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Analog Devices Inc. ADM1816-20AKSZ-RL7
- Part No.:
- ADM1816-20AKSZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1816-20AKSZ-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,987
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Product details
Overview
ADM1816-20AKSZ-RL7 from Analog Devices is a precision 3-pin open-drain microprocessor reset circuit with internal pull-up resistor, designed for monitoring 2.5 V power supplies. It features a 2.55 V (typical) reset threshold, 150 ms reset timeout, −40°C to +105°C operating range, and SC70 package. Used in embedded controllers to ensure safe system initialization after power-on.
For engineers reviewing the ADM1816-20AKSZ-RL7 datasheet, ADM1816-20AKSZ-RL7 pinout, ADM1816-20AKSZ-RL7 application, or ADM1816-20AKSZ-RL7 equivalent, key selection criteria include trip point accuracy, reset delay stability over temperature, open-drain output compatibility with I²C-bus logic levels, and SC70 footprint constraints in space-constrained industrial control modules.
Technical Context
The ADM1816-20AKSZ-RL7 implements a bandgap-based voltage reference with comparator hysteresis and a fixed 150 ms power-up reset timer. Its internal 5.5 kΩ pull-up resistor enables direct interface to microcontroller reset inputs without external components.
This variant belongs to the ADM1815–ADM1818 family optimized for low-voltage supply monitoring (2.18 V to 3.15 V), using open-drain active-low output architecture compatible with mixed-voltage systems requiring level-shifted reset signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.55 V typical (2.47–2.64 V min/max); ensures reliable detection of 2.5 V rail collapse before brownout. |
| Reset Timeout | 150 ms typical (100–250 ms); guarantees stable power supply settling before releasing microprocessor reset. |
| Supply Range | 1.2 V to 5.5 V; supports operation across wide input voltages while monitoring only 2.5 V rail. |
| Quiescent Current | 4 µA at 3.6 V; enables ultra-low-power operation in battery-backed or always-on embedded systems. |
| Output Type | Active-low open-drain with 5.5 kΩ internal pull-up; simplifies interface to diverse MCU reset pins and enables wired-OR reset bus sharing. |
| Operating Temp | −40°C to +105°C; qualified for industrial and automotive under-hood applications requiring extended thermal robustness. |
| Package | SC70-3 (KS-3); 2.0 mm × 1.25 mm footprint ideal for compact PCB layouts in portable instrumentation. |
Pinout & Package
ADM1816-20AKSZ-RL7 is housed in a 3-lead SC70 (KS-3) package with 0.65 mm lead pitch and coplanarity ≤0.10 mm. Pin 1 = VCC, Pin 2 = GND, Pin 3 = RST (active-low open-drain output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply Input | Monitored power rail input; device operates and asserts reset when VCC falls below 2.55 V threshold. |
| GND | Ground Reference | 0 V reference for internal comparator and output stage; must be connected to system ground plane. |
| RST | Reset Output | Active-low open-drain signal; pulled low during reset condition and floats high (via internal 5.5 kΩ) otherwise. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Pull-Up Resistor | 5.5 kΩ typical (3.5–7.5 kΩ); eliminates need for external pull-up, reducing BOM count and layout area. |
| Reset Delay Accuracy | ±33% over temperature (100–250 ms); provides deterministic timing margin for power supply stabilization. |
| Threshold Temperature Drift | ±0.03%/°C typical; maintains trip point stability across full −40°C to +105°C operating range. |
| Low Supply Current | 4 µA at 3.6 V; extends battery life in remote sensors and energy-harvesting nodes. |
| ESD Robustness | ±2 kV HBM; protects against handling damage during assembly and field service. |
Applications
| Industrial PLC Controller | Medical Diagnostic Sensor Node |
|---|---|
Use Scenario: Power cycling during firmware updates in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Monitors 2.5 V FPGA configuration rail and holds ARM Cortex-M4 in reset until rail stabilizes post-power-up. Use Value: Prevents partial configuration loading that could cause logic lockup or corrupted I/O states. |
Use Scenario: Battery-powered portable ultrasound probe with cold-start requirement after deep sleep. IC Role / Device Role / Timing Role: Detects 2.5 V analog front-end supply recovery and initiates ADC calibration sequence via reset pulse. Use Value: Ensures analog signal chain powers up in known state, eliminating baseline drift on first acquisition. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: 12 V vehicle battery drop during cranking causing transient 2.5 V rail sag in infotainment sub-system. IC Role / Device Role / Timing Role: Generates clean reset pulse when 2.5 V rail recovers above 2.55 V, synchronizing MCU restart with stable power. Use Value: Avoids spurious reboots during engine start, maintaining CAN bus session continuity. |
