AD7768-4BSTZ-RL - 24-Bit 4-Ch ADC, 256kSPS | Analog Devices
MPN： AD7768-4BSTZ-RL ✓ 啟用中AD7768-4BSTZ-RL 概覽
A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution. It is part of the ADC family, which converts analog signals to digital for processing in microcontrollers, DSPs, and FPGAs. Sigma-delta ADCs are preferred for precision measurement applications due to their excellent linearity and noise performance.
Key features include three power modes (fast, median, low power) that allow trade-offs between input bandwidth, output data rate, and power dissipation. The AD7768-4 supports a wide input voltage range and provides a flexible digital interface with both SPI and parallel output options. It also features a low-pass digital filter with programmable decimation, enabling users to optimize for noise and bandwidth.
The AD7768-4 uses a high-performance analog front-end with a precision reference and internal oscillator, reducing external component count. Its simultaneous sampling capability ensures accurate phase matching across channels, critical for multi-phase power monitoring and vibration analysis. The device operates from a 2.5 V analog supply and a 1.8 V digital supply, with power dissipation scaling with mode.
Typical applications include power quality monitoring, vibration analysis, motor control, and data acquisition systems. The AD7768-4 is ideal for industrial automation, energy metering, and test and measurement equipment where high accuracy and synchronized multi-channel sampling are required.
When designing with this ADC, ensure proper decoupling of the analog and digital supplies and use a low-noise reference to achieve the specified dynamic range. The digital filter settings should be configured to match the desired bandwidth and output data rate.
直接替換替代品，適用於 AD7768-4BSTZ-RL — 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： AD7768-4BSTZ-RL （相同外形與佔位） — 差異在於 Input Type, Operating Temperature Range, Architecture, Number of Channels, Package.
AD7768-4BSTZ
✅ 直接替換✗ 缺貨
$25.4545 / 單位
查看資料表 →AD7768BSTZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADS1274
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADS127L11
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD7768-4BSTZ-RL
✅ 直接替換聯絡詢價
查看資料表 →AD7768-4BSTZ-RL 最大額定值與電氣特性
| 解析度 | 24 Bit |
| Number of Channels | 4 |
| 取樣率 | 256 kSPS |
| Input Type | Single-Ended |
| 介面類型 | SPI |
| Architecture | Sigma-Delta |
| Dynamic Range | 108 dB |
| Input Bandwidth | 110.8 kHz |
| THD | -120 dB |
| Power Modes | Fast, Median, Low Power |
| Analog Supply Voltage | 2.5 V |
| Digital Supply Voltage | 1.8 V |
| 封裝 | 64-LQFP (10x10 mm) |
| 工作溫度範圍 | -40C to +105C |
| 安裝類型 | Surface Mount |
AD7768-4BSTZ-RL 腳位配置
| 腳位 1 | AVDD — Analog power supply |
| 腳位 2 | AVSS — Analog ground |
| 腳位 3 | VIN+ — Positive analog input channel 1 |
| 腳位 4 | VIN- — Negative analog input channel 1 |
| 腳位 5 | VIN+ — Positive analog input channel 2 |
| 腳位 6 | VIN- — Negative analog input channel 2 |
| 腳位 7 | VIN+ — Positive analog input channel 3 |
| 腳位 8 | VIN- — Negative analog input channel 3 |
| 腳位 9 | VIN+ — Positive analog input channel 4 |
| 腳位 10 | VIN- — Negative analog input channel 4 |
| 腳位 11 | REF+ — Positive reference input |
| 腳位 12 | REF- — Negative reference input |
| 腳位 13 | DVDD — Digital power supply |
| 腳位 14 | DGND — Digital ground |
| 腳位 15 | SCLK — Serial clock input |
| 腳位 16 | SDI — Serial data input |
| 腳位 17 | SDO — Serial data output |
| 腳位 18 | CS — Chip select |
| 腳位 19 | RESET — Reset input |
| 腳位 20 | SYNC — Synchronization input |
典型應用
AD7768-4BSTZ-RL 適用於 6 應用s: Power Quality Monitoring, Vibration Analysis, Motor Control, Data Acquisition Systems, Medical Instrumentation, Audio Test Equipment.
