AD7780BRUZ - 24-Bit Sigma-Delta ADC, 330µA | Analog Devices
MPN: AD7780BRUZ ✓ نشطAD7780BRUZ نظرة عامة
A sigma-delta ADC is an analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution. It is ideal for low-frequency, high-precision measurement applications such as bridge sensors, where the signal bandwidth is narrow but accuracy is paramount. The AD7780 belongs to the family of sigma-delta ADCs, which are a subset of precision analog-to-digital converters used in industrial and instrumentation systems.
Key features include a 24-bit resolution, a maximum output data rate of 16.7 SPS, and a programmable gain of 1, 2, 4, 8, 16, 32, 64, or 128. The device also features a low noise PGA, an on-chip oscillator, and a 3-wire serial interface. The AD7780 operates from a 2.7V to 5.25V supply and consumes only 330 μA, making it ideal for battery-powered applications.
The AD7780 uses a sigma-delta architecture with a digital filter that provides 50 Hz and 60 Hz rejection. The device includes a temperature sensor and a bridge power-down switch, which can be used to conserve power. The AD7780 is specified over the -40°C to +105°C temperature range and is available in a 16-lead TSSOP package.
Typical applications include weigh scales, strain gage transducers, pressure sensors, and portable instrumentation. The low power consumption and high resolution make it suitable for battery-operated devices where power efficiency is critical.
When designing with the AD7780, ensure that the analog and digital supplies are properly decoupled and that the reference input is stable. The device requires an external reference voltage, which should be low-noise to achieve the specified performance.
بدائل مباشرة لـ AD7780BRUZ — 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 AD7780BRUZ (نفس عامل الشكل والبصمة) — يختلف في Resolution, Number of Channels, Sampling Rate, Power-Down Current, Package.
AD7781BRUZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←AD7799BRUZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←AD7798BRUZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←AD7793BRUZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←AD7792BRUZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←AD7780BRUZ-REEL
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
AD7780BRUZ الحدود القصوى والخصائص الكهربائية
| الدقة | 24 Bit |
| Number of Inputs | 1 |
| Input Type | Differential |
| Data Interface | 3-wire serial |
| معدل أخذ العينات | 16.7 SPS |
| Programmable Gain | 1, 2, 4, 8, 16, 32, 64, 128 |
| جهد التغذية | 2.7 V to 5.25 V |
| تيار التغذية | 330 µA |
| Architecture | Sigma-Delta |
| Reference Type | External |
| نطاق درجة حرارة التشغيل | -40°C to +105°C |
| العلبة | 16-TSSOP |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
| Number of Channels | 1 |
تكوين أطراف AD7780BRUZ
| دبوس 1 | SCLK — Serial clock input |
| دبوس 2 | CS — Chip select (active low) |
| دبوس 3 | DIN — Serial data input |
| دبوس 4 | DOUT — Serial data output |
| دبوس 5 | DVDD — Digital supply voltage |
| دبوس 6 | DGND — Digital ground |
| دبوس 7 | AVDD — Analog supply voltage |
| دبوس 8 | AGND — Analog ground |
| دبوس 9 | REFIN(+) — Positive reference input |
| دبوس 10 | REFIN(-) — Negative reference input |
| دبوس 11 | AIN(+) — Positive analog input |
| دبوس 12 | AIN(-) — Negative analog input |
| دبوس 13 | PDRST — Power-down reset |
| دبوس 14 | GAIN — Gain selection |
| دبوس 15 | NC — No connect |
| دبوس 16 | NC — No connect |
التطبيقات النموذجية
AD7780BRUZ مناسب لـ 6 التطبيقs: Weigh Scales, Strain Gage Transducers, Pressure Sensors, Portable Instrumentation, Temperature Measurement, Battery-Powered Systems.
Weigh Scales
The AD7780BRUZ is ideal for weigh scale applications due to its high resolution (24-bit) and low noise PGA. It directly interfaces with bridge sensors, providing accurate weight measurements. The low power consumption (330 µA) makes it suitable for battery-operated scales. The on-chip oscillator and 3-wire serial interface simplify system design, reducing component count and board space.
