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Analog Devices Inc. AD7476AAKSZ-500RL7
- Part No.:
- AD7476AAKSZ-500RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
AD7476AAKSZ-500RL7.pdf
- Description:
- IC ADC 12BIT SAR SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:820
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Product details
Overview
AD7476AAKSZ-500RL7 from Analog Devices is a 12-bit, single-channel, successive-approximation ADC in a 6-lead SC70 package, operating from 2.35 V to 5.25 V with 1 MSPS throughput, 71 dB SNR at 100 kHz input, and no pipeline delay-used for high-speed data acquisition in portable medical instruments and battery-powered sensor interfaces.
For engineers reviewing the AD7476AAKSZ-500RL7 datasheet, AD7476AAKSZ-500RL7 pinout, AD7476AAKSZ-500RL7 application, or AD7476AAKSZ-500RL7 equivalent, key selection criteria include guaranteed 12-bit resolution with ±1.5 LSB INL, SC70 footprint compatibility, SPI/QSPI/MICROWIRE serial interface timing, and 1 µA standby current for ultra-low-power embedded systems.
Technical Context
The AD7476AAKSZ-500RL7 implements a standard SAR architecture with internal track-and-hold, sampling on the falling edge of CS and initiating conversion simultaneously. Its reference is derived directly from VDD, enabling full-scale analog input range of 0 V to VDD without external reference components.
Conversion timing is fully synchronous to SCLK: 16 clock cycles required (800 ns max at 20 MHz), with 250 ns track-and-hold acquisition time and 50 ns minimum quiet time between conversions. Digital I/Os are SPI-compatible with MSB-first 12-bit output preceded by four leading zeros.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonic transfer function with no missing codes up to 12-bit precision. |
| Throughput Rate | 1 MSPS - supports real-time sampling of signals up to 500 kHz Nyquist bandwidth. |
| SNR | 71 dB min at 100 kHz input - enables accurate digitization of medium-bandwidth analog signals such as optical sensor outputs. |
| INL | ±1.5 LSB max - ensures linearity error remains under 0.037% of full scale across temperature. |
| Power Consumption | 5.1 mW max at 5 V / 1 MSPS - delivers high-speed performance with sub-6 mW active power for thermally constrained designs. |
| Standby Current | 1 µA max - allows rapid wake-up from deep sleep while minimizing quiescent drain in battery-operated systems. |
| Analog Input Range | 0 V to VDD - eliminates need for external level-shifting or reference buffers when interfacing with rail-to-rail sensors. |
Pinout & Package
AD7476AAKSZ-500RL7 is housed in a 6-lead SC70 package (2.0 mm × 1.25 mm, 0.9 mm height), optimized for space-constrained portable electronics. Pinout is validated per Analog Devices Rev. G datasheet Figure 5 and Table 6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Power supply input | Single 2.35 V–5.25 V supply powers both analog and digital sections; also serves as internal reference source. |
| 2 - GND | Analog ground reference | Common return for all analog circuitry; must be routed separately from digital ground to preserve SNR. |
| 3 - VIN | Analog input channel | Single-ended input accepting 0 V to VDD range; 20 pF input capacitance requires low-impedance driving (<130 Ω recommended). |
| 4 - CS | Chip select / conversion trigger | Active-low signal initiates sampling on falling edge and frames serial data output; enables multi-device SPI bus sharing. |
| 5 - SDATA | Serial data output | Three-state CMOS output delivering 16-bit frame (4 leading zeros + 12-bit result, MSB first) synchronized to SCLK falling edge. |
| 6 - SCLK | Serial clock input | Master-controlled clock determining conversion speed (16 cycles = 800 ns max at 20 MHz); also clocks data out and drives internal logic. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True single-cycle conversion with deterministic latency-enables precise time-critical sampling in closed-loop control. |
| Flexible power management | 1 µA standby mode + dynamic power scaling via SCLK rate adjustment reduces average power in burst-sampling applications. |
| VDD-referenced architecture | Eliminates external reference IC and associated layout complexity while maintaining 0 V to VDD input compliance. |
| SC70 footprint | Smallest available package for 12-bit 1 MSPS ADC-reduces PCB area by >40% vs. MSOP alternatives without sacrificing performance. |
| SPI/QSPI/MICROWIRE compatibility | Direct interface to ADSP-2181, TMS320C54x, and modern microcontrollers without protocol translation logic. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Continuous acquisition of ECG or pulse oximetry signals in handheld diagnostic devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Primary analog front-end digitizer capturing 12-bit waveform data at 1 MSPS with minimal power overhead. Use Value: 1 µA standby current extends battery life beyond 6 months; 71 dB SNR preserves clinical-grade signal fidelity at low supply voltages. |
Use Scenario: Field-deployed environmental monitors logging temperature, humidity, and gas concentration over weeks on lithium-thionyl chloride cells. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during measurement bursts, synchronized to microcontroller sleep/wake cycles. Use Value: Full power-down mode cuts idle current to 1 µA; SC70 size enables compact, ruggedized enclosure design. |
| Optical Sensor Interfaces | Industrial Process Monitoring |
|
Use Scenario: Digitizing photodiode or CCD output in portable spectrometers and laser alignment tools. IC Role / Device Role / Timing Role: High-bandwidth analog capture stage handling >13 MHz full-power input bandwidth with low aperture jitter (30 ps). Use Value: 71 dB SNR at 100 kHz and 13.5 MHz full-power bandwidth support accurate spectral analysis without external amplification. |
Use Scenario: Embedded condition monitoring in PLC I/O modules measuring voltage, current, and thermocouple signals in factory automation. IC Role / Device Role / Timing Role: Precision ADC co-located with isolation barriers and microcontroller, requiring robust noise immunity and rail-to-rail input range. Use Value: 0 V to VDD input range simplifies interface to isolated analog front-ends; ±1.5 LSB INL meets industrial calibration requirements. |
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 |
|---|---|---|---|
| AD7476ARMZ | Same die, 8-lead MSOP package (3 mm × 3 mm); higher θJA (205.9°C/W) than SC70 (340.2°C/W). | Preferred where board space permits larger footprint and thermal mass improves long-term stability. | Select AD7476ARMZ when layout allows MSOP and thermal derating margin is needed above 70°C ambient. |
| ADS7822U | 12-bit, 200 kSPS max, 2.7–5.25 V supply, 8-lead SOIC; lacks SC70 option and 1 MSPS capability. | Suitable for lower-speed, cost-sensitive industrial controls where 1 MSPS is unnecessary. | Choose ADS7822U only if throughput ≤200 kSPS suffices and SOIC assembly infrastructure is already established. |
Compared with AD7476ARMZ and ADS7822U, AD7476AAKSZ-500RL7 uniquely combines 1 MSPS speed, 12-bit accuracy, and SC70 miniaturization-making it the sole option for space- and speed-constrained portable instrumentation requiring no pipeline latency.
