AD4682BCPZ - 16-Bit 1MSPS Dual SAR ADC | Analog Devices
MPN： AD4682BCPZ ✓ 啟用中AD4682BCPZ 概覽
An ADC (analog-to-digital converter) is a device that converts continuous analog signals into discrete digital values for processing by digital systems. SAR ADCs use a binary search algorithm to approximate the input voltage, offering a good balance of speed, resolution, and power consumption. The AD4682 is part of the data acquisition signal chain, bridging real-world analog signals to digital processors, microcontrollers, or DSPs.
Key features include a buffered internal 2.5 V reference, with the option to use an external reference up to 3.3 V. The device supports standard control inputs for easy interfacing with microprocessors and DSPs. It also features a pseudo differential input configuration, which rejects common-mode noise and simplifies front-end design. The dual-channel simultaneous sampling capability ensures accurate phase matching between two input signals, critical for applications like motor control and power monitoring.
Technically, the AD4682 employs a charge redistribution SAR architecture with a capacitive DAC, providing excellent linearity and low noise. The device includes a track-and-hold circuit that captures the input signal at the sampling instant, ensuring accurate conversion. The internal reference buffer reduces external component count, while the SPI-compatible serial interface allows high-speed data transfer. The device is specified for operation from -40°C to +125°C, making it suitable for industrial environments.
Typical applications include motor control, power line monitoring, data acquisition systems, and industrial automation. In motor control, the simultaneous sampling of current and voltage enables precise vector control algorithms. In power monitoring, the high resolution and speed allow accurate measurement of AC waveforms. The small package and low power consumption make it ideal for portable and embedded systems.
When designing with the AD4682, ensure that the reference voltage is stable and well-decoupled. Use a low-impedance source to drive the analog inputs to avoid sampling errors. The SPI interface should be properly terminated to minimize signal integrity issues. Consider the power supply noise and use appropriate filtering to achieve the specified performance.
直接替換替代品，適用於 AD4682BCPZ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： AD4682BCPZ （相同外形與佔位） — 差異在於 Input Type, Number of Inputs, Resolution, Sampling Rate.
AD4683BCPZ
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查看資料表 →AD4682BCPZ 最大額定值與電氣特性
| 解析度 | 16 Bit |
| Number of Inputs | 2 |
| Input Type | Pseudo Differential |
| 取樣率 | 1 MSPS |
| Architecture | SAR |
| 供應電壓 | 3.0 V to 3.6 V |
| Internal Reference | 2.5 V buffered |
| External Reference Range | Up to 3.3 V |
| 介面 | SPI |
| 封裝 | 16-LFCSP (3x3 mm) |
| 工作溫度範圍 | -40°C to +125°C |
| 安裝類型 | Surface Mount |
| Number of Conversions | Simultaneous Sampling |
| RoHS 狀態 | Compliant |
AD4682BCPZ 腳位配置
| 腳位 1 | AVDD — Analog power supply |
| 腳位 2 | VIN+ — Positive analog input channel 1 |
| 腳位 3 | VIN- — Negative analog input channel 1 |
| 腳位 4 | GND — Ground |
| 腳位 5 | VIN+ — Positive analog input channel 2 |
| 腳位 6 | VIN- — Negative analog input channel 2 |
| 腳位 7 | REF — Reference voltage input/output |
| 腳位 8 | GND — Ground |
| 腳位 9 | SCLK — Serial clock input |
| 腳位 10 | SDI — Serial data input |
| 腳位 11 | SDO — Serial data output |
| 腳位 12 | CS — Chip select (active low) |
| 腳位 13 | GND — Ground |
| 腳位 14 | DVDD — Digital power supply |
| 腳位 15 | GND — Ground |
| 腳位 16 | EP — Exposed pad (thermal and ground) |
典型應用
AD4682BCPZ 適用於 6 應用s: Motor Control, Power Line Monitoring, Data Acquisition Systems, Industrial Automation, Medical Instrumentation, Test and Measurement.
