AD7172-2BRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
부품 번호: AD7172-2BRUZ ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $13.5 | $13.50 |
| 10 | $12.15 | $121.50 |
| 100 | $10.8 | $1,080.00 |
| 500 | $9.72 | $4,860.00 |
| 1,000 | $8.64 | $8,640.00 |
AD7172-2BRUZ 개요
A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution. It is ideal for precision measurement applications where low noise and high accuracy are required. The AD7172-2 belongs to the family of sigma-delta ADCs, which are widely used in industrial process control, medical instrumentation, and weigh scales.
Key features include 24-bit resolution, 31.25 kSPS output data rate, 2 fully differential or 4 single-ended input channels, true rail-to-rail buffers, and a programmable digital filter. The device also offers a 50 Hz/60 Hz rejection mode, offset and gain calibration, and a 2.5 V internal reference. The integrated buffers simplify the interface to high-impedance sensors.
The AD7172-2 uses a sigma-delta modulator with a digital filter that can be configured for various output data rates and settling times. The device includes a multiplexer that allows each analog input to be configured independently. The SPI interface supports read/write access to the configuration registers and conversion results.
Typical applications include temperature measurement, pressure sensing, weigh scales, and industrial process control. The low power consumption and high resolution make it suitable for battery-powered and portable instruments.
When designing with the AD7172-2, ensure that the reference input is properly decoupled and that the analog input signals are within the common-mode range. The device requires an external reference for best performance, such as the ADR445 or ADR444.
드롭인 대체품: AD7172-2BRUZ — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: AD7172-2BRUZ (동일 폼 팩터 및 풋프린트) — 차이점: Package, Number of Channels, Resolution, Input Type, Sampling Rate.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AD7175-2BRUZ
✅ 드롭인✓ 재고 있음
$9.62 / 개
데이터시트 보기 →AD7176-2BRUZ
✅ 드롭인✓ 재고 있음
$9.5 / 개
데이터시트 보기 →AD7177-2BRUZ
✅ 드롭인✓ 재고 있음
$19.84 / 개
데이터시트 보기 →AD7799BRUZ
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$5.41 / 개
데이터시트 보기 →AD7798BRUZ
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$3.85 / 개
데이터시트 보기 →AD7172-2BRUZ 최대 정격 & 전기적 특성
| 분해능 | 24 Bit |
| Number of Channels | 2 Differential or 4 Single-Ended |
| Output Data Rate | 31.25 kSPS |
| Input Type | Differential, Single-Ended |
| 공급 전압 | 2.5 V to 5.5 V |
| 인터페이스 | SPI |
| 패키지 | 24-Lead TSSOP |
| 동작 온도 범위 | -40°C to +105°C |
| Reference Type | External, Internal |
| Internal Reference | 2.5 V |
| True Rail-to-Rail Buffers | Yes |
| Digital Filter | Programmable |
| 50 Hz/60 Hz Rejection | Yes |
| Offset and Gain Calibration | Yes |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
AD7172-2BRUZ 핀 구성
| 핀 1 | AVDD — Analog power supply |
| 핀 2 | AIN0 — Analog input 0 |
| 핀 3 | AIN1 — Analog input 1 |
| 핀 4 | AIN2 — Analog input 2 |
| 핀 5 | AIN3 — Analog input 3 |
| 핀 6 | REF+ — Positive reference input |
| 핀 7 | REF- — Negative reference input |
| 핀 8 | AVSS — Analog ground |
| 핀 9 | DVDD — Digital power supply |
| 핀 10 | DGND — Digital ground |
| 핀 11 | SCLK — Serial clock input |
| 핀 12 | DIN — Serial data input |
| 핀 13 | DOUT — Serial data output |
| 핀 14 | CS — Chip select |
| 핀 15 | SYNC — Synchronization input |
| 핀 16 | RESET — Reset input |
| 핀 17 | GPIO0 — General purpose I/O |
| 핀 18 | GPIO1 — General purpose I/O |
| 핀 19 | GPIO2 — General purpose I/O |
| 핀 20 | GPIO3 — General purpose I/O |
| 핀 21 | VIO — I/O supply voltage |
| 핀 22 | NC — No connect |
| 핀 23 | NC — No connect |
| 핀 24 | AVDD — Analog power supply |
일반적인 애플리케이션
AD7172-2BRUZ 적합 용도: 6 애플리케이션s: Industrial Process Control, Medical Instrumentation, Weigh Scale Systems, Temperature Measurement, Pressure Sensing, Portable Instrumentation.
