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Analog Devices Inc. ADM1815-20ART-RL7
- Part No.:
- ADM1815-20ART-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM1815-20ART-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,212
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Product details
Overview
ADM1815-20ART-RL7 from Analog Devices is an active-low, push-pull microprocessor reset circuit designed to monitor 2.5 V supply rails. It features a 2.55 V (typical) reset threshold, 150 ms reset timeout, 9–16 µA supply current, and operates across −40°C to +105°C. It ensures safe system initialization in embedded controllers and industrial microprocessor systems.
For engineers reviewing the ADM1815-20ART-RL7 datasheet, ADM1815-20ART-RL7 pinout, ADM1815-20ART-RL7 application, or ADM1815-20ART-RL7 equivalent, key selection criteria include trip point accuracy (±2.5% over temperature), SOT-23 package compatibility, push-pull output drive capability (350 µA source / 8 mA sink), and guaranteed reset assertion during power-up/power-down transitions.
Technical Context
The ADM1815-20ART-RL7 integrates a precision voltage reference, comparator with hysteresis, and a 150 ms monostable delay circuit to generate a clean, glitch-free reset signal. Its internal architecture guarantees reset assertion while VCC remains below 2.55 V (typ), and holds reset active for ≥100 ms after VCC rises above threshold.
This device belongs to the ADM181x family of single-supply voltage monitors with fixed thresholds and no external component requirements. Unlike open-drain variants (e.g., ADM1816/1818), it uses a push-pull output stage compatible with direct connection to most µP reset inputs without pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55 V typical (2.47–2.64 V min/max); precisely targets 2.5 V supply monitoring with ±2.5% tolerance over full temperature range. |
| Reset Timeout | 150 ms typical (100–250 ms); provides sufficient stabilization window before releasing reset to prevent premature CPU boot. |
| Supply Current | 9–16 µA at 5.5 V; ultra-low quiescent draw enables use in battery-backed or always-on monitoring applications. |
| Output Type | Active-low push-pull; delivers 350 µA source / 8 mA sink current - eliminates need for external pull-up and supports direct µP interface. |
| Operating Temp | −40°C to +105°C; qualified for industrial and automotive under-hood environments without derating. |
| VCC Range | 1.2–5.5 V; supports operation even when monitored rail is unpowered, enabling robust brownout detection. |
Pinout & Package
ADM1815-20ART-RL7 is housed 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 reset output | Drives low while VCC < 2.55 V (typ) and remains low for ≥100 ms after VCC exceeds threshold; push-pull stage interfaces directly with µP reset pin. |
| VCC | Supply input / monitored rail | Both powers the IC and serves as the voltage being monitored; valid down to 1.2 V, enabling detection of deep brownout conditions. |
| GND | Ground reference | 0 V return for internal reference and output stage; must be connected to system ground plane for accurate threshold tracking. |
Key Features
| Feature | Design Value |
|---|---|
| Precision fixed threshold | 2.55 V typical with ±2.5% max deviation over −40°C to +105°C - eliminates calibration overhead in 2.5 V system designs. |
| Guaranteed reset timing | 150 ms nominal timeout with 100–250 ms min/max spec - ensures deterministic release after power stabilization, preventing race conditions. |
| Push-pull output | No external pull-up required; 8 mA sink strength drives heavy capacitive loads (e.g., long PCB traces or multiple µP inputs) without signal degradation. |
| Low-power operation | 9 µA min supply current at 3.6 V - extends battery life in portable or energy-harvesting applications requiring continuous supervision. |
| Industrial temperature grade | Qualified from −40°C to +105°C - supports deployment in motor drives, PLCs, and outdoor IoT gateways without thermal margin concerns. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Power sequencing in modular I/O backplanes where 2.5 V FPGA configuration rails must stabilize before logic initialization. IC Role / Device Role / Timing Role: Monitors 2.5 V supply and asserts active-low reset to FPGA and ARM Cortex-M7 until voltage settles within spec for ≥150 ms. Use Value: Prevents configuration corruption by guaranteeing FPGA bitstream load only after stable 2.5 V rail, eliminating field failures due to marginal power-up timing. |
Use Scenario: Supervising 2.5 V analog front-end (AFE) supplies in portable ultrasound units with battery backup. IC Role / Device Role / Timing Role: Generates hardware reset pulse on AFE power-up and brownout, synchronized to main SoC reset via shared RST net. Use Value: Ensures AFE ADCs and amplifiers initialize cleanly after battery switchover, avoiding offset drift or gain error during critical acquisition windows. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Monitoring 2.5 V CAN transceiver bias rail in harsh under-dash environment subject to load dump and cold cranking. IC Role / Device Role / Timing Role: Detects undervoltage on 2.5 V rail and holds microcontroller in reset until rail recovers and remains stable for 150 ms. Use Value: Eliminates CAN bus lockup or spurious frame transmission during transient supply dips, improving network reliability per ISO 11898-2. |