Motor Control
The AD4682BCPZ's dual simultaneous sampling enables precise current and voltage measurement for vector control. With 16-bit resolution and 1 MSPS, it captures fast transients accurately. The pseudo differential inputs reject common-mode noise from motor drives, ensuring clean signals. Its small LFCSP package fits compact motor controllers, and the SPI interface simplifies connection to MCUs. The wide temperature range supports industrial motor environments.
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Power Line Monitoring
The AD4682BCPZ is ideal for power line monitoring due to its high resolution and simultaneous sampling of voltage and current. It can measure AC waveforms with 16-bit accuracy, enabling harmonic analysis and power quality assessment. The internal 2.5V reference simplifies design, while the SPI interface allows easy data transfer to a host processor. Its low power consumption is beneficial for distributed monitoring nodes.
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Data Acquisition Systems
In general-purpose data acquisition, the AD4682BCPZ provides high-speed, high-resolution conversion of analog signals. Its dual channels allow simultaneous sampling of two related signals, such as temperature and pressure. The pseudo differential input reduces noise, and the small package enables dense channel density. The SPI interface is compatible with most microcontrollers, making integration straightforward.
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Industrial Automation
The AD4682BCPZ is suitable for industrial automation applications such as process control and condition monitoring. Its wide temperature range and high reliability make it suitable for harsh environments. The simultaneous sampling capability is useful for correlating multiple sensor inputs. The internal reference reduces external component count, saving board space and cost.
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Medical Instrumentation
The AD4682BCPZ can be used in medical devices such as patient monitoring and diagnostic equipment. Its high resolution and low noise are critical for accurate biopotential measurements. The small package is suitable for portable devices. The SPI interface allows easy integration with medical-grade microcontrollers. The wide temperature range ensures reliable operation in clinical environments.
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Test and Measurement
The AD4682BCPZ is well-suited for test and measurement equipment such as oscilloscopes and data loggers. Its 1 MSPS sampling rate and 16-bit resolution allow accurate capture of fast signals. The dual simultaneous sampling enables comparison of two signals with precise timing. The internal reference and SPI interface simplify design, and the compact package is ideal for portable instruments.
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推薦產品摘要
工程參考資料，適用於 AD4682BCPZ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | AD4683BCPZ | AD7682BCPZ | AD7980BCPZ-RL7 | AD7606BSTZ | ADS8568 |
|---|---|---|---|---|---|---|
| Package | 16-LFCSP (3x3 mm) | 16-LFCSP (3x3 mm) | 20-LFCSP | 10-MSOP | 64-LQFP | 64-TQFP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Sampling Rate | 1 MSPS | 500 kSPS | 250 kSPS | 1 MSPS | 200 kSPS | 510 kSPS |
| Number of Channels | 2 | 2 | 4 | 1 | 8 | 8 |
| Input Type | Pseudo Differential | Pseudo Differential | Pseudo Differential | Single-ended | Single-ended | Single-ended |
| Internal Reference | Yes (2.5V) | Yes (2.5V) | Yes (2.5V) | No | Yes (2.5V) | Yes (2.5V) |
| Interface | SPI | SPI | SPI | SPI | Parallel/SPI | Parallel/SPI |
主要差異化特點
- Dual simultaneous sampling at 1 MSPS (對比AD7682BCPZ)
- Pseudo differential input (對比AD7980BCPZ-RL7)
- Internal reference included (對比AD7980BCPZ-RL7)
設計說明
Ensure that the AVDD and DVDD supplies are clean and well-decoupled. Use 0.1uF and 10uF capacitors close to the power pins. The reference voltage should be stable; if using the internal reference, place a 1uF decoupling capacitor on the REF pin. For external reference, ensure low output impedance and adequate drive capability.
Place the ADC close to the signal source to minimize trace length and reduce noise pickup. Use a solid ground plane and avoid routing digital signals under the analog input traces. For the exposed pad, solder it to the ground plane to improve thermal performance and reduce ground inductance.
The SPI interface should be designed with controlled impedance traces and proper termination to avoid reflections. Keep the SCLK trace short and avoid crossing analog signals. Use series resistors (e.g., 33 ohms) near the source to dampen ringing. Ensure that the CS signal is clean and glitch-free to prevent spurious conversions.
合規資訊
RoHS compliant per Analog Devices product page. Other compliance data not specified in the provided data.