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Analog Devices Inc. AD7492BRU-5
- Part No.:
- AD7492BRU-5
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7492BRU-5.pdf
- Description:
- IC ADC 12BIT W/REF W/CLK 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,835
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Product details
Overview
AD7492BRU-5 from Analog Devices is a 12-bit, 1.25 MSPS successive approximation ADC with integrated 2.5 V reference and on-chip clock oscillator. It operates from a single 4.75–5.25 V supply, delivers 70 dB typical SNR at 100 kHz input, and features no pipeline delay for deterministic timing in high-speed data acquisition systems used in industrial instrumentation and real-time control.
For engineers reviewing the AD7492BRU-5 datasheet, AD7492BRU-5 pinout, AD7492BRU-5 application, or AD7492BRU-5 equivalent, key selection considerations include its 680 ns conversion time, flexible VDRIVE interface voltage control, dual sleep modes (full/partial), parallel 12-bit output with CS/RD handshaking, and SOIC/TSSOP package compatibility for space-constrained PCB layouts.
Technical Context
The AD7492BRU-5 implements a capacitive DAC-based SAR architecture with track/hold amplifier bandwidth up to 10 MHz. Its conversion is initiated on the falling edge of CONVST, and BUSY asserts for exactly 680 ns before going low - indicating completion with zero latency between sampling and result availability.
It uses internal 2.5 V ±1.5% reference and oscillator, eliminating external components. The VDRIVE pin independently sets digital I/O voltage levels (2.7–5.25 V), enabling seamless interfacing with 3 V logic while analog circuitry runs at 5 V for optimal dynamic performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - supports 4096 discrete output codes for precision measurement applications |
| Throughput Rate | 1.25 MSPS - enables real-time sampling of signals up to 625 kHz Nyquist bandwidth |
| Conversion Time | 680 ns max - guarantees deterministic timing with no pipeline delay for synchronized control loops |
| SNR @ 100 kHz | 68 dB min - ensures ≥11.3 effective bits for high-fidelity signal reconstruction |
| Power Dissipation | 16.5 mW max at 1.25 MSPS - achieves high speed with ultra-low power for thermally sensitive designs |
| Reference Voltage | 2.5 V ±1.5% - stable internal reference eliminates need for external precision REF IC or resistor network |
| Sleep Current | 1 μA max full sleep - reduces standby power by >3000× vs active mode for battery-operated systems |
Pinout & Package
AD7492BRU-5 is housed in a 24-lead TSSOP package (RU suffix), pin-compatible with the SOIC variant (AD7492BRZ). Thermal resistance θJA = 115°C/W supports operation up to +85°C ambient without forced airflow.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| DB0–DB11 | Parallel Data Output | 12-bit three-state outputs driven by VDRIVE voltage; enable direct connection to 3 V or 5 V microcontroller data buses |
| CONVST | Conversion Start Input | Falling-edge-triggered sample-and-hold control; duration ≥10 ns; low-hold enables automatic sleep entry |
| BUSY | Status Output | Active-high pulse lasting exactly 680 ns - provides precise hardware timing for interrupt-driven or DMA-based readout |
| CS / RD | Parallel Interface Control | AND-gated inputs controlling data bus enable; both can be hardwired low for simplified interface |
| VIN | Analog Input | Single-ended 0–2.5 V input with 33 pF capacitance and ±1 μA leakage - requires minimal external drive capability |
| REF OUT | Reference Output | 2.5 V ±1.5% buffered reference available for external circuitry or ratiometric sensor excitation |
| VDRIVE | Digital I/O Supply | Independent 2.7–5.25 V rail setting logic thresholds and output swing - decouples digital interface from analog supply noise |
| PS/FS | Sleep Mode Select | Hardware-configured pin selecting partial (250 μA) or full (1 μA) sleep current based on system wake-up latency requirements |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Guaranteed single-cycle conversion with BUSY-to-data-read timing fully defined - eliminates synchronization uncertainty in closed-loop systems |
| Internal clock & reference | Removes two external components (crystal oscillator + reference IC), reducing BOM count, board area, and calibration complexity |
