AD7190BRUZ-REEL - 24-Bit Sigma-Delta ADC with PGA | Analog Devices
MPN: AD7190BRUZ-REEL ✓ Hoạt độngAD7190BRUZ-REEL Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho AD7190BRUZ-REEL — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AD7190BRUZ-REEL (cùng hình factor và footprint) — khác nhau ở Input Type, Number of Channels, Package, Sampling Rate, Analog Supply Voltage.
AD7190BRUZ
✅ Drop-In✗ Hết hàng
$7.6364 / Đơn vị
Xem tài liệu →AD7190WBRUZ
✅ Drop-In✗ Hết hàng
$35 / Đơn vị
Xem tài liệu →AD7190WBRUZ-RL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7192BRUZ
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →AD7175-2BRUZ-RL7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7190BRUZ-REEL Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 24 Bit |
| Number of Input Channels | 2 Differential / 4 Pseudo-Differential |
| Tỷ lệ lấy mẫu | 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 |
| Hộp | 24-TSSOP |
| Khoảng nhiệt độ hoạt động | -40°C to +105°C |
| Automotive Qualified | Yes |
Cấu hình chân AD7190BRUZ-REEL
| Chân 1 | SCLK — Serial clock input |
| Chân 2 | CS — Chip select (active low) |
| Chân 3 | DIN — Serial data input |
| Chân 4 | DOUT — Serial data output |
| Chân 5 | DVDD — Digital supply voltage |
| Chân 6 | DGND — Digital ground |
| Chân 7 | AVDD — Analog supply voltage |
| Chân 8 | AGND — Analog ground |
| Chân 9 | REF+ — Positive reference input |
| Chân 10 | REF- — Negative reference input |
| Chân 11 | AIN1 — Analog input 1 |
| Chân 12 | AIN2 — Analog input 2 |
| Chân 13 | AIN3 — Analog input 3 |
| Chân 14 | AIN4 — Analog input 4 |
Ứng dụng tiêu biểu
AD7190BRUZ-REEL phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7190BRUZ-REEL — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Ultralow noise performance (vsAD7192BRUZ)
- Automotive qualification (vsAD7190BRUZ)
- Tape and reel packaging (vsAD7190BRUZ)
Ghi chú thiết kế
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.
Thông tin tuân thủ
Automotive qualified per datasheet. RoHS compliant per Analog Devices.
