AD7190BRUZ-REEL - 24-Bit Sigma-Delta ADC with PGA | Analog Devices
MPN： AD7190BRUZ-REEL ✓ 啟用中AD7190BRUZ-REEL 概覽
A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution. The AD7190 is a 24-bit sigma-delta ADC, which means it can resolve very small voltage changes, making it ideal for precision measurement applications such as weigh scales, pressure sensors, and temperature measurement. The on-chip PGA allows small amplitude signals to be amplified before conversion, improving the effective resolution for low-level signals.
Key features of the AD7190BRUZ-REEL include RMS noise of 4.7 Hz at gain 128, 16 noise-free bits at 2.4 kHz (gain to 22.5 noise-free bits at gain = 1), offset drift of 5 nV/°C, and gain drift of 1 ppm/°C. The device supports 2 differential or 4 pseudo-differential input channels, and it includes an automatic channel sequencer. The output data rate can be varied from 4.7 Hz to 4.8 kHz, and the on-chip 4.92 MHz clock can be used as the clock source or an external clock or crystal can be used.
The AD7190BRUZ-REEL features a 3-wire serial SPI interface that is compatible with QSPI, MICROWIRE, and DSP. It includes a Schmitt trigger on SCLK for improved noise immunity. The device is qualified for automotive applications, making it suitable for harsh environments. The low noise and high resolution make it ideal for precision measurement systems.
Typical applications include weigh scales, strain gauge transducers, pressure sensors, temperature measurement, and industrial process control. The AD7190BRUZ-REEL is also suitable for medical instrumentation and scientific instruments where high accuracy is required.
When designing with the AD7190BRUZ-REEL, it is important to provide a clean analog supply and proper decoupling. The reference input should be bypassed with a capacitor to reduce noise. The SPI interface should be isolated from noisy digital circuits to maintain the high resolution of the ADC.
直接替換替代品，適用於 AD7190BRUZ-REEL — 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： AD7190BRUZ-REEL （相同外形與佔位） — 差異在於 Input Type, Number of Channels, Package, Sampling Rate, Analog Supply Voltage.
AD7190BRUZ
✅ 直接替換聯絡詢價
查看資料表 →AD7190WBRUZ
✅ 直接替換聯絡詢價
查看資料表 →AD7190WBRUZ-RL
✅ 直接替換📋 參考替代品（不在目錄中）
AD7192BRUZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD7175-2BRUZ-RL7
✅ 直接替換聯絡詢價
查看資料表 →AD7190BRUZ-REEL 最大額定值與電氣特性
| 解析度 | 24 Bit |
| Number of Input Channels | 2 Differential / 4 Pseudo-Differential |
| 取樣率 | 4.8 kHz |
| Input Type | Differential / Pseudo-Differential |
| Data Interface | SPI, QSPI, MICROWIRE, DSP |
| Architecture | Sigma-Delta |
| Reference Type | External |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 2.7 V to 5.25 V |
| RMS Noise | 4.7 Hz at gain 128 |
| Noise-Free Bits | 16 bits @ 2.4 kHz (gain to 22.5 bits @ gain = 1) |
| Offset Drift | 5 nV/°C |
| Gain Drift | 1 ppm/°C |
| 封裝 | 24-TSSOP |
| 工作溫度範圍 | -40°C to +105°C |
| Automotive Qualified | Yes |
AD7190BRUZ-REEL 腳位配置
| 腳位 1 | SCLK — Serial clock input |
| 腳位 2 | CS — Chip select (active low) |
| 腳位 3 | DIN — Serial data input |
| 腳位 4 | DOUT — Serial data output |
| 腳位 5 | DVDD — Digital supply voltage |
| 腳位 6 | DGND — Digital ground |
| 腳位 7 | AVDD — Analog supply voltage |
| 腳位 8 | AGND — Analog ground |
| 腳位 9 | REF+ — Positive reference input |
| 腳位 10 | REF- — Negative reference input |
| 腳位 11 | AIN1 — Analog input 1 |
| 腳位 12 | AIN2 — Analog input 2 |
| 腳位 13 | AIN3 — Analog input 3 |
| 腳位 14 | AIN4 — Analog input 4 |
典型應用
AD7190BRUZ-REEL 適用於 6 應用s: Weigh Scales, Pressure Sensors, Temperature Measurement, Industrial Process Control, Medical Instrumentation, Scientific Instruments.
