AD7124-4BRUZ-RL - 24-Bit Sigma-Delta ADC | Analog Devices
부품 번호: AD7124-4BRUZ-RL ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $13.6364 | $13.64 |
| 10 | $9.8485 | $98.49 |
| 100 | $8.7121 | $871.21 |
| 500 | $8.3333 | $4,166.65 |
| 1,000 | $7.9545 | $7,954.50 |
AD7124-4BRUZ-RL 개요
An analog-to-digital converter (ADC) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal. The AD7124-4 is a sigma-delta ADC, which uses oversampling and noise shaping to achieve high resolution and excellent noise performance. It is part of the broader category of data acquisition systems, which are essential in bridging the analog world to digital processing. The AD7124-4 integrates a programmable gain amplifier (PGA), a precision voltage reference, and a temperature sensor, reducing the need for external components and simplifying the signal chain.
Key features of the AD7124-4 include a 24-bit resolution, a maximum output data rate of 19.2 kSPS, and a root mean square (RMS) noise of 1.8 uV at a gain of 128 and an output data rate of 25 SPS. The device offers three power modes (full, mid, and low power) to optimize power consumption versus performance, with a current consumption of 1.2 mA, 0.6 mA, and 0.3 mA respectively. It also features a 50 Hz/60 Hz rejection mode, which is critical for industrial applications where power line interference is common. The integrated PGA provides gains from 1 to 128, allowing direct connection to low-level sensors such as thermocouples and strain gauges.
The AD7124-4 uses a sigma-delta modulator with a digital filter, providing high resolution and excellent linearity. The device includes a 24-bit register map for configuration and data readback, and it communicates via a serial peripheral interface (SPI) that is compatible with 3-wire or 4-wire operation. The internal reference has a typical drift of 5 ppm/°C, ensuring stable measurements over temperature. The device also includes a burnout current source and a diagnostic function that can detect open or shorted sensor inputs, enhancing system reliability.
Typical applications include smart transmitters, process control input modules, low power or battery operated instrumentation, and temperature measurement systems. The AD7124-4 is also suitable for pressure and strain gauge measurements, where its low noise and high gain are essential. The device is recommended for new designs and is available in a tape and reel package (RL suffix) for automated assembly.
When designing with the AD7124-4, it is important to provide a clean analog supply and a stable reference. The device requires a 100 nF decoupling capacitor on the AVDD and DVDD pins, and a 1 uF capacitor on the REFOUT pin. The SPI interface should be isolated from noisy digital circuits to maintain the ADC's noise performance. The device also supports a power-down mode, which can be used to conserve power in battery-operated systems.
드롭인 대체품: AD7124-4BRUZ-RL — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: AD7124-4BRUZ-RL (동일 폼 팩터 및 풋프린트) — 차이점: Number of Channels, Reference Type, Sampling Rate.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AD7124-4BRUZ
✓ 재고 있음
$7.9545 / 개
데이터시트 보기 →AD7124-4BBCPZ-RL7
✓ 재고 있음
$28.6364 / 개
데이터시트 보기 →AD7190BRUZ
✓ 재고 있음
$7.6364 / 개
데이터시트 보기 →AD7124-8BRUZ
📋 참조 대체품 (카탈로그에 없음)
MCP3564-E/ST
📋 참조 대체품 (카탈로그에 없음)
AD7124-4BRUZ-RL 최대 정격 & 전기적 특성
| 분해능 | 24 Bit |
| Number of Channels | 4 Differential or 7 Single-Ended |
| Input Type | Differential, Single-Ended |
| Data Interface | SPI |
| 샘플링 속도 | 19.2 kSPS (max) |
| Architecture | Sigma-Delta |
| Reference Type | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 3.6V |
| Voltage - Supply, Digital | 1.8V ~ 3.6V |
| 특징 | PGA, Temperature Sensor |
| 동작 온도 | -40°C ~ +105°C |
| 패키지 / 케이스 | 24-TSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 24-TSSOP |
| 실장 유형 | Surface Mount |
| RoHS 상태 | ROHS3 Compliant |
AD7124-4BRUZ-RL 핀 구성
| 핀 1 | SCLK — Serial clock input for SPI |
