AD7476AAKSZ-REEL - 12-bit 1MSPS SAR ADC SC-70 | ADI
MPN: AD7476AAKSZ-REEL ✓ Hoạt độngAD7476AAKSZ-REEL Tóm tắt
An ADC is a data converter that transforms a continuous analog voltage into a discrete digital code. SAR (Successive Approximation Register) ADCs use a binary-search algorithm combined with an internal DAC to resolve each conversion in a fixed number of clock cycles, balancing speed, accuracy, and power efficiency. Within the converter hierarchy, this places the AD7476A in the precision, low-power, successive-approximation sub-family, well-suited for battery-powered and space-constrained instrumentation.
Key features of the AD7476A include 12-bit resolution, 1 MSPS throughput, a wide 2.35 V to 5.25 V single-supply input range, low power consumption, and a small 6-lead SC-70 outline. The -REEL suffix denotes tape-and-reel packaging for high-speed pick-and-place assembly. The part shares pinout with the 10-bit AD7477A and 8-bit AD7478A, allowing designers to migrate resolution by simply changing the device.
Typical applications include portable and battery-powered systems, instrumentation, data acquisition front-ends, optical sensor front-ends, and general-purpose analog monitoring in industrial, medical, and consumer designs. The SC-70 footprint makes it attractive where PCB real estate is at a premium.
When designing with this device, provide adequate decoupling near the supply pin and ensure the analog input is bandwidth-limited to avoid aliasing. The wide supply range simplifies integration into both 3.3 V and 5 V systems.
This page synthesizes distributor pricing, verified pin-compatible alternatives, and practical design notes curated for engineers — beyond what is found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho AD7476AAKSZ-REEL — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AD7476AAKSZ-REEL (cùng hình factor và footprint) — khác nhau ở Architecture, Resolution, Data Interface, Input Type, Operating Temperature.
AD7476AAKSZ-REEL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7477AAKSZ-REEL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7478AAKSZ-REEL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7476AAKSZ-500RL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7476AAKS-500RL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7476AAKSZ-REEL Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Number of Channels | 1 |
| Converter Type | SAR (Successive Approximation Register) |
| Throughput Rate | 1 MSPS |
| Supply Voltage Range | 2.35 V to 5.25 V (single supply) |
| Input Type | Single-ended analog input |
| Hộp | SC-70-6 (6-lead) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (REEL) |
| Architecture | Charge-redistribution SAR with internal track-and-hold |
| Trạng thái RoHS | Compliant |
Cấu hình chân AD7476AAKSZ-REEL
| Chân 1 | GND — Ground reference for analog and digital sections |
| Chân 2 | VDD — Power supply input (2.35 V to 5.25 V) |
| Chân 3 | CS — Chip select input (active low) for serial interface |
| Chân 4 | SDATA — Serial data output |
| Chân 5 | SCLK — Serial clock input |
| Chân 6 | AIN — Analog input (single-ended) |
Ứng dụng tiêu biểu
AD7476AAKSZ-REEL phù hợp cho 6 Áp dụngs: Portable Battery-Powered Data Acquisition, Industrial Process Monitoring, Optical Sensor Front-End, Medical Patient Monitoring, Automotive Sensor Interfaces, General-Purpose Test & Measurement.
Portable Battery-Powered Data Acquisition
The AD7476AAKSZ-REEL fits portable data acquisition because its 2.35 V to 5.25 V single-supply range directly accepts Li-ion, 3.3 V, and 5 V rails without level shifting. The 12-bit / 1 MSPS SAR core digitizes sensor voltages with adequate speed for vibration, audio-bandwidth, and general telemetry signals. Placed between the sensor signal-conditioning op-amp and the MCU ADC interface, it converts analog measurements to digital codes. The SC-70-6 package preserves board space on wearable and handheld enclosures, and unlike higher-speed pipeline ADCs, the SAR architecture yields no pipeline latency, simplifying single-shot triggering.
Được đề xuất
Industrial Process Monitoring
The AD7476AAKSZ-REEL supports industrial process monitoring where 12-bit resolution over a 0 to VDD input span is sufficient for temperature, pressure, and flow transmitters. Its 1 MSPS throughput oversamples slowly varying 4-20 mA loop signals comfortably, allowing averaging filters in firmware to push effective resolution beyond 12 bits. Placed at the output of an op-amp current loop receiver, it converts 0-5 V sensor signals to digital codes for the MCU. The SC-70-6 footprint integrates into compact DIN-rail transmitter heads where PCB area is constrained.
