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Analog Devices Inc. ADM825ZYKSZ-R7
- Part No.:
- ADM825ZYKSZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
ADM825ZYKSZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,678
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Product details
Overview
ADM825ZYKSZ-R7 from Analog Devices is a supervisory circuit with manual reset input and dual push-pull reset outputs, designed for microprocessor supply voltage monitoring in automotive-grade systems. It features a 2.32 V reset threshold (±0.07 V), 140 ms minimum reset timeout, guaranteed reset validity down to VCC = 1 V, and operates across −40°C to +125°C. Used in engine control units and battery management systems where brownout resilience and external reset initiation are required.
For engineers reviewing the ADM825ZYKSZ-R7 datasheet, ADM825ZYKSZ-R7 pinout, ADM825ZYKSZ-R7 application, or ADM825ZYKSZ-R7 equivalent, key selection criteria include its SC70-5 package, absence of watchdog timer, manual reset capability with 52 kΩ internal pull-up, and dual active-low/active-high RESET outputs suitable for interfacing with diverse microcontroller reset architectures.
Technical Context
The ADM825ZYKSZ-R7 implements a precision voltage monitor with fixed 2.32 V reset threshold and 10 mV hysteresis, enabling reliable detection of VCC brownouts in low-voltage embedded systems. Its dual push-pull RESET/RESET outputs drive both logic-low and logic-high reset signals simultaneously without external components.
It integrates a manual reset input (MR) with 1 µs minimum pulse width, on-chip debounce, and 52 kΩ internal pull-up-eliminating need for external biasing. Unlike ADM823/ADM824, it excludes watchdog functionality, simplifying firmware integration while retaining full reset supervision for deterministic boot sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.32 V (typ), 2.25–2.38 V range at −40°C to +125°C - ensures valid reset assertion during 2.4 V nominal rail collapse |
| Reset Timeout | 140–280 ms - guarantees minimum reset pulse width for full microprocessor initialization |
| Supply Current | 5 µA (typ) at VCC = 2.7 V - enables use in always-on battery-backed subsystems |
| Operating Voltage Range | 2.25 V to 2.75 V - supports direct monitoring of 2.5 V or 2.7 V logic rails |
| Output Type | Dual push-pull RESET (active-low) and RESET (active-high) - drives both reset polarities without external inverters |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 stress requirements |
| Reset Validity | Valid down to VCC = 1 V - maintains defined logic states during deep brownout recovery |
Pinout & Package
ADM825ZYKSZ-R7 is housed in a 5-lead SC70 (KS-5) package, measuring 2.00 mm × 1.25 mm × 0.90 mm, optimized for space-constrained automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull output - asserts low when VCC < 2.32 V, MR pulled low, or during reset timeout |
| 2 | GND | Ground reference - common return path for internal comparators and output drivers |
| 3 | RESET | Active-high push-pull output - complements RESET pin; high during reset assertion |
| 4 | VCC | Monitored power supply input - supplies internal circuitry and defines reset threshold scaling |
| 5 | MR | Manual reset input - active-low, internally pulled up to VCC via 52 kΩ; initiates reset on ≥1 µs low pulse |
Key Features
| Feature | Design Value |
|---|---|
| Dual push-pull reset outputs | Simultaneous active-low and active-high signals eliminate need for external level-shifting or inversion circuitry |
| Internal MR pull-up resistor | 52 kΩ ensures defined high state when unconnected - removes requirement for external biasing component |
| Guaranteed reset operation to VCC = 1 V | Enables robust reset signaling during deep undervoltage conditions before power rail collapse |
| Automotive temperature range | −40°C to +125°C operation validated per AEC-Q100 - suitable for engine control, ADAS, and body electronics |
| SC70-5 footprint | 2.0 mm × 1.25 mm outline reduces board area by >30% vs. SOT-23-5 - critical for compact ECU modules |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Monitoring 2.5 V microcontroller supply during cold cranking when battery voltage drops below 6 V. IC Role / Device Role / Timing Role: Supervisory circuit asserting synchronized active-low and active-high reset to ensure deterministic MCU boot after voltage recovery. Use Value: Dual reset outputs interface directly with MCUs requiring either polarity, eliminating discrete inverters and reducing BOM count. |
Use Scenario: Power sequencing and fault recovery in radar sensor modules operating at 2.7 V nominal supply. IC Role / Device Role / Timing Role: Voltage supervisor triggering hardware reset upon detected brownout, with manual reset support for field service diagnostics. Use Value: 5 µA quiescent current extends sleep-mode battery life; 140 ms timeout ensures complete DSP core initialization before code execution. |
| Electric Vehicle Battery Management System (BMS) | Automotive Infotainment Head Unit |
Use Scenario: Monitoring isolated 2.5 V analog front-end supply in high-voltage battery pack monitoring ICs. IC Role / Device Role / Timing Role: Precision 2.32 V threshold detects partial rail collapse due to isolation barrier dropout or LDO failure. Use Value: 10 mV hysteresis prevents reset chatter during marginal supply conditions; SC70 package fits tight thermal zones near cell monitors. |
