AD7768-4BSTZ - 24-Bit 4-Ch Simultaneous ADC | Analog Devices
MPN: AD7768-4BSTZ ✓ Hoạt động| Số lượng | Giá đơn vị | Phụ |
|---|---|---|
| 1 | $43.6364 | $43,64 |
| 10 | $31.5152 | $315,15 |
| 100 | $27.8788 | $2.787,88 |
| 500 | $26.6667 | $13.333,35 |
| 1.000 | $25.4545 | $25.454,50 |
AD7768-4BSTZ Tóm tắt
An ADC (analog-to-digital converter) is a device that converts continuous analog signals into discrete digital numbers. The AD7768-4 is a sigma-delta ADC, which uses oversampling and noise shaping to achieve high resolution and excellent noise performance. It belongs to the family of precision data converters, specifically simultaneous sampling ADCs, which capture multiple channels at the exact same instant, essential for applications like power monitoring and vibration analysis.
Key features of the AD7768-4BSTZ include three power modes (fast, median, and low power) that allow the user to trade off input bandwidth, output data rate, and power dissipation. It offers a wideband low-pass filter with ±0.005 dB pass-band ripple and 105 dB stop-band attenuation at the Nyquist frequency. The device operates from a 2.5 V analog supply and a 2.5 V to 3.3 V digital interface supply, with a typical power dissipation of 27.5 mW in low power mode.
The AD7768-4 uses a sigma-delta modulator with a digital decimation filter, providing a flexible digital interface (SPI) for configuration and data readout. It includes an internal reference buffer and supports both differential and single-ended inputs. The device is specified over the industrial temperature range of -40°C to +105°C.
Typical applications include power line monitoring, vibration analysis, motor control, and multi-phase energy metering. Its simultaneous sampling capability and high accuracy make it ideal for systems requiring precise phase alignment between channels.
When designing with the AD7768-4, ensure proper decoupling of the analog and digital supplies, and use a low-jitter master clock to achieve the specified SNR. The power mode selection should be optimized based on the required bandwidth and power budget.
Bộ thay thế dễ dàng lắp đặt cho AD7768-4BSTZ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AD7768-4BSTZ (cùng hình factor và footprint) — khác nhau ở Package, Number of Channels, Power Modes, Digital Supply Voltage, Input Type.
Công cụ so sánh nhanh — Chọn các bộ phận thay thế để so sánh song song:
AD7768-4BSTZ-RL
Liên hệ để biết giá
Xem tài liệu →AD7768BSTZ
📋 Tham chiếu thay thế (không có trong danh mục)
ADS1274
📋 Tham chiếu thay thế (không có trong danh mục)
ADS1174
📋 Tham chiếu thay thế (không có trong danh mục)
AD7779
📋 Tham chiếu thay thế (không có trong danh mục)
AD7768-4BSTZ Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 24 bit |
| Number of Channels | 4 |
| Tỷ lệ lấy mẫu | 256 kSPS |
| Input Type | Differential, Single-Ended |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| Input Bandwidth | 110.8 kHz |
| Power Modes | Fast, Median, Low Power |
| Analog Supply Voltage | 2.5 V |
| Digital Supply Voltage | 2.5 V to 3.3 V |
| Khoảng nhiệt độ hoạt động | -40°C to +105°C |
| Hộp | 64-LQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Pass-Band Ripple | ±0.005 dB |
| Stop-Band Attenuation | 105 dB at Nyquist |
| Trạng thái RoHS | Compliant |
Cấu hình chân AD7768-4BSTZ
| Chân 1 | AVDD1 — Analog power supply 2.5V |
| Chân 2 | AVSS1 — Analog ground |
| Chân 3 | AIN0+ — Positive analog input channel 0 |
| Chân 4 | AIN0- — Negative analog input channel 0 |
| Chân 5 | AIN1+ — Positive analog input channel 1 |
| Chân 6 | AIN1- — Negative analog input channel 1 |
| Chân 7 | AIN2+ — Positive analog input channel 2 |
| Chân 8 | AIN2- — Negative analog input channel 2 |
| Chân 9 | AIN3+ — Positive analog input channel 3 |
| Chân 10 | AIN3- — Negative analog input channel 3 |
| Chân 11 | REF+ — Positive reference input |
| Chân 12 | REF- — Negative reference input |
| Chân 13 | DVDD — Digital power supply 2.5V to 3.3V |
| Chân 14 | DGND — Digital ground |
| Chân 15 | SCLK — Serial clock input |
| Chân 16 | SDI — Serial data input |
| Chân 17 | SDO — Serial data output |
| Chân 18 | CS — Chip select (active low) |
| Chân 19 | DRDY — Data ready output |
| Chân 20 | RESET — Reset input (active low) |
| Chân 21 | SYNC_IN — Synchronization input |
| Chân 22 | MCLK — Master clock input |
| Chân 23 | PWDN — Power down input |
| Chân 24 | GPIO0 — General purpose I/O |
| Chân 25 | GPIO1 — General purpose I/O |
| Chân 26 | GPIO2 — General purpose I/O |
| Chân 27 | GPIO3 — General purpose I/O |
| Chân 28 | AVDD2 — Analog power supply 2.5V |
| Chân 29 | AVSS2 — Analog ground |
| Chân 30 | VDRIVE — Digital interface supply |
| Chân 31 | DVDD2 — Digital power supply |
| Chân 32 | DGND2 — Digital ground |
Ứng dụng tiêu biểu
AD7768-4BSTZ phù hợp cho 6 Áp dụngs: Power Line Monitoring, Vibration Analysis, Motor Control, Multi-Phase Energy Metering, Audio Test and Measurement, Data Acquisition Systems.
