AD7693BCPZ - 16-Bit 500kSPS PulSAR ADC | Analog Devices
MPN： AD7693BCPZ ✓ 啟用中AD7693BCPZ 概覽
An ADC (analog-to-digital converter) is an electronic component that converts continuous analog signals into discrete digital values. The AD7693 is a SAR ADC, which uses a capacitive digital-to-analog converter and a comparator to perform binary search conversion. SAR ADCs are known for their high speed, low power, and excellent accuracy, making them ideal for data acquisition systems, medical instrumentation, and industrial process control. The AD7693 sits within the hierarchy: SAR ADC -> ADC -> data converter -> mixed-signal IC -> semiconductor.
Key features of the AD7693BCPZ include 16-bit resolution with no missing codes, a throughput of 500 kSPS, and excellent linearity with INL/DNL of ±0.25 LSB typical and ±0.5 LSB maximum (±8 ppm of FSR). It achieves a dynamic range of 96.5 dB and a SINAD of 96.5 dB at 1 kHz input, ensuring high-fidelity signal acquisition. The device supports an input voltage range of 4.5V to 5V and operates over the industrial temperature range of -40°C to +85°C.
Technically, the AD7693 uses a charge redistribution architecture with a precision reference input. It features a separate VIO supply for logic interface, allowing compatibility with 1.8V, 2.5V, 3V, or 5V logic. The SPI interface supports daisy-chaining multiple ADCs on a single 3-wire bus and provides an optional busy indicator. The device also includes a power-down mode for reduced power consumption between conversions.
Typical applications include high-speed data acquisition systems, medical imaging, industrial process control, and battery-powered instrumentation. Its combination of high resolution, speed, and low power makes it ideal for portable and embedded systems where accuracy and efficiency are critical.
When designing with the AD7693, ensure a clean, low-impedance reference voltage and adequate decoupling on the power supply pins. The differential input should be driven with a low-impedance source to maintain specified performance. Proper PCB layout, including a solid ground plane and short trace lengths, is essential for achieving the best SNR and linearity.
直接替換替代品，適用於 AD7693BCPZ — 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： AD7693BCPZ （相同外形與佔位） — 差異在於 Package, Resolution, Sampling Rate, Supply Voltage.
AD7690BCPZRL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD7693BCPZ 最大額定值與電氣特性
| 解析度 | 16 bits |
| 取樣率 | 500 kSPS |
| Input Type | Differential |
| Number of Inputs | 1 |
| Architecture | SAR |
| INL (Max) | ±0.5 LSB (±8 ppm of FSR) |
| DNL (Max) | ±0.5 LSB |
| Dynamic Range | 96.5 dB |
| SINAD (at 1 kHz) | 96.5 dB |
| 供應電壓 | 4.5 V to 5 V |
| Logic Supply Voltage (VIO) | 1.8 V to 5 V |
| 工作溫度 | -40°C to +85°C |
| 封裝 | 10-Lead LFCSP-WD (3x3 mm) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
AD7693BCPZ 腳位配置
| 腳位 1 | VDD — Power supply, 4.5V to 5V |
| 腳位 2 | GND — Ground |
| 腳位 3 | REF — Reference voltage input |
| 腳位 4 | IN+ — Positive differential input |
| 腳位 5 | IN- — Negative differential input |
| 腳位 6 | SCK — Serial clock input |
| 腳位 7 | SDI — Serial data input (for daisy-chain) |
| 腳位 8 | SDO — Serial data output |
| 腳位 9 | CNV — Convert input, initiates conversion |
| 腳位 10 | VIO — Logic supply voltage, 1.8V to 5V |
典型應用
AD7693BCPZ 適用於 6 應用s: High-Speed Data Acquisition, Medical Instrumentation, Industrial Process Control, Portable Instrumentation, Test and Measurement, Audio and Vibration Analysis.
High-Speed Data Acquisition
The AD7693BCPZ's 500 kSPS sampling rate and 16-bit resolution make it ideal for high-speed data acquisition systems. Its differential input rejects common-mode noise, ensuring accurate measurement of small signals in industrial and test equipment. The SPI interface allows easy integration with microcontrollers and DSPs, and the small LFCSP package saves board space. With 96.5 dB dynamic range, it captures fine details in transient signals, making it suitable for vibration analysis, power monitoring, and high-speed instrumentation.
