AD7384-4BCPZ - 14-Bit Quad SAR ADC, 4MSPS | Analog Devices
MPN： AD7384-4BCPZ ✓ 啟用中AD7384-4BCPZ 概覽
A SAR ADC uses a binary-search algorithm through an internal capacitive DAC to convert an analog sample into a digital word one bit at a time. SAR converters are valued for their low latency, high accuracy, and moderate power consumption; they sit within the larger ADC hierarchy as a precision data converter family positioned between delta-sigma ADCs for low-speed high-resolution applications and pipeline ADCs for very high-speed applications. This AD7384-4 is specifically engineered for applications that require simultaneous capture of multiple channels with sample-to-sample matching.
Key features include an on-chip oversampling block that can boost effective resolution by up to two bits at reduced bandwidths, a buffered internal 2.5 V reference, and support for an external reference up to 3.3 V for increased input span. The device operates from a 3.0 V to 3.3 V analog supply, and includes low power modes. The 14-bit resolution is well matched to precision current and voltage sensing, while the quad simultaneous architecture eliminates inter-channel skew that can cause phase errors in multi-phase systems.
The ADC integrates a high speed serial interface with daisy-chain capability and a busy indicator, simplifying connection to FPGAs, DSPs, and microcontrollers. Pin-compatible family devices provide a migration path between 14-bit and 16-bit resolution without layout changes. The oversampling engine can be programmed for 2x, 4x, 8x, 16x, or 32x averaging, trading throughput for improved noise performance.
Typical applications include motor control drives, power quality analysis, protective relays, medical ultrasound, aerospace instrumentation, and general multi-channel test and measurement. The simultaneous nature of the four channels is especially important in three-phase power applications where voltage and current vectors must be captured at the same instant.
For successful designs, pay careful attention to reference bypassing, input common-mode settings, and SPI timing. The analog input pins are pseudo-differential and need to be driven from low-impedance sources to maintain the specified SNR at 4 MSPS.
直接替換替代品，適用於 AD7384-4BCPZ — 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： AD7384-4BCPZ （相同外形與佔位） — 差異在於 Package, Resolution, Input Type, Sampling Rate, Architecture.
AD7383-4BCPZ
✅ 直接替換聯絡詢價
查看資料表 →AD7380-4BCPZ
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD7381-4BCPZ
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD7389-4BCPZ
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD7384-4BCPZ 最大額定值與電氣特性
| 解析度 | 14 Bit |
| Number of Channels | 4 Inputs |
| Architecture | SAR (Successive Approximation Register) |
| 取樣率 | 4 MSPS |
| Input Type | Pseudo-Differential |
| Voltage Supply | 3.0 V to 3.3 V |
| Reference Type | Internal buffered 2.5 V, external up to 3.3 V |
| Oversampling | Yes, up to 2 bits of added resolution |
| Number of SAR ADCs | 4 |
| Simultaneous Sampling | Yes |
| Data Interface | SPI |
| 封裝 | 24-LFCSP (4x4 mm) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +125C |
| RoHS 狀態 | Compliant |
| Lead Free | Yes |
AD7384-4BCPZ 24-lfcsp (4x4 mm) 腳位配置指南
AD7384-4BCPZ（24-lfcsp (4x4 mm) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： AD7384-4BCPZ.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD7384-4BCPZ 適用於 6 應用s: Motor Control Drives, Power Quality Monitoring, Medical Ultrasound, Test and Measurement, Aerospace Instrumentation, Industrial Data Acquisition.
Motor Control Drives
The AD7384-4BCPZ is well suited to three-phase motor control because it samples all phase currents and the DC bus voltage simultaneously, eliminating current/voltage phase errors that reduce torque estimation accuracy. Its 4 MSPS throughput supports demanding FOC loops, while the 14-bit resolution is sufficient for most industrial drives. The 3.0V to 3.3V supply and SPI interface connect directly to a real-time microcontroller or FPGA. Recommended companion products include STM32F446VCT6 for control processing and XC7Z020 for FPGA-based gate timing and protection logic.
推薦
Power Quality Monitoring
Power quality analyzers require simultaneous sampling of three voltages and three currents to compute real, reactive, and harmonic powers. The AD7384-4 captures four channels at the same instant at up to 4 MSPS, and its oversampling block can improve low-frequency dynamic range for harmonic analysis. The buffered 2.5V internal reference simplifies analog front-end design. For a complete metering solution, ADE9430ACPZ can perform energy calculations in parallel, while XC7Z020 can aggregate data from multiple AD7384-4 devices for wideband waveform streaming.
