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Analog Devices Inc. ADM2914-1SRQZEP
- Part No.:
- ADM2914-1SRQZEP
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADM2914-1SRQZEP.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,095
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Product details
Overview
ADM2914-1SRQZEP from Analog Devices is a quad UV/OV voltage supervisor IC designed for multi-rail power monitoring in harsh environments. It monitors up to four rails-two positive and two negative-with ±1.5% threshold accuracy over −55°C to +125°C, 1 V buffered reference output, and open-drain UV/OV reset outputs. Used in FPGA/DSP core-I/O monitoring and telecom equipment.
For engineers reviewing the ADM2914-1SRQZEP datasheet, ADM2914-1SRQZEP pinout, ADM2914-1SRQZEP application, or ADM2914-1SRQZEP equivalent, key selection considerations include adjustable UV/OV thresholds, latching OV output with LATCH pin control, SEL-configurable polarity for rails 3–4, timer-programmable reset timeout, and operation down to 1 V VCC.
Technical Context
The ADM2914-1SRQZEP implements independent comparator pairs per rail (VHx/VLx), each comparing against a 500 mV internal threshold with ±1.5% accuracy across temperature. Its three-state SEL pin selects polarity (positive/negative/undefined) for VH3/VL3/VH4/VL4, enabling flexible negative-rail supervision using the 1 V REF as offset.
A built-in 6.6 V shunt regulator allows direct connection to supply rails up to 16 V when used with a current-limiting dropper resistor. The latching OV output is cleared only by toggling the LATCH pin, while UV output features an externally capacitor-programmed timeout (6–14 ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 6 V direct supply; >6 V requires dropper resistor due to 6.6 V internal shunt regulator |
| UV/OV Threshold | 500 mV ±1.5% over −55°C to +125°C - enables precise rail margining without external resistive dividers |
| REF Output | 1.000 V ±15 mV, ±1 mA drive - provides stable offset for negative-voltage monitoring circuits |
| Supply Current | 62 μA typical at 25°C - supports ultra-low-power system-level supervision |
| Reset Timeout | 6–14 ms, set by external TIMER capacitor (1 nF = 8.5 ms typ) - configurable delay avoids false resets during power transients |
| Operating Temp | −55°C to +125°C - qualified for extended industrial, aerospace, and defense applications |
| Output Type | Open-drain UV and OV with weak internal pull-up to VCC - supports wired-OR reset buses and 16 V external pull-up |
Pinout & Package
ADM2914-1SRQZEP is housed in a 16-lead QSOP (RQ-16) package, JEDEC MO-137-AB compliant, with 0.635 mm pitch and 4.90 mm × 3.91 mm body size.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VH1, VH2 | Positive-rail high-threshold input | Detects undervoltage on rails 1–2 when voltage drops below 500 mV; connect to VCC if unused |
| VL1, VL2 | Positive-rail low-threshold input | Detects overvoltage on rails 1–2 when voltage rises above 500 mV; tie to GND if unused |
| VH3, VH4, VL3, VL4 | SEL-configurable rail inputs | Polarity (positive/negative) determined by SEL state; enable dual-mode monitoring of rails 3–4 |
| REF | Buffered 1 V reference output | Provides stable offset for negative-supply monitoring; drives ≤1 nF load |
| UV, OV | Open-drain reset outputs | UV asserts low on undervoltage with programmable timeout; OV asserts low on overvoltage and can be latched |
| LATCH | OV latch control | Pull high to clear latched OV; pull low to enable latching behavior |
| SEL | Input polarity select | Three-state pin (VCC/GND/open) configures VH3/VL3/VH4/VL4 for positive, negative, or undefined mode |
| TIMER | Reset timeout capacitor node | Connect external capacitor (e.g., 1 nF) to set UV timeout; tie to VCC to bypass |
| VCC, GND | Power supply and ground | VCC accepts 2.3–6 V directly; >6 V requires series resistor to limit current to <10 mA |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent UV/OV supervision | Four fully independent rail monitors, each with dedicated VHx/VLx inputs and shared UV/OV outputs |
| Adjustable polarity for rails 3–4 | SEL pin configures VH3/VL3/VH4/VL4 for positive, negative, or undefined monitoring - eliminates need for external level shifters |
| Latching overvoltage detection | OV output remains asserted until LATCH pin is toggled - ensures persistent fault signaling in safety-critical systems |
| 1 V buffered reference | Stable, low-drift REF output enables accurate negative-rail monitoring without external references or op amps |
| Glitch-immune comparator design | Immunity to sub-μs transients ensures reliable reset assertion in noisy power environments |
Applications
| Server Supply Monitoring | FPGA/DSP Core & I/O Voltage Monitoring |
|---|---|
Use Scenario: Real-time tracking of multiple DC/DC converter outputs in rack-mounted servers. IC Role / Device Role / Timing Role: Quad supervisor monitors CPU core, memory, PCIe, and auxiliary rails simultaneously for UV/OV faults. Use Value: Enables early fault detection before system lockup; latched OV prevents missed alerts during transient recovery. | Use Scenario: Ensuring safe power sequencing and brownout protection for heterogeneous FPGA platforms with mixed 1.0 V, 1.8 V, and 3.3 V domains. IC Role / Device Role / Timing Role: Monitors core (VCCINT), auxiliary (VCCAUX), and I/O (VCCO) supplies with rail-specific thresholds and timeouts. Use Value: 1 V REF and SEL-configurable inputs support direct negative-bias monitoring for analog I/O banks. |
| Telecommunications Equipment | Medical Equipment |
Use Scenario: Supervision of distributed power modules in base station RF front-ends and optical line cards. IC Role / Device Role / Timing Role: Tracks +12 V bias, −5 V analog, +3.3 V control, and −12 V interface rails under wide temperature swings. Use Value: −55°C to +125°C rating and ±1.5% threshold accuracy ensure reliability in uncontrolled outdoor enclosures. | Use Scenario: Power integrity assurance in MRI gradient amplifiers and patient-monitoring subsystems requiring fail-safe shutdown. IC Role / Device Role / Timing Role: Monitors isolated ±15 V analog supplies and digital 5 V/3.3 V rails with independent UV/OV flags and latched fault reporting. Use Value: Open-drain outputs allow OR-ing into centralized safety interlock chains; glitch immunity prevents spurious resets during EMI events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM2914-1SRQZ | Same die, commercial temperature range (−40°C to +85°C); identical pinout, specs, and functionality | Not rated for extended temp operation; unsuitable for aerospace or under-hood automotive use | Select ADM2914-1SRQZEP when operating beyond 85°C or requiring MIL-STD-883 screening compliance |
| MAX6814BSA+ | Quad UV monitor only (no OV detection); fixed 1.25 V reference; no SEL polarity control or latching OV | Lacks negative-rail support and overvoltage response; limited to simpler single-polarity systems | Choose MAX6814BSA+ only if OV supervision is unnecessary and cost is prioritized over feature depth |
Compared with ADM2914-1SRQZ and MAX6814BSA+, the ADM2914-1SRQZEP uniquely combines quad UV/OV supervision, −55°C to +125°C operation, SEL-configurable polarity, and latched OV output - making it the only option qualified for high-reliability negative-rail monitoring in extreme environments.
