AD7175-2BRUZ - 24-Bit 250kSPS Sigma-Delta ADC | Analog Devices
MPN： AD7175-2BRUZ ✓ 啟用中AD7175-2BRUZ 概覽
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.
直接替換替代品，適用於 AD7175-2BRUZ — 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： AD7175-2BRUZ （相同外形與佔位） — 差異在於 Operating Temperature Range, Input Type, Number of Channels, Sampling Rate, Settling Time.
AD7175-2BRUZ-RL7
✅ 直接替換聯絡詢價
查看資料表 →AD7176-2BRUZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD7172-2BRUZ
✅ 直接替換聯絡詢價
查看資料表 →AD7124-4BRUZ
✅ 直接替換聯絡詢價
查看資料表 →ADS127L01
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD7175-2BRUZ 最大額定值與電氣特性
| 解析度 | 24 bit |
| Number of Channels | 2, 4 Input |
| Input Type | Fully/Pseudo Differential |
| Data Interface | SPI |
| 取樣率 | 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 |
| 工作溫度範圍 | -40°C to +105°C |
| 封裝 | 24-TSSOP |
| 安裝類型 | 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 |
| RoHS 狀態 | Compliant |
AD7175-2BRUZ 腳位配置
| 腳位 1 | AVDD — Analog power supply |
| 腳位 2 | AIN0 — Analog input 0 |
| 腳位 3 | AIN1 — Analog input 1 |
| 腳位 4 | AIN2 — Analog input 2 |
| 腳位 5 | AIN3 — Analog input 3 |
| 腳位 6 | REF+ — Positive reference input |
| 腳位 7 | REF- — Negative reference input |
| 腳位 8 | GND — Ground |
| 腳位 9 | IOVDD — Digital I/O power supply |
| 腳位 10 | SCLK — Serial clock input |
| 腳位 11 | DIN — Serial data input |
| 腳位 12 | DOUT — Serial data output |
| 腳位 13 | CS — Chip select |
| 腳位 14 | SYNC — Synchronization input |
| 腳位 15 | GND — Ground |
| 腳位 16 | AVDD — Analog power supply |
典型應用
AD7175-2BRUZ 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 AD7175-2BRUZ — 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 | 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 |
主要差異化特點
- Fast settling time of 20 µs (對比AD7124-4BRUZ)
- Higher maximum output data rate (對比AD7172-2BRUZ)
- Internal 2.5 V reference (對比ADS127L01)
設計說明
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.
合規資訊
RoHS compliant per Analog Devices product page. AEC-Q100 not applicable for this industrial ADC.