| VDRIVE interface flexibility | Allows AVDD/DVDD to run at 5 V for optimal SNR while interfacing directly to 3 V FPGA or MCU I/O banks without level shifters |
| Dual sleep modes | Full sleep (1 μA) for long idle periods; partial sleep (250 μA) for sub-microsecond wake-up - enables adaptive power management in burst-mode acquisition |
| High input bandwidth | 10 MHz full-power bandwidth supports accurate digitization of fast transients and wideband sensor outputs without external anti-aliasing filtering |
Applications
| Industrial PLC Analog Input Module | Medical Patient Monitor Signal Chain |
|---|---|
Use Scenario: Digitizing multiple 4–20 mA current loop sensor outputs in programmable logic controller backplanes with tight timing constraints. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized multi-channel voltage representations of process variables (pressure, temperature, flow) at 1 MSPS+ rates. Use Value: 680 ns conversion time enables deterministic sampling across 8+ channels within one microcontroller instruction cycle, supporting real-time PID execution. |
Use Scenario: High-fidelity acquisition of ECG, EEG, or EMG bio-signals requiring low-noise, low-distortion digitization in portable diagnostic devices. IC Role / Device Role / Timing Role: Front-end ADC converting amplified analog biopotentials into 12-bit digital streams for onboard DSP or wireless transmission. Use Value: 70 dB SNR at 100 kHz and −87 dB THD ensure clinical-grade waveform fidelity; internal 2.5 V reference eliminates drift-induced baseline errors. |
| Automotive Battery Management System (BMS) | Test & Measurement Equipment Front End |
Use Scenario: Monitoring cell voltages and pack temperatures in EV battery packs under harsh EMI conditions and wide temperature ranges. IC Role / Device Role / Timing Role: Precision voltage digitizer interfaced to isolated sigma-delta modulators or direct-sense resistors, operating in partial sleep mode between measurements. Use Value: 12-bit resolution with ±1.25 LSB INL and ±0.9 LSB DNL meets ISO 26262 ASIL-B accuracy requirements; 115°C/W θJA supports under-hood thermal design. |
Use Scenario: High-speed data capture in oscilloscopes, spectrum analyzers, and automated test equipment requiring consistent throughput and low jitter. IC Role / Device Role / Timing Role: Core sampling element in multi-channel acquisition cards where aperture jitter (15 ps typ) defines system-level ENOB at high frequencies. Use Value: 15 ps aperture jitter limits timing uncertainty to <0.02° phase error at 100 kHz - critical for vector signal analysis and harmonic distortion testing. |
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, 200 kSPS, SPI interface, no internal reference - lower resolution, serial interface, higher power per sample | Cost-sensitive, low-channel-count portable instruments where 8-bit resolution suffices | Select only if resolution ≤8 bits and serial interface preferred over parallel bus timing control |
| MAX1166BCAP+ | 12-bit, 250 kSPS, internal reference, SPI interface - slower throughput, different interface protocol, same resolution class | Space-constrained embedded systems using existing SPI infrastructure and not requiring >250 kSPS | Choose when board layout favors SPI routing and throughput ≤250 kSPS satisfies system requirements |
Compared with ADS7822U and MAX1166BCAP+, the AD7492BRU-5 uniquely delivers 1.25 MSPS parallel throughput with internal clock/reference in a TSSOP package - making it the only option among the three suitable for deterministic, high-speed, low-component-count data acquisition where timing predictability and minimal external BOM are mandatory.
Availability
AD7492BRU-5 is available at Aetrix Electronics and suitable for industrial PLCs, medical patient monitors, automotive BMS modules, and test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AD7492BRU-5 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, with design centers worldwide.
The AD7492 family was engineered for high-speed, low-power, single-supply data acquisition in space- and power-constrained industrial and medical systems - emphasizing integration (internal REF/CLK), timing determinism (no pipeline), and flexible I/O (VDRIVE).
