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Analog Devices Inc. AD7492ARUZ-REEL
- Part No.:
- AD7492ARUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7492ARUZ-REEL.pdf
- Description:
- IC ADC 12BIT SAR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,930
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Product details
Overview
AD7492ARUZ-REEL from Analog Devices is a 12-bit successive approximation ADC with internal 2.5 V reference and on-chip clock oscillator, operating from a single 2.7 V to 5.25 V supply. It delivers 1.25 MSPS throughput (AD7492-5 variant), 70 dB typical SNR at 100 kHz input, and 680 ns conversion time - enabling high-speed data acquisition in compact industrial sensor interfaces and portable instrumentation.
For engineers reviewing the AD7492ARUZ-REEL datasheet, AD7492ARUZ-REEL pinout, AD7492ARUZ-REEL application, or AD7492ARUZ-REEL equivalent, key selection considerations include its no-pipeline-delay architecture, flexible VDRIVE-controlled I/O voltage levels, dual sleep modes (full/partial), 24-lead TSSOP package, and integrated reference/oscillator eliminating external components.
Technical Context
The AD7492ARUZ-REEL implements a capacitive DAC-based SAR architecture with track/hold amplifier supporting up to 10 MHz full-power bandwidth. Conversion is initiated on the falling edge of CONVST, with BUSY signaling completion after 680 ns (AD7492-5 speed grade), and no pipeline latency ensures deterministic timing for real-time control loops.
Its digital interface uses CS and RD to enable three-state parallel output (DB0–DB11), while VDRIVE independently sets logic thresholds and output drive levels - allowing AVDD/DVDD to run at 5 V for optimal analog performance while interfacing to 3 V microcontrollers. Sleep mode selection (PS/FS pin) enables dynamic power scaling from 200 nA (full sleep) to 2.75 mA (1.25 MSPS normal mode).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 610 µV step size with 2.5 V reference, sufficient for precision sensor digitization. |
| Throughput Rate | 1.25 MSPS - supports real-time sampling of signals up to ~500 kHz Nyquist bandwidth without aliasing. |
| SNR | 70 dB typ @ 100 kHz - enables >11.3 effective bits for clean measurement of medium-frequency analog inputs. |
| Conversion Time | 680 ns max - guarantees deterministic latency for time-critical trigger-and-capture systems. |
| Power Dissipation | 16.5 mW max @ 1.25 MSPS, 5 V - achieves high speed with low thermal load in space-constrained PCBs. |
| Reference | 2.5 V internal ±1.5% - eliminates need for external reference IC and associated layout complexity. |
| Sleep Current | 200 nA typ (full sleep) - extends battery life in intermittent-sampling applications like environmental monitors. |
Pinout & Package
AD7492ARUZ-REEL is housed in a 24-lead TSSOP package (RU-24), RoHS-compliant, with 0.65 mm lead pitch and exposed pad for thermal enhancement. Pin functions are validated per Analog Devices Rev. A datasheet Figure 3 and Table 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DB0–DB11 | Parallel digital output bus (LSB to MSB) | Three-state outputs driven by VDRIVE; enable direct connection to 3 V or 5 V microcontroller data buses. |
| CONVST | Conversion start trigger | Falling-edge–initiated sampling and conversion; double-function: initiates capture and selects sleep mode if held low post-conversion. |
| BUSY | Conversion status indicator | Active-high signal asserts for exact 680 ns, then falls - provides precise timing window for data readback without polling overhead. |
| CS / RD | Parallel interface handshaking | Interchangeable active-low controls; both must fall to place conversion result on DBx bus - simplifies FPGA/microcontroller timing design. |
| VIN | Analog input channel | Single-ended, 0 V to 2.5 V range; 33 pF input capacitance and ±1 µA leakage support high-impedance sensor interfacing with minimal loading. |
| REF OUT | Internal reference output | 2.5 V ±1.5% buffered source - usable as precision reference for external circuitry (e.g., sensor excitation or comparator thresholds). |
| PS/FS | Sleep mode selector | Hardware-configured pin: tied high → partial sleep (250 µA); tied low → full sleep (200 nA) - enables board-level power policy control. |
| VDRIVE | Digital I/O supply rail | Decouples logic interface voltage from AVDD/DVDD - allows mixed-voltage system integration without level shifters. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Successive approximation architecture ensures single-cycle deterministic latency - critical for closed-loop feedback timing predictability. |
| Integrated 2.5 V reference + clock | Removes two external components (ref IC + crystal/oscillator), reducing BOM count, PCB area, and calibration effort. |
| VDRIVE-controlled I/O levels | Enables seamless interfacing between 5 V analog core and 3 V digital logic domains without discrete level translators. |
| Dual hardware-selectable sleep modes | Full sleep (200 nA) and partial sleep (250 µA) provide granular power management for duty-cycled acquisition systems. |
| 10 MHz full-power analog bandwidth | Supports accurate digitization of fast transients and wideband sensor outputs (e.g., piezoelectric accelerometers, ultrasonic receivers). |
Applications
| Industrial Sensor Interface | Portable Data Logger |
|---|---|
Use Scenario: Digitizing outputs from strain gauges, RTDs, and pressure transducers in factory-floor PLC modules. IC Role / Device Role / Timing Role: Primary ADC capturing analog sensor signals at ≤1 MSPS with synchronized sampling across multiple channels via shared CONVST. Use Value: Internal 2.5 V reference ensures stable gain over temperature; 70 dB SNR preserves resolution of low-level mV-range signals without external amplification. |
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and air quality over weeks on coin-cell power. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during measurement bursts, entering full sleep (200 nA) between samples. Use Value: Full sleep current <0.25 µA extends battery life >1 year; VDRIVE allows direct connection to 3.3 V MCU without voltage translation losses. |
