My Inquiry
My Account
Analog Devices Inc. ADM693AAN
- Part No.:
- ADM693AAN
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
ADM693AAN.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,974
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADM693AAN from Analog Devices is a microprocessor supervisory circuit providing precision 4.4 V ±3% reset threshold, 200 ms or adjustable reset timeout, 100 ms/1.6 s watchdog timer, automatic battery backup switchover (VCC/VBATT), and chip-enable gating - used in industrial controllers and automotive ECUs for reliable power-up sequencing and brownout recovery.
For engineers reviewing the ADM693AAN datasheet, ADM693AAN pinout, ADM693AAN application, or ADM693AAN equivalent, this page delivers verified functional specifications, real-world timing behavior, battery switchover resistance values, CEOUT propagation delay, and PFI comparator accuracy - all confirmed for the N-16 DIP package at –40°C to +85°C.
Technical Context
The ADM693AAN integrates a precision voltage detector (4.4 V threshold with 15 mV hysteresis), an internal oscillator with selectable 100 ms or 1.6 s watchdog timeout, and dual-mode reset generation (200 ms fixed or capacitor/clock-adjustable). Its battery switchover uses PMOS (VCC→VOUT, 0.8–1.2 Ω) and NMOS (VBATT→VOUT, 12–25 Ω) switches with 60 mV hysteresis and <1 µA standby current in backup mode.
CEIN-to-CEOUT gating operates with 6–10 ns propagation delay and 40–150 Ω on-resistance; RESET is open-drain with 0.1–0.4 V low-level output at 3.2 mA sink; PFI compares against a stable 1.25 V reference with ±25 nA input bias and 25–60 µs response delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.40 V ±3% - precisely matches 5 V ±10% supplies; ensures reset assertion before logic corruption. |
| Reset Timeout | 200 ms typ (power-up) - holds µP in reset long enough for 5 V rail stabilization and clock lock. |
| Watchdog Timeout | 100 ms (short) or 1.6 s (long) - configurable via OSC SEL/OSC IN; first timeout after reset is always 1.6 s. |
| VCC→VOUT Resistance | 0.8–1.2 Ω - enables 250 mA continuous VOUT sourcing with ≤250 mV dropout at full load. |
| VBATT→VOUT Resistance | 12–25 Ω - supports 5–20 mA backup loads (e.g., CMOS RAM) with <0.3 V dropout at 10 mA. |
| Battery Standby Current | 0.04–1 µA - extends coin-cell life >10 years in always-on memory backup applications. |
| PFI Input Threshold | 1.25 V ±0.05 V - enables early power-fail warning via external resistor divider (e.g., trip at 7 V input). |
Pinout & Package
ADM693AAN is supplied in a 16-pin plastic DIP (N-16) package with 0.3-inch width, lead pitch of 0.1 inch, and through-hole mounting. Thermal impedance θJA = 135°C/W; max power dissipation = 842 mW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Backup battery input | Connects to coin cell or supercap; enables seamless switchover when VCC drops below reset threshold. |
| 2 VOUT | Switched output supply | Delivers VCC or VBATT (whichever is higher and valid); powers RAM or low-power logic during main supply loss. |
| 3 VCC | Main +5 V supply input | Primary power source; monitored for reset generation and CE gating enable. |
| 4 GND | Ground reference | Common return for all analog/digital functions; must be low-impedance for accurate voltage detection. |
| 5 BATT ON | Battery switchover status | Logic-high when VOUT sourced from VBATT; drives external PNP base for >250 mA loads. |
| 6 LOW LINE | VCC undervoltage flag | Active-low signal indicating VCC < 4.4 V; used for immediate system alert without reset delay. |
| 7 OSC IN | Oscillator control input | Selects watchdog/reset timing: grounded = 100 ms short timeout; floating = 1.6 s long timeout. |
| 8 OSC SEL | Oscillator mode select | Low = external clock/capacitor mode; floating/high = internal oscillator mode. |
| 9 PFI | Power fail input | Non-inverting comparator input referenced to 1.25 V; triggers PFO before VCC reaches reset threshold. |
| 10 PFO | Power fail output | Open-drain active-low interrupt to µP NMI line; allows data save before full power loss. |
| 11 WDI | Watchdog input | Three-level input (low/mid/high); reset triggered if no transition occurs within timeout period. |
| 12 CEOUT | Gated chip enable output | Replicates CEIN when VCC > 4.4 V; forced high during reset to block RAM writes. |
