AD7190WBRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
MPN: AD7190WBRUZ ✓ فعالAD7190WBRUZ نمای کلی
A sigma-delta ADC is a converter that uses oversampling and noise shaping to achieve very high resolution. Unlike successive-approximation ADCs, sigma-delta converters sample the input many times and apply digital filtering, which moves quantization noise out of the signal band. This makes the AD7190WBRUZ well suited for low-frequency, high-accuracy measurements such as load cells, pressure sensors, temperature transducers, and precision process control loops. As an ADC, the device sits between the analog sensor and the digital processing core in a measurement system, converting tiny analog signals into serial digital words.
Key features include 24-bit no-missing-codes performance, a PGA with gain levels suitable for millivolt-level sensor outputs, and a low-noise sigma-delta architecture that minimizes error in precision bridges. The device also offers an internal clock option, simple SPI interface, and a serial read rate that supports real-time weight and pressure monitoring. The 24-lead TSSOP package is compact and facilitates dense PCB layouts.
Technically, the AD7190WBRUZ integrates a chopper-stabilized amplifier and a digital filter that can be configured for different output rates and settling times. It operates from an analog supply and supports external references, enabling ratiometric measurements. The ADC continuously converts at rates up to 4.8 kSPS, making it a practical choice for weigh scale controllers and industrial transmitters. Its digital interface is compatible with microcontrollers and DSPs through standard SPI commands.
Typical applications include industrial process control, high-precision weigh scales, medical monitoring equipment, and RTD/thermocouple temperature measurement. The device is also used in portable instrumentation where low power and high accuracy are required. For multi-channel systems, the input multiplexer allows configuration of two differential channels or four single-ended/pseudo-differential inputs.
Designers should pay attention to the analog reference and power supplies: use low-noise references and decouple AVDD with high-quality capacitors. The PGAs sensitivity to input offsets must be calibrated during system initialization. The AD7190WBRUZ supports a wide operating temperature range, making it suitable for harsh industrial environments. When pairing with a microcontroller, connect the SPI lines (SCLK, DIN, DOUT/RDY, CS) to a fast host port to take full advantage of the 4.8 kSPS throughput.
جایگزین‌های drop-in برای AD7190WBRUZ — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای AD7190WBRUZ (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Data Interface, Input Type, Sampling Rate.
AD7190BRUZ
برای قیمت تماس بگیرید
مشاهده دیتاشیت ←AD7190BRUZ-REEL
برای قیمت تماس بگیرید
مشاهده دیتاشیت ←AD7191BRUZ
📋 جایگزین مرجع (خارج از کاتالوگ)
AD7192BRUZ
برای قیمت تماس بگیرید
مشاهده دیتاشیت ←ADS1256IDB
📋 جایگزین مرجع (خارج از کاتالوگ)
AD7190WBRUZ حداکثر مقادیر مجاز و مشخصات الکتریکی
| رزولوشن | 24 Bit |
| Number of Channels | 2 Differential, 4 Pseudo-Differential |
| نرخ نمونه‌برداری | 4.8 kSPS |
| Input Type | Differential, Pseudo-Differential |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| Reference Type | External |
| Voltage - Supply, Analog | 5 V |
| Voltage - Supply, Digital | 2.7 V to 5.25 V |
| ویژگی‌ها | PGA |
| محدوده دمای کاری | -40°C to +105°C |
| بسته‌بندی / کیس | 24-TSSOP |
| نوع نصب | Surface Mount |
| Supplier Device Package | 24-TSSOP |
| Number of Bits | 24 |
| Number of Inputs | 2, 4 |
| Ratio - S/H:ADC | 0:1 |
| Number of A/D Converters | 1 |
| وضعیت RoHS | Compliant |
پیکربندی پین AD7190WBRUZ
| پین 1 | SCLK — Serial clock input |
| پین 2 | DIN — Serial data input |
| پین 3 | DOUT/RDY — Serial data output / ready |
| پین 4 | CS — Chip select |
| پین 5 | GND — Ground |
| پین 6 | AVDD — Analog power supply |
| پین 7 | AIN1+ — Analog input 1 positive |
| پین 8 | AIN1- — Analog input 1 negative |
| پین 9 | AIN2+ — Analog input 2 positive |
| پین 10 | AIN2- — Analog input 2 negative |
| پین 11 | REFIN1+ — Reference input 1 positive |
| پین 12 | REFIN1- — Reference input 1 negative |
| پین 13 | REFIN2+ — Reference input 2 positive |
| پین 14 | REFIN2- — Reference input 2 negative |
| پین 15 | P1 — Digital I/O pin |
| پین 16 | P2 — Digital I/O pin |
| پین 17 | SYNC — Synchronization input |
| پین 18 | RESET — Reset input |
| پین 19 | DVDD — Digital power supply |
| پین 20 | DGND — Digital ground |
| پین 21 | MCLK — Master clock input |
| پین 22 | MODE — Mode select |
| پین 23 | NC — No connect |
| پین 24 | NC — No connect |
کاربردهای معمول
AD7190WBRUZ مناسب است برای 6 کاربردs: Weigh Scale Systems, Industrial Process Control, Medical Monitoring Equipment, Temperature Measurement (RTD/Thermocouple), Portable Instrumentation, Precision Data Acquisition Systems.
