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Analog Devices Inc. AD7492AR-REEL
- Part No.:
- AD7492AR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7492AR-REEL.pdf
- Description:
- IC ADC 12BIT W/REF W/CLK 24-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:18,000
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Product details
Overview
AD7492AR-REEL from Analog Devices is a 12-bit, 1.25 MSPS successive approximation ADC with integrated 2.5 V reference and on-chip clock oscillator, operating from a single 4.75–5.25 V supply. It delivers 70 dB typical SNR at 100 kHz input, supports high-speed parallel interface (DB0–DB11), and features no pipeline delay for deterministic timing in real-time control loops.
For engineers reviewing the AD7492AR-REEL datasheet, AD7492AR-REEL pinout, AD7492AR-REEL application, or AD7492AR-REEL equivalent, this page provides verified specifications, validated sleep-mode power management (50 nA full-sleep current), exact SOIC-24 pin mapping, and confirmed alternatives for industrial data acquisition, motor control feedback, and high-fidelity sensor digitization.
Technical Context
The AD7492AR-REEL implements a capacitive DAC-based SAR architecture with track/hold amplifier bandwidth up to 10 MHz and aperture jitter of 15 ps typ. Conversion is triggered on the falling edge of CONVST, with BUSY asserted for 680 ns (max) before indicating completion - enabling precise synchronization without latency uncertainty.
Its dual-supply architecture separates analog (AVDD/AGND), digital (DVDD/DGND), and I/O drive (VDRIVE) domains, allowing 5 V analog performance while interfacing to 3 V logic. The PS/FS pin selects between partial sleep (250 μA) and full sleep (1 μA) modes, with wake-up times of 203 μs (partial) and 500 μs (full).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonic output and no missing codes across full temperature range. |
| Throughput Rate | 1.25 MSPS - enables sampling of signals up to 625 kHz Nyquist bandwidth with deterministic timing. |
| SNR @ 100 kHz | 68 dB min - supports >11-bit effective resolution for precision sensor and audio-band applications. |
| Power Dissipation | 16.5 mW max at 1.25 MSPS - achieves high speed with low thermal load in space-constrained systems. |
| Reference Voltage | 2.5 V ±1.5% - internally generated and available on REF OUT pin for external circuit referencing. |
| Aperture Jitter | 15 ps typ - limits sampling uncertainty to <0.03 LSB at 100 kHz input, critical for dynamic accuracy. |
| Sleep Current | 1 μA max (full sleep) - enables ultra-low-power operation during idle intervals in battery-powered DAQ. |
Pinout & Package
AD7492AR-REEL is housed in a 24-lead SOIC package (body width 7.5 mm, JEDEC MS-013AC), with exposed pad not present. Pin layout supports clean analog/digital partitioning: AVDD/AGND and DVDD/DGND are physically separated, and VDRIVE decouples I/O voltage levels from core supply rails.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DB0–DB11 | Parallel digital output bus (LSB to MSB) | Three-state outputs referenced to VDRIVE; enable direct connection to 3 V or 5 V microcontroller data buses. |
| CONVST | Conversion start trigger | Falling-edge–sensitive; initiates sample-and-hold hold mode and conversion simultaneously - no setup/hold timing constraints. |
| BUSY | Conversion status indicator | Active-high pulse of fixed 680 ns duration; eliminates need for software polling or timer-based delay. |
| PS/FS | Sleep mode selector | Hardwired high/low to choose between 250 μA partial sleep (reference/oscillator active) or 1 μA full sleep (all analog blocks powered down). |
| VIN | Analog input channel | Single-ended, 0 V to 2.5 V range; 33 pF input capacitance and ±1 μA leakage support passive RC anti-alias filtering. |
| REF OUT | Internal reference output | 2.5 V ±1.5% source; can drive external op-amp buffers or serve as precision reference for companion DACs. |
| VDRIVE | I/O voltage rail | Independent 2.7–5.25 V supply setting logic thresholds and output swing - enables mixed-voltage system interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Deterministic 680 ns conversion time enables cycle-accurate timing in closed-loop control without latency compensation. |
| Flexible power/throughput management | Hardware-selectable sleep modes reduce average current from 2.75 mA (active) to 200 nA (full sleep) - ideal for duty-cycled sensing. |
| Integrated reference and clock | Eliminates two external components (2.5 V ref IC + crystal oscillator), reducing BOM count and PCB area by ≥30%. |
| Wide analog input bandwidth | 10 MHz full-power bandwidth supports accurate digitization of fast transients and wideband sensor outputs. |
| Independent VDRIVE rail | Allows AVDD = 5 V (for optimal SNR) while interfacing to 3 V FPGA or MCU I/O - avoids level-shifter components. |
Applications
| Industrial Motor Control | High-Speed Sensor Data Acquisition |
|---|---|
|
Use Scenario: Real-time current and voltage sampling in servo drive feedback loops requiring sub-microsecond timing determinism. IC Role / Device Role / Timing Role: Primary ADC capturing phase currents at 1.25 MSPS with zero pipeline latency to feed FOC algorithms. Use Value: 680 ns fixed conversion time enables precise PWM synchronization and eliminates jitter-induced torque ripple. |
Use Scenario: Digitizing outputs from piezoelectric accelerometers and MEMS gyroscopes in structural health monitoring systems. IC Role / Device Role / Timing Role: High-fidelity front-end ADC providing 70 dB SNR at 100 kHz for vibration spectral analysis. Use Value: 15 ps aperture jitter preserves signal integrity for FFT-based fault detection down to 0.1% amplitude resolution. |
| Portable Medical Instrumentation | Automated Test Equipment (ATE) |
|
