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Analog Devices Inc. AD7472YRU
- Part No.:
- AD7472YRU
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7472YRU.pdf
- Description:
- IC ADC 12BIT PARALLEL 24-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:11,894
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Product details
Overview
AD7472YRU from Analog Devices is a 12-bit, 1.2 MSPS (5 V) / 875 kSPS (3 V) high-speed successive approximation ADC in a 24-lead TSSOP package. It operates from a single 2.7 V to 5.25 V supply, features 70 dB typical SNR at 500 kHz input, and uses an external 2.5 V reference for 0 V to 2.5 V analog input range. It is designed for precision data acquisition in industrial sensor interfaces and real-time control systems.
For engineers reviewing the AD7472YRU datasheet, AD7472YRU pinout, AD7472YRU application, or AD7472YRU equivalent, key selection considerations include its Y-grade temperature range (–40°C to +125°C), parallel 12-bit output interface (DB0–DB11), sleep-mode current of 2 µA max, and flexible clock-driven throughput scaling from 875 kSPS to 1.2 MSPS.
Technical Context
The AD7472YRU implements a standard successive approximation register (SAR) architecture with a track-and-hold amplifier that supports full-power bandwidth up to 20 MHz. Conversion is initiated on the falling edge of CONVST and completes in exactly 14 CLK IN cycles, with no pipeline delay.
It uses separate analog (AVDD/AGND) and digital (DVDD/DGND) supplies with strict ±0.3 V inter-supply tolerance, and includes VDRIVE to independently set output logic high level-enabling 5 V analog core operation while interfacing to 3 V digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit-guarantees no missed codes to 11 bits, supporting precise measurement of small signal changes in industrial sensors. |
| Throughput Rate | 1.2 MSPS @ 5 V / 875 kSPS @ 3 V-determined by external clock (20 MHz @ 5 V / 14 MHz @ 3 V), enabling deterministic timing control. |
| SNR | 70 dB typ @ 500 kHz-enables accurate digitization of medium-bandwidth signals such as motor phase currents or vibration sensors. |
| Power Dissipation | 4.5 mW max @ 3 V-achieves low energy per conversion (5.1 nJ @ 875 kSPS), critical for thermally constrained embedded systems. |
| Integral Nonlinearity | ±2 LSB max-ensures monotonicity and predictable error bounds across full scale, simplifying calibration in closed-loop controllers. |
| Sleep Mode Current | 2 µA max @ 5 V-reduces standby power by >1000× vs active mode, extending battery life in intermittent-sampling applications. |
| Aperture Jitter | 15 ps typ-limits sampling uncertainty, preserving dynamic performance for signals up to 500 kHz without external jitter cleanup. |
Pinout & Package
AD7472YRU is housed in a 24-lead TSSOP (RU-24) package with 0.65 mm lead pitch and thermal impedance θJA = 115°C/W. Pin functions are validated per Analog Devices Rev. B datasheet Figure 7 (AD7472 top view) and Pin Function Descriptions (pp. 7–8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog input | Single-ended 0 V to REF IN input; high-impedance (>1 GΩ DC), 33 pF capacitance-compatible with passive RC anti-alias filtering. |
| REF IN | Reference input | Accepts 2.5 V ±1% external reference; 10/20 pF input capacitance requires local decoupling for stable conversion accuracy. |
| CONVST | Conversion start | Falling-edge-triggered; initiates track-to-hold transition and conversion; 10 ns minimum pulse width enables tight timing control. |
| BUSY | Status output | Active-high open-drain signal indicating conversion in progress; falls 531.66 ns after CONVST (26 MHz clock) to signal result readiness. |
| CS / RD | Parallel interface control | Interchangeable active-low inputs controlling three-state DB0–DB11 outputs; both may be hardwired low for continuous bus access. |
| DB0–DB11 | Data outputs | 12-bit straight binary outputs; level set by VDRIVE-not tied to DVDD-allowing independent 3 V logic interfacing while AVDD/DVDD run at 5 V. |
| VDRIVE | Digital output supply | Defines VOH = VDRIVE – 0.2 V; isolates output driver voltage from DVDD, enabling mixed-voltage system integration. |
| AGND / DGND | Analog/digital ground | Separate pins require star grounding with ≤0.3 V potential difference to minimize noise coupling into SAR core. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture delivers deterministic, single-shot conversion with exact 14-clock-cycle latency-essential for time-critical feedback loops. |
| Flexible power/throughput scaling | Throughput directly proportional to external clock frequency; reducing clock rate linearly reduces power, enabling adaptive energy management. |
| Auto-sleep mode | Automatically enters 2 µA sleep after conversion when CONVST remains low; wakes in ≤1 µs on next CONVST rising edge-ideal for burst-mode sensing. |
| Independent VDRIVE supply | Decouples output logic levels from DVDD, permitting 5 V analog section operation with 3 V FPGA/microcontroller I/O without level shifters. |
| High-temperature grade | Specified from –40°C to +125°C (Y version); validated with 20 MHz max clock @ 5 V and 14 MHz @ 3 V-suitable for under-hood automotive or industrial motor drives. |
Applications
| Industrial Motor Control | Automotive Battery Monitoring |
|---|---|
Use Scenario: Real-time sampling of phase currents and DC-link voltage in 3-phase inverters operating at 10–20 kHz PWM frequencies. IC Role / Device Role / Timing Role: 12-bit SAR ADC capturing synchronized current samples with <1 µs wake-up latency and deterministic 531.66 ns conversion completion timing. Use Value: Enables precise field-oriented control (FOC) with minimal current reconstruction error, improving torque ripple and efficiency at elevated ambient temperatures. |
Use Scenario: Periodic voltage monitoring of individual Li-ion cells in EV battery packs exposed to under-hood thermal environments. IC Role / Device Role / Timing Role: Low-power, high-accuracy ADC performing 100 kSPS burst conversions during vehicle idle states using auto-sleep mode. Use Value: Achieves <±2 LSB INL over –40°C to +125°C, ensuring cell voltage accuracy within ±1.25 mV (2.5 V ref), critical for state-of-charge estimation. |