Được đề xuất
Optical Sensor Front-End
The AD7476AAKSZ-REEL digitizes photodiode or ambient-light sensor signals at up to 1 MSPS, fast enough for pulsed optical encoders and proximity sensors. Its 2.35 V to 5.25 V supply range supports both low-voltage LED drivers and 5 V photodiode bias rails. Placed between the transimpedance amplifier output and the MCU, it provides digital codes for ambient light, colorimeter, or smoke-detector front-ends. The SAR core's inherent single-cycle conversion avoids pipeline delay, critical for closed-loop optical control loops.
Được đề xuất
Medical Patient Monitoring
The AD7476AAKSZ-REEL suits low-power medical monitoring applications such as pulse oximeter waveform digitizers and body-temperature loggers. Its 12-bit resolution meets IEC 60601-1-4 general-purpose data acquisition thresholds, while the SC-70-6 footprint enables compact, wearable form factors. Placed after the analog front-end (current-to-voltage converter + filter), it provides digital codes for the MCU's arrhythmia or temperature algorithm. Unlike higher-power pipelined ADCs, the SAR architecture's duty-cycled operation extends battery life in portable patient monitors.
Được đề xuất
Automotive Sensor Interfaces
The AD7476AAKSZ-REEL digitizes sensor signals in non-safety automotive body electronics such as climate-control temperature sensors, seat-position encoders, and battery-management telemetry. Its 2.35 V to 5.25 V supply range accepts 12 V battery rails after regulator step-down. Placed after the sensor conditioning op-amp and anti-aliasing RC, it provides digital codes to the body control module. The SC-70-6 package integrates into space-constrained ECU modules behind dashboards and in door panels.
Được đề xuất
General-Purpose Test & Measurement
The AD7476AAKSZ-REEL supports benchtop and handheld test equipment where 12-bit resolution at 1 MSPS is sufficient for digitizing transducer outputs. Its single 2.35 V to 5.25 V supply simplifies USB-powered or 9 V battery-powered instrument designs. Placed after the input attenuator and instrumentation amplifier, it provides digital codes for the MCU's display and logging functions. The SC-70-6 package allows integration into compact meter enclosures, and the SAR architecture's lack of pipeline latency simplifies triggered measurements.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7476AAKSZ-REEL — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | AD7476AAKSZ-REEL7 | AD7477AAKSZ-REEL | AD7478AAKSZ-REEL | AD7476AAKSZ-500RL7 | AD7476AAKS-500RL7 |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | SC-70-6 | SC-70-6 | SC-70-6 | SC-70-6 | SC-70-6 | SC-70-6 |
| Resolution | 12 bits | 12 bits | 10 bits | 8 bits | 12 bits | 12 bits |
| Throughput | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS |
| Supply Voltage | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V | 2.35 V to 5.25 V |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Channels | 1 | 1 | 1 | 1 | 1 | 1 |
| Reel Quantity | 10000 (13-inch) | 1000 (7-inch) | 10000 (13-inch) | 10000 (13-inch) | 500 | 500 |
Bảo phân biệt quan trọng
- Smallest 12-bit 1 MSPS SAR ADC in SC-70-6 (vsAD7477AAKSZ-REEL)
- Wide 2.35 V to 5.25 V single-supply input (vsAD7478AAKSZ-REEL)
- Pin-compatible family migration path (vsAD7476AAKSZ-REEL7)
Ghi chú thiết kế
Decouple the VDD pin (pin 2) with a 0.1 uF ceramic capacitor placed within 3 mm of the pin, with a short, direct ground return to the GND pin. For 1 MSPS operation the supply must be able to source the peak transient current demanded by the SAR charge-redistribution DAC during each conversion. A larger 1 uF to 10 uF bulk capacitor near the supply rail improves noise immunity in mixed-signal layouts.
Keep the analog input trace (pin 6) short and routed away from the digital SCLK (pin 5) and SDATA (pin 4) lines to minimize digital-to-analog coupling. Use a ground plane reference under the SC-70-6 footprint. The compact SC-70 land pattern means that careful component placement is essential — do not run high-frequency digital lines beneath the ADC.
If the analog input source impedance exceeds the datasheet limit, add an op-amp buffer between the source and AIN. Source impedance directly affects the SAR acquisition time and can degrade AC performance at high throughput rates. Use a low-impedance RC anti-aliasing filter (typically 100 ohm + 1 nF) directly at the input pin.
Do not leave CS floating — it must be driven low to initiate a conversion. Ensure the SCLK frequency is within the datasheet's specified range; over-clocking will cause conversion errors. The reference for the SAR DAC is derived from VDD, so VDD noise directly couples into the conversion result — use a clean, well-decoupled supply.
Thông tin tuân thủ
RoHS compliance per Analog Devices product page. Not AEC-Q100 qualified — this is an industrial/consumer grade part. For automotive applications requiring AEC-Q100, review the ADI automotive-grade portfolio.