Availability
ADM2914-1SRQZEP is available at Aetrix Electronics and suitable for server supply monitoring, FPGA/DSP core and I/O voltage monitoring, and telecommunications equipment requiring stable component supply across extended temperature ranges.
Supply support for ADM2914-1SRQZEP 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.
The ADM2914 product line delivers radiation-hardened and extended-temperature voltage supervisors for mission-critical power monitoring in aerospace, defense, and medical systems where reliability under thermal stress is non-negotiable.
FAQ
What is the operating temperature range of the ADM2914-1SRQZEP?
The ADM2914-1SRQZEP operates from −55°C to +125°C, meeting extended industrial and military-grade requirements. This range is validated per the device's enhanced product (EP) qualification, including burn-in, temperature cycling, and long-term reliability testing. All electrical specifications-including threshold accuracy, supply current, and reference voltage-are guaranteed across this full range, unlike commercial variants such as the ADM2914-1SRQZ.
How does the SEL pin configure polarity for rails 3 and 4 on the ADM2914-1SRQZEP?
The SEL pin on the ADM2914-1SRQZEP is a three-state input that determines whether VH3/VL3/VH4/VL4 monitor positive or negative supplies. When tied to VCC, inputs are configured for positive-rail UV/OV detection; when tied to GND, they detect negative-rail conditions using the 1 V REF as offset; when left open, behavior is undefined per datasheet. This eliminates external level-shifting circuitry for bipolar monitoring.
Can the ADM2914-1SRQZEP monitor voltages higher than 6 V?
Yes - the ADM2914-1SRQZEP supports input monitoring up to 16 V on UV/OV pins and uses an internal 6.6 V shunt regulator on VCC. To connect to >6 V supplies, a dropper resistor must be placed between the source and VCC to limit current to ≤10 mA. The shunt regulator clamps VCC, enabling safe operation without external regulators or LDOs.
What is the function of the LATCH pin on the ADM2914-1SRQZEP?
The LATCH pin on the ADM2914-1SRQZEP controls the overvoltage output behavior: pulling LATCH high clears a latched OV condition, while pulling it low enables latching so OV remains asserted until manually reset. This differs from the UV output, which always times out. The latching feature ensures persistent fault signaling in safety-critical applications where transient OV events must trigger irreversible shutdown sequences.
How is the reset timeout period set for the UV output of the ADM2914-1SRQZEP?
The UV reset timeout on the ADM2914-1SRQZEP is set by an external capacitor connected to the TIMER pin. A 1 nF capacitor yields 8.5 ms typical timeout (6–14 ms over temperature). Larger capacitors increase delay linearly per Figure 14 in the datasheet. Connecting TIMER directly to VCC disables the timeout, causing immediate UV deassertion after threshold recovery.
ADM2914-1SRQZEP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 6ms Minimum
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
ADM2914-1SRQZEP FAQ
1.How can I place an order for ADM2914-1SRQZEP through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM2914-1SRQZEP 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 ADM2914-1SRQZEP reliable?
The price and inventory of ADM2914-1SRQZEP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM2914-1SRQZEP is usually 5 days.
3.What payment methods are accepted for ADM2914-1SRQZEP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM2914-1SRQZEP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM2914-1SRQZEP?
ADM2914-1SRQZEP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM2914-1SRQZEP 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 ADM2914-1SRQZEP?
For technical support, including ADM2914-1SRQZEP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM2914-1SRQZEP requirements.
6.How does Aetrix verify that ADM2914-1SRQZEP is sourced from the original manufacturer or authorized distributors?
All ADM2914-1SRQZEP 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 ADM2914-1SRQZEP meets industry standards.
7.What is the process for return or replacement of ADM2914-1SRQZEP?
All ADM2914-1SRQZEP units undergo pre-shipment inspection (PSI). If there is an issue with ADM2914-1SRQZEP, 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 ADM2914-1SRQZEP part is unused and in its original packaging.
Return procedure for ADM2914-1SRQZEP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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