Use Scenario: Supervising 2.5 V metrology ADC reference supply in Class 0.2 electricity meters operating 24/7 at elevated ambient temperatures. IC Role / Device Role / Timing Role: Provides fail-safe reset if 2.5 V reference sags below 2.47 V, triggering meter re-initialization before measurement error exceeds accuracy class limits. Use Value: Maintains metrological integrity by forcing recalibration of ADC reference path upon detected supply anomaly, satisfying IEC 62053-22 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM1815-20ARTZ-RL7 | RoHS-compliant (lead-free) variant with identical electrical specs and SOT-23 package. | Required for new designs targeting WEEE/ROHS compliance; same footprint and performance. | Select when lead-free assembly or environmental certification is mandatory. |
| MAX6326-L25-T | 2.5 V reset threshold, 140 ms timeout, 3 µA supply current, SC70 package; push-pull active-low output. | Lower quiescent current but smaller SC70 footprint; requires layout revision if replacing SOT-23. | Choose for ultra-low-power or space-constrained designs where SC70 is acceptable and 10 ms shorter timeout is tolerable. |
Compared with ADM1815-20ARTZ-RL7, the ADM1815-20ART-RL7 offers identical functionality without RoHS compliance - suitable for legacy manufacturing. Against MAX6326-L25-T, it trades 6 µA higher supply current for proven SOT-23 mechanical robustness and 10 ms longer reset hold time, easing timing margin in noisy industrial environments.
Availability
ADM1815-20ART-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, and automotive body control modules requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for ADM1815-20ART-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, 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 reliable, low-cost power supply monitoring in microprocessor-based systems - emphasizing precision threshold stability, guaranteed timing, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the ADM1815-20ART-RL7?
The ADM1815-20ART-RL7 has a nominal reset threshold of 2.55 V, with a guaranteed range of 2.47 V (min) to 2.64 V (max) across −40°C to +105°C. This value is factory-trimmed and specified in Table 1 of the Rev. F datasheet under "VCC TRIP POINT" for the -20 variant.
Does the ADM1815-20ART-RL7 require an external pull-up resistor on the RST pin?
No. The ADM1815-20ART-RL7 features an active-low push-pull output stage, so the RST pin drives both high and low actively. Unlike open-drain variants (e.g., ADM1816), it requires no external pull-up resistor and connects directly to standard microprocessor reset inputs.
Can the ADM1815-20ART-RL7 monitor voltages other than 2.5 V?
No - the ADM1815-20ART-RL7 is a fixed-threshold device optimized for 2.5 V supply monitoring. Its 2.55 V (typ) trip point is not adjustable. For other rails, select variants like ADM1815-10 (2.88 V) or ADM1815-5 (3.06 V), all in the same SOT-23 package.
What is the maximum supply voltage the ADM1815-20ART-RL7 can withstand on VCC?
The ADM1815-20ART-RL7 supports VCC up to 5.5 V per Absolute Maximum Ratings (Table 2). It remains functional and continues monitoring even when the monitored rail exceeds 2.5 V - for example, during 5 V system power-up sequences where the 2.5 V rail lags.
Is the ADM1815-20ART-RL7 pin-compatible with other ADM181x SOT-23 variants?
Yes - all ADM181x devices in RT-3 (SOT-23) packaging share identical 3-pin pinout (RST, VCC, GND) and footprint. The ADM1815-20ART-RL7 can be substituted with other -ART variants (e.g., ADM1815-10ART-RL7) without PCB changes, provided the trip point matches system requirements.
ADM1815-20ART-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:
- Push-Pull, Totem Pole
- 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
ADM1815-20ART-RL7 FAQ
1.How can I place an order for ADM1815-20ART-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1815-20ART-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 ADM1815-20ART-RL7 reliable?
The price and inventory of ADM1815-20ART-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1815-20ART-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1815-20ART-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1815-20ART-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1815-20ART-RL7?
ADM1815-20ART-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1815-20ART-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 ADM1815-20ART-RL7?
For technical support, including ADM1815-20ART-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1815-20ART-RL7 requirements.
6.How does Aetrix verify that ADM1815-20ART-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1815-20ART-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 ADM1815-20ART-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1815-20ART-RL7?
All ADM1815-20ART-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1815-20ART-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 ADM1815-20ART-RL7 part is unused and in its original packaging.
Return procedure for ADM1815-20ART-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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