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Analog Devices Inc. AD7476ART-500RL7
- Part No.:
- AD7476ART-500RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
AD7476ART-500RL7.pdf
- Description:
- IC ADC 12BIT 1MSPS SOT-23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
AD7476ART-500RL7 from Analog Devices is a 12-bit, 1 MSPS successive-approximation ADC in a 6-lead SOT-23 package, operating from 2.35 V to 5.25 V supply, delivering 70 dB SNR at 100 kHz input and 3.6 mW power at 3 V - used for high-speed data acquisition in portable medical instruments and battery-powered sensor interfaces.
For engineers reviewing the AD7476ART-500RL7 datasheet, AD7476ART-500RL7 pinout, AD7476ART-500RL7 application, or AD7476ART-500RL7 equivalent, key selection considerations include its single-supply operation, no-pipeline-delay conversion timing, SPI-compatible serial interface, internal VDD-referenced full-scale range (0 V to VDD), and guaranteed no-missed-codes performance.
Technical Context
The AD7476ART-500RL7 implements a standard successive-approximation register (SAR) architecture with integrated track-and-hold, sampling on the falling edge of CS and completing conversion in exactly 16 SCLK cycles. It uses VDD as its reference source, eliminating external reference components while enabling analog input range scaling from 0 V to VDD.
Its digital interface is fully SPI-/QSPI-/MICROWIRE-/DSP-compatible, with SDATA outputting MSB-first serial data preceded by four leading zeros and followed by 12-bit conversion result. The device supports flexible throughput control via SCLK frequency and includes a standby mode drawing ≤1 μA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonic transfer function and no missed codes across full temperature range. |
| Throughput Rate | 1 MSPS maximum - enables real-time sampling of signals up to 500 kHz Nyquist bandwidth. |
| SNR @ 100 kHz | 70 dB minimum - supports accurate digitization of medium-bandwidth sensor and communication signals. |
| Supply Voltage | 2.35 V to 5.25 V - compatible with Li-ion, 3.3 V, and 5 V system rails without level-shifting. |
| Power Dissipation | 3.6 mW at 3 V / 1 MSPS - enables continuous high-speed acquisition in energy-constrained portable systems. |
| Aperture Jitter | 30 ps typical - limits sampling uncertainty to <0.02 LSB at 100 kHz input, preserving dynamic accuracy. |
| INL / DNL | ±1.5 LSB max / −0.9/+1.5 LSB max - ensures linearity compliance for precision measurement applications. |
Pinout & Package
AD7476ART-500RL7 is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178AA), with 0.95 mm pitch, 2.9 mm × 1.6 mm footprint, and thermal resistance θJA = 230°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power Supply Input | Single 2.35–5.25 V rail powers analog core, reference, and digital interface; also serves as ADC reference voltage source. |
| GND (Pin 2) | Analog Ground Reference | Common return for analog input, internal track-and-hold, and reference circuitry - must be low-impedance and separated from digital ground. |
| VIN (Pin 3) | Analog Input Channel | Single-ended input with 0 V to VDD range, 30 pF input capacitance, and ±1 μA leakage - requires external RC anti-aliasing filter for full performance. |
| SCLK (Pin 4) | Serial Clock Input | Controls conversion timing and data clocking; supports up to 20 MHz (A version); determines throughput rate directly (tCONVERT = 16 × tSCLK). |
| SDATA (Pin 5) | Serial Data Output | Three-state CMOS output delivering 12-bit result MSB-first, prefixed by four zeros; data valid on falling SCLK edge. |
| CS (Pin 6) | Chip Select / Conversion Start | Active-low signal initiating sample-and-hold on falling edge and framing serial data transfer - enables precise timing control without pipeline delay. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Conversion completes in fixed 16-clock cycle; sampling instant precisely controlled by CS falling edge - eliminates latency uncertainty in closed-loop systems. |
| VDD-referenced input range | Full-scale analog input spans 0 V to VDD - simplifies signal conditioning and removes need for external reference or level-shifting circuitry. |
| Flexible power management | Standby current ≤1 μA and full power-down mode reduce average power in burst-sampling applications - extends battery life in portable instrumentation. |
| High-speed serial interface | Native SPI/QSPI/MICROWIRE compatibility enables direct connection to ARM Cortex-M, DSP, or FPGA without glue logic or protocol translation. |
| Wide input bandwidth | 6.5 MHz full-power bandwidth supports accurate digitization of fast transients and RF-adjacent baseband signals in optical sensor front-ends. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous ECG waveform capture in handheld diagnostic devices powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: 12-bit SAR ADC digitizing analog front-end output at 1 MSPS with precise sampling triggered by microcontroller CS signal. Use Value: 70 dB SNR preserves clinical-grade signal fidelity; 3.6 mW power at 3 V enables >24-hour runtime on 500 mAh battery. | Use Scenario: Environmental parameter monitoring (temperature, humidity, light) in remote field nodes with intermittent wireless transmission. IC Role / Device Role / Timing Role: Low-power ADC acquiring synchronized multi-channel sensor data during brief wake-up intervals. Use Value: Standby current ≤1 μA minimizes quiescent drain; VDD-referenced input eliminates external reference, reducing BOM count and PCB area. |
| Optical Sensor Interfaces | Industrial Handheld Testers |
Use Scenario: High-bandwidth photodiode signal conditioning in laser distance meters and spectrophotometers. IC Role / Device Role / Timing Role: Digitizing fast-rising optical pulses with 30 ps aperture jitter and 6.5 MHz full-power bandwidth. Use Value: Aperture uncertainty contributes <0.02 LSB error at 100 kHz - maintains resolution for sub-millimeter distance calculations. | Use Scenario: Portable multimeter or oscilloscope probe front-end requiring compact, high-fidelity analog-to-digital conversion. IC Role / Device Role / Timing Role: Precision 12-bit ADC interfacing directly to microcontroller SPI port with no intermediate buffers or level shifters. Use Value: 6-lead SOT-23 footprint (2.9 × 1.6 mm) enables ultra-compact PCB layout; guaranteed no-missed-codes ensures measurement repeatability across temperature. |
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 |
|---|---|---|---|
| ADS7822IDR | 12-bit, 200 kSPS, 2.7–5.25 V, SPI interface, 3.5 mW at 3 V - slower throughput, lower power, no VDD reference (external ref required). | Lower sampling rate suits DC/low-frequency sensor monitoring; lacks internal reference, increasing BOM and layout complexity. | Select when power budget is tighter than speed requirement and external reference is already present. |
| MAX1116EUT+T | 12-bit, 1 MSPS, 2.7–3.6 V only, SPI interface, 5.4 mW at 3 V - narrower supply range, higher power, same VDD reference architecture. | Not suitable for 5 V systems or wide-input-voltage industrial designs; higher IDD limits battery life in portable use. | Select only for 3.3 V-only designs where MAXIM's qualification and long-term availability are prioritized. |
Compared with ADS7822IDR and MAX1116EUT+T, AD7476ART-500RL7 uniquely balances 1 MSPS speed, 2.35–5.25 V operation, VDD-referenced simplicity, and sub-4 mW power - making it optimal for space- and energy-constrained mixed-voltage portable instrumentation.