Industrial Process Control
The AD7172-2BRUZ is ideal for industrial process control due to its high resolution and low noise. It can accurately digitize signals from sensors such as pressure transmitters and temperature transducers, enabling precise monitoring and control in factory automation. The device's 24-bit resolution and programmable digital filter allow rejection of 50 Hz/60 Hz interference, ensuring stable readings in noisy industrial environments. Its SPI interface simplifies integration with microcontrollers, and the true rail-to-rail buffers allow direct connection to high-impedance sensors without additional signal conditioning.
추천
Medical Instrumentation
In medical instrumentation, the AD7172-2BRUZ provides the high precision and low power consumption required for portable and battery-powered devices. Its 24-bit resolution ensures accurate measurement of physiological signals such as temperature and pressure. The device's low noise performance is critical for applications like patient monitoring, where small signal variations must be detected reliably. The integrated buffers and flexible input configuration support various sensor types, while the SPI interface allows easy data transfer to processing units. The wide supply voltage range accommodates different battery configurations.
추천
Weigh Scale Systems
The AD7172-2BRUZ is well-suited for weigh scale systems, offering 24-bit resolution and low noise to accurately digitize load cell outputs. Its high resolution enables precise weight measurements, essential for commercial and industrial scales. The device's programmable digital filter can be optimized for settling time versus noise, allowing fast and stable readings. The true rail-to-rail buffers simplify the interface to bridge sensors, and the SPI interface facilitates communication with microcontrollers for display and control. The low power consumption is beneficial for battery-powered scales.
추천
Temperature Measurement
The AD7172-2BRUZ is ideal for temperature measurement applications, providing high resolution and accuracy for thermocouples, RTDs, and thermistors. Its 24-bit resolution allows detection of minute temperature changes, crucial for precision control in industrial and laboratory settings. The device's low noise performance ensures stable readings, and the programmable digital filter can reject 50 Hz/60 Hz interference. The integrated buffers allow direct connection to high-impedance sensors, and the SPI interface enables easy integration with data loggers or controllers. The wide supply voltage range supports various system designs.
추천
Pressure Sensing
The AD7172-2BRUZ is well-suited for pressure sensing applications, offering high resolution and low noise to accurately digitize signals from pressure transducers. Its 24-bit resolution enables precise pressure measurements, essential for industrial and automotive applications. The device's programmable digital filter can be adjusted to balance noise and settling time, and the true rail-to-rail buffers simplify interfacing with bridge-type sensors. The SPI interface allows easy communication with microcontrollers for data processing and control. The low power consumption is advantageous for remote or battery-powered sensors.
추천
Portable Instrumentation
The AD7172-2BRUZ is ideal for portable instrumentation due to its low power consumption and high resolution. It enables accurate measurements in battery-powered devices such as handheld multimeters, data loggers, and field analyzers. The device's 24-bit resolution and low noise ensure reliable data acquisition, while the SPI interface allows efficient communication with low-power microcontrollers. The wide supply voltage range supports various battery chemistries, and the compact TSSOP-24 package saves board space. The integrated buffers reduce external component count, simplifying design and reducing overall system power.
추천
추천 제품 요약
엔지니어링 참조 데이터: AD7172-2BRUZ — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD7175-2BRUZ | AD7176-2BRUZ | AD7177-2BRUZ |
|---|---|---|---|---|
| Package | 24-Lead TSSOP | 24-Lead TSSOP | 24-Lead TSSOP | 24-Lead TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 32 Bit |
| Output Data Rate | 31.25 kSPS | 250 kSPS | 250 kSPS | 10 kSPS |
| Input Channels | 2 Diff/4 SE | 2 Diff/4 SE | 2 Diff/4 SE | 2 Diff/4 SE |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Interface | SPI | SPI | SPI | SPI |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
주요 차별점
- True rail-to-rail input buffers (vs AD7799BRUZ)
- Higher output data rate (vs AD7799BRUZ)
- Pin-compatible with higher-performance family (vs AD7175-2BRUZ)
설계 노트
The AD7172-2BRUZ operates from 2.5 V to 5.5 V. Use separate analog and digital supply pins (AVDD and DVDD) with proper decoupling capacitors (0.1 uF and 10 uF) placed close to the pins. A clean analog supply is critical for maintaining the ADC's low noise performance.
For optimal 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 reference decoupling capacitor close to the REF+ and REF- pins to minimize noise.
Ensure the analog input signals are within the common-mode range specified in the datasheet. The AD7172-2BRUZ requires an external reference for best performance; using the internal reference may degrade accuracy. Also, configure the digital filter appropriately to reject 50 Hz/60 Hz interference in industrial environments.
규정 준수 정보
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated for this part.