FAQ
What is the maximum sampling rate supported by the AD7492BRU-5?
The AD7492BRU-5 supports a maximum throughput rate of 1.25 MSPS, corresponding to a conversion time of 680 ns and minimum acquisition time of 120 ns. This allows reliable sampling of input signals up to 625 kHz (Nyquist limit) while maintaining specified DC and AC performance across the full industrial temperature range (−40°C to +85°C). The AD7492BRU-5 achieves this without pipeline delay, ensuring each conversion result corresponds precisely to the sampled instant defined by the CONVST falling edge.
Does the AD7492BRU-5 require an external reference or clock source?
No, the AD7492BRU-5 does not require external reference or clock sources. It integrates a precision 2.5 V ±1.5% reference (available at REF OUT pin) and an on-chip clock oscillator. These features eliminate two external components, reduce PCB area, simplify layout, and improve system reliability. The internal clock determines conversion rate, and the internal reference sets the full-scale analog input range (0 V to 2.5 V), making the AD7492BRU-5 a self-contained solution for many 12-bit acquisition applications.
How does the VDRIVE pin function in the AD7492BRU-5?
The VDRIVE pin on the AD7492BRU-5 supplies power to the digital I/O buffer circuitry and sets logic threshold levels (VINH = VDRIVE × 0.7, VINL = VDRIVE × 0.3) and output swing (VOH = VDRIVE − 0.2 V). This allows independent configuration of digital interface voltage (2.7–5.25 V) separate from AVDD/DVDD, enabling direct interfacing with 3 V microcontrollers or FPGAs while running analog circuitry at 5 V for optimal SNR. This feature avoids level-shifter components and simplifies mixed-voltage system design.
What are the power consumption characteristics of the AD7492BRU-5 in sleep modes?
The AD7492BRU-5 offers two hardware-selectable sleep modes via the PS/FS pin: partial sleep draws ≤250 μA (typ 190 μA), retaining reference and oscillator for fast wake-up (<203 μs); full sleep draws ≤1 μA (typ 200 nA), powering down all analog circuitry for ultra-low standby power. In normal operation at 1.25 MSPS with 5 V supplies, typical power dissipation is 16 mW (2.75 mA). These modes enable adaptive power management in battery-powered or thermally constrained applications without sacrificing acquisition readiness.
Is the AD7492BRU-5 pin-compatible with other variants in the AD7492 family?
Yes, the AD7492BRU-5 shares identical pinout and package (24-lead TSSOP) with AD7492BRU and AD7492BRU-4. All variants use the same functional block diagram, interface signals (CONVST, BUSY, CS, RD, DB0–DB11), and supply domains (AVDD, DVDD, VDRIVE, AGND, DGND). The primary differences are throughput (1.25 MSPS vs 1 MSPS vs 400 kSPS) and associated timing parameters (e.g., BUSY pulse width: 680 ns for AD7492BRU-5 vs 880 ns for AD7492BRU). This allows drop-in replacement in existing layouts when higher speed is needed.
AD7492BRU-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1.25M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- Parallel
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7492BRU-5 FAQ
1.How can I place an order for AD7492BRU-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7492BRU-5 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 AD7492BRU-5 reliable?
The price and inventory of AD7492BRU-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7492BRU-5 is usually 5 days.
3.What payment methods are accepted for AD7492BRU-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7492BRU-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7492BRU-5?
AD7492BRU-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7492BRU-5 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 AD7492BRU-5?
For technical support, including AD7492BRU-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7492BRU-5 requirements.
6.How does Aetrix verify that AD7492BRU-5 is sourced from the original manufacturer or authorized distributors?
All AD7492BRU-5 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 AD7492BRU-5 meets industry standards.
7.What is the process for return or replacement of AD7492BRU-5?
All AD7492BRU-5 units undergo pre-shipment inspection (PSI). If there is an issue with AD7492BRU-5, 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 AD7492BRU-5 part is unused and in its original packaging.
Return procedure for AD7492BRU-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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