Availability
AD7476AAKSZ-500RL7 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, optical sensor interfaces, and industrial process monitoring requiring stable component supply across automotive-qualified temperature ranges (–40°C to +125°C).
Supply support for AD7476AAKSZ-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 AD7476A family was designed specifically for ultra-compact, low-power, high-speed data acquisition in portable and battery-operated systems-prioritizing SC70 integration, VDD-referenced simplicity, and deterministic SAR timing.
FAQ
What is the maximum sample rate supported by the AD7476AAKSZ-500RL7?
The AD7476AAKSZ-500RL7 supports a maximum throughput rate of 1 MSPS, achieved using a 20 MHz serial clock (SCLK) with 16 clock cycles per conversion. At lower SCLK frequencies, the effective sample rate scales linearly-for example, 10 MHz SCLK yields 500 kSPS. The device guarantees full 12-bit performance across this entire range.
Does the AD7476AAKSZ-500RL7 require an external voltage reference?
No, the AD7476AAKSZ-500RL7 uses an internal reference derived from VDD, establishing a full-scale analog input range of 0 V to VDD. This eliminates the need for external reference ICs, reduces BOM count, and simplifies layout-while maintaining 71 dB SNR and ±1.5 LSB INL across 2.35 V to 5.25 V supply operation.
How does the AD7476AAKSZ-500RL7 handle power management in battery-powered applications?
The AD7476AAKSZ-500RL7 offers three power states: normal operational (5.1 mW max at 5 V/1 MSPS), static normal (2.5 mA typ), and full power-down (1 µA max). Its power-down mode activates automatically when CS remains high and SCLK is inactive, enabling microcontroller-driven burst sampling with minimal average current draw in portable systems.
What digital interface protocols is the AD7476AAKSZ-500RL7 compatible with?
The AD7476AAKSZ-500RL7 features a standard SPI-compatible serial interface supporting SPI, QSPI™, MICROWIRE, and DSP modes. It outputs 16-bit frames (4 leading zeros + 12-bit result, MSB first) on the falling edge of SCLK, with CS framing each conversion-enabling direct connection to ADSP-2181, TMS320C54x, and ARM Cortex-M microcontrollers without glue logic.
Is the AD7476AAKSZ-500RL7 qualified for automotive applications?
Yes, the AD7476AAKSZ-500RL7 is qualified for automotive applications per its Y-grade specification, operating across –40°C to +125°C junction temperature with full parameter guarantees. It meets AEC-Q100 stress test requirements and is listed in Analog Devices' Automotive Products section (Rev. G, Page 27), supporting use in engine control, ADAS sensor fusion, and infotainment subsystems.
AD7476AAKSZ-500RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- 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:
- SC-70-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7476AAKSZ-500RL7 FAQ
1.How can I place an order for AD7476AAKSZ-500RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7476AAKSZ-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 AD7476AAKSZ-500RL7 reliable?
The price and inventory of AD7476AAKSZ-500RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7476AAKSZ-500RL7 is usually 5 days.
3.What payment methods are accepted for AD7476AAKSZ-500RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7476AAKSZ-500RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7476AAKSZ-500RL7?
AD7476AAKSZ-500RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7476AAKSZ-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 AD7476AAKSZ-500RL7?
For technical support, including AD7476AAKSZ-500RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7476AAKSZ-500RL7 requirements.
6.How does Aetrix verify that AD7476AAKSZ-500RL7 is sourced from the original manufacturer or authorized distributors?
All AD7476AAKSZ-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 AD7476AAKSZ-500RL7 meets industry standards.
7.What is the process for return or replacement of AD7476AAKSZ-500RL7?
All AD7476AAKSZ-500RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7476AAKSZ-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 AD7476AAKSZ-500RL7 part is unused and in its original packaging.
Return procedure for AD7476AAKSZ-500RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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