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Analog Devices Inc. ADM1815-5AKS-RL7
- Part No.:
- ADM1815-5AKS-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM1815-5AKS-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,079
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Product details
Overview
ADM1815-5AKS-RL7 from Analog Devices is a precision active-low microprocessor reset circuit in SC70-3 package, monitoring 3.06 V (typ) supply voltage with 150 ms reset timeout, ±1.5% trip accuracy over −40°C to +105°C, and 9–16 µA quiescent current - used for safe power-up initialization in embedded controllers and industrial microprocessor systems.
For engineers reviewing the ADM1815-5AKS-RL7 datasheet, ADM1815-5AKS-RL7 pinout, ADM1815-5AKS-RL7 application, or ADM1815-5AKS-RL7 equivalent, key selection criteria include its active-low push-pull output, 3.06 V threshold for 3.3 V rail supervision, SC70-3 footprint compatibility, and guaranteed reset assertion during brownout conditions.
Technical Context
The ADM1815-5AKS-RL7 implements a precision bandgap-based voltage reference with comparator and 150 ms internal timer to ensure reliable reset assertion during power-up and power-down transients. Its active-low push-pull output drives directly into most µP reset inputs without external pull-up.
It operates across full industrial temperature range (−40°C to +105°C) with supply voltage range of 1.2 V to 5.5 V and features low 9 µA typical supply current at 3.6 V, enabling use in battery-backed and low-power embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.06 V typical (min 2.98 V, max 3.15 V) - precisely monitors 3.3 V supplies with margin for ripple and tolerance. |
| Reset Timeout | 150 ms typical (100–250 ms) - ensures stable power supply before releasing reset to prevent premature MCU boot. |
| Supply Voltage Range | 1.2 V to 5.5 V - supports operation from low-voltage logic rails up to 5 V systems. |
| Quiescent Current | 9 µA typical at 5.5 V, 4 µA typical at 3.6 V - enables long-term operation in always-on supervisory applications. |
| Output Type | Active-low push-pull - provides direct interface to µP reset pins without external components. |
| Operating Temperature | −40°C to +105°C - qualified for industrial and automotive under-hood environments. |
| Package | SC70-3 (KS-3), 2.0 mm × 2.1 mm - space-constrained PCBs requiring high-density layout. |
Pinout & Package
ADM1815-5AKS-RL7 is housed in a 3-lead SC70 (KS-3) package with 0.65 mm lead pitch, compliant with EIAJ SC70 standards and rated for θJA = 146°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RST) | Active-low reset output | Drives low during undervoltage condition and remains low for 150 ms after VCC rises above threshold - directly asserts µP reset input. |
| 2 (VCC) | Supply voltage input | Monitored rail; device draws supply current from this pin and compares it against internal reference. |
| 3 (GND) | Ground reference | 0 V return path for all internal circuitry and output stage - must be low-impedance connection for accurate threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage monitoring | ±1.5% trip accuracy over full temperature range ensures robust reset behavior across environmental extremes. |
| Guaranteed power-on reset | 150 ms minimum timeout prevents spurious release during supply ramp-up - eliminates need for external RC timing. |
| Low-power operation | Sub-10 µA supply current at 3.6 V enables integration into energy-sensitive IoT edge nodes and backup circuits. |
| Direct µP interface | Active-low push-pull output eliminates external pull-up resistor - reduces BOM count and board area. |
| Small-footprint packaging | SC70-3 (2.0 × 2.1 mm) supports high-density designs where SOT-23 is too large or thermal performance is critical. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Power sequencing in modular I/O backplanes where 3.3 V logic rails must stabilize before FPGA configuration begins. IC Role / Device Role / Timing Role: Supervises 3.3 V supply and asserts active-low reset to FPGA and ARM Cortex-M7 until voltage exceeds 3.06 V and holds for 150 ms. Use Value: Prevents configuration corruption by guaranteeing clean power-up sequence without external timing components. |
Use Scenario: Battery-backed patient monitor with dual-supply architecture (main 3.3 V + backup coin cell). IC Role / Device Role / Timing Role: Monitors main 3.3 V rail and triggers controlled shutdown/reset when voltage drops below 3.06 V during AC failure. Use Value: Ensures deterministic state recovery and data integrity preservation during switchover to backup power. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Cold-cranking event in 12 V vehicle electrical system where 3.3 V LDO output dips transiently during engine start. IC Role / Device Role / Timing Role: Detects 3.3 V brownout and holds microcontroller in reset until rail recovers and stabilizes for 150 ms. Use Value: Avoids erratic CAN communication or EEPROM writes during unstable supply conditions. |
Use Scenario: Tamper-resistant meter with real-time clock and flash memory requiring guaranteed reset on power interruption. IC Role / Device Role / Timing Role: Supervises 3.3 V supply feeding RTC and secure bootloader; asserts reset if voltage falls below 3.06 V. Use Value: Maintains cryptographic key integrity and prevents partial firmware updates during grid fluctuations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 3.08 V threshold (±2.5%), SOT-23-3 package, 1.2–6.0 V supply range, 14 µA typical ICC | Higher threshold tolerance and larger SOT-23 footprint - less suitable for tight SC70 layouts | Select when SOT-23 is preferred and ±2.5% trip accuracy is acceptable for 3.3 V rail margin. |
| TPS3808G30DBVR | 3.0 V threshold (±0.5%), SOT-23-6 package, 0.8–6.0 V supply, 2.8 µA typical ICC, programmable delay | Lower quiescent current and tighter threshold accuracy but requires external capacitor for delay setting | Select when ultra-low power (<3 µA) and sub-1% threshold precision are required, and board space allows SOT-23-6. |
Compared with MAX809SEUR+T and TPS3808G30DBVR, the ADM1815-5AKS-RL7 offers optimal balance of SC70 size, ±1.5% trip accuracy, and integrated 150 ms timeout - eliminating external timing components while fitting dense industrial PCBs.