Power Quality Monitoring
The AD7768-4BSTZ-RL's 4-channel simultaneous sampling and 108 dB dynamic range enable accurate measurement of voltage and current in three-phase power systems. It captures harmonics and transients with high fidelity, essential for grid monitoring and energy metering. The device's low THD (-120 dB) ensures precise harmonic analysis, while the flexible digital filter allows bandwidth optimization for different standards.
推薦
Vibration Analysis
Simultaneous sampling across 4 channels ensures phase-accurate capture of vibration signals from accelerometers, critical for modal analysis and machine health monitoring. The 110.8 kHz input bandwidth covers high-frequency vibration components, while the 108 dB dynamic range resolves small amplitude variations. The device's low noise floor enables early detection of bearing faults and imbalance.
推薦
Motor Control
The AD7768-4BSTZ-RL provides high-resolution current and voltage sensing for field-oriented control (FOC) of motors. Its simultaneous sampling ensures accurate phase current measurement, improving torque control and efficiency. The device's high dynamic range allows precise speed and position feedback, while the SPI interface simplifies connection to microcontrollers or DSPs.
推薦
Data Acquisition Systems
As a high-resolution, multi-channel ADC, the AD7768-4BSTZ-RL is ideal for general-purpose data acquisition in test and measurement equipment. Its 256 kSPS per channel rate and 108 dB dynamic range capture fast transients and small signals accurately. The device's three power modes allow optimization for battery-powered or high-performance systems.
推薦
Medical Instrumentation
The AD7768-4BSTZ-RL's low noise and high resolution make it suitable for medical imaging and patient monitoring. Its simultaneous sampling ensures accurate multi-channel physiological signal acquisition, such as EEG and ECG. The device's small package and low power modes support portable devices, while the SPI interface integrates with medical-grade microcontrollers.
推薦
Audio Test Equipment
With 108 dB dynamic range and -120 dB THD, the AD7768-4BSTZ-RL is excellent for audio analysis, measuring distortion and noise in high-end audio equipment. Its simultaneous sampling supports multi-channel audio testing, while the wide input bandwidth covers the full audio spectrum. The device's low noise floor enables accurate measurement of low-level signals.
推薦
推薦產品摘要
工程參考資料，適用於 AD7768-4BSTZ-RL — 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 | AD7768-4BSTZ | AD7768BSTZ | ADS1274 | ADS127L11 |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Number of Channels | 4 | 4 | 8 | 4 | 4 |
| Max Sampling Rate | 256 kSPS | 256 kSPS | 256 kSPS | 144 kSPS | 106 kSPS |
| Dynamic Range | 108 dB | 108 dB | 108 dB | 106 dB | 108 dB |
| THD | -120 dB | -120 dB | -120 dB | -110 dB | -120 dB |
| Power Modes | 3 (Fast, Median, Low) | 3 (Fast, Median, Low) | 3 (Fast, Median, Low) | 2 (High-Speed, High-Resolution) | 2 (High-Speed, Low-Power) |
主要差異化特點
- Higher sampling rate than ADS1274 (對比ADS1274)
- Three power modes for flexibility (對比ADS1274)
- Same package as AD7768BSTZ (對比AD7768BSTZ)
設計說明
Use separate analog and digital supply planes with ferrite beads to isolate noise. Decouple AVDD with 10uF and 0.1uF capacitors close to the pins, and DVDD with 1uF and 0.1uF. Ensure the reference is low-noise and well-bypassed to achieve the specified dynamic range.
Place the ADC close to the signal source to minimize trace inductance. Use a solid ground plane under the device and route analog and digital signals separately. Avoid crossing analog and digital traces to prevent crosstalk.
Do not exceed the absolute maximum ratings on any pin. Ensure the input common-mode voltage is within the specified range. Configure the digital filter correctly to avoid aliasing; use the SYNC pin to align multiple ADCs in multi-device systems.
合規資訊
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
