AD7175-2BRUZ - 24-Bit 250kSPS Sigma-Delta ADC | Analog Devices
MPN: AD7175-2BRUZ ✓ Hoạt độngAD7175-2BRUZ Tóm tắt
A sigma-delta ADC is an analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution, typically 16 to 32 bits, by trading speed for accuracy. It is ideal for low-bandwidth, high-precision measurement applications such as process control, weigh scales, and temperature monitoring. The sigma-delta architecture is part of the broader ADC family, which also includes successive approximation (SAR) and pipeline converters, each suited to different speed and resolution trade-offs.
Key features of the AD7175-2 include a maximum output data rate of 250 kSPS, 20 µs settling time, and true rail-to-rail input buffers. It offers a programmable digital filter with multiple options (sinc3, sinc4, sinc5, and FIR), allowing users to optimize for noise or speed. The device also includes an internal 2.5 V reference with low drift, or can accept an external reference. It provides a 2-wire or 4-wire serial interface (SPI) and supports daisy-chaining for multiple devices.
Technically, the AD7175-2 integrates key analog and digital signal conditioning blocks, allowing per-channel configuration of gain, filter, and reference. It features a 24-bit sigma-delta modulator with a 5th-order modulator, achieving excellent noise performance. The device includes a 50 Hz/60 Hz rejection mode for power line noise suppression, and a burnout current source for sensor diagnostics. It also offers a CRC error check on the SPI interface for robust data integrity.
Typical applications include process control, industrial automation, weigh scales, temperature and pressure measurement, and medical instrumentation. The AD7175-2 is also suitable for high-resolution data acquisition systems where fast settling and low noise are critical. Its fast settling time makes it ideal for multiplexed systems that require rapid channel scanning without sacrificing accuracy.
When designing with the AD7175-2, ensure proper decoupling of the AVDD and IOVDD supplies with 10 µF and 0.1 µF capacitors. The reference input should be bypassed with a 10 µF capacitor to ground. For best noise performance, use a low-noise external reference if the internal reference is not sufficient. The SPI interface should be kept short and shielded to avoid digital noise coupling into the analog inputs.
Bộ thay thế dễ dàng lắp đặt cho AD7175-2BRUZ — 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 AD7175-2BRUZ (cùng hình factor và footprint) — khác nhau ở Operating Temperature Range, Input Type, Number of Channels, Sampling Rate, Settling Time.
AD7175-2BRUZ-RL7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7176-2BRUZ
✅ Drop-In ⚠️ Thông số chưa được xác minh✗ Hết hàng
$9.5 / Đơn vị
Xem tài liệu →AD7172-2BRUZ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD7124-4BRUZ
✅ Drop-In✗ Hết hàng
$7.9545 / Đơn vị
Xem tài liệu →ADS127L01
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
AD7175-2BRUZ Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 24 bit |
| Number of Channels | 2, 4 Input |
| Input Type | Fully/Pseudo Differential |
| Data Interface | SPI |
| Tỷ lệ lấy mẫu | 250 kSPS |
| Settling Time | 20 µs |
| Supply Voltage - Analog | 2.5 V to 5.25 V |
| Supply Voltage - Digital | 2 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40°C to +105°C |
| Hộp | 24-TSSOP |
| Kiểu lắp đặt | Surface Mount |
| Internal Reference | 2.5 V, low noise, low drift |
| Digital Filter | sinc3, sinc4, sinc5, FIR |
| 50 Hz/60 Hz Rejection | Yes |
| CRC Error Check | Yes |
| Trạng thái RoHS | Compliant |
Cấu hình chân AD7175-2BRUZ
| Chân 1 | AVDD — Analog power supply |
| Chân 2 | AIN0 — Analog input 0 |
| Chân 3 | AIN1 — Analog input 1 |
| Chân 4 | AIN2 — Analog input 2 |
| Chân 5 | AIN3 — Analog input 3 |
| Chân 6 | REF+ — Positive reference input |
| Chân 7 | REF- — Negative reference input |
| Chân 8 | GND — Ground |
| Chân 9 | IOVDD — Digital I/O power supply |
| Chân 10 | SCLK — Serial clock input |
| Chân 11 | DIN — Serial data input |
| Chân 12 | DOUT — Serial data output |
| Chân 13 | CS — Chip select |
| Chân 14 | SYNC — Synchronization input |
| Chân 15 | GND — Ground |
| Chân 16 | AVDD — Analog power supply |
Ứng dụng tiêu biểu
AD7175-2BRUZ phù hợp cho 6 Áp dụngs: Process Control, Weigh Scales, Temperature Measurement, Medical Instrumentation, Data Acquisition Systems, Industrial Automation.
