AD7124-4BBCPZ-RL7 - 24-Bit Sigma-Delta ADC | Analog Devices
料号： AD7124-4BBCPZ-RL7 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $49.0909 | $49.09 |
| 10 | $35.4545 | $354.55 |
| 100 | $31.3636 | $3,136.36 |
| 500 | $30 | $15,000.00 |
| 1,000 | $28.6364 | $28,636.40 |
AD7124-4BBCPZ-RL7 概述
A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution, typically 16 to 24 bits. It is widely used in precision measurement applications where low noise and high accuracy are critical, such as temperature sensing, pressure measurement, and process control. The AD7124-4 belongs to the ADC family, specifically the precision sigma-delta ADC category, which is part of the broader data converter and analog front-end hierarchy.
Key features of the AD7124-4BBCPZ-RL7 include a programmable gain amplifier (PGA) with gains from 1 to 128, a precision low drift internal band gap reference, and an external differential reference that can be internally buffered. The device offers three power modes (low, mid, and full) to optimize power consumption versus noise performance, with a typical current consumption of 350 µA in low power mode. It also includes a 50 Hz/60 Hz rejection filter, a 24-bit resolution, and an SPI-compatible serial interface.
The AD7124-4 integrates a complete signal chain, including a multiplexer, PGA, sigma-delta modulator, digital filter, and reference, reducing external component count and simplifying design. The device supports both internal and external references, and its digital filter provides programmable output data rates and settling times. The ADC is designed for high precision measurement applications, offering excellent noise performance with a typical RMS noise of 1.5 µV at a gain of 128 and an output data rate of 25 SPS.
Typical applications include smart transmitters, process control input modules, temperature and pressure measurement, and low power or battery-operated instrumentation. The AD7124-4 is also suitable for weigh scales, strain gauge sensors, and thermocouple or RTD measurements. Its low power consumption and high resolution make it ideal for portable and remote sensing applications.
When designing with the AD7124-4, it is important to provide adequate decoupling on the AVDD and DVDD supplies and to place the reference decoupling capacitor close to the REFIN pins. The device's power mode should be selected based on the required noise performance and power budget, as higher power modes offer lower noise but increased current consumption.
直接替换替代料： AD7124-4BBCPZ-RL7 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AD7124-4BBCPZ-RL7 （相同外形与封装尺寸） ——差异在于 Digital Supply Voltage, Internal Reference, Operating Temperature Range, Package, Resolution.
快速对比工具——选择替代料号进行并排对比：
AD7124-4BCPZ-RL7
📋 参考替代料（不在目录中）
AD7124-4BBCPZ
📋 参考替代料（不在目录中）
AD7124-4BCPZ
📋 参考替代料（不在目录中）
AD7124-8BCPZ-RL7
✓ 有现货
$8.85 / 个
查看数据手册 →ADS124S08IPBSR
📋 参考替代料（不在目录中）
AD7124-4BBCPZ-RL7 最大额定值与电气特性
| 分辨率 | 24 bit |
| Number of Channels | 4 differential or 7 single-ended/pseudo differential |
| Input Type | Differential, Single-Ended, Pseudo-Differential |
| Data Interface | SPI |
| Sampling Rate (Max) | 19.2 kSPS |
| Analog Supply Voltage | 2.7 V to 3.6 V |
| Digital Supply Voltage | 1.8 V to 3.6 V |
| PGA Gain | 1 to 128 |
| Internal Reference | Precision low drift band gap |
| Power Modes | Low, Mid, Full |
| Typical Current (Low Power Mode) | 350 µA |
| RMS Noise (Gain=128, 25 SPS) | 1.5 µV |
| 封装 | 32-LFCSP (5x5 mm) |
| 工作温度范围 | -40°C to +105°C |
| RoHS 状态 | Compliant |
AD7124-4BBCPZ-RL7 引脚配置
| 引脚 1 | AVDD — Analog power supply |
| 引脚 2 | AIN0 — Analog input 0 |
| 引脚 3 | AIN1 — Analog input 1 |
| 引脚 4 | AIN2 — Analog input 2 |
| 引脚 5 | AIN3 — Analog input 3 |
| 引脚 6 | AVSS — Analog ground |
| 引脚 7 | REFIN1(+) — External reference positive input |
| 引脚 8 | REFIN1(-) — External reference negative input |
| 引脚 9 | DVDD — Digital power supply |
| 引脚 10 | DGND — Digital ground |
| 引脚 11 | SCLK — Serial clock input |
| 引脚 12 | DIN — Serial data input |
| 引脚 13 | DOUT — Serial data output |
| 引脚 14 | CS — Chip select |
| 引脚 15 | SYNC — Synchronization input |
| 引脚 16 | P0 — General-purpose digital I/O |
典型应用
AD7124-4BBCPZ-RL7 适用于 6 应用s: Smart Transmitters, Process Control Input Modules, Temperature and Pressure Measurement, Weigh Scales and Strain Gauge Sensors, Low Power or Battery-Operated Instrumentation, Thermocouple and RTD Measurements.
