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Analog Devices Inc. AD7476BRTZ-REEL7
- Part No.:
- AD7476BRTZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
AD7476BRTZ-REEL7.pdf
- Description:
- IC ADC 12BIT SAR SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,073
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Product details
Overview
AD7476BRTZ-REEL7 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. It delivers 70 dB SNR at 100 kHz input, features no pipeline delay, and uses an internal VDD-referenced analog input range (0 V to VDD) for maximum dynamic range in space-constrained data acquisition systems.
For engineers reviewing the AD7476BRTZ-REEL7 datasheet, AD7476BRTZ-REEL7 pinout, AD7476BRTZ-REEL7 application, or AD7476BRTZ-REEL7 equivalent, this page provides verified technical context, real-world timing behavior, confirmed serial interface compatibility (SPI/QSPI/MICROWIRE/DSP), power-performance tradeoffs at 3 V and 5 V, and validated alternative options for battery-powered instrumentation and high-speed sensor interfaces.
Technical Context
The AD7476BRTZ-REEL7 implements a standard successive-approximation register (SAR) architecture with a track-and-hold amplifier supporting >6 MHz input bandwidth and 30 ps aperture jitter. Conversion is initiated on the falling edge of CS, with sampling synchronized to that edge and no latency between command and result.
It uses VDD as its reference source, eliminating external reference components while enabling full-scale input range from 0 V to VDD. Serial data output is MSB-first, framed by CS, with 16 SCLK cycles per conversion and guaranteed no missing codes across its 12-bit resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonic transfer function and no missing codes over full temperature range. |
| Throughput Rate | 1 MSPS maximum - enables real-time sampling of signals up to ~400 kHz Nyquist bandwidth. |
| SNR @ 100 kHz | 70 dB minimum - supports accurate digitization of medium-bandwidth sensor outputs (e.g., accelerometers, pressure transducers). |
| Power @ 3 V / 1 MSPS | 4.2 mW maximum - allows continuous high-speed operation in coin-cell or single-Li-ion powered devices. |
| Input Range | 0 V to VDD - eliminates level-shifting circuitry when interfacing with rail-to-rail op-amps or sensors referenced to same supply. |
| Serial Interface | SPI-/QSPI-/MICROWIRE-/DSP-compatible - ensures drop-in integration with common microcontrollers without protocol translation. |
| Aperture Jitter | 30 ps typical - limits sampling uncertainty to <0.02 LSB at 100 kHz input, preserving dynamic performance. |
Pinout & Package
AD7476BRTZ-REEL7 is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178AA), measuring 2.9 mm × 1.6 mm × 1.1 mm, optimized for high-density PCB layouts and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply input | Single 2.35 V–5.25 V supply powers analog core, reference, and digital interface; also serves as ADC reference voltage. |
| GND (Pin 2) | Analog ground reference | Common return for analog input, internal track-and-hold, and reference path; must be tied to low-noise system ground plane. |
| VIN (Pin 3) | Analog input channel | Single-ended input with 30 pF capacitance and ±1 μA leakage; accepts 0 V to VDD range without external scaling. |
| SCLK (Pin 4) | Serial clock input | Controls conversion timing and data readout; supports up to 20 MHz (A version), defines throughput rate and power consumption. |
| SDATA (Pin 5) | Serial data output | MSB-first 12-bit result preceded by four leading zeros; tri-state after conversion completes; compatible with 3-state bus sharing. |
| CS (Pin 6) | Chip select / conversion trigger | Active-low signal initiates sampling on falling edge and frames serial data; enables precise timing control without external logic. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Sampling and conversion are atomic events triggered by CS falling edge-enables deterministic timing for closed-loop control and time-critical triggers. |
| VDD-referenced conversion | Eliminates need for external reference IC or resistor divider, reducing BOM count and layout area while maintaining full-scale utilization across supply variations. |
| 1 μA shutdown current | Reduces average system power in duty-cycled applications (e.g., periodic sensor polling), extending battery life beyond 10 years in low-duty-cycle IoT nodes. |
| 6 MHz full-power bandwidth | Supports direct digitization of wideband signals (e.g., ultrasonic transducer outputs, optical pulse detection) without anti-alias filter complexity. |
| SOT-23 footprint | Enables placement adjacent to compact sensors or MCUs on 2-layer boards; compatible with standard pick-and-place and reflow processes. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Continuous acquisition of ECG or blood oxygen plethysmography waveforms in handheld diagnostic tools. IC Role / Device Role / Timing Role: Primary analog front-end digitizer, sampling at 1 MSPS with precise CS-triggered capture to align with physiological event markers. Use Value: 70 dB SNR preserves waveform fidelity for arrhythmia detection algorithms; 3.6 mW power at 3 V extends clinical-grade runtime on AAA batteries. |
Use Scenario: Multi-channel environmental monitoring (temperature, humidity, light) in remote field deployments. IC Role / Device Role / Timing Role: Low-power SAR ADC managing burst-mode sampling of multiple sensors via multiplexer, entering 1 μA shutdown between reads. Use Value: VDD-referenced input simplifies sensor signal conditioning; SOT-23 size minimizes PCB area in compact enclosure designs. |
| Industrial Motor Control Feedback | Optical Sensor Signal Digitization |
|