Process Control
The AD7175-2BRUZ is ideal for process control systems that require high-resolution, fast-settling measurements of multiple sensors. Its 24-bit resolution and 250 kSPS output data rate enable accurate monitoring of temperature, pressure, and flow in industrial automation. The 20 µs settling time allows rapid channel scanning, making it suitable for multiplexed inputs. The internal 2.5 V reference and true rail-to-rail buffers simplify sensor interfacing, while the 50 Hz/60 Hz rejection mode suppresses power line noise. With a wide operating temperature range of -40°C to +105°C, it operates reliably in harsh industrial environments.
Được đề xuất
Weigh Scales
The AD7175-2BRUZ excels in weigh scale applications due to its high resolution and fast settling time. The 24-bit sigma-delta ADC provides the precision needed for accurate weight measurement, while the 20 µs settling enables fast updates for dynamic weighing. The true rail-to-rail input buffers allow direct connection to load cells without additional signal conditioning. The internal reference reduces external component count, and the programmable digital filter can be optimized for noise performance. The device's low noise and high linearity ensure consistent, repeatable measurements in industrial and commercial scales.
Được đề xuất
Temperature Measurement
For temperature measurement, the AD7175-2BRUZ provides high-resolution conversion of thermocouple and RTD signals. Its 24-bit resolution and low noise ensure accurate temperature readings, while the fast settling time allows rapid scanning of multiple temperature sensors. The device supports external references for ratiometric measurements, improving accuracy. The 50 Hz/60 Hz rejection mode is particularly useful in industrial environments with power line interference. The wide operating temperature range and robust design make it suitable for both laboratory and field applications.
Được đề xuất
Medical Instrumentation
The AD7175-2BRUZ is well-suited for medical instrumentation such as patient monitoring and diagnostic equipment. Its high resolution and low noise are critical for accurate biopotential measurements, while the fast settling time enables real-time data acquisition. The device's small 24-TSSOP package saves board space in compact medical devices. The SPI interface allows easy integration with microcontrollers, and the CRC error check ensures data integrity. The wide supply voltage range accommodates various power architectures, and the -40°C to +105°C temperature range covers clinical environments.
Được đề xuất
Data Acquisition Systems
In high-resolution data acquisition systems, the AD7175-2BRUZ offers the speed and precision needed for capturing fast-changing signals. Its 250 kSPS output data rate and 20 µs settling time allow multiplexing of multiple channels without sacrificing accuracy. The programmable digital filter lets designers trade off noise and speed. The device's true rail-to-rail buffers simplify interfacing to sensors, and the internal reference reduces external components. The SPI interface supports daisy-chaining for multi-device systems, making it ideal for scalable DAQ platforms.
Được đề xuất
Industrial Automation
The AD7175-2BRUZ is a key component in industrial automation for precise measurement and control. Its fast settling time and high resolution enable accurate monitoring of process variables such as pressure, level, and flow. The device's robust design operates reliably in harsh environments with wide temperature ranges. The 50 Hz/60 Hz rejection mode minimizes interference from power lines, and the burnout current source aids sensor diagnostics. The SPI interface allows easy integration with PLCs and industrial controllers, making it a versatile choice for factory automation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7175-2BRUZ — 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 | AD7175-2BRUZ-RL7 | AD7176-2BRUZ | AD7172-2BRUZ | AD7124-4BRUZ | ADS127L01 |
|---|---|---|---|---|---|---|
| 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 |
| Max Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 19.2 kSPS | 400 kSPS |
| Settling Time | 20 µs | 20 µs | 20 µs | 20 µs | 52 µs | 10 µs |
| Input Type | Fully/Pseudo Differential | Fully/Pseudo Differential | Fully/Pseudo Differential | Fully/Pseudo Differential | Fully/Pseudo Differential | Differential |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V | No |
| Supply Voltage (Analog) | 2.5 V to 5.25 V | 2.5 V to 5.25 V | 2.5 V to 5.25 V | 2.5 V to 5.25 V | 2.9 V to 3.6 V | 1.8 V to 3.3 V |
Bảo phân biệt quan trọng
- Fast settling time of 20 µs (vsAD7124-4BRUZ)
- Higher maximum output data rate (vsAD7172-2BRUZ)
- Internal 2.5 V reference (vsADS127L01)
Ghi chú thiết kế
Decouple the AVDD and IOVDD supplies with 10 µF and 0.1 µF capacitors placed close to the pins. Use a low-impedance ground plane to minimize noise. The analog and digital supplies should be separated to prevent digital switching noise from coupling into the analog circuitry.
For optimal noise performance, use a solid ground plane under the ADC and keep the analog input traces short and shielded. Bypass the reference input with a 10 µF capacitor to ground. Avoid routing digital signals near the analog inputs to prevent crosstalk.
Ensure the reference voltage is stable and low-noise. If using the internal reference, place a 10 µF decoupling capacitor on the REFOUT pin. For external reference, use a precision reference like the ADR4525. Also, configure the digital filter correctly to achieve the desired settling time and noise performance.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. AEC-Q100 not applicable for this industrial ADC.