Availability
ADM1815-5AKS-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.
Supply support for ADM1815-5AKS-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 designed specifically for reliable, low-cost power supply monitoring in microprocessor-based systems - emphasizing precision threshold accuracy, guaranteed reset timing, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the ADM1815-5AKS-RL7?
The ADM1815-5AKS-RL7 has a nominal reset threshold of 3.06 V, with guaranteed minimum of 2.98 V and maximum of 3.15 V across −40°C to +105°C. This value is specified in Table 1 of the Rev. F datasheet and applies specifically to the -5 variant, confirming its suitability for supervising standard 3.3 V power rails with adequate noise margin.
Does the ADM1815-5AKS-RL7 require an external pull-up resistor on the RST pin?
No, the ADM1815-5AKS-RL7 does not require an external pull-up resistor because it features an active-low push-pull output stage. The RST pin actively drives low during reset and high when released - enabling direct connection to microprocessor reset inputs without additional components, unlike open-drain alternatives such as ADM1816-5AKSZ-RL7.
Is the ADM1815-5AKS-RL7 compatible with both 3.3 V and 5 V systems?
Yes, the ADM1815-5AKS-RL7 operates from 1.2 V to 5.5 V supply voltage and monitors a fixed 3.06 V threshold - making it fully compatible with 3.3 V systems (where it provides appropriate margin) and usable in 5 V systems as long as the monitored rail is 3.3 V. It is not intended to monitor 5 V rails directly; for that, ADM1810-5AKS-RL7 (4.62 V threshold) is specified.
What is the reset timeout duration of the ADM1815-5AKS-RL7, and is it adjustable?
The ADM1815-5AKS-RL7 provides a fixed 150 ms typical reset timeout (100–250 ms min/max), which is internally generated and non-adjustable. This timeout begins when VCC rises above the threshold and ensures the power supply has stabilized before releasing the reset signal - eliminating the need for external RC networks or configuration pins.
Which package type does the ADM1815-5AKS-RL7 use, and what are its key mechanical dimensions?
The ADM1815-5AKS-RL7 uses the SC70-3 (KS-3) package: 2.0 mm × 2.1 mm body size, 0.65 mm lead pitch, and 0.95 mm maximum height. Its outline complies with EIAJ SC70 standards (Figure 16, Page 8 of Rev. F datasheet), offering higher thermal efficiency (θJA = 146°C/W) than comparable SOT-23 variants.
ADM1815-5AKS-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:
- 3.06V
- 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:
- SC-70-3
ADM1815-5AKS-RL7 FAQ
1.How can I place an order for ADM1815-5AKS-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM1815-5AKS-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 ADM1815-5AKS-RL7 reliable?
The price and inventory of ADM1815-5AKS-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM1815-5AKS-RL7 is usually 5 days.
3.What payment methods are accepted for ADM1815-5AKS-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM1815-5AKS-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM1815-5AKS-RL7?
ADM1815-5AKS-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM1815-5AKS-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 ADM1815-5AKS-RL7?
For technical support, including ADM1815-5AKS-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM1815-5AKS-RL7 requirements.
6.How does Aetrix verify that ADM1815-5AKS-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM1815-5AKS-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 ADM1815-5AKS-RL7 meets industry standards.
7.What is the process for return or replacement of ADM1815-5AKS-RL7?
All ADM1815-5AKS-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM1815-5AKS-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 ADM1815-5AKS-RL7 part is unused and in its original packaging.
Return procedure for ADM1815-5AKS-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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