| 핀 2 | DIN — Serial data input for SPI |
| 핀 3 | DOUT — Serial data output for SPI |
| 핀 4 | CS — Chip select input (active low) |
| 핀 5 | DVDD — Digital supply voltage |
| 핀 6 | GND — Ground |
| 핀 7 | AVDD — Analog supply voltage |
| 핀 8 | REFIN1+ — Positive reference input 1 |
| 핀 9 | REFIN1- — Negative reference input 1 |
| 핀 10 | REFIN2+ — Positive reference input 2 |
| 핀 11 | REFIN2- — Negative reference input 2 |
| 핀 12 | AIN0 — Analog input 0 |
| 핀 13 | AIN1 — Analog input 1 |
| 핀 14 | AIN2 — Analog input 2 |
| 핀 15 | AIN3 — Analog input 3 |
| 핀 16 | AIN4 — Analog input 4 |
| 핀 17 | AIN5 — Analog input 5 |
| 핀 18 | AIN6 — Analog input 6 |
| 핀 19 | REFOUT — Internal reference output |
| 핀 20 | P0 — General-purpose digital I/O |
| 핀 21 | P1 — General-purpose digital I/O |
| 핀 22 | P2 — General-purpose digital I/O |
| 핀 23 | P3 — General-purpose digital I/O |
| 핀 24 | SYNC — Synchronization input for multiple ADCs |
일반적인 애플리케이션
AD7124-4BRUZ-RL 적합 용도: 6 애플리케이션s: Smart Transmitters, Process Control Input Modules, Battery-Powered Instrumentation, Temperature Measurement Systems, Pressure and Strain Gauge Measurement, Data Acquisition Systems.
Smart Transmitters
The AD7124-4BRUZ-RL is ideal for smart transmitters used in industrial process control. Its low power consumption (1.2 mA in full power mode) and high resolution (24-bit) enable accurate measurement of pressure, temperature, and flow. The integrated PGA allows direct connection to sensors with small output signals, while the 50/60 Hz rejection mode minimizes power line interference. The device's SPI interface simplifies communication with a host microcontroller, and its wide operating temperature range (-40°C to +105°C) ensures reliable operation in harsh industrial environments.
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Process Control Input Modules
In process control systems, the AD7124-4BRUZ-RL provides high-accuracy analog input measurement for voltage and current signals. Its 24-bit resolution and low noise (1.8 uV RMS at gain 128) ensure precise monitoring of process variables. The device supports multiple input configurations (differential or single-ended) to accommodate various sensor types. The integrated reference and PGA reduce external component count, simplifying module design. The SPI interface allows easy integration with PLCs or distributed control systems, and the device's diagnostic features (burnout current) enhance system reliability.
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Battery-Powered Instrumentation
The AD7124-4BRUZ-RL is well-suited for battery-powered instruments due to its low power modes. In low power mode, it consumes only 0.3 mA, extending battery life in portable devices. The device can operate from a 2.7V supply, making it compatible with single-cell lithium batteries. Its high resolution enables accurate measurement of sensor outputs, such as temperature and humidity, in data loggers and handheld meters. The power-down mode further reduces current consumption to microamps, ideal for intermittent measurements. The small 24-TSSOP package saves board space in compact designs.
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Temperature Measurement Systems
The AD7124-4BRUZ-RL excels in temperature measurement applications, such as thermocouple and RTD sensing. Its integrated PGA with gains up to 128 amplifies the small voltages from thermocouples, while the internal reference provides a stable voltage for ratiometric measurements. The device's low noise (1.8 uV RMS) ensures accurate temperature readings with high resolution. The 50/60 Hz rejection mode filters out power line noise, which is critical in industrial environments. The SPI interface allows easy connection to a microcontroller for linearization and cold-junction compensation. The device's wide temperature range (-40°C to +105°C) matches the operating range of most industrial sensors.
