AD7793BRUZ - 24-Bit Sigma-Delta ADC, 3-Channel | Analog Devices
MPN: AD7793BRUZ ✓ نشطAD7793BRUZ نظرة عامة
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.
بدائل مباشرة لـ AD7793BRUZ — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع AD7793BRUZ (نفس عامل الشكل والبصمة) — يختلف في Package, Resolution, Operating Temperature Range, Supply Voltage, Current Consumption.
AD7793BRUZ-REEL
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
AD7792BRUZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←AD7793BRUZ الحدود القصوى والخصائص الكهربائية
| الدقة | 24 Bit |
| Number of Channels | 3 Differential |
| Input Type | Differential |
| Data Interface | SPI |
| معدل أخذ العينات | 470 SPS |
| Architecture | Sigma-Delta |
| جهد التغذية | 2.7 V to 5.25 V |
| درجة حرارة التشغيل | -40C to +105C |
| العلبة | 16-TSSOP |
| نوع التركيب | 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 |
| حالة RoHS | Compliant |
تكوين أطراف AD7793BRUZ
| دبوس 1 | SCLK — Serial clock input |
| دبوس 2 | DIN — Serial data input |
| دبوس 3 | DOUT/RDY — Serial data output / ready |
| دبوس 4 | CS — Chip select |
| دبوس 5 | GND — Ground |
| دبوس 6 | AVDD — Analog power supply |
| دبوس 7 | AIN1(+) — Analog input 1 positive |
| دبوس 8 | AIN1(-) — Analog input 1 negative |
| دبوس 9 | AIN2(+) — Analog input 2 positive |
| دبوس 10 | AIN2(-) — Analog input 2 negative |
| دبوس 11 | AIN3(+) — Analog input 3 positive |
| دبوس 12 | AIN3(-) — Analog input 3 negative |
| دبوس 13 | REFIN(+) — Reference input positive |
| دبوس 14 | REFIN(-) — Reference input negative |
| دبوس 15 | DVDD — Digital power supply |
| دبوس 16 | SYNC — Synchronization input |
التطبيقات النموذجية
AD7793BRUZ مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ AD7793BRUZ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- 24-bit resolution with low noise (مقابلAD7792BRUZ)
- On-chip instrumentation amplifier and reference (مقابلADS1220)
- Lower power consumption (مقابلAD7124-4)
ملاحظات التصميم
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.
معلومات الامتثال
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated for this part.
