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Analog Devices Inc. ADM696ARZ-REEL
- Part No.:
- ADM696ARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADM696ARZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,666
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Product details
Overview
ADM696ARZ-REEL from Analog Devices is a microprocessor supervisory circuit with integrated battery switchover, watchdog timer, power-fail detection, and reset generation. It provides VOUT switching between VCC (3.0–5.5 V) and VBATT (2.0–VCC−0.3 V), 1.3 V low-line threshold, 50 ms reset pulse width, and 100 mA VOUT drive - used in embedded systems requiring reliable power-up/down sequencing and nonvolatile memory backup.
For engineers reviewing the ADM696ARZ-REEL datasheet, ADM696ARZ-REEL pinout, ADM696ARZ-REEL application, or ADM696ARZ-REEL equivalent, this page delivers verified functional identity, validated SOIC-16 pin mapping, confirmed battery switchover behavior, exact watchdog timeout options (100 ms/1.6 s/adjustable), and real-world design implications for reset assertion down to 1 V VCC.
Technical Context
The ADM696ARZ-REEL integrates a precision 1.3 V reference comparator for LLIN and PFI inputs, an internal oscillator with OSC SEL–controlled mode selection (internal/external clock/capacitor), and dual-mode watchdog logic that defaults to 1.6 s after reset then transitions to 100 ms on first WDI transition. Its battery switchover uses hysteresis (50 mV drop, 70 mV rise) to prevent oscillation near VCC = VBATT.
RESET is active-low and guaranteed functional at VCC ≥ 1 V; WDO is active-low watchdog status output; BATT ON is open-drain capable of sinking 7 mA; and VOUT delivers ≤100 mA with <0.5 V dropout at full load. All digital outputs are CMOS-compatible with rail-to-rail sourcing/sinking capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.0 V to 5.5 V - supports standard 3.3 V and 5 V microprocessor rails without external regulation. |
| VBATT Range | 2.0 V to (VCC − 0.3 V) - enables lithium coin cell (2.0–3.6 V) or supercapacitor backup without overvoltage risk. |
| Reset Threshold | 1.3 V ±50 mV - precise low-line detection for VCC monitoring with 12 mV hysteresis for noise immunity. |
| Reset Pulse Width | 35–70 ms - configurable via OSC SEL/OSC IN; ensures stable processor initialization during power-up. |
| Watchdog Timeout | 100 ms (short) or 1.6 s (long), or adjustable - prevents infinite loops while accommodating boot-time delays. |
| VOUT Drive | 100 mA max at ≤0.5 V dropout - powers CMOS RAM directly; eliminates need for external pass transistor in most designs. |
| Supply Current | 1–1.95 mA (active), 0.6–1 µA (battery backup) - enables >10-year coin-cell life in standby. |
Pinout & Package
ADM696ARZ-REEL is housed in a 16-pin SOIC (R-16) package, 7.5 mm × 10.3 mm body, 1.27 mm pitch, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 4) | Ground reference | Common return for all analog/digital functions; must be low-impedance connection to system ground plane. |
| VBATT (Pin 1) | Battery input | Backup source; internally compared to VCC to trigger switchover; connect to GND if unused. |
| VOUT (Pin 2) | Switched output | Delivers VCC or VBATT (whichever higher) to RAM; rated for 100 mA continuous, 1 V minimum VCC operation. |
| PFI (Pin 9) | Power fail input | Noninverting comparator input referenced to 1.3 V; triggers PFO low when supply drops below threshold. |
| PFO (Pin 10) | Power fail output | Active-low interrupt signal; used to initiate graceful shutdown before main supply collapse. |
| WDO (Pin 14) | Watchdog output | Active-low status flag; goes low on WDI timeout and resets only on next WDI transition. |
| VCC (Pin 3) | Main supply input | Primary power rail; powers internal circuitry and feeds VOUT during normal operation. |
| RESET (Pin 15) | Active-low reset | Drives µP RESET pin; asserted when LLIN < 1.3 V or watchdog un-serviced; holds low ≥50 ms after recovery. |
| BATT ON (Pin 5) | Battery-on indicator | Open-drain output high during battery backup; can directly drive base of external PNP for >100 mA VOUT. |
| LOW LINE (Pin 6) | Low-line status | Active-low signal mirroring LLIN comparator state; used for system-level voltage warning independent of RESET. |
| OSC IN (Pin 7) | Oscillator input | Accepts external clock (0–250 kHz) or capacitor (e.g., 47 pF for ~1.6 s timeout); sets timing when OSC SEL = low. |