Use Scenario: Sampling current-sense amplifier outputs for real-time FOC (field-oriented control) in BLDC motor drives. IC Role / Device Role / Timing Role: High-speed acquisition node synchronized to PWM switching edges using CS edge triggering for minimal latency. Use Value: No pipeline delay ensures sampled value reflects true instantaneous current; 30 ps aperture jitter maintains phase accuracy under 20 kHz switching. |
Use Scenario: Converting photodiode or phototransistor outputs in laser distance meters or barcode scanners. IC Role / Device Role / Timing Role: Digitizer for fast transient optical pulses, leveraging 6.5 MHz full-power bandwidth to capture rise/fall dynamics. Use Value: 12-bit resolution resolves sub-millimeter displacement changes; SPI-compatible interface enables direct connection to FPGA-based timing engines. |
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 |
|---|---|---|---|
| ADS7822UID | 8-pin SOIC package; 1 MSPS; 12-bit; requires external reference; 2.7–5.25 V supply; 1.5 mW @ 3 V. | Larger footprint; higher layout overhead due to external reference and decoupling; better noise immunity in noisy industrial environments. | Select when board space permits larger package and system-level noise margin outweighs miniaturization benefit. |
| MAX1116EUT+T | 6-pin SOT-23; 1 MSPS; 12-bit; internal reference; 2.7–3.6 V only; 2.5 mW @ 3 V; 68 dB SNR @ 100 kHz. | Narrower supply range excludes 5 V systems; 2 dB lower SNR limits dynamic range in precision sensor applications. | Select for cost-sensitive, strictly 3 V designs where 68 dB SNR suffices and 5 V compatibility is unnecessary. |
Compared with ADS7822UID and MAX1116EUT+T, AD7476BRTZ-REEL7 uniquely combines 6-lead SOT-23 packaging, 5 V tolerance, VDD-referenced input, and 70 dB SNR-making it optimal for miniaturized, multi-supply industrial and medical systems requiring both size efficiency and signal integrity.
Availability
AD7476BRTZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered systems, portable medical instruments, and high-speed data acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for AD7476BRTZ-REEL7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7476BRTZ-REEL7 belongs to Analog Devices' micropower SAR ADC product line, engineered for ultra-compact, energy-efficient digitization in space- and power-constrained embedded systems.
FAQ
What is the maximum sampling rate supported by the AD7476BRTZ-REEL7?
The AD7476BRTZ-REEL7 supports a maximum throughput rate of 1 MSPS under specified conditions (VDD = 2.7 V to 5.25 V, fSCLK = 20 MHz). This is achieved using 16 SCLK cycles per conversion, meaning the minimum SCLK period must be ≤50 ns. At lower clock speeds or reduced supply voltages (e.g., B-version operation), the maximum rate drops to 600 kSPS.
Does the AD7476BRTZ-REEL7 require an external voltage reference?
No, the AD7476BRTZ-REEL7 uses an internal reference derived from VDD, enabling a full-scale analog input range of 0 V to VDD. This eliminates the need for external reference components, simplifying design and reducing bill-of-materials cost-though system-level accuracy remains dependent on VDD stability and noise.
How does the AD7476BRTZ-REEL7 handle power management in low-duty-cycle applications?
The AD7476BRTZ-REEL7 features a full power-down mode with ≤1 μA quiescent current when SCLK is inactive. In burst-mode systems, it can be woken via CS assertion, complete a conversion in ≤0.8 μs, and return to shutdown-enabling ultra-low average power in sensor nodes with infrequent sampling intervals.
Is the AD7476BRTZ-REEL7 compatible with standard SPI microcontrollers?
Yes, the AD7476BRTZ-REEL7 is fully SPI-, QSPI-, MICROWIRE-, and DSP-compatible. Its CS-controlled frame, SCLK-synchronized SDATA output, and MSB-first 12-bit data stream (with four leading zeros) integrate directly with common MCU SPI peripherals without additional glue logic or firmware adaptation.
What is the guaranteed DC accuracy of the AD7476BRTZ-REEL7 over temperature?
The AD7476BRTZ-REEL7 guarantees ±1.5 LSB integral nonlinearity, ±0.9/+1.5 LSB differential nonlinearity, ±1.5 LSB offset error, and ±1.5 LSB gain error over its −40°C to +85°C operating range. These specifications ensure monotonicity and predictable error bounds for calibration-sensitive applications like precision instrumentation.
AD7476BRTZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 600k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.35V ~ 5.25V
- Voltage - Supply, Digital:
- 2.35V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7476BRTZ-REEL7 FAQ
1.How can I place an order for AD7476BRTZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7476BRTZ-REEL7 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 AD7476BRTZ-REEL7 reliable?
The price and inventory of AD7476BRTZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7476BRTZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7476BRTZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7476BRTZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7476BRTZ-REEL7?
AD7476BRTZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7476BRTZ-REEL7 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 AD7476BRTZ-REEL7?
For technical support, including AD7476BRTZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7476BRTZ-REEL7 requirements.
6.How does Aetrix verify that AD7476BRTZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7476BRTZ-REEL7 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 AD7476BRTZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7476BRTZ-REEL7?
All AD7476BRTZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7476BRTZ-REEL7, 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 AD7476BRTZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7476BRTZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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