AD7793BRUZ - 24-Bit Sigma-Delta ADC, 3-Channel | Analog Devices
MPN: AD7793BRUZ ✓ Hoạt độngAD7793BRUZ Tóm tắt
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 and DSPs. Sigma-delta ADCs are known for their high resolution and excellent noise performance, making them suitable for precision instrumentation and sensor interfaces.
Key features include a programmable gain amplifier (PGA) with gains from 1 to 128, a precision low noise, low drift internal band gap reference, and the ability to accept an external differential reference. The device also includes programmable excitation current sources, burnout currents, and a bias voltage generator. It communicates via a SPI-compatible serial interface and operates over a temperature range of -40°C to +105°C.
The AD7793BRUZ uses a sigma-delta modulator with a digital filter, providing flexible output data rates from 4.17 Hz to 470 Hz. The on-chip PGA allows direct connection to low-level sensors such as thermocouples and strain gauges, while the internal reference ensures accuracy without external components. The device's low power consumption of 400 uA typical makes it suitable for battery-powered applications.
Typical applications include temperature measurement with RTDs and thermocouples, pressure and strain gauge interfaces, and industrial process control. The device's low noise and high resolution enable precise measurements in harsh environments. Its SPI interface simplifies connection to microcontrollers, and the small TSSOP package saves board space.
When designing with the AD7793BRUZ, ensure proper decoupling of the AVDD and DVDD supplies with 0.1 uF and 10 uF capacitors. The reference input should be bypassed with a 0.1 uF capacitor. For optimal noise performance, use a low-noise analog supply and keep digital traces away from analog inputs.
Bộ thay thế dễ dàng lắp đặt cho AD7793BRUZ — 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 AD7793BRUZ (cùng hình factor và footprint) — khác nhau ở Package, Resolution, Operating Temperature Range, Supply Voltage, Current Consumption.
AD7793BRUZ-REEL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7792BRUZ
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →AD7793BRUZ Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 24 Bit |
| Number of Channels | 3 Differential |
| Input Type | Differential |
| Data Interface | SPI |
| Tỷ lệ lấy mẫu | 470 SPS |
| Architecture | Sigma-Delta |
| Điện áp cung cấp | 2.7 V to 5.25 V |
| Nhiệt độ hoạt động | -40C to +105C |
| Hộp | 16-TSSOP |
| Kiểu lắp đặt | Surface Mount |
| RMS Noise | 1.5 uV at 16.7 Hz |
| Effective Resolution | 23 bits |
| PGA Gain | 1 to 128 |
| Current Consumption | 400 uA typical |
| Power-Down Current | 1 uA maximum |
| Reference | Internal or External Differential |
| Trạng thái RoHS | Compliant |
Cấu hình chân AD7793BRUZ
| Chân 1 | SCLK — Serial clock input |
| Chân 2 | DIN — Serial data input |
| Chân 3 | DOUT/RDY — Serial data output / ready |
| Chân 4 | CS — Chip select |
| Chân 5 | GND — Ground |
| Chân 6 | AVDD — Analog power supply |
| Chân 7 | AIN1(+) — Analog input 1 positive |
| Chân 8 | AIN1(-) — Analog input 1 negative |
| Chân 9 | AIN2(+) — Analog input 2 positive |
| Chân 10 | AIN2(-) — Analog input 2 negative |
| Chân 11 | AIN3(+) — Analog input 3 positive |
| Chân 12 | AIN3(-) — Analog input 3 negative |
| Chân 13 | REFIN(+) — Reference input positive |
| Chân 14 | REFIN(-) — Reference input negative |
| Chân 15 | DVDD — Digital power supply |
| Chân 16 | SYNC — Synchronization input |
Ứng dụng tiêu biểu
AD7793BRUZ phù hợp cho 6 Áp dụngs: Temperature Measurement, Pressure and Strain Gauge Interfaces, Industrial Process Control, Weigh Scales, Portable Instrumentation, Medical Monitoring.