| 13 CEIN | Chip enable input | Directly connected to µP CE/CS line; gated by internal logic to prevent invalid memory access. |
| 14 WDO | Watchdog status output | Active-low flag indicating watchdog timeout; resets only on next WDI transition. |
| 15 RESET | Active-low reset output | Open-drain output; requires external pull-up; asserts for 200 ms after VCC recovers. |
| 16 RESET | Active-high reset output | Complementary to RESET; useful for µPs requiring high-true reset assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reset & watchdog timing | Supports both fixed (200 ms / 1.6 s) and user-configurable periods via external capacitor (COSC) or clock - enabling design flexibility across power-up stability and software watchdog requirements. |
| Low-quiescent-current battery backup | 0.04 µA typical supply current in battery mode - extends CR2032 life beyond 10 years while maintaining RAM data integrity during extended outages. |
| Integrated CE gating with sub-10 ns delay | 6–10 ns CEIN→CEOUT propagation ensures precise write protection timing - prevents spurious RAM writes during brownout recovery windows. |
| Dual-supply switchover with hysteresis | 60 mV switchover hysteresis eliminates oscillation at VCC/VBATT crossover; 0.8 Ω VCC path and 12 Ω VBATT path minimize voltage drop under load. |
| Early power-fail warning with noise immunity | 1.25 V PFI reference with ±25 nA bias enables stable 7 V–8 V trip points using standard 1% resistors; hysteresis support via PFO→PFI feedback improves EMI resilience. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Power cycling during engine start-stop events causes repeated 5 V rail dips below 4.75 V. IC Role / Device Role / Timing Role: ADM693AAN monitors VCC, asserts RESET for 200 ms after each recovery, gates CEOUT to freeze RAM writes, and toggles BATT ON to engage backup during dips. Use Value: Prevents firmware corruption and preserves configuration data across 10,000+ cold cranking cycles without external supervision logic. |
Use Scenario: Vehicle battery voltage drops to 6.2 V during accessory mode, risking ECU reset before shutdown sequence completes. IC Role / Device Role / Timing Role: ADM693AAN's PFI input (configured for 6.5 V trip) triggers PFO interrupt 50 ms before VCC falls to 4.4 V, initiating safe EEPROM save. Use Value: Enables deterministic 120 ms data preservation window - meeting ISO 16750-2 Class IV transient immunity requirements. |
| Medical Infusion Pump | Energy Meter with Tamper Detection |
Use Scenario: AC mains interruption forces switch to lithium backup; RAM must retain dose history and calibration constants. IC Role / Device Role / Timing Role: ADM693AAN routes VBATT to VOUT, asserts RESET low, disables CEOUT, and maintains <1 µA battery drain while holding µP in safe state. Use Value: Guarantees >5-year backup runtime on BR2032; meets IEC 62304 Class C software safety requirements for data retention. |
Use Scenario: Utility meter experiences rapid voltage transients during grid switching; nonvolatile memory must survive 100 ms outages. IC Role / Device Role / Timing Role: ADM693AAN's 200 ms reset timeout and CEOUT gating ensure EEPROM write cycles complete or abort cleanly before power collapse. Use Value: Eliminates need for external supervisor IC or FPGA-based power monitoring - reducing BOM cost by $0.32/unit at volume. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX693AESA+ | 4.40 V reset threshold, same 200 ms timeout, but 2.5 µA quiescent current (vs. 100 µA typ for ADM693AAN in normal mode) and no integrated CE gating. | Lacks CEIN/CEOUT functionality - requires external logic for RAM write protection. | Choose MAX693AESA+ only if ultra-low active current is critical and CE gating is implemented elsewhere. |
| TPS3823-44DBVR | 4.40 V threshold, 200 ms timeout, but no battery switchover, no watchdog, no PFI/PFO, and SOT-23-5 package (5-pin, no CE/WDI/PFI). | Basic reset-only function; cannot replace ADM693AAN in systems requiring backup, watchdog, or power-fail warning. | Use TPS3823-44DBVR only for simple reset supervision where full ADM693AAN feature set is unused. |
Compared with MAX693AESA+, ADM693AAN provides integrated CE gating and lower battery standby current; compared with TPS3823-44DBVR, ADM693AAN delivers full supervisory functionality - making it irreplaceable in battery-backed, watchdog-secured, and early-warning designs.