推薦
Medical Ultrasound
In ultrasound beamforming, multiple receive channels must be sampled simultaneously to preserve phase relationships across transducer elements. The AD7384-4 provides four pseudo-differential inputs and simultaneous SAR conversion at 4 MSPS, enabling compact multi-channel front-ends. Its deterministic low-latency conversion is important for real-time image formation. The 24-LFCSP package keeps PCB area small. The device can be paired with an FPGA such as XC7Z030-1FBG484I for beamforming, and a host MCU for system control and image post-processing.
推薦
Test and Measurement
The AD7384-4 is a strong fit for multi-channel data acquisition cards, logic analyzers, and oscilloscope front-ends because it combines four simultaneous channels, 4 MSPS sampling, and SPI in a small LFCSP package. The on-chip oversampling allows the user to trade throughput for additional noise averaging, which is useful for low-frequency precision measurements. The pseudo-differential inputs accept a variety of sensor front-ends when paired with precision amplifiers. An FPGA like XC7A100T can buffer and process the ADC stream, while a high-level MCU handles communication with the host system.
推薦
Aerospace Instrumentation
Aerospace data acquisition systems often require rugged, low-latency converters that can sample multiple sensor channels simultaneously. The AD7384-4’s quad SAR architecture, 4 MSPS rate, and industrial temperature range make it suitable for vibration monitoring, flight control feedback, and engine test instrumentation. Its low power and small 24-LFCSP package help reduce board space and thermal budget. The SPI interface can be isolated and connected to a radiation-tolerant FPGA or a standard controller such as XC7Z045-2FFG900I for telemetry processing.
推薦
Industrial Data Acquisition
General industrial DAQ systems need reliable multi-channel converters with low inter-channel skew. The AD7384-4 offers simultaneous sampling of four channels at 4 MSPS, a buffered reference, and oversampling to reduce noise. It operates directly from 3.0V to 3.3V rails found in many sensor hubs. The SPI interface can daisy-chain multiple converters for channel expansion. The recommended STM32F446VCT6 MCU provides a simple host environment, while XC7Z020 enables advanced triggering and real-time processing.
推薦
推薦產品摘要
工程參考資料，適用於 AD7384-4BCPZ — 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 | AD7383-4BCPZ | AD7380-4BCPZ | AD7381-4BCPZ | AD7389-4BCPZ |
|---|---|---|---|---|---|
| Package | 24-LFCSP (4x4) | 24-LFCSP (4x4) | 24-LFCSP (4x4) | 24-LFCSP (4x4) | 24-LFCSP (4x4) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 14 Bit | 16 Bit | 16 Bit | 14 Bit | 16 Bit |
| Number of Inputs | 4 | 4 | 4 | 4 | 4 |
| Max Sampling Rate | 4 MSPS | 4 MSPS | 4 MSPS | 4 MSPS | 4 MSPS |
| Data Interface | SPI | SPI | SPI | SPI | SPI |
| Internal Reference | 2.5 V buffered, external up to 3.3 V | 2.5 V buffered, external up to 3.3 V | 2.5 V buffered, external up to 3.3 V | 2.5 V buffered, external up to 3.3 V | 2.5 V buffered, external up to 3.3 V |
| Oversampling | Yes, up to 2 bits added resolution | Yes, up to 2 bits added resolution | Yes | Yes | Yes, enhanced mode |
| Input Type | Pseudo-Differential | Pseudo-Differential | Pseudo-Differential | Pseudo-Differential | Pseudo-Differential |
主要差異化特點
- Quad simultaneous sampling with 14-bit resolution (對比AD7383-4BCPZ)
- On-chip oversampling improves effective resolution by up to 2 bits (對比AD7389-4BCPZ)
- Same board footprint across the quad family (對比AD7381-4BCPZ)
設計說明
Place a 100 nF ceramic capacitor close to each supply pin (VDD and VDRIVE) and a 10 uF bulk capacitor near the ADC. The reference pin should be bypassed with a 1 uF low-ESR capacitor, and this capacitor should be placed directly between REF and REFGND. The internal reference buffer requires a low-impedance ground connection to maintain accuracy at 4 MSPS and to support the on-chip oversampling engine.
Use a continuous ground plane under the 24-LFCSP package and solder the exposed thermal pad to the PCB ground plane. Keep analog input traces short and shielded from digital SPI lines. Separate analog and digital ground returns at the ADC, joining them at the thermal pad. This layout minimizes coupling of SPI clock noise into the pseudo-differential inputs and preserves SNR.
Verify the pseudo-differential input common-mode range before connecting the ADC. The input span is defined relative to REF; exceeding the common-mode range causes linearity errors. Also confirm SPI mode and timing in the AD7384-4 datasheet, especially CS setup/hold time when operating at 4 MSPS. Do not leave the reference pin un-bypassed, as this degrades undersampled measurements.
合規資訊
RoHS compliance indicated by distributor listing. No AEC-Q100 qualification is specified for this part in the available data.