| OSC SEL (Pin 8) | Oscillator select | High/floating = internal oscillator; low = external timing source; includes 5 µA internal pullup. |
| RESET (Pin 16) | Active-high reset | Inverted complement of Pin 15; interfaces with processors requiring active-high reset assertion. |
| LLIN (Pin 13) | Low-line input | Monitors regulated supply via resistor divider; 1.3 V threshold with 12 mV hysteresis ensures clean reset edge. |
| WDI (Pin 11) | Watchdog input | Three-level input (low/mid/high); toggling required within timeout period; floating disables watchdog. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reset & watchdog timing | Configurable via OSC SEL/OSC IN to support 100 ms, 1.6 s, or user-defined periods - accommodates diverse boot sequences and software loop constraints. |
| Guaranteed reset at 1 V VCC | Ensures microprocessor remains held in reset even during deep brownout, preventing undefined execution states. |
| Integrated battery switchover | Automatic, hysteresis-controlled switching between VCC and VBATT with <50 mV dropout - preserves RAM data without external MOSFETs. |
| Low-power battery backup mode | 0.6–1 µA supply current with VCC = 0 V - extends 3 V coin-cell life beyond 10 years in typical applications. |
| Dual reset outputs | Simultaneous active-low (Pin 15) and active-high (Pin 16) RESET signals - eliminates need for external inverters across µP families. |
Applications
| Industrial PLC Power Monitoring | Automotive Infotainment Memory Backup |
|---|---|
|
Use Scenario: Continuous operation in factory-floor controllers where mains power interruption must preserve I/O state and configuration registers. IC Role / Device Role / Timing Role: ADM696ARZ-REEL monitors 5 V rail via LLIN, asserts RESET on brownout, switches VOUT to VBATT to retain SRAM contents, and triggers PFO for controlled firmware save. Use Value: Prevents loss of calibration data and machine state during transient outages; eliminates need for external supervisor + battery switch IC. |
Use Scenario: Head unit powered from vehicle battery with ignition-switched 12 V input, requiring persistent memory retention during engine start cycles. IC Role / Device Role / Timing Role: ADM696ARZ-REEL detects VCC sag below 4.2 V using PFI divider, initiates PFO interrupt for EEPROM write, and maintains VOUT from VBATT during cranking. Use Value: Enables zero-data-loss operation during 500 ms, 6 V cranking dips; BATT ON drives external PNP to sustain 150 mA RAM load. |
| Medical Patient Monitor Data Integrity | Point-of-Sale Terminal Battery Switchover |
|
Use Scenario: Portable diagnostic device with lithium coin-cell backup, where unexpected power loss must preserve last vital-sign readings. IC Role / Device Role / Timing Role: ADM696ARZ-REEL uses LLIN to monitor 3.3 V LDO output, generates 50 ms RESET pulse on failure, and activates VOUT→VBATT path to keep SRAM alive. Use Value: Guarantees >10-year backup runtime with CR2032; 1.3 V threshold aligns with safe RAM retention voltage. |
Use Scenario: Retail terminal with flash-based firmware and battery-backed RTC/SRAM, requiring seamless transition during AC power loss. IC Role / Device Role / Timing Role: ADM696ARZ-REEL monitors 5 V supply via PFI, asserts PFO to trigger NVRAM save, and switches VOUT to VBATT to maintain RTC and transaction log. Use Value: Eliminates external diode-OR and supervisor IC; 20 mV switchover hysteresis prevents chatter during marginal line conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX696CSA+ | Pin-compatible but lacks adjustable watchdog; fixed 1.6 s timeout only; no OSC IN/OSC SEL flexibility. | Suitable for simpler systems where software cannot toggle WDI within 100 ms window. | Select MAX696CSA+ only if fixed-timing suffices and SOIC-8 footprint is acceptable (ADM696ARZ-REEL is SOIC-16). |
| TPS3823DBVR | No battery switchover; single VDD supply; 3.08 V fixed reset threshold; no PFI/PFO or WDI/WDO functionality. | Limited to basic reset supervision without power-fail warning or memory backup control. | Choose TPS3823DBVR only for cost-sensitive, single-rail applications lacking battery backup or watchdog requirements. |
Compared with MAX696CSA+ and TPS3823DBVR, the ADM696ARZ-REEL uniquely combines battery switchover, dual-mode watchdog, and programmable timing in one SOIC-16 package - enabling compact, feature-complete supervision where memory retention and fail-safe recovery are mandatory.
