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Analog Devices Inc. AD7472ARU-REEL
- Part No.:
- AD7472ARU-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7472ARU-REEL.pdf
- Description:
- IC ADC 12BIT SAR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,143
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Product details
Overview
AD7472ARU-REEL from Analog Devices is a 12-bit, 1.5 MSPS high-speed successive approximation ADC with parallel interface, operating from a single 2.7 V to 5.25 V supply and consuming only 3.54 mW typical at 3 V/1.2 MSPS. It features a wide 20 MHz full-power bandwidth, 70 dB typical SNR at 500 kHz input, and external 2.5 V reference support - used in precision data acquisition for industrial process control sensors and real-time motor feedback systems.
For engineers reviewing the AD7472ARU-REEL datasheet, AD7472ARU-REEL pinout, AD7472ARU-REEL application, or AD7472ARU-REEL equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior (e.g., 531.66 ns CONVST-to-BUSY delay at 26 MHz), confirmed low-power sleep mode (124 µA avg at 100 kSPS), and validated alternatives for 12-bit parallel ADC replacement.
Technical Context
The AD7472ARU-REEL implements a standard successive approximation register (SAR) architecture with no pipeline delays, enabling deterministic sampling control via the falling edge of CONVST and precise conversion completion signaling via BUSY. Its track-and-hold amplifier supports >1 MHz input frequencies and achieves 5 ns aperture delay with 15 ps aperture jitter.
Conversion is clocked externally (CLK IN), requiring 14 cycles for full 12-bit resolution; throughput scales linearly with clock frequency (1.5 MSPS max at 26 MHz/5 V). Output drivers are powered by independent VDRIVE (2.7–5.25 V), allowing AVDD/DVDD to run at 5 V for analog performance while interfacing to 3 V logic buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output levels for high-fidelity digitization of sensor or feedback signals. |
| Throughput Rate | 1.5 MSPS maximum at 5 V/26 MHz - enables real-time capture of fast transients in motor control or power monitoring. |
| SNR | 70 dB typical at 500 kHz input - ensures clean signal reconstruction in noisy industrial environments. |
| Power Dissipation | 3.54 mW typical at 3 V/1.2 MSPS - reduces thermal load and extends battery life in portable instrumentation. |
| Integral Nonlinearity | ±1 LSB max (B version) - guarantees monotonicity and ≤0.024% full-scale error for calibration-critical applications. |
| Aperture Jitter | 15 ps typical - limits sampling uncertainty to <0.03° phase error at 100 kHz, preserving signal integrity. |
| Sleep Current | 124 µA average at 3 V/100 kSPS - enables ultra-low-power wake-on-event operation in energy-constrained systems. |
Pinout & Package
AD7472ARU-REEL is housed in a 24-lead TSSOP package (RU-24), with exposed pad for thermal enhancement and 0.65 mm lead pitch. Pin layout follows industry-standard SOIC/TSSOP numbering but includes dedicated analog/digital ground separation and independent VDRIVE for level-shifting outputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Conversion Start Input | Falling-edge-triggered command initiates track-to-hold transition and starts 14-cycle SAR conversion; pulse width ≥10 ns. |
| BUSY | Conversion Status Output | Active-high open-drain signal remains high for exactly 531.66 ns (at 26 MHz) then falls to indicate result availability. |
| CS / RD | Parallel Data Access Control | Interchangeable active-low inputs; both must fall to place 12-bit result (DB0–DB11) on bus - supports direct microprocessor bus interface. |
| VIN | Analog Input Channel | Single-ended input referenced to AGND, 0 V to REF IN range (2.5 V ±1%), 33 pF input capacitance. |
| REF IN | External Reference Input | Accepts 2.5 V ±1% precision reference; determines full-scale range and directly impacts gain accuracy and SNR. |
| VDRIVE | Digital Output Driver Supply | Independent 2.7–5.25 V rail sets VOH = VDRIVE – 0.2 V, enabling 5 V analog core + 3 V logic compatibility. |
| AVDD / DVDD | Analog & Digital Supplies | Must be within 0.3 V of each other; decoupled separately to AGND/DGND to minimize noise coupling into SAR core. |
| AGND / DGND | Analog & Digital Grounds | Separate pins require star grounding or low-impedance connection; voltage difference limited to ±0.3 V to prevent offset errors. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture provides deterministic, single-shot conversion with no latency stacking - essential for closed-loop control timing. |
| Flexible power/throughput management | Externally clocked conversion allows dynamic scaling: reducing fCLK from 26 MHz to 10 MHz cuts power by ~40% while maintaining linearity. |
| Auto-sleep mode | Automatic entry into 1 µA sleep state after conversion completes when CONVST remains low - eliminates software overhead for power gating. |
| Independent VDRIVE | Enables mixed-voltage system design: AVDD/DVDD at 5 V maximizes SNR, while VDRIVE at 3 V safely drives 3.3 V FPGA or MCU I/O banks. |
| Guaranteed no missed codes | Specified for 12 bits (B version) - ensures monotonic transfer function across full temperature range (–40°C to +85°C). |
Applications
| Industrial Process Monitoring | Motor Phase Current Sensing |
|---|---|
|
Use Scenario: Continuous digitization of 4–20 mA loop outputs and RTD/thermocouple signals in PLC analog input modules. IC Role / Device Role / Timing Role: Primary 12-bit ADC capturing sensor data at 1 MSPS with deterministic CONVST-triggered sampling synchronized to PLC scan cycle. Use Value: 70 dB SNR and ±1 LSB INL ensure <0.1% measurement accuracy over temperature, meeting IEC 61000-4 immunity requirements. |
Use Scenario: Real-time sampling of shunt-based current waveforms in three-phase inverter legs for field-oriented control (FOC). IC Role / Device Role / Timing Role: High-speed parallel ADC providing 12-bit samples every 667 ns (1.5 MSPS) with sub-ns aperture jitter to preserve current vector fidelity. Use Value: 20 MHz full-power bandwidth and 5 ns aperture delay enable accurate capture of fast-switching edge artifacts without aliasing. |