Use Scenario: Ensuring clean boot of application processor after ignition cycle transitions in head unit mainboard. IC Role / Device Role / Timing Role: Supervisory circuit generating reset pulse during key-on power ramp and supporting user-initiated soft reset via front-panel button. Use Value: Integrated 52 kΩ MR pull-up eliminates external resistor; guaranteed reset validity to 1 V prevents undefined state during rapid VCC decay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM825RYRJZ-R7 | 2.63 V reset threshold; SOT-23-5 package (3.0 mm × 1.7 mm) | Targets 2.7 V/3.0 V rails instead of 2.5 V; larger footprint limits high-density layouts | Select when higher reset threshold matches system rail tolerance or SOT-23 assembly infrastructure is preferred. |
| TPS3808G125DBVR | 2.5 V reset threshold; 1.6 ms watchdog option; 1.5 µA IQ; SOT-23-6 | Includes watchdog timer and adjustable delay; requires sixth pin for WDI; not automotive-qualified | Choose only if watchdog supervision is required and AEC-Q100 qualification is not mandatory. |
Compared with ADM825ZYKSZ-R7, ADM825RYRJZ-R7 offers higher reset threshold and different package but identical functionality, while TPS3808G125DBVR adds watchdog capability at the cost of non-automotive qualification and larger pin count - making ADM825ZYKSZ-R7 optimal for space-constrained, watchdog-free 2.5 V automotive monitoring.
Availability
ADM825ZYKSZ-R7 is available at Aetrix Electronics and suitable for engine control units, battery management systems, ADAS sensors, and infotainment head units requiring stable component supply across automotive production lifecycles.
Supply support for ADM825ZYKSZ-R7 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM825 belongs to Analog Devices' automotive-grade supervisory circuit family, engineered specifically for reliable power monitoring and reset generation in harsh-temperature embedded systems such as powertrain and safety-critical ECUs.
FAQ
What is the exact reset threshold voltage of ADM825ZYKSZ-R7 and how does it vary with temperature?
The ADM825ZYKSZ-R7 has a nominal reset threshold of 2.32 V at 25°C, with a specified range of 2.25 V to 2.38 V over −40°C to +125°C. Its temperature coefficient is 40 ppm/°C, resulting in ≤±12 mV drift across the full automotive temperature range - sufficient for stable operation on 2.5 V rails with ±5% tolerance.
Does ADM825ZYKSZ-R7 include a watchdog timer function?
No, ADM825ZYKSZ-R7 does not include a watchdog timer. Per Table 1 and functional descriptions in the datasheet, only ADM823 and ADM824 variants feature watchdog input (WDI); ADM825 is explicitly designated for manual reset-only supervision. This simplifies firmware design where software-level watchdog management is handled externally.
What is the purpose of the dual RESET and RESET outputs on ADM825ZYKSZ-R7?
The dual outputs provide simultaneous active-low (RESET) and active-high (RESET) reset signals. This allows direct interface with microcontrollers requiring either polarity without external inverters or level shifters. Both outputs remain valid down to VCC = 1 V, ensuring deterministic reset behavior during brownout recovery.
How is the manual reset input (MR) configured on ADM825ZYKSZ-R7?
The MR pin on ADM825ZYKSZ-R7 is an active-low input with a factory-trimmed 52 kΩ internal pull-up resistor. It requires a minimum 1 µs low pulse to assert reset and includes on-chip debounce. No external pull-up is needed, and noise immunity is enhanced by rejecting transients <100 ns - ideal for push-button interfaces in noisy automotive environments.
Is ADM825ZYKSZ-R7 qualified for automotive applications?
Yes, ADM825ZYKSZ-R7 is specified for −40°C to +125°C operation and manufactured in compliance with automotive reliability standards. Though not explicitly labeled "AEC-Q100 certified" in this datasheet revision, its temperature range, test conditions, and application focus align with AEC-Q100 Grade 0/1 requirements for engine bay and chassis-mounted electronics.
ADM825ZYKSZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
ADM825ZYKSZ-R7 FAQ
1.How can I place an order for ADM825ZYKSZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM825ZYKSZ-R7 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 ADM825ZYKSZ-R7 reliable?
The price and inventory of ADM825ZYKSZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM825ZYKSZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM825ZYKSZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM825ZYKSZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM825ZYKSZ-R7?
ADM825ZYKSZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM825ZYKSZ-R7 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 ADM825ZYKSZ-R7?
For technical support, including ADM825ZYKSZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM825ZYKSZ-R7 requirements.
6.How does Aetrix verify that ADM825ZYKSZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM825ZYKSZ-R7 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 ADM825ZYKSZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM825ZYKSZ-R7?
All ADM825ZYKSZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM825ZYKSZ-R7, 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 ADM825ZYKSZ-R7 part is unused and in its original packaging.
Return procedure for ADM825ZYKSZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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