Availability
ADM696ARZ-REEL is available at Aetrix Electronics and suitable for industrial PLCs, automotive infotainment units, medical patient monitors, and point-of-sale terminals requiring stable component supply with long-term lifecycle assurance.
Supply support for ADM696ARZ-REEL 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 ADM696ARZ-REEL belongs to Analog Devices' microprocessor supervisory product line, engineered specifically for robust power monitoring, battery-backed memory protection, and fail-safe system recovery in mission-critical embedded environments.
FAQ
What is the minimum VCC voltage at which ADM696ARZ-REEL guarantees RESET assertion?
ADM696ARZ-REEL guarantees active-low RESET assertion down to VCC = 1 V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures the microprocessor remains held in reset during deep brownout conditions where other supervisors may release prematurely. The internal reset generator continues functioning at this voltage, making ADM696ARZ-REEL suitable for ultra-low-voltage recovery scenarios in battery-powered systems.
How does ADM696ARZ-REEL handle battery switchover hysteresis, and why is it critical?
ADM696ARZ-REEL implements 20 mV hysteresis in its battery switchover comparator: switchover occurs at VCC − VBATT = 70 mV (rising) and 50 mV (falling). This prevents rapid oscillation when VCC decays slowly near VBATT voltage, which could cause VOUT instability and RAM corruption. The hysteresis is intrinsic to the comparator design and requires no external components - a key reliability feature distinguishing ADM696ARZ-REEL from discrete switch solutions.
Can ADM696ARZ-REEL's watchdog timer be disabled, and how?
Yes, ADM696ARZ-REEL's watchdog timer is disabled when WDI (Pin 11) is left floating or driven to midsupply (~38% of VCC). This is achieved by internal biasing and high-impedance disconnect - no external pull-up/down is needed. When disabled, WDO remains high and RESET is unaffected by WDI state. This behavior is explicitly documented in the PIN FUNCTION DESCRIPTION and CIRCUIT INFORMATION sections of the datasheet.
What is the maximum continuous output current ADM696ARZ-REEL can deliver on VOUT, and under what conditions?
ADM696ARZ-REEL delivers up to 100 mA continuously on VOUT (Pin 2) with VCC ≥ 3.0 V, as specified in the "BATTERY BACKUP SWITCHING" section. At 100 mA load, VOUT = VCC − 0.5 V (typical), ensuring sufficient headroom for CMOS RAM operation. Exceeding 100 mA requires an external PNP transistor driven by BATT ON (Pin 5), as detailed in Figure 14 of the datasheet.
Does ADM696ARZ-REEL support both active-low and active-high reset outputs simultaneously?
Yes, ADM696ARZ-REEL provides simultaneous active-low RESET (Pin 15) and active-high RESET (Pin 16) outputs. These are true complements - when Pin 15 is low, Pin 16 is high, and vice versa - enabling direct interface with microprocessors requiring either polarity without external logic. Both outputs are fully specified across temperature and load conditions in the Electrical Characteristics table.
ADM696ARZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.3V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 35ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADM696ARZ-REEL FAQ
1.How can I place an order for ADM696ARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM696ARZ-REEL 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 ADM696ARZ-REEL reliable?
The price and inventory of ADM696ARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM696ARZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM696ARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM696ARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM696ARZ-REEL?
ADM696ARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM696ARZ-REEL 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 ADM696ARZ-REEL?
For technical support, including ADM696ARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM696ARZ-REEL requirements.
6.How does Aetrix verify that ADM696ARZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM696ARZ-REEL 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 ADM696ARZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM696ARZ-REEL?
All ADM696ARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM696ARZ-REEL, 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 ADM696ARZ-REEL part is unused and in its original packaging.
Return procedure for ADM696ARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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