| Portable Test Equipment | Energy Metering Front-End |
|
Use Scenario: Battery-powered handheld oscilloscopes and waveform analyzers requiring high resolution and low standby power. IC Role / Device Role / Timing Role: Main acquisition ADC operating in auto-sleep mode between triggers, waking on CONVST to perform burst sampling. Use Value: 124 µA average current at 100 kSPS extends runtime >10× versus continuous-conversion alternatives, with no firmware sleep-state management. |
Use Scenario: Polyphase electricity meter front-end digitizing voltage and current channels simultaneously for metrology-grade kWh calculation. IC Role / Device Role / Timing Role: Precision ADC paired with external 2.5 V reference and anti-alias filter, delivering calibrated 12-bit samples at 1.2 MSPS for harmonic analysis. Use Value: ±1 LSB INL and 70 dB SNR meet ANSI C12.20 Class 0.2 accuracy requirements for revenue-grade metering up to 50th harmonic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit parallel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7472BRU-REEL | B-grade version with ±1 LSB INL (vs. ±2 LSB for A-grade AD7472ARU-REEL); same RU-24 TSSOP package and pinout. | Required where guaranteed 12-bit monotonicity and no-missed-codes specification is mandatory across full temperature range. | Select AD7472BRU-REEL if metrology or safety-critical applications demand tighter DC accuracy specs. |
| ADS7822U | 12-bit, 200 kSPS serial SPI ADC (vs. 1.5 MSPS parallel); lower power (1.2 mW at 5 V), no external reference required. | Suitable for space-constrained designs where board area or microcontroller SPI resources outweigh need for parallel bus speed. | Choose ADS7822U when system-level cost, layout simplicity, or integration with existing SPI infrastructure outweighs throughput requirement. |
Compared with AD7472ARU-REEL, AD7472BRU-REEL offers superior DC linearity for calibration-sensitive use cases, while ADS7822U trades raw speed and parallel interface for compactness and integrated reference - making the choice dependent on whether system priority is real-time determinism or footprint/power efficiency.
Availability
AD7472ARU-REEL is available at Aetrix Electronics and suitable for industrial process monitoring, motor phase current sensing, portable test equipment, and energy metering front-end applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7472ARU-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, with design centers worldwide and ISO 9001-certified manufacturing.
The AD7472ARU-REEL belongs to Analog Devices' precision SAR ADC product line, engineered for high-speed, low-power, and high-accuracy data acquisition in industrial, instrumentation, and motor control systems where deterministic timing and DC integrity are critical.
FAQ
What is the maximum clock frequency supported by AD7472ARU-REEL?
The AD7472ARU-REEL supports up to 26 MHz CLK IN at 5 V and 20 MHz at 3 V, enabling its rated 1.5 MSPS throughput. Exceeding these frequencies violates timing specifications and may cause conversion errors or BUSY timing violations. The part enters three-state on CLK IN during idle periods to reduce noise coupling.
Does AD7472ARU-REEL require an external reference voltage?
Yes, AD7472ARU-REEL requires an external 2.5 V ±1% reference applied to the REF IN pin. It does not include an internal reference. Using a precision low-noise reference such as the ADR431 improves SNR by up to 2 dB and ensures gain error remains within ±2 LSB over temperature.
How does the auto-sleep mode function in AD7472ARU-REEL?
In auto-sleep mode, AD7472ARU-REEL automatically enters a 1 µA standby state after BUSY goes low - provided CONVST remains low. The next rising edge of CONVST wakes the device in ≤1 µs. This eliminates software polling and reduces average power to 124 µA at 100 kSPS with 3 V supplies.
Can AD7472ARU-REEL interface directly with a 3.3 V microcontroller parallel bus?
Yes - by setting VDRIVE = 3.3 V while running AVDD/DVDD at 5 V, AD7472ARU-REEL outputs meet 3.3 V logic thresholds (VOH ≥ 3.1 V, VOL ≤ 0.4 V). This preserves analog performance while ensuring safe, rail-to-rail compatibility with 3.3 V MCU data buses without level shifters.
What is the guaranteed no-missed-codes specification for AD7472ARU-REEL?
AD7472ARU-REEL (A-grade) guarantees no missed codes to 11 bits. For full 12-bit monotonicity, the B-grade variant AD7472BRU-REEL is specified with guaranteed no missed codes to 12 bits - verified across –40°C to +85°C and documented in its ordering guide and datasheet revision B.
AD7472ARU-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:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1.5M
- 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:
- External
- 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:
- -
AD7472ARU-REEL FAQ
1.How can I place an order for AD7472ARU-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7472ARU-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 AD7472ARU-REEL reliable?
The price and inventory of AD7472ARU-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7472ARU-REEL is usually 5 days.
3.What payment methods are accepted for AD7472ARU-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7472ARU-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7472ARU-REEL?
AD7472ARU-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7472ARU-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 AD7472ARU-REEL?
For technical support, including AD7472ARU-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7472ARU-REEL requirements.
6.How does Aetrix verify that AD7472ARU-REEL is sourced from the original manufacturer or authorized distributors?
All AD7472ARU-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 AD7472ARU-REEL meets industry standards.
7.What is the process for return or replacement of AD7472ARU-REEL?
All AD7472ARU-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7472ARU-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 AD7472ARU-REEL part is unused and in its original packaging.
Return procedure for AD7472ARU-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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