
Yes, ADM1816-20ART-RL7 is explicitly rated for monitoring 3.3 V supplies, as stated in the General Description and ADM1816-specific sections. Its 2.55 V threshold provides appropriate hysteresis margin for 3.3 V rail supervision under brownout conditions.
What is the reset timeout duration of ADM1816-20ART-RL7?
The ADM1816-20ART-RL7 provides a reset active time of 150 ms (typical), with a guaranteed range of 100 ms to 250 ms across temperature and process variation. This value is specified in the "RESET ACTIVE TIME" row of Table 1 and confirmed in Figure 6 (Power-Up Reset Timeout vs. Temperature).
Is ADM1816-20ART-RL7 compatible with SOT-23 and SC70 footprints?
ADM1816-20ART-RL7 uses the SOT-23-3 (RT-3) package only, as indicated by the "ART" suffix in the part number. While functionally identical to SC70-packaged variants like ADM1816-20AKSZ-RL7, the ART version is mechanically incompatible with SC70 land patterns due to differing lead pitch and body dimensions.
ADM1816-20ART-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:
- 2.55V
- 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
ADM1816-20ART-RL7 FAQ
1.How can I place an order for ADM1816-20ART-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1816-20ART-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 ADM1816-20ART-RL7 reliable?
The price and inventory of ADM1816-20ART-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1816-20ART-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1816-20ART-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1816-20ART-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1816-20ART-RL7?
ADM1816-20ART-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1816-20ART-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 ADM1816-20ART-RL7?
For technical support, including ADM1816-20ART-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1816-20ART-RL7 requirements.
6.How does Aetrix verify that ADM1816-20ART-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1816-20ART-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 ADM1816-20ART-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1816-20ART-RL7?
All ADM1816-20ART-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1816-20ART-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 ADM1816-20ART-RL7 part is unused and in its original packaging.
Return procedure for ADM1816-20ART-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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