| Programmable Logic Controller (PLC) Input Module | Test & Measurement Signal Digitizer |
Use Scenario: High-density analog input card acquiring 4–8 channels of 4–20 mA loop signals with simultaneous sampling and isolation. IC Role / Device Role / Timing Role: Parallel-output ADC interfaced to FPGA for multi-channel interleaved sampling; BUSY signal synchronizes data capture across channels. Use Value: 70 dB SNR at 500 kHz supports >60 dB dynamic range for detecting low-level fault signatures in noisy factory environments. |
Use Scenario: Portable oscilloscope front-end digitizing baseband signals up to 500 kHz with minimal external components. IC Role / Device Role / Timing Role: Standalone 12-bit ADC with external clock control, delivering 1.2 MSPS throughput and 20 MHz full-power bandwidth. Use Value: Aperture jitter of 15 ps limits effective resolution loss to <0.1 LSB at 500 kHz, preserving signal fidelity without requiring external sampling clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7472ARU | Same 12-bit SAR architecture, TSSOP-24 package, but A-grade (–40°C to +85°C) and higher max throughput (1.5 MSPS @ 5 V). | Not rated for operation above +85°C; unsuitable for under-hood or high-ambient industrial enclosures. | Select AD7472ARU only if operating temperature stays ≤+85°C and higher throughput is required. |
| ADS7822U | 12-bit SAR ADC in MSOP-8, SPI interface, 200 kSPS max, 3.3 V only, no VDRIVE pin. | Serial interface increases MCU GPIO usage and adds protocol overhead; lacks independent output drive voltage. | Choose ADS7822U only for space-constrained designs where serial interface and lower speed are acceptable trade-offs. |
Compared with AD7472ARU and ADS7822U, the AD7472YRU uniquely combines extended temperature operation (–40°C to +125°C), parallel 12-bit interface for low-latency data transfer, and VDRIVE-enabled mixed-voltage compatibility-making it optimal for thermally demanding, high-throughput industrial control nodes.
Availability
AD7472YRU is available at Aetrix Electronics and suitable for industrial motor control, automotive battery monitoring, PLC input modules, and portable test equipment requiring stable component supply across extended temperature ranges.
Supply support for AD7472YRU 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 AD7472YRU belongs to Analog Devices' precision SAR ADC product line, engineered for high-speed, low-power data acquisition in thermally demanding industrial and automotive systems where deterministic timing and wide temperature operation are critical.
FAQ
What is the maximum clock frequency supported by AD7472YRU?
The AD7472YRU supports a maximum master clock frequency of 20 MHz at 5 V and 14 MHz at 3 V, as specified for the Y-version in the Rev. B datasheet. This yields a maximum throughput of 1.2 MSPS at 5 V and 875 kSPS at 3 V. Exceeding these frequencies may cause timing violations or reduced AC performance, particularly aperture jitter and SNR degradation.
Does AD7472YRU require separate analog and digital ground planes?
Yes, AD7472YRU has dedicated AGND and DGND pins that must be held within ±0.3 V of each other-even transiently-to prevent noise coupling and ensure specified INL and SNR performance. Best practice is a single-point star ground connection near the device, with separate analog and digital ground pours routed to that point.
Can AD7472YRU operate with a 3.3 V reference instead of 2.5 V?
No-the AD7472YRU is specified only for a 2.5 V ±1% external reference applied to REF IN. Using 3.3 V violates the absolute maximum rating (REF IN to AGND ≤ AVDD + 0.3 V) and invalidates all DC and AC specifications, including offset error, gain error, and SNR. The reference must be precisely 2.5 V.
How does the auto-sleep mode function in AD7472YRU?
In auto-sleep mode, AD7472YRU automatically enters sleep (2 µA max current) when CONVST remains low after BUSY goes low. It wakes on the next rising edge of CONVST with ≤1 µs latency. This eliminates software-controlled power sequencing and enables ultra-low average power in duty-cycled sensing applications without external control logic.
Is AD7472YRU pin-compatible with AD7472ARU or AD7472BRU?
Yes-AD7472YRU shares identical pinout, footprint (RU-24 TSSOP), and electrical interface with AD7472ARU and AD7472BRU. All three use the same 24-pin arrangement, signal naming, and timing behavior. The only differences are temperature grade (Y vs A/B) and AC performance limits at high clock rates.
AD7472YRU 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):
- 1.5M
- 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 ~ 125°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7472YRU FAQ
1.How can I place an order for AD7472YRU through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7472YRU 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 AD7472YRU reliable?
The price and inventory of AD7472YRU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7472YRU is usually 5 days.
3.What payment methods are accepted for AD7472YRU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7472YRU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7472YRU?
AD7472YRU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7472YRU 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 AD7472YRU?
For technical support, including AD7472YRU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7472YRU requirements.
6.How does Aetrix verify that AD7472YRU is sourced from the original manufacturer or authorized distributors?
All AD7472YRU 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 AD7472YRU meets industry standards.
7.What is the process for return or replacement of AD7472YRU?
All AD7472YRU units undergo pre-shipment inspection (PSI). If there is an issue with AD7472YRU, 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 AD7472YRU part is unused and in its original packaging.
Return procedure for AD7472YRU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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