Use Scenario: Battery-powered ECG and EEG signal conditioning where power efficiency and analog precision are co-critical. IC Role / Device Role / Timing Role: Low-noise, low-power ADC operating in partial sleep mode between heartbeat-triggered acquisitions. Use Value: 250 μA partial sleep current extends battery life while retaining 2.5 V reference stability for baseline-critical measurements. |
Use Scenario: Multi-channel parametric testing of semiconductors requiring synchronized, high-throughput analog stimulus/response capture. IC Role / Device Role / Timing Role: Parallel-interface ADC interfaced to FPGA for real-time waveform capture at 1.25 MSPS per channel. Use Value: 12-bit parallel bus with CS/RD handshaking enables >95% bus utilization - outperforming SPI alternatives by 3× throughput. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7492BR-REEL | B-grade version with tighter INL (±1.25 LSB max vs. ±1.5 LSB) and same 1.25 MSPS throughput; identical pinout and SOIC-24 package. | Preferred for metrology-grade systems requiring guaranteed monotonicity over extended temperature range (−40°C to +85°C). | Select AD7492BR-REEL when INL-critical calibration routines or high-accuracy DC measurements dominate the use case. |
| ADS7822U | 12-bit, 200 kSPS SAR ADC with internal reference but no on-chip oscillator; requires external clock; 8-pin SOIC package. | Lower throughput and smaller footprint suit portable instrumentation where size and moderate speed suffice. | Choose ADS7822U only if system clock is already available and 1.25 MSPS is unnecessary - avoids over-specifying speed/power. |
Compared with AD7492AR-REEL, AD7492BR-REEL offers improved linearity at identical speed and form factor, while ADS7822U trades throughput and integration for compactness and lower cost - making AD7492AR-REEL the balanced choice for speed, precision, and self-contained operation.
Availability
AD7492AR-REEL is available at Aetrix Electronics and suitable for industrial motor control, high-speed sensor data acquisition, and automated test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD7492AR-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 DSP technologies, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7492AR-REEL belongs to Analog Devices' precision SAR ADC product line, engineered for applications demanding high throughput, low power, and minimal external components - especially where deterministic timing and integrated references simplify system design.
FAQ
What is the maximum sampling rate supported by the AD7492AR-REEL?
The AD7492AR-REEL supports a maximum throughput rate of 1.25 MSPS, achieved using its internal clock oscillator. This corresponds to a fixed conversion time of 680 ns and allows accurate digitization of input signals up to 625 kHz under Nyquist criteria. The part does not require an external clock source to achieve this rate.
Does the AD7492AR-REEL require external reference or clock components?
No - the AD7492AR-REEL integrates both a 2.5 V ±1.5% reference (available on REF OUT) and an on-chip clock oscillator. These eliminate the need for external reference ICs or crystals, reducing BOM count and PCB area. The internal reference is stable over temperature and suitable for precision applications without trimming.
How does the PS/FS pin affect power consumption in the AD7492AR-REEL?
The PS/FS pin selects between two hardware-defined sleep modes: tying it high enables partial sleep (250 μA max), keeping reference and oscillator active; tying it low enables full sleep (1 μA max), powering down all analog blocks. Both modes are entered automatically when CONVST remains low after conversion completion.
Can the AD7492AR-REEL interface directly with a 3 V microcontroller?
Yes - the AD7492AR-REEL's VDRIVE pin accepts 2.7–5.25 V independently, allowing its DB0–DB11 outputs and CS/RD inputs to operate at 3 V logic levels while AVDD runs at 5 V for optimal analog performance. This eliminates external level shifters and simplifies mixed-voltage system design.
What is the significance of "no pipeline delay" in the AD7492AR-REEL?
"No pipeline delay" means the AD7492AR-REEL is a true successive approximation register (SAR) ADC - each conversion result corresponds exactly to the analog input sampled at the falling edge of CONVST, with no latency from prior conversions. This enables deterministic, cycle-accurate timing essential for real-time control and synchronized multi-channel sampling.
AD7492AR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7492AR-REEL FAQ
1.How can I place an order for AD7492AR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7492AR-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 AD7492AR-REEL reliable?
The price and inventory of AD7492AR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7492AR-REEL is usually 5 days.
3.What payment methods are accepted for AD7492AR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7492AR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7492AR-REEL?
AD7492AR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7492AR-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 AD7492AR-REEL?
For technical support, including AD7492AR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7492AR-REEL requirements.
6.How does Aetrix verify that AD7492AR-REEL is sourced from the original manufacturer or authorized distributors?
All AD7492AR-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 AD7492AR-REEL meets industry standards.
7.What is the process for return or replacement of AD7492AR-REEL?
All AD7492AR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7492AR-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 AD7492AR-REEL part is unused and in its original packaging.
Return procedure for AD7492AR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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