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Pressure and Strain Gauge Measurement
The AD7124-4BRUZ-RL is ideal for pressure and strain gauge applications, where high resolution and low noise are essential. The device's PGA can be configured for gains up to 128, allowing direct connection to bridge sensors with small output voltages. The 24-bit resolution provides excellent dynamic range, enabling detection of minute changes in pressure or strain. The integrated reference and burnout current source simplify sensor excitation and fault detection. The device's low power consumption is beneficial for remote or battery-powered sensing nodes. The SPI interface facilitates data transfer to a host processor for calibration and compensation.
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Data Acquisition Systems
The AD7124-4BRUZ-RL is a key component in multi-channel data acquisition systems, providing high-resolution analog-to-digital conversion for various sensors. Its multiple input channels (4 differential or 7 single-ended) allow simultaneous measurement of different signals. The device's low noise and high linearity ensure accurate data capture for scientific and industrial applications. The SPI interface supports daisy-chaining multiple ADCs for even more channels. The device's power modes enable optimization between performance and power consumption, making it suitable for both benchtop and portable systems. The integrated reference and PGA reduce external components, simplifying system design.
추천
추천 제품 요약
엔지니어링 참조 데이터: AD7124-4BRUZ-RL — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD7124-4BRUZ | AD7124-4BBCPZ-RL7 | AD7124-8BRUZ | AD7190BRUZ | MCP3564-E/ST |
|---|---|---|---|---|---|---|
| Package | 24-TSSOP | 24-TSSOP | 32-LFCSP | 24-TSSOP | 24-TSSOP | 24-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Microchip Technology |
| Resolution | 24 Bit | 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 | 2 Differential | 4 Differential |
| Max Sampling Rate | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 4.8 kSPS | 153.6 kSPS |
| Power Consumption (Full Mode) | 1.2 mA | 1.2 mA | 1.2 mA | 1.2 mA | 6.2 mA | 1.5 mA |
| Integrated PGA | Yes (Gain 1-128) | Yes (Gain 1-128) | Yes (Gain 1-128) | Yes (Gain 1-128) | Yes (Gain 1-128) | Yes (Gain 1-64) |
| Internal Reference | Yes (5 ppm/°C) | Yes (5 ppm/°C) | Yes (5 ppm/°C) | Yes (5 ppm/°C) | Yes (4 ppm/°C) | Yes (10 ppm/°C) |
| 50/60 Hz Rejection | Yes | Yes | Yes | Yes | Yes | Yes |
주요 차별점
- Lower power consumption in full mode (vs AD7190BRUZ)
- More input channels (vs AD7190BRUZ)
- Higher maximum sampling rate (vs AD7190BRUZ)
설계 노트
Provide clean power supplies to the AD7124-4. Use a low-noise LDO regulator for AVDD and DVDD, and place 100 nF decoupling capacitors close to each supply pin. A 1 uF capacitor on REFOUT is recommended. Avoid sharing the analog supply with digital circuits to prevent noise coupling.
For optimal noise performance, use a solid ground plane and separate analog and digital ground areas, connecting them at a single point. Keep analog input traces short and shielded from digital signals. Place the ADC close to the sensor to minimize trace length and reduce noise pickup.
Ensure the SPI interface is properly configured with correct polarity and phase. The AD7124-4 supports SPI mode 0 (CPOL=0, CPHA=0) and mode 3 (CPOL=1, CPHA=1). Incorrect SPI settings can lead to communication errors. Also, verify that the reference voltage is within the specified range to avoid inaccurate conversions.
규정 준수 정보
ROHS3 Compliant per PartGenie. REACH Unaffected. Not AEC-Q100 qualified.
