AD4170BCPZ - 24-Bit Sigma-Delta ADC, 500kSPS | Analog Devices
MPN： AD4170BCPZ ✓ 啟用中AD4170BCPZ 概覽
A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution. It is widely used in precision measurement, industrial process control, and medical instrumentation where accuracy and low noise are critical. The AD4170BCPZ integrates a low-noise programmable gain amplifier (PGA) and a precision voltage reference, reducing external component count and simplifying system design.
Key features include a 24-bit resolution, 8 input channels (configurable as 4 differential or 8 single-ended), and a maximum output data rate of 500 kSPS. The device offers a low noise floor, enabling accurate measurement of small signals. It also includes a flexible digital filter, allowing users to trade off between speed and noise performance. The integrated PGA provides gain settings from 1 to 128, accommodating a wide range of sensor outputs.
The AD4170BCPZ operates from a 2.5V to 5.5V analog supply and a 1.8V to 5.5V digital interface supply, ensuring compatibility with modern microcontrollers and DSPs. It features a serial peripheral interface (SPI) for communication, supporting both 3-wire and 4-wire modes. The device also includes a reference detect function and a temperature sensor, enhancing its versatility in system monitoring applications.
Typical applications include precision weigh scales, strain gauge measurements, thermocouple and RTD temperature sensing, and industrial process control. The high output data rate and low noise make it ideal for vibration analysis and high-speed data acquisition systems. The device's integrated features reduce board space and bill of materials, making it a cost-effective solution for precision measurement.
When designing with the AD4170BCPZ, ensure proper decoupling of the analog and digital supplies to minimize noise coupling. The reference input should be bypassed with a low-ESR capacitor to maintain stability. The SPI interface should be isolated from noisy digital traces to preserve the ADC's noise performance.
直接替換替代品，適用於 AD4170BCPZ — 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： AD4170BCPZ （相同外形與佔位） — 差異在於 Package, Input Type, Sampling Rate, Resolution, Architecture.
AD4170-4BCPZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD4170-4BCPZ-RL7
✅ 直接替換📋 參考替代品（不在目錄中）
AD7175-8BCPZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證✗ 缺貨
$8.32 / 單位
查看資料表 →AD7172-2BRUZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證✗ 缺貨
$7.1 / 單位
查看資料表 →AD7384-4BCPZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD4170BCPZ 最大額定值與電氣特性
| 解析度 | 24 Bit |
| Number of Inputs | 8 |
| Input Type | Differential/Single-Ended |
| Data Interface | SPI |
| 取樣率 | 500 kSPS |
| Input Bandwidth | DC to 50 kHz |
| Output Data Rate | 7.6 SPS to 500 kSPS |
| Architecture | Sigma-Delta |
| Number of Converters | 1 |
| Analog Supply Voltage | 2.5V to 5.5V |
| Digital Supply Voltage | 1.8V to 5.5V |
| 封裝 | 32-LFCSP (4x6) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
AD4170BCPZ 腳位配置
| 腳位 1 | AVDD — Analog power supply |
| 腳位 2 | AVSS — Analog ground |
| 腳位 3 | REF+ — Positive reference input |
| 腳位 4 | REF- — Negative reference input |
| 腳位 5 | AIN0 — Analog input 0 |
| 腳位 6 | AIN1 — Analog input 1 |
| 腳位 7 | AIN2 — Analog input 2 |
| 腳位 8 | AIN3 — Analog input 3 |
| 腳位 9 | AIN4 — Analog input 4 |
| 腳位 10 | AIN5 — Analog input 5 |
| 腳位 11 | AIN6 — Analog input 6 |
| 腳位 12 | AIN7 — Analog input 7 |
| 腳位 13 | DVDD — Digital power supply |
| 腳位 14 | DVSS — Digital ground |
| 腳位 15 | SCLK — Serial clock input |
| 腳位 16 | DIN — Serial data input |
| 腳位 17 | DOUT — Serial data output |
| 腳位 18 | CS — Chip select |
| 腳位 19 | SYNC — Synchronization input |
| 腳位 20 | RESET — Reset input |
| 腳位 21 | GPIO0 — General purpose I/O |
| 腳位 22 | GPIO1 — General purpose I/O |
| 腳位 23 | GPIO2 — General purpose I/O |
| 腳位 24 | GPIO3 — General purpose I/O |
| 腳位 25 | TEMP — Temperature sensor output |
| 腳位 26 | VREF — Voltage reference output |
| 腳位 27 | CAP — Capacitor connection |
| 腳位 28 | NC — No connect |
| 腳位 29 | NC — No connect |
| 腳位 30 | NC — No connect |
| 腳位 31 | NC — No connect |
| 腳位 32 | EP — Exposed pad |
典型應用
AD4170BCPZ 適用於 6 應用s: Precision Weigh Scales, Industrial Process Control, Medical Instrumentation, Vibration Analysis, Temperature Sensing, Data Acquisition Systems.
Precision Weigh Scales
The AD4170BCPZ's 24-bit resolution and low noise make it ideal for precision weigh scales. Its high output data rate of up to 500 kSPS allows fast settling times, while the integrated PGA with gains up to 128 amplifies small load cell signals. The sigma-delta architecture provides excellent linearity, ensuring accurate weight measurements. The device's SPI interface simplifies connection to microcontrollers, and its compact LFCSP package saves board space. With proper filtering, the ADC can achieve high accuracy in industrial weighing applications.
