AD7793BRUZ - 24-Bit Sigma-Delta ADC, 3-Channel | Analog Devices
MPN： AD7793BRUZ ✓ 啟用中AD7793BRUZ 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 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.
直接替換替代品，適用於 AD7793BRUZ — 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： AD7793BRUZ （相同外形與佔位） — 差異在於 Package, Resolution, Operating Temperature Range, Supply Voltage, Current Consumption.
AD7793BRUZ-REEL
✅ 直接替換📋 參考替代品（不在目錄中）
AD7792BRUZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD7793BRUZ 最大額定值與電氣特性
| 解析度 | 24 Bit |
| Number of Channels | 3 Differential |
| Input Type | Differential |
| Data Interface | SPI |
| 取樣率 | 470 SPS |
| Architecture | Sigma-Delta |
| 供應電壓 | 2.7 V to 5.25 V |
| 工作溫度 | -40C to +105C |
| 封裝 | 16-TSSOP |
| 安裝類型 | 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 |
| RoHS 狀態 | Compliant |
AD7793BRUZ 腳位配置
| 腳位 1 | SCLK — Serial clock input |
| 腳位 2 | DIN — Serial data input |
| 腳位 3 | DOUT/RDY — Serial data output / ready |
| 腳位 4 | CS — Chip select |
| 腳位 5 | GND — Ground |
| 腳位 6 | AVDD — Analog power supply |
| 腳位 7 | AIN1(+) — Analog input 1 positive |
| 腳位 8 | AIN1(-) — Analog input 1 negative |
| 腳位 9 | AIN2(+) — Analog input 2 positive |
| 腳位 10 | AIN2(-) — Analog input 2 negative |
| 腳位 11 | AIN3(+) — Analog input 3 positive |
| 腳位 12 | AIN3(-) — Analog input 3 negative |
| 腳位 13 | REFIN(+) — Reference input positive |
| 腳位 14 | REFIN(-) — Reference input negative |
| 腳位 15 | DVDD — Digital power supply |
| 腳位 16 | SYNC — Synchronization input |
典型應用
AD7793BRUZ 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 AD7793BRUZ — 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 | 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 |
主要差異化特點
- 24-bit resolution with low noise (對比AD7792BRUZ)
- On-chip instrumentation amplifier and reference (對比ADS1220)
- Lower power consumption (對比AD7124-4)
設計說明
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.
合規資訊
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated for this part.