Weigh Scales
The AD7190BRUZ-REEL is ideal for weigh scales due to its ultralow noise and high resolution. With 22.5 noise-free bits at gain=1 and low offset drift, it can accurately measure small voltage changes from load cells. The on-chip PGA allows direct connection to strain gauge bridges, simplifying the analog front end. The device's 4.7 Hz output data rate is sufficient for static weight measurements, and the automatic channel sequencer enables multi-channel load cell arrays.
推薦
Pressure Sensors
The AD7190BRUZ-REEL is well-suited for pressure sensor applications, providing high accuracy and low noise for bridge-type sensors. Its 24-bit resolution and PGA allow direct connection to piezoresistive pressure sensors, amplifying small signals without external amplification. The device's low offset drift (5 nV/°C) ensures stable measurements over temperature, critical for industrial pressure transmitters. The SPI interface simplifies data transfer to microcontrollers.
推薦
Temperature Measurement
The AD7190BRUZ-REEL is excellent for temperature measurement with thermocouples and RTDs. Its high resolution and low noise enable precise temperature readings, and the PGA allows direct connection to low-level thermocouple signals. The device's 4.7 Hz to 4.8 kHz output data rate accommodates both slow and fast temperature monitoring. The on-chip channel sequencer can handle multiple temperature sensors, reducing external multiplexing.
推薦
Industrial Process Control
The AD7190BRUZ-REEL is designed for industrial process control, offering high accuracy and robustness. Its automotive qualification ensures reliable operation in harsh environments. The device's low noise and high resolution are essential for precise control loops, and the SPI interface allows easy integration with PLCs and microcontrollers. The wide supply voltage range and internal clock simplify system design.
推薦
Medical Instrumentation
The AD7190BRUZ-REEL is suitable for medical instrumentation such as patient monitoring and diagnostic equipment. Its ultralow noise and high resolution are critical for accurate biological signal measurement. The device's low power consumption and small TSSOP package make it ideal for portable devices. The SPI interface enables seamless data transfer to medical-grade microcontrollers.
推薦
Scientific Instruments
The AD7190BRUZ-REEL is ideal for scientific instruments requiring high precision, such as spectrometers and data acquisition systems. Its 24-bit resolution and low noise ensure accurate measurements of small signals. The device's programmable gain amplifier allows adaptation to various sensor outputs, and the SPI interface supports high-speed data transfer. The automotive qualification ensures reliability in demanding laboratory environments.
推薦
推薦產品摘要
工程參考資料，適用於 AD7190BRUZ-REEL — 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 | AD7190WBRUZ | AD7192BRUZ | AD7175-2BRUZ |
|---|---|---|---|---|---|
| Package | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Max Output Data Rate | 4.8 kHz | 4.8 kHz | 4.8 kHz | 4.8 kHz | 250 kSPS |
| Automotive Qualified | Yes | No | Yes | No | No |
| Input 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 |
| Supply Voltage (Analog) | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
主要差異化特點
- Ultralow noise performance (對比AD7192BRUZ)
- Automotive qualification (對比AD7190BRUZ)
- Tape and reel packaging (對比AD7190BRUZ)
設計說明
Provide a clean analog supply (AVDD) and digital supply (DVDD) with proper decoupling. Use 10uF and 0.1uF capacitors close to the AVDD and DVDD pins. The analog supply should be isolated from digital noise to maintain the ADC's high resolution.
Place the reference input bypass capacitor (0.1uF) close to the REF+ and REF- pins. Use a star-ground topology to separate analog and digital grounds. Keep the SPI lines away from analog input traces to prevent noise coupling.
Ensure the reference voltage is stable and low-noise. Use a precision reference like the ADR4520. Avoid exceeding the absolute maximum ratings on the analog inputs. The SPI interface should be operated at appropriate logic levels to prevent latch-up.
合規資訊
Automotive qualified per datasheet. RoHS compliant per Analog Devices.