Use Scenario: Mains-powered meter with supercapacitor backup sustaining real-time clock during outages. IC Role / Device Role / Timing Role: Monitors 2.5 V RTC supply and triggers controlled shutdown/reset when capacitor voltage decays below threshold. Use Value: Guarantees timekeeping integrity and prevents EEPROM write corruption during brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326-L25-T | 2.5 V fixed threshold, 140 ms reset timeout, SOT-23-3 package, no internal pull-up. | Requires external 10 kΩ pull-up; less suitable for SC70-limited layouts but offers tighter timeout tolerance (±10%). | Select when tighter reset timing control is prioritized over board area and BOM simplicity. |
| TPS3808G125DBVR | 2.5 V threshold, adjustable reset delay (0.5–10 s), SOT-23-6, push-pull output, no internal pull-up. | Needs external RC network for delay tuning; larger footprint and higher quiescent current (12 µA). | Choose when programmable delay or push-pull drive strength is required for legacy MCU interfaces. |
Compared with MAX6326-L25-T and TPS3808G125DBVR, the ADM1816-20AKSZ-RL7 delivers optimal integration for space-constrained 2.5 V systems-combining SC70 size, internal pull-up, and guaranteed 150 ms reset hold time without external components-making it ideal for high-volume industrial edge nodes where layout efficiency and supply-chain simplicity are critical.
Availability
ADM1816-20AKSZ-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic sensor nodes, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM1816-20AKSZ-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 developed specifically for cost-sensitive, space-constrained microprocessor reset applications in industrial, automotive, and medical electronics-emphasizing precision threshold accuracy, guaranteed reset timing, and minimal external component count.
FAQ
What is the exact reset threshold voltage for ADM1816-20AKSZ-RL7?
The ADM1816-20AKSZ-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 is specified in Table 1 of the Rev. F datasheet under "VCC TRIP POINT" for the -20 variant, confirming its suitability for monitoring 2.5 V supply rails with appropriate margin.
Does ADM1816-20AKSZ-RL7 require an external pull-up resistor?
No, ADM1816-20AKSZ-RL7 includes an internal pull-up resistor of 5.5 kΩ (typical, 3.5–7.5 kΩ range) on the RST pin. This eliminates the need for an external component, simplifying design and reducing PCB area-confirmed in Table 1 under "INTERNAL PULL-UP RESISTOR" and functional block diagram Figure 1.
What package type and dimensions does ADM1816-20AKSZ-RL7 use?
ADM1816-20AKSZ-RL7 uses the SC70-3 (KS-3) package: 2.00 mm × 1.25 mm body size, 0.65 mm lead pitch, and total height ≤0.9 mm. Dimensions are fully specified in Figure 16 (Page 8) of the Rev. F datasheet, and the "Z" suffix confirms RoHS compliance.
Can ADM1816-20AKSZ-RL7 be used with a manual reset button?
No-only ADM1813 and ADM1818 variants support push-button reset functionality. The ADM1816-20AKSZ-RL7 lacks the internal circuitry for button debounce and timed reset assertion; this is explicitly stated in the "ADM1813 AND ADM1818" section (Page 7) and absent from ADM1816 descriptions.
What is the operating temperature range for ADM1816-20AKSZ-RL7?
The ADM1816-20AKSZ-RL7 is rated for −40°C to +105°C operation, as confirmed in the Ordering Guide (Page 9) and Absolute Maximum Ratings table (Page 4). This industrial-grade temperature range supports deployment in harsh environments such as factory automation controllers and automotive under-hood modules.
ADM1816-20AKSZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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:
- SC-70-3
ADM1816-20AKSZ-RL7 FAQ
1.How can I place an order for ADM1816-20AKSZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1816-20AKSZ-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 ADM1816-20AKSZ-RL7 reliable?
The price and inventory of ADM1816-20AKSZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1816-20AKSZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1816-20AKSZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1816-20AKSZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1816-20AKSZ-RL7?
ADM1816-20AKSZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1816-20AKSZ-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 ADM1816-20AKSZ-RL7?
For technical support, including ADM1816-20AKSZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1816-20AKSZ-RL7 requirements.
6.How does Aetrix verify that ADM1816-20AKSZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1816-20AKSZ-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 ADM1816-20AKSZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1816-20AKSZ-RL7?
All ADM1816-20AKSZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1816-20AKSZ-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 ADM1816-20AKSZ-RL7 part is unused and in its original packaging.
Return procedure for ADM1816-20AKSZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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