Smart Transmitters
The AD7124-4BBCPZ-RL7 is ideal for smart transmitters in industrial process control, where it converts sensor signals (temperature, pressure, flow) with high accuracy. Its low power consumption (350 µA in low power mode) and 24-bit resolution enable precise measurement over 4-20 mA loops. The integrated PGA and reference reduce external components, simplifying design. The device's 50 Hz/60 Hz rejection filter ensures stable readings in noisy industrial environments, and its SPI interface allows easy integration with microcontrollers.
推荐
Process Control Input Modules
In process control input modules, the AD7124-4BBCPZ-RL7 provides high-resolution conversion of analog signals from sensors like RTDs, thermocouples, and strain gauges. Its programmable gain amplifier (PGA) with gains up to 128 allows direct connection of low-level sensor outputs without external amplification. The device's three power modes let designers balance noise performance against power budget, crucial for multi-channel modules. The integrated reference and digital filter simplify design, while the extended temperature range (-40°C to +105°C) ensures reliability in harsh industrial environments.
推荐
Temperature and Pressure Measurement
The AD7124-4BBCPZ-RL7 excels in temperature and pressure measurement systems, offering 24-bit resolution and low noise (1.5 µV RMS at gain 128, 25 SPS). It directly interfaces with thermocouples, RTDs, and pressure sensors, with the PGA amplifying small signals. The internal reference provides a stable voltage for ratiometric measurements, reducing external component count. Its low power consumption makes it suitable for battery-powered field instruments, and the SPI interface allows easy data transfer to a host processor.
推荐
Weigh Scales and Strain Gauge Sensors
For weigh scales and strain gauge applications, the AD7124-4BBCPZ-RL7 provides the high resolution and low noise required for accurate weight measurement. Its PGA with gains up to 128 amplifies the small differential output of a load cell, while the 24-bit sigma-delta ADC ensures precise conversion. The device's internal reference and 50 Hz/60 Hz rejection filter help reject power line interference, common in industrial settings. The low power modes enable battery-operated portable scales, and the compact 32-LFCSP package fits space-constrained designs.
推荐
Low Power or Battery-Operated Instrumentation
The AD7124-4BBCPZ-RL7 is designed for low power or battery-operated instrumentation, with a typical current consumption of 350 µA in low power mode. This makes it ideal for portable data loggers, wireless sensors, and handheld meters. The device's three power modes allow designers to optimize power versus noise performance, extending battery life. The integrated signal chain (mux, PGA, ADC, reference) reduces external components, saving board space and power. The SPI interface and wide digital supply range (1.8V to 3.6V) enable direct connection to low-power microcontrollers.
推荐
Thermocouple and RTD Measurements
The AD7124-4BBCPZ-RL7 is well-suited for thermocouple and RTD measurements, offering high accuracy and low noise. Its PGA amplifies the small voltages from thermocouples, while the internal reference provides a stable voltage for RTD excitation. The device's 24-bit resolution and programmable output data rate allow precise temperature readings. The 50 Hz/60 Hz rejection filter minimizes power line interference, and the extended temperature range ensures reliable operation in industrial environments. The SPI interface simplifies connection to a host processor for cold-junction compensation and linearization.
推荐
推荐产品汇总
工程参考数据： AD7124-4BBCPZ-RL7 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | AD7124-4BCPZ-RL7 | AD7124-4BBCPZ | AD7124-8BCPZ-RL7 | ADS124S08IPBSR |
|---|---|---|---|---|---|
| Package | 32-LFCSP (5x5 mm) | 32-LFCSP (5x5 mm) - same | 32-LFCSP (5x5 mm) - same | 32-LFCSP (5x5 mm) - same | 32-LFCSP (5x5 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Number of Inputs | 4 differential or 7 single-ended | 4 differential or 7 single-ended | 4 differential or 7 single-ended | 8 differential or 15 single-ended | 8 differential or 15 single-ended |
| Max Data Rate | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 4 kSPS |
| PGA Gain | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 |
| Temperature Range | -40°C to +105°C | -40°C to +85°C | -40°C to +105°C | -40°C to +105°C | -40°C to +125°C |
| Interface | SPI | SPI | SPI | SPI | SPI |
关键差异点
- Extended temperature range up to +105°C （对比 AD7124-4BCPZ-RL7)
- Tape and reel packaging for automated assembly （对比 AD7124-4BBCPZ)
- Lower power consumption in low power mode （对比 ADS124S08IPBSR)
设计说明
Provide adequate decoupling on AVDD and DVDD supplies. Place 0.1 µF and 10 µF capacitors close to the AVDD and DVDD pins. The analog and digital supplies should be separated to minimize noise coupling. Use a low-noise LDO like the ADP150 for the analog supply to maintain the ADC's noise performance.
Place the reference decoupling capacitor close to the REFIN pins. Use a 10 µF capacitor for the internal reference output (REFOUT) and a 0.1 µF capacitor for the REFIN pins. Keep analog input traces short and shielded to reduce noise pickup. A solid ground plane under the ADC is recommended.
Select the appropriate power mode based on the required noise performance and power budget. Higher power modes offer lower noise but increase current consumption. Ensure the input common-mode voltage is within the specified range for the PGA. Do not exceed the absolute maximum ratings on any pin.
合规信息
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. REACH compliance assumed based on ADI policy.