| Medical Instrumentation Front-End | Test & Measurement Equipment |
Use Scenario: ECG/EEG signal conditioning module requiring low-noise, low-latency digitization of biopotential waveforms. IC Role / Device Role / Timing Role: High-fidelity analog front-end ADC with 10 MHz bandwidth and 15 ps aperture jitter for sub-microsecond timing accuracy. Use Value: 680 ns conversion time and no pipeline delay enable precise R-wave detection and beat-to-beat interval analysis in real time. |
Use Scenario: Benchtop oscilloscope auxiliary channel or automated test fixture capturing transient events in power electronics. IC Role / Device Role / Timing Role: High-speed parallel ADC interfaced to FPGA for real-time waveform capture at 1.25 MSPS with minimal interface overhead. Use Value: Parallel DB0–DB11 interface reduces FPGA resource usage vs. serial protocols; BUSY signal eliminates need for fixed delay timing loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit parallel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, SPI interface, no internal reference - requires external REF and clock; 1 MSPS max. | Lower resolution and serial interface limit use in high-accuracy, high-throughput parallel-bus systems. | Select only when 8-bit precision suffices and PCB space constraints favor SO-8 packaging over TSSOP-24. |
| MAX1166BCAP+ | 12-bit, parallel interface, but no internal reference or clock - needs external REF and CLK; 250 kSPS max. | Limited throughput and external component dependency increase BOM cost and layout complexity vs. AD7492ARUZ-REEL. | Consider only for legacy designs already using MAX1166 footprint and where 250 kSPS meets timing requirements. |
Compared with ADS7822U and MAX1166BCAP+, AD7492ARUZ-REEL uniquely integrates reference and clock while delivering 1.25 MSPS parallel throughput - reducing system-level component count, timing uncertainty, and power management complexity in new designs.
Availability
AD7492ARUZ-REEL is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable data loggers, medical instrumentation front-ends, and test & measurement equipment requiring stable component supply, long-term manufacturability, and guaranteed RoHS compliance.
Supply support for AD7492ARUZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7492 product line delivers high-speed, low-power 12-bit SAR ADCs optimized for space-constrained, battery-sensitive, and real-time acquisition systems - emphasizing integrated references, flexible power management, and deterministic timing.
FAQ
What is the maximum sampling rate supported by the AD7492ARUZ-REEL?
The AD7492ARUZ-REEL is the AD7492-5 speed grade, specified for 1.25 MSPS maximum throughput. This is achieved with a 680 ns conversion time and 120 ns acquisition time, confirmed in Table 1 of the Rev. A datasheet under AD7492-5 specifications. The part maintains full 12-bit performance at this rate with 70 dB typical SNR at 100 kHz input frequency.
Does the AD7492ARUZ-REEL require an external reference or clock source?
No - the AD7492ARUZ-REEL includes a 2.5 V internal reference (±1.5% tolerance) available at the REF OUT pin and an on-chip clock oscillator. These integrated resources eliminate the need for external reference ICs or timing crystals, reducing component count and PCB area. The internal clock determines the conversion rate, and no external clock input is provided.
How does the PS/FS pin affect power consumption in the AD7492ARUZ-REEL?
The PS/FS pin selects between two hardware-defined sleep modes: tied high enables partial sleep (250 µA max quiescent current), where reference and oscillator remain active; tied low enables full sleep (1 µA max, 200 nA typical), powering down all analog circuitry. This selection occurs automatically when CONVST is held low past conversion completion, as defined in the Functional Block Diagram and Pin Function Descriptions.
What package type is used for the AD7492ARUZ-REEL, and is it RoHS-compliant?
The AD7492ARUZ-REEL uses a 24-lead TSSOP package (RU-24), with "-REEL" denoting tape-and-reel packaging for automated assembly. It is RoHS-compliant and lead-free, as confirmed by Analog Devices' ordering guide and material declarations. The package features an exposed pad for enhanced thermal performance and is pin-compatible with the SOIC-24 variant (AD7492ARZ) but with reduced footprint.
Can the AD7492ARUZ-REEL interface directly with a 3 V microcontroller?
Yes - the VDRIVE pin allows independent setting of digital I/O voltage levels. By applying 3 V to VDRIVE, the AD7492ARUZ-REEL's DB0–DB11 outputs swing to 3 V logic levels and its CS/RD/CONVST inputs recognize 3 V thresholds, enabling direct connection to 3 V MCUs. Meanwhile, AVDD/DVDD can remain at 5 V to maximize analog performance, as detailed in the Logic Inputs and Outputs sections of the datasheet.
AD7492ARUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7492ARUZ-REEL FAQ
1.How can I place an order for AD7492ARUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7492ARUZ-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 AD7492ARUZ-REEL reliable?
The price and inventory of AD7492ARUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7492ARUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7492ARUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7492ARUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7492ARUZ-REEL?
AD7492ARUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7492ARUZ-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 AD7492ARUZ-REEL?
For technical support, including AD7492ARUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7492ARUZ-REEL requirements.
6.How does Aetrix verify that AD7492ARUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7492ARUZ-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 AD7492ARUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7492ARUZ-REEL?
All AD7492ARUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7492ARUZ-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 AD7492ARUZ-REEL part is unused and in its original packaging.
Return procedure for AD7492ARUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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