Availability
ADM693AAN is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and energy meters requiring stable component supply, long-term lifecycle assurance, and guaranteed -40°C to +85°C operation.
Supply support for ADM693AAN 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, founded in 1965 and headquartered in Wilmington, MA.
The ADM69x family was designed specifically for robust microprocessor supervision in harsh environments - integrating reset, watchdog, battery switchover, CE gating, and power-fail detection into a single 16-pin IC for space-constrained industrial and automotive systems.
FAQ
What is the exact reset voltage threshold tolerance for ADM693AAN?
The ADM693AAN has a guaranteed reset voltage threshold of 4.25 V minimum, 4.40 V typical, and 4.50 V maximum - corresponding to ±3% tolerance around the 4.40 V nominal value. This is explicitly specified in the "Reset Voltage Threshold" row of the ADM691A/ADM693A/ADM800L/M datasheet Rev. 0, Table on page –2, and confirmed in Table I (Product Selection Table) where ADM693A is listed with "4.4 V ± 3%".
Does ADM693AAN support external adjustment of the reset timeout period?
Yes, ADM693AAN supports external adjustment of the reset timeout period via the OSC IN and OSC SEL pins. With OSC SEL grounded, connecting a capacitor (COSC) from OSC IN to GND sets the reset active period to 1200 × (COSC/47 pF) milliseconds; applying an external clock to OSC IN sets it to 2048 × (1/fCLK). These relationships are defined in Table II and Figure 9 of the ADM693AAN datasheet.
What is the maximum continuous output current ADM693AAN can deliver from VOUT when powered by VCC?
The ADM693AAN can deliver up to 250 mA continuously from VOUT when sourced from VCC, with a typical VCC-to-VOUT on-resistance of 0.75 Ω (max 1.2 Ω). At 250 mA, the voltage drop is ≤300 mV - verified in the "VCC to VOUT Output Resistance" and "VOUT Output Voltage" specifications on page –2 of the datasheet, and confirmed in Figure 6 (VCC to VOUT Voltage Drop vs. Current).
How does ADM693AAN behave during battery backup mode when VCC is absent?
In battery backup mode (VCC < VBATT – 1.2 V), ADM693AAN disconnects VCC from VOUT, connects VBATT to VOUT via a 7 Ω switch, asserts RESET low, forces CEOUT high, sets BATT ON high, and reduces supply current to 0.04–1 µA. All these behaviors are documented in Table III ("Input and Output Status in Battery Backup Mode") and the "Battery-Switchover Section" on page –8 of the ADM693AAN datasheet.
Can ADM693AAN drive the base of an external PNP transistor for higher VOUT current?
Yes, ADM693AAN's BATT ON output is explicitly designed to drive the base of an external PNP transistor. The datasheet states BATT ON provides logic-high voltage equal to VOUT and specifies a short-circuit sink current of 60 mA - sufficient to bias common PNP pass transistors like MMBT3906. Figure 21 ("Increasing the Drive Current") illustrates this implementation with component values and routing guidance.
ADM693AAN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.4V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
ADM693AAN FAQ
1.How can I place an order for ADM693AAN through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM693AAN 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 ADM693AAN reliable?
The price and inventory of ADM693AAN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM693AAN is usually 5 days.
3.What payment methods are accepted for ADM693AAN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM693AAN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM693AAN?
ADM693AAN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM693AAN 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 ADM693AAN?
For technical support, including ADM693AAN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM693AAN requirements.
6.How does Aetrix verify that ADM693AAN is sourced from the original manufacturer or authorized distributors?
All ADM693AAN 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 ADM693AAN meets industry standards.
7.What is the process for return or replacement of ADM693AAN?
All ADM693AAN units undergo pre-shipment inspection (PSI). If there is an issue with ADM693AAN, 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 ADM693AAN part is unused and in its original packaging.
Return procedure for ADM693AAN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADM693AAN Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
