AD7768-4BSTZ-RL - 24-Bit 4-Ch ADC, 256kSPS | Analog Devices
料号： AD7768-4BSTZ-RL ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.9 | $169.00 |
| 100 | $14.75 | $1,475.00 |
| 500 | $13.2 | $6,600.00 |
| 1,000 | $11.85 | $11,850.00 |
AD7768-4BSTZ-RL 概述
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.
直接替换替代料： AD7768-4BSTZ-RL ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AD7768-4BSTZ-RL （相同外形与封装尺寸） ——差异在于 Input Type, Operating Temperature Range, Architecture, Number of Channels, Package.
快速对比工具——选择替代料号进行并排对比：
AD7768-4BSTZ
✅ 直接替换✓ 有现货
$25.4545 / 个
查看数据手册 →AD7768BSTZ
✅ 直接替换📋 参考替代料（不在目录中）
ADS1274
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADS127L11
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$8.1 / 个
查看数据手册 →AD7768-4BSTZ-RL
✅ 直接替换✓ 有现货
$11.85 / 个
查看数据手册 →AD7768-4BSTZ-RL 最大额定值与电气特性
| 分辨率 | 24 Bit |
| Number of Channels | 4 |
| 采样率 | 256 kSPS |
| Input Type | Single-Ended |
| 接口类型 | 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 |
| 封装 | 64-LQFP (10x10 mm) |
| 工作温度范围 | -40C to +105C |
| 安装类型 | Surface Mount |
AD7768-4BSTZ-RL 引脚配置
| 引脚 1 | AVDD — Analog power supply |
| 引脚 2 | AVSS — Analog ground |
| 引脚 3 | VIN+ — Positive analog input channel 1 |
| 引脚 4 | VIN- — Negative analog input channel 1 |
| 引脚 5 | VIN+ — Positive analog input channel 2 |
| 引脚 6 | VIN- — Negative analog input channel 2 |
| 引脚 7 | VIN+ — Positive analog input channel 3 |
| 引脚 8 | VIN- — Negative analog input channel 3 |
| 引脚 9 | VIN+ — Positive analog input channel 4 |
| 引脚 10 | VIN- — Negative analog input channel 4 |
| 引脚 11 | REF+ — Positive reference input |
| 引脚 12 | REF- — Negative reference input |
| 引脚 13 | DVDD — Digital power supply |
| 引脚 14 | DGND — Digital ground |
| 引脚 15 | SCLK — Serial clock input |
| 引脚 16 | SDI — Serial data input |
| 引脚 17 | SDO — Serial data output |
| 引脚 18 | CS — Chip select |
| 引脚 19 | RESET — Reset input |
| 引脚 20 | SYNC — Synchronization input |
典型应用
AD7768-4BSTZ-RL 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： AD7768-4BSTZ-RL ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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) |
关键差异点
- Higher sampling rate than ADS1274 （对比 ADS1274)
- Three power modes for flexibility （对比 ADS1274)
- Same package as AD7768BSTZ （对比 AD7768BSTZ)
设计说明
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.
合规信息
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