Weigh Scale Systems
The AD7190WBRUZ is ideal for weigh scale systems due to its 24-bit resolution, low noise, and built-in PGA. It directly interfaces with load cells, providing high accuracy and stability. The device's 4.8 kSPS output rate supports real-time weight monitoring, while the SPI interface simplifies connection to microcontrollers. Its wide temperature range ensures reliable operation in industrial environments.
پیشنهادی
Industrial Process Control
In industrial process control, the AD7190WBRUZ provides high-resolution conversion of sensor signals such as pressure and temperature. Its sigma-delta architecture and PGA allow direct connection to transducers, reducing external components. The device's SPI interface enables easy integration with PLCs and microcontrollers, while its 4.8 kSPS rate is sufficient for most control loops. The wide operating temperature range makes it suitable for harsh factory environments.
پیشنهادی
Medical Monitoring Equipment
The AD7190WBRUZ is used in medical monitoring equipment for precise measurement of physiological signals. Its low noise and 24-bit resolution ensure accurate data acquisition, while the PGA accommodates small sensor outputs. The device's compact TSSOP package is suitable for portable devices. The SPI interface allows seamless data transfer to processing units, and the wide temperature range supports various clinical environments.
پیشنهادی
Temperature Measurement (RTD/Thermocouple)
The AD7190WBRUZ is well-suited for RTD and thermocouple temperature measurement. Its 24-bit resolution and low noise enable precise temperature readings, while the PGA amplifies small thermocouple voltages. The device supports ratiometric measurements with external references, improving accuracy. The SPI interface simplifies integration with microcontrollers, and the 4.8 kSPS rate allows fast temperature updates. Its wide temperature range ensures reliable operation in industrial settings.
پیشنهادی
Portable Instrumentation
The AD7190WBRUZ is ideal for portable instrumentation due to its low power consumption and compact TSSOP package. It provides high-resolution conversion for battery-powered devices, such as handheld multimeters and data loggers. The SPI interface allows efficient communication with low-power microcontrollers. The device's wide operating temperature range ensures reliable performance in various environments, and its PGA reduces the need for external amplification, saving board space and power.
پیشنهادی
Precision Data Acquisition Systems
The AD7190WBRUZ is a key component in precision data acquisition systems, offering 24-bit resolution and low noise for accurate signal digitization. Its sigma-delta architecture and PGA enable direct connection to various sensors, while the SPI interface facilitates integration with data acquisition boards. The device's 4.8 kSPS rate supports high-throughput measurements, and its wide temperature range makes it suitable for laboratory and industrial applications.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای AD7190WBRUZ — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | AD7190BRUZ | AD7190BRUZ-REEL | AD7191BRUZ | AD7192BRUZ | ADS1256IDB |
|---|---|---|---|---|---|---|
| Package | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Sampling Rate | 4.8 kSPS | 4.8 kSPS | 4.8 kSPS | 4.8 kSPS | 4.8 kSPS | 30 kSPS |
| Number of Channels | 2 Differential, 4 Pseudo-Differential | 2 Differential, 4 Pseudo-Differential | 2 Differential, 4 Pseudo-Differential | 2 Differential, 4 Pseudo-Differential | 2 Differential, 4 Pseudo-Differential | 8 Single-Ended, 4 Differential |
| Built-in PGA | Yes | Yes | Yes | Yes | Yes | Yes |
| Interface | SPI | SPI | SPI | SPI | SPI | SPI |
| Operating Temperature Range | -40°C to +105°C | -40°C to +85°C | -40°C to +85°C | -40°C to +105°C | -40°C to +105°C | -40°C to +85°C |
تفاوت‌های کلیدی
- Wide temperature range (-40°C to +105°C) (در مقابلAD7190BRUZ)
- Higher accuracy than AD7191 (در مقابلAD7191BRUZ)
- Lower noise than ADS1256 (در مقابلADS1256IDB)
یادداشت‌های طراحی
Decouple the AVDD pin with a 10 µF and 0.1 µF capacitor in parallel, placed as close to the pin as possible. Use a low-noise analog supply for AVDD to maintain the ADC's noise performance. The digital supply (DVDD) can be derived from a separate 3.3 V rail, but ensure proper isolation to prevent digital noise from coupling into the analog section.
Use a solid ground plane under the ADC and keep analog and digital grounds separate, connecting them at a single point. Route the SPI lines (SCLK, DIN, DOUT/RDY, CS) away from analog inputs to minimize crosstalk. Place the reference decoupling capacitors close to the REFIN pins to ensure stable reference voltage.
Ensure the reference voltage is stable and low-noise, as it directly affects conversion accuracy. Calibrate the PGA offset and gain during system initialization to compensate for input offsets. Avoid exceeding the absolute maximum ratings on the analog inputs, as this can damage the device. Use series resistors to limit input current if overvoltage is possible.
اطلاعات انطباق
RoHS compliant per Analog Devices product page. Other compliance information not specified in the provided data.
