AD7190WBRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
料号： AD7190WBRUZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $60 | $60.00 |
| 10 | $43.3333 | $433.33 |
| 100 | $38.3333 | $3,833.33 |
| 500 | $36.6667 | $18,333.35 |
| 1,000 | $35 | $35,000.00 |
AD7190WBRUZ 概述
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.
直接替换替代料： AD7190WBRUZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AD7190WBRUZ （相同外形与封装尺寸） ——差异在于 Data Interface, Input Type, Sampling Rate.
快速对比工具——选择替代料号进行并排对比：
AD7190BRUZ
✓ 有现货
$7.6364 / 个
查看数据手册 →AD7190BRUZ-REEL
✓ 有现货
$6.5 / 个
查看数据手册 →AD7191BRUZ
📋 参考替代料（不在目录中）
AD7192BRUZ
📋 参考替代料（不在目录中）
ADS1256IDB
📋 参考替代料（不在目录中）
AD7190WBRUZ 最大额定值与电气特性
| 分辨率 | 24 Bit |
| Number of Channels | 2 Differential, 4 Pseudo-Differential |
| 采样率 | 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 |
| 特性 | PGA |
| 工作温度范围 | -40°C to +105°C |
| 封装 / 外壳 | 24-TSSOP |
| 安装类型 | 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 状态 | Compliant |
AD7190WBRUZ 引脚配置
| 引脚 1 | SCLK — Serial clock input |
| 引脚 2 | DIN — Serial data input |
| 引脚 3 | DOUT/RDY — Serial data output / ready |
| 引脚 4 | CS — Chip select |
| 引脚 5 | GND — Ground |
| 引脚 6 | AVDD — Analog power supply |
| 引脚 7 | AIN1+ — Analog input 1 positive |
| 引脚 8 | AIN1- — Analog input 1 negative |
| 引脚 9 | AIN2+ — Analog input 2 positive |
| 引脚 10 | AIN2- — Analog input 2 negative |
| 引脚 11 | REFIN1+ — Reference input 1 positive |
| 引脚 12 | REFIN1- — Reference input 1 negative |
| 引脚 13 | REFIN2+ — Reference input 2 positive |
| 引脚 14 | REFIN2- — Reference input 2 negative |
| 引脚 15 | P1 — Digital I/O pin |
| 引脚 16 | P2 — Digital I/O pin |
| 引脚 17 | SYNC — Synchronization input |
| 引脚 18 | RESET — Reset input |
| 引脚 19 | DVDD — Digital power supply |
| 引脚 20 | DGND — Digital ground |
| 引脚 21 | MCLK — Master clock input |
| 引脚 22 | MODE — Mode select |
| 引脚 23 | NC — No connect |
| 引脚 24 | NC — No connect |
典型应用
AD7190WBRUZ 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： AD7190WBRUZ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Wide temperature range (-40°C to +105°C) （对比 AD7190BRUZ)
- Higher accuracy than AD7191 （对比 AD7191BRUZ)
- Lower noise than ADS1256 （对比 ADS1256IDB)
设计说明
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.
合规信息
RoHS compliant per Analog Devices product page. Other compliance information not specified in the provided data.