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Industrial Process Control
In industrial process control, the AD4170BCPZ provides accurate measurement of temperature, pressure, and flow. Its wide input bandwidth and high resolution enable precise monitoring of process variables. The device's flexible digital filter allows trade-offs between speed and noise, adapting to different control loop requirements. The integrated temperature sensor aids in cold-junction compensation for thermocouples. The SPI interface and wide supply voltage range ensure compatibility with industrial microcontrollers. The AD4170BCPZ's robust design and low power consumption make it suitable for 24/7 operation in harsh environments.
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Medical Instrumentation
The AD4170BCPZ is well-suited for medical instrumentation such as patient monitoring and diagnostic equipment. Its low noise and high resolution ensure accurate measurement of physiological signals like ECG and EEG. The device's high input impedance and programmable gain accommodate various sensor types. The compact LFCSP package is ideal for portable medical devices. The SPI interface allows easy integration with medical-grade microcontrollers. The AD4170BCPZ's low power consumption extends battery life in wearable monitors. Its wide operating temperature range supports reliable operation in clinical environments.
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Vibration Analysis
The AD4170BCPZ's high output data rate of 500 kSPS makes it ideal for vibration analysis and condition monitoring. Its low noise floor allows detection of small vibration amplitudes. The device's sigma-delta architecture provides high dynamic range, capturing both low and high frequency components. The integrated PGA can amplify accelerometer signals for better resolution. The SPI interface enables high-speed data transfer to DSPs or FPGAs for real-time analysis. The compact package is suitable for embedded vibration sensors. The AD4170BCPZ's performance meets the requirements of predictive maintenance systems.
推薦
Temperature Sensing
The AD4170BCPZ is excellent for temperature sensing with thermocouples, RTDs, and thermistors. Its high resolution and low noise enable accurate temperature measurements over a wide range. The integrated PGA with gains up to 128 amplifies small sensor signals, improving resolution. The device includes a temperature sensor for cold-junction compensation in thermocouple applications. The flexible digital filter allows rejection of 50/60 Hz noise. The SPI interface simplifies connection to temperature controllers. The AD4170BCPZ's wide supply voltage range supports various system designs.
推薦
Data Acquisition Systems
The AD4170BCPZ is a versatile choice for general-purpose data acquisition systems. Its high speed and resolution make it suitable for capturing a wide range of signals. The device's 8 input channels can be configured as differential or single-ended, providing flexibility. The SPI interface supports high-speed data transfer to microcontrollers or FPGAs. The integrated PGA and reference reduce external components, simplifying design. The compact LFCSP package is ideal for multi-channel DAQ boards. The AD4170BCPZ's low power consumption is beneficial for portable data loggers.
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推薦產品摘要
工程參考資料，適用於 AD4170BCPZ — 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 | AD4170-4BCPZ | AD4170-4BCPZ-RL7 | AD7175-8BCPZ-RL7 | AD7172-2BRUZ-RL7 | AD7384-4BCPZ |
|---|---|---|---|---|---|---|
| Package | 32-LFCSP (4x6) | 32-LFCSP (4x6) | 32-LFCSP (4x6) | 32-LFCSP (4x6) | 32-LFCSP (4x6) | 32-LFCSP (4x6) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 16 Bit |
| Sampling Rate | 500 kSPS | 500 kSPS | 500 kSPS | 250 kSPS | 31.25 kSPS | 4 MSPS |
| Number of Inputs | 8 | 8 | 8 | 8 | 2 | 4 |
| Input Type | Differential/Single-Ended | Differential/Single-Ended | Differential/Single-Ended | Differential/Single-Ended | Differential/Single-Ended | Differential |
| Architecture | Sigma-Delta | Sigma-Delta | Sigma-Delta | Sigma-Delta | Sigma-Delta | SAR |
| Analog Supply Voltage | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 3.0V to 3.6V |
主要差異化特點
- Higher sampling rate than AD7172-2BRUZ-RL7 (對比AD7172-2BRUZ-RL7)
- More input channels than AD7384-4BCPZ (對比AD7384-4BCPZ)
- Higher resolution than AD7384-4BCPZ (對比AD7384-4BCPZ)
設計說明
Decouple the AVDD and DVDD pins with 10uF and 0.1uF capacitors placed as close to the pins as possible. Use separate analog and digital ground planes to minimize noise coupling. The AD4170BCPZ operates from 2.5V to 5.5V analog supply and 1.8V to 5.5V digital supply, so ensure proper voltage levels for your system.
For optimal performance, route the analog inputs away from digital traces and the SPI interface. Use a solid ground plane under the ADC and avoid cutting it with vias. The reference input should be bypassed with a low-ESR capacitor, such as a 10uF ceramic, to maintain stability and reduce noise.
Do not exceed the absolute maximum ratings for supply voltages. Ensure the reference voltage is stable and within the specified range. The SPI interface should be isolated from noisy digital traces to preserve the ADC's noise performance. Also, configure the digital filter appropriately to reject 50/60 Hz noise for industrial applications.
合規資訊
RoHS compliant per distributor listings. Other compliance data not specified in provided data.