推薦
Medical Instrumentation
In medical devices such as patient monitors and diagnostic equipment, the AD7693BCPZ provides high-resolution conversion of biosignals with low noise. Its 96.5 dB SINAD ensures accurate representation of ECG, EEG, and other physiological signals. The device's low power consumption and small footprint are advantageous for portable and wearable medical devices. The differential input helps reject interference from other electronic systems, improving signal integrity in clinical environments.
推薦
Industrial Process Control
The AD7693BCPZ is well-suited for industrial process control systems that require accurate monitoring of analog signals from sensors. Its 16-bit resolution and ±0.5 LSB INL ensure precise measurement of temperature, pressure, and flow. The device operates over the industrial temperature range of -40°C to +85°C, making it reliable in harsh environments. The SPI interface supports daisy-chaining, allowing multiple ADCs to be connected to a single bus, simplifying system design and reducing wiring.
推薦
Portable Instrumentation
For battery-powered instruments, the AD7693BCPZ offers a balance of performance and power efficiency. Its 500 kSPS throughput allows rapid measurements while minimizing active time, and the power-down mode reduces current consumption between conversions. The small 3x3 mm LFCSP package is ideal for handheld devices. With a supply voltage of 5V, it can be powered directly from a battery or a low-dropout regulator, simplifying power design.
推薦
Test and Measurement
In test and measurement equipment such as digital multimeters and data loggers, the AD7693BCPZ provides high accuracy and speed. Its 16-bit resolution and low INL ensure reliable measurements, while the differential input allows precise measurement of floating signals. The device's SPI interface enables fast data transfer to a host processor, and the busy indicator simplifies synchronization. The wide operating temperature range makes it suitable for benchtop and field instruments.
推薦
Audio and Vibration Analysis
The AD7693BCPZ's high dynamic range and low distortion make it suitable for audio and vibration analysis applications. Its 96.5 dB dynamic range captures subtle variations in sound and vibration signals, enabling accurate spectral analysis. The differential input reduces common-mode noise, which is critical in noisy environments. With a sampling rate of 500 kSPS, it can capture frequencies up to 250 kHz, covering most audio and mechanical vibration ranges.
推薦
推薦產品摘要
工程參考資料，適用於 AD7693BCPZ — 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 | AD7693BRMZ | AD7690BCPZ | AD7686BRMZ | ADS8319IDGST |
|---|---|---|---|---|---|
| Package | 10-Lead LFCSP-WD (3x3 mm) | 10-Lead MSOP | 10-Lead LFCSP-WD (3x3 mm) | 10-Lead MSOP | 10-Lead VSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits |
| Sampling Rate | 500 kSPS | 500 kSPS | 400 kSPS | 500 kSPS | 500 kSPS |
| Input Type | Differential | Differential | Single-ended | Single-ended | Single-ended |
| INL (Max) | ±0.5 LSB | ±0.5 LSB | ±0.5 LSB | ±0.5 LSB | ±0.5 LSB |
| Dynamic Range | 96.5 dB | 96.5 dB | 96.5 dB | 96.5 dB | 96.5 dB |
| Supply Voltage | 4.5V to 5V | 4.5V to 5V | 4.5V to 5V | 4.5V to 5V | 2.25V to 5.5V |
主要差異化特點
- Differential input capability (對比AD7690BCPZ)
- Higher sampling rate (對比AD7690BCPZ)
- Smaller package (對比AD7693BRMZ)
設計說明
The AD7693BCPZ requires a clean 5V supply for optimal performance. Use a low-noise LDO regulator, such as the ADP151, to provide the VDD supply. Decouple VDD with a 10uF ceramic capacitor and a 0.1uF capacitor placed close to the pin. The VIO supply can be 1.8V to 5V and should be decoupled with a 1uF capacitor. Ensure the reference voltage (REF) is low-impedance and well-filtered, as it directly affects conversion accuracy.
For best performance, use a solid ground plane and minimize trace lengths for the analog input and reference pins. Place the ADC close to the signal source to reduce noise pickup. Use separate analog and digital ground planes, connected at a single point. The SPI lines (SCK, SDI, SDO, CNV) should be routed away from analog traces to avoid digital noise coupling. Consider using series resistors on SPI lines to reduce ringing.
A common mistake is driving the differential input with a high-impedance source, which can cause settling errors. Use a low-impedance driver, such as an op-amp buffer, to drive IN+ and IN-. Also, ensure the reference voltage is stable and has low noise; a noisy reference will degrade SNR. Avoid exceeding the absolute maximum ratings on any pin, and ensure the VIO supply is within the specified range to prevent logic interface issues.
合規資訊
RoHS compliant per Analog Devices product page. Lead-free package (CPZ suffix). Not AEC-Q100 qualified.