Availability
AD7476ART-500RL7 is available at Aetrix Electronics and suitable for battery-powered medical instruments, portable data loggers, optical sensor interfaces, and industrial handheld testers requiring stable component supply and long-term production continuity.
Supply support for AD7476ART-500RL7 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 AD7476ART-500RL7 belongs to the AD7476/AD7477/AD7478 family - designed specifically for ultra-compact, low-power, high-speed data acquisition in portable and energy-sensitive systems.
FAQ
What is the maximum sampling rate supported by the AD7476ART-500RL7?
The AD7476ART-500RL7 supports a maximum throughput rate of 1 MSPS under A-version conditions (VDD = 2.7–5.25 V, fSCLK = 20 MHz). This is achieved with a fixed 16-clock conversion cycle, so actual rate depends on SCLK frequency. At 20 MHz SCLK, conversion time is 800 ns, enabling full 1 MSPS operation. The AD7476ART-500RL7 datasheet specifies this as the absolute maximum sustained rate with guaranteed AC performance.
Does the AD7476ART-500RL7 require an external voltage reference?
No, the AD7476ART-500RL7 does not require an external voltage reference. It uses the VDD supply as its internal reference source, establishing a full-scale input range of 0 V to VDD. This eliminates external reference components, reduces BOM cost and PCB area, and simplifies design - though it means analog input range tracks VDD variations, requiring stable supply regulation for precision applications.
What are the logic voltage levels compatible with the AD7476ART-500RL7 digital interface?
The AD7476ART-500RL7 digital inputs (CS, SCLK) accept logic-high voltages ≥2.4 V (min) across full VDD range, and ≥1.8 V (min) when VDD = 2.35 V. Logic-low is ≤0.4 V (max) at VDD = 3 V and ≤0.8 V (max) at VDD = 5 V. Outputs (SDATA) swing from VDD − 0.2 V (min) high to 0.4 V (max) low, supporting direct interfacing with 3.3 V and 5 V microcontrollers without level shifters.
How does the AD7476ART-500RL7 handle power-down states, and what is the recovery time?
The AD7476ART-500RL7 enters full power-down mode when CS remains high and SCLK is inactive, drawing ≤1 μA. Power-up time from full power-down is 1 μs typical, as specified in the timing table. During this interval, the internal track-and-hold and reference circuits stabilize - no additional delay is needed before issuing the first CS pulse, and the first conversion after wake-up meets all AC specifications.
Is the AD7476ART-500RL7 pin-compatible with other members of the AD7476/AD7477/AD7478 family?
Yes, the AD7476ART-500RL7 shares identical 6-lead SOT-23 pinout, interface protocol, and supply requirements with AD7477ART-500RL7 and AD7478ART-500RL7. All three variants use the same VDD-referenced input range, SPI-compatible timing, and CS/SCLK/SDATA/VIN/GND/VDD pin assignments. However, resolution (12/10/8-bit), dynamic performance (SNR, THD), and DC accuracy differ - firmware must be adapted to process correct bit-length data streams.
AD7476ART-500RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- SPI, DSP
- 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:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7476ART-500RL7 FAQ
1.How can I place an order for AD7476ART-500RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7476ART-500RL7 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 AD7476ART-500RL7 reliable?
The price and inventory of AD7476ART-500RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7476ART-500RL7 is usually 5 days.
3.What payment methods are accepted for AD7476ART-500RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7476ART-500RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7476ART-500RL7?
AD7476ART-500RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7476ART-500RL7 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 AD7476ART-500RL7?
For technical support, including AD7476ART-500RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7476ART-500RL7 requirements.
6.How does Aetrix verify that AD7476ART-500RL7 is sourced from the original manufacturer or authorized distributors?
All AD7476ART-500RL7 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 AD7476ART-500RL7 meets industry standards.
7.What is the process for return or replacement of AD7476ART-500RL7?
All AD7476ART-500RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7476ART-500RL7, 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 AD7476ART-500RL7 part is unused and in its original packaging.
Return procedure for AD7476ART-500RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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