Power Line Monitoring
The AD7768-4BSTZ is ideal for power line monitoring systems that require simultaneous sampling of voltage and current across multiple phases. Its 24-bit resolution and 256 kSPS data rate enable accurate measurement of harmonics and power quality. The device's three power modes allow optimization for low power consumption in battery-powered monitors, while the wideband filter ensures minimal phase error between channels. With a 110.8 kHz input bandwidth, it captures high-frequency transients essential for fault detection. The SPI interface simplifies data transfer to a host processor, and the industrial temperature range supports outdoor deployment.
Được đề xuất
Vibration Analysis
In vibration analysis, the AD7768-4BSTZ provides simultaneous sampling of multiple accelerometer signals, ensuring accurate phase relationships for modal analysis. Its 24-bit resolution captures fine vibration details, and the 256 kSPS data rate supports high-frequency vibration monitoring. The low power modes are beneficial for portable diagnostic equipment. The device's high SNR and low distortion enable precise detection of bearing faults and imbalance. The SPI output allows easy interfacing with FPGAs or DSPs for real-time processing. The compact 64-LQFP package fits space-constrained designs.
Được đề xuất
Motor Control
The AD7768-4BSTZ is well-suited for motor control applications requiring simultaneous sampling of phase currents and voltages. Its 24-bit resolution and 256 kSPS data rate enable precise current sensing for field-oriented control. The device's low power consumption is advantageous in inverter drives. The wideband input filter reduces aliasing, and the SPI interface provides fast data transfer to a microcontroller. The industrial temperature range ensures reliable operation in harsh environments. The simultaneous sampling capability ensures accurate torque and speed control by aligning current and voltage measurements.
Được đề xuất
Multi-Phase Energy Metering
For multi-phase energy metering, the AD7768-4BSTZ offers simultaneous sampling of voltage and current from multiple phases, ensuring accurate power and energy calculations. Its 24-bit resolution provides high accuracy over a wide dynamic range, and the 256 kSPS data rate supports harmonic analysis. The device's three power modes allow metering applications to balance performance and power consumption. The SPI interface enables easy integration with metering SoCs. The device's low offset and gain drift ensure long-term stability, critical for revenue-grade metering. The compact package is suitable for smart meter designs.
Được đề xuất
Audio Test and Measurement
The AD7768-4BSTZ can be used in audio test equipment for simultaneous measurement of multiple audio channels. Its 24-bit resolution and 256 kSPS data rate capture high-frequency audio signals with low distortion. The device's low noise performance is essential for accurate THD measurements. The wideband filter ensures flat response across the audio band. The SPI interface allows easy integration with audio analyzers. The device's power modes enable portable test instruments to conserve battery life. The industrial temperature range supports use in production test environments.
Được đề xuất
Data Acquisition Systems
The AD7768-4BSTZ is a key component in high-performance data acquisition systems (DAQ) requiring simultaneous sampling of multiple analog signals. Its 24-bit resolution and 256 kSPS data rate provide high accuracy for industrial and scientific measurements. The device's three power modes allow DAQ systems to optimize for speed or power. The SPI interface simplifies connection to FPGAs or microcontrollers. The wideband filter reduces aliasing, and the industrial temperature range ensures reliability in harsh environments. The compact package enables dense channel density in multi-channel DAQ modules.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7768-4BSTZ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | AD7768-4BSTZ-RL | AD7768BSTZ | ADS1274 | ADS1174 | AD7779 |
|---|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | HTQFP-64 - different | HTQFP-64 - different | LQFP-64 - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Analog Devices |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 16 bit | 24 bit |
| Number of Channels | 4 | 4 | 8 | 4 | 4 | 8 |
| Max Sampling Rate | 256 kSPS | 256 kSPS | 256 kSPS | 144 kSPS | 52 kSPS | 128 kSPS |
| Input Bandwidth | 110.8 kHz | 110.8 kHz | 110.8 kHz | 62 kHz | 23.4 kHz | 50 kHz |
| Power Modes | 3 (fast, median, low) | 3 | 3 | 2 (high-speed, high-resolution) | 2 | 3 |
| Data Interface | SPI | SPI | SPI | SPI | SPI | SPI |
Bảo phân biệt quan trọng
- Three power modes for flexibility (vsADS1274)
- Higher input bandwidth (vsADS1274)
- Same package as 8-channel version (vsAD7768BSTZ)
Ghi chú thiết kế
The AD7768-4BSTZ requires a clean 2.5V analog supply and a 2.5V to 3.3V digital supply. Use low-dropout regulators (LDOs) with low noise, such as the ADP151, to power AVDD and DVDD. Decouple each supply pin with a 10uF and 0.1uF capacitor placed close to the pins. The VDRIVE pin should be connected to the same supply as the host interface to ensure proper logic levels.
For optimal performance, use a solid ground plane and separate analog and digital ground planes, connecting them at a single point near the ADC. Route analog inputs away from digital traces to minimize coupling. Place the reference decoupling capacitors close to the REF+ and REF- pins. Use a low-jitter master clock source, such as a crystal oscillator, to achieve the specified SNR.
Ensure the master clock frequency is within the specified range (typically 32.768 MHz for 256 kSPS). Incorrect clock frequency will result in incorrect output data rates. Also, avoid floating unused analog inputs; tie them to AVSS or a common-mode voltage. The RESET pin must be held low for at least 10ns after power-up to initialize the device properly.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
