AD7190WBRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
MPN： AD7190WBRUZ ✓ 啟用中AD7190WBRUZ 概覽
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.
直接替換替代品，適用於 AD7190WBRUZ — 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： AD7190WBRUZ （相同外形與佔位） — 差異在於 Data Interface, Input Type, Sampling Rate.
AD7190BRUZ
聯絡詢價
查看資料表 →AD7190BRUZ-REEL
聯絡詢價
查看資料表 →AD7191BRUZ
📋 參考替代品（不在目錄中）
AD7192BRUZ
聯絡詢價
查看資料表 →ADS1256IDB
📋 參考替代品（不在目錄中）
AD7190WBRUZ 最大額定值與電氣特性
| 解析度 | 24 Bit |
| Number of Channels | 2 Differential, 4 Pseudo-Differential |
| 取樣率 | 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 |
| 功能特色 | PGA |
| 工作溫度範圍 | -40°C to +105°C |
| 封裝 / 外殼 | 24-TSSOP |
| 安裝類型 | 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 |
| RoHS 狀態 | Compliant |
AD7190WBRUZ 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 | REFIN1+ — Reference input 1 positive |
| 腳位 12 | REFIN1- — Reference input 1 negative |
| 腳位 13 | REFIN2+ — Reference input 2 positive |
| 腳位 14 | REFIN2- — Reference input 2 negative |
| 腳位 15 | P1 — Digital I/O pin |
| 腳位 16 | P2 — Digital I/O pin |
| 腳位 17 | SYNC — Synchronization input |
| 腳位 18 | RESET — Reset input |
| 腳位 19 | DVDD — Digital power supply |
| 腳位 20 | DGND — Digital ground |
| 腳位 21 | MCLK — Master clock input |
| 腳位 22 | MODE — Mode select |
| 腳位 23 | NC — No connect |
| 腳位 24 | NC — No connect |
典型應用
AD7190WBRUZ 適用於 6 應用s: 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.
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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.
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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.
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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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 AD7190WBRUZ — 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 | 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 |
主要差異化特點
- Wide temperature range (-40°C to +105°C) (對比AD7190BRUZ)
- Higher accuracy than AD7191 (對比AD7191BRUZ)
- Lower noise than ADS1256 (對比ADS1256IDB)
設計說明
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.
合規資訊
RoHS compliant per Analog Devices product page. Other compliance information not specified in the provided data.