Temperature Measurement
The AD7793BRUZ is ideal for temperature measurement with RTDs and thermocouples due to its low noise (1.5 uV RMS) and on-chip PGA with gains up to 128. It can directly interface with low-level sensor outputs, and the internal reference ensures accuracy. The device's 24-bit resolution allows precise temperature readings over a wide range, making it suitable for industrial process control and laboratory instruments.
Được đề xuất
Pressure and Strain Gauge Interfaces
With its high resolution and low noise, the AD7793BRUZ is well-suited for pressure sensors and strain gauges. The on-chip PGA allows direct connection to bridge sensors, amplifying small differential signals. The device's low power consumption (400 uA) is beneficial for battery-powered portable instruments. The SPI interface simplifies data transfer to microcontrollers for real-time monitoring.
Được đề xuất
Industrial Process Control
The AD7793BRUZ is designed for industrial process control, offering robust performance over -40°C to +105°C. Its 24-bit resolution and programmable gain enable accurate monitoring of process variables like flow, level, and temperature. The device's low drift internal reference reduces external component count, and the SPI interface allows easy integration with PLCs and industrial controllers.
Được đề xuất
Weigh Scales
The AD7793BRUZ is commonly used in weigh scale applications due to its high resolution and low noise, which are critical for accurate weight measurement. The on-chip PGA can amplify the small signals from load cells, and the internal reference ensures stable performance. The device's low power consumption is advantageous for portable scales, and its SPI interface allows easy calibration and data readout.
Được đề xuất
Portable Instrumentation
The AD7793BRUZ's low power consumption (400 uA typical) and small 16-TSSOP package make it ideal for portable instrumentation. It can operate from a 3.3V battery supply and provides high-resolution measurements for handheld meters, data loggers, and field analyzers. The device's power-down mode (1 uA max) further extends battery life in duty-cycled applications.
Được đề xuất
Medical Monitoring
The AD7793BRUZ is suitable for medical monitoring devices such as patient vital signs monitors and diagnostic equipment. Its high resolution and low noise enable accurate measurement of physiological signals like temperature and pressure. The device's low power consumption is critical for battery-operated medical devices, and its SPI interface allows integration with medical-grade microcontrollers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7793BRUZ — 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 | AD7793BRUZ-REEL | AD7792BRUZ | AD7794BRUZ | ADS1220 | AD7124-4 |
|---|---|---|---|---|---|---|
| Package | 16-TSSOP | 16-TSSOP | 16-TSSOP | 24-TSSOP | 16-TSSOP | 24-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Analog Devices |
| Resolution | 24-bit | 24-bit | 16-bit | 24-bit | 24-bit | 24-bit |
| Number of Channels | 3 differential | 3 differential | 3 differential | 6 differential | 4 differential | 4 differential |
| Supply Voltage | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.3V to 5.5V | 2.7V to 5.25V |
| RMS Noise | 1.5 uV at 16.7 Hz | 1.5 uV at 16.7 Hz | 1.5 uV at 16.7 Hz | 1.5 uV at 16.7 Hz | 1.8 uV at 20 SPS | 1.5 uV at 16.7 Hz |
| PGA Gain | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 |
| Interface | SPI | SPI | SPI | SPI | SPI | SPI |
Bảo phân biệt quan trọng
- 24-bit resolution with low noise (vsAD7792BRUZ)
- On-chip instrumentation amplifier and reference (vsADS1220)
- Lower power consumption (vsAD7124-4)
Ghi chú thiết kế
Decouple the AVDD and DVDD supplies with 0.1 uF and 10 uF capacitors placed close to the pins. Use separate analog and digital ground planes to minimize noise coupling. The AD7793BRUZ operates from 2.7V to 5.25V, so ensure the supply is clean and within this range.
For optimal noise performance, keep analog input traces short and shielded from digital signals. Bypass the reference input with a 0.1 uF capacitor. Use a low-noise analog supply and avoid routing digital traces near the analog inputs. A solid ground plane under the ADC is recommended.
Do not exceed the absolute maximum ratings for supply voltage and input pins. Ensure the reference voltage is stable and within the specified range. When using the internal reference, place a 0.1 uF capacitor on the REFOUT pin. Also, avoid floating unused input pins; tie them to a known potential.
Thông tin tuân thủ
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated for this part.