موصى به
Strain Gage Transducers
The AD7780BRUZ is designed for strain gage transducers, offering high precision and low noise. Its programmable gain amplifier (PGA) with gains up to 128 allows direct connection to low-level strain gage signals. The device's low power consumption is beneficial for portable or remote sensing applications. The sigma-delta architecture provides excellent noise rejection, ensuring accurate measurements in industrial environments.
موصى به
Pressure Sensors
The AD7780BRUZ is well-suited for pressure sensor applications, providing high-resolution conversion of bridge sensor outputs. Its low power consumption (330 µA) makes it ideal for battery-powered pressure transmitters. The on-chip oscillator and 3-wire serial interface simplify integration. The device's wide supply voltage range (2.7V to 5.25V) accommodates various system power rails.
موصى به
Portable Instrumentation
The AD7780BRUZ is perfect for portable instrumentation due to its ultra-low power consumption of 330 µA. It provides high-resolution 24-bit conversion for precise measurements in handheld devices. The small 16-TSSOP package saves board space, and the on-chip oscillator reduces external components. The device operates from a single 2.7V to 5.25V supply, making it compatible with battery-powered systems.
موصى به
Temperature Measurement
The AD7780BRUZ includes an on-chip temperature sensor, making it suitable for temperature measurement applications. It can directly digitize temperature sensor outputs with high resolution. The low power consumption is advantageous for battery-operated temperature loggers. The device's sigma-delta architecture provides stable and accurate readings over the -40°C to +105°C temperature range.
موصى به
Battery-Powered Systems
The AD7780BRUZ is specifically designed for battery-powered systems, consuming only 330 µA. Its low power consumption extends battery life in portable devices. The device includes a bridge power-down switch to further conserve power when not measuring. The wide supply voltage range and small package make it ideal for compact, energy-efficient designs.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ AD7780BRUZ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | AD7780BRZ | AD7781BRUZ | AD7799BRUZ | AD7798BRUZ | AD7793BRUZ | AD7792BRUZ |
|---|---|---|---|---|---|---|---|
| Package | 16-TSSOP | 16-SOIC | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Supply Voltage | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V |
| Supply Current | 330 µA | 330 µA | 330 µA | 400 µA | 400 µA | 400 µA | 400 µA |
| Data Rate | 16.7 SPS | 16.7 SPS | 16.7 SPS | 470 SPS | 470 SPS | 470 SPS | 470 SPS |
| Programmable Gain | 1, 2, 4, 8, 16, 32, 64, 128 | 1, 2, 4, 8, 16, 32, 64, 128 | 1, 2, 4, 8, 16, 32, 64, 128 | 1, 2, 4, 8, 16, 32, 64, 128 | 1, 2, 4, 8, 16, 32, 64, 128 | 1, 2, 4, 8, 16, 32, 64, 128 | 1, 2, 4, 8, 16, 32, 64, 128 |
| On-Chip Oscillator | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
أبرز الفروقات
- Ultra-low power consumption of 330 µA (مقابلAD7799BRUZ)
- Lower data rate for precision (مقابلAD7799BRUZ)
- On-chip oscillator (مقابلAD7780BRZ)
ملاحظات التصميم
Decouple the AVDD and DVDD pins with 0.1 µF and 10 µF capacitors placed close to the device. Use separate analog and digital ground planes to minimize noise coupling. The AD7780BRUZ consumes only 330 µA, but proper decoupling is essential for maintaining the specified 24-bit performance.
Place the external reference and input filter components close to the REFIN and AIN pins. Use a low-noise reference voltage source to achieve the specified performance. Keep the analog input traces short and shielded to reduce interference.
Ensure the reference voltage is stable and low-noise. The AD7780BRUZ requires an external reference; using a noisy reference will degrade the ADC's performance. Also, avoid exceeding the absolute maximum ratings on any pin, and ensure proper power-up sequencing.
معلومات الامتثال
RoHS compliant per Analog Devices product page. AEC-Q100 not applicable for this product.
