AD7175-8BCPZ - 24-Bit 250kSPS Sigma-Delta ADC | Analog Devices
부품 번호: AD7175-8BCPZ ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $34.7 | $34.70 |
| 10 | $31.23 | $312.30 |
| 100 | $27.76 | $2,776.00 |
| 500 | $24.29 | $12,145.00 |
| 1,000 | $20.82 | $20,820.00 |
AD7175-8BCPZ 개요
A sigma-delta ADC is an analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution (up to 24 bits) with excellent linearity and low noise. It is ideal for low-bandwidth, high-precision measurement applications such as process control, weigh scales, and temperature monitoring. The AD7175-8 belongs to the family of precision sigma-delta ADCs, which are essential building blocks in data acquisition systems, bridging the analog sensor world to digital processing.
Key features include 24-bit resolution, 250 kSPS output data rate, 8 differential or 16 single-ended inputs, and a maximum scan rate of 50 kSPS for fully settled data. The device offers 85 dB SNR at 250 kSPS and 24-bit no missing codes, with an integrated precision 2.5V reference and true rail-to-rail buffers. It also features a flexible digital filter (sinc5 + sinc1) and a 4-wire SPI interface, making it easy to interface with microcontrollers and DSPs.
Technically, the AD7175-8 uses a high-performance 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 channel to be independently configured with its own gain, filter, and reference settings. This per-channel configurability is a key advantage for multi-sensor systems where different sensors require different signal conditioning.
Typical applications include process control (PLC/DCS analog input modules), weigh scales, temperature and pressure measurement, and medical instrumentation. The device's fast settling time and high accuracy make it suitable for industrial automation and test and measurement equipment.
When designing with the AD7175-8, ensure proper decoupling of the AVDD and DVDD supplies with 10 µF and 0.1 µF capacitors, and use a clean analog ground plane. The REF+ and REF- pins should be bypassed with 10 µF capacitors to minimize reference noise. For best performance, keep the analog input traces short and shielded from digital noise.
드롭인 대체품: AD7175-8BCPZ — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: AD7175-8BCPZ (동일 폼 팩터 및 풋프린트) — 차이점: Operating Temperature Range, Package, Resolution, RoHS Status, Analog Supply Voltage.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AD7175-8BCPZ-RL7
✅ 드롭인✓ 재고 있음
$8.32 / 개
데이터시트 보기 →AD7175-8BCPZ-RL7
✅ 드롭인✓ 재고 있음
$8.32 / 개
데이터시트 보기 →AD7175-8BCPZ 최대 정격 & 전기적 특성
| 분해능 | 24 Bit |
| Number of Channels | 8 Differential / 16 Single-Ended |
| Output Data Rate | 250 kSPS |
| Channel Scan Rate | 50 kSPS (20 µs) for fully settled data |
| SNR | 85 dB at 250 kSPS |
| No Missing Codes | 24-bit |
| Analog Supply Voltage | 2.5V to 5.5V |
| Digital Supply Voltage | 2V to 5.5V |
| Internal Reference | 2.5V precision |
| Input Type | True rail-to-rail buffers |
| Digital Filter | sinc5 + sinc1 |
| 인터페이스 | 4-wire SPI |
| 패키지 | 40-LFCSP-WQ (6x6 mm) |
| 동작 온도 범위 | -40°C to +105°C |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
AD7175-8BCPZ 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 | AIN4 — Analog input 4 |
| 핀 7 | AIN5 — Analog input 5 |
| 핀 8 | AIN6 — Analog input 6 |
| 핀 9 | AIN7 — Analog input 7 |
| 핀 10 | AVSS — Analog ground |
| 핀 11 | REF+ — Positive reference input |
| 핀 12 | REF- — Negative reference input |
| 핀 13 | DVDD — Digital power supply |
| 핀 14 | DGND — Digital ground |
| 핀 15 | SCLK — Serial clock input |
| 핀 16 | DIN — Serial data input |
| 핀 17 | DOUT — Serial data output |
| 핀 18 | CS — Chip select (active low) |
| 핀 19 | SYNC — Synchronization input |
| 핀 20 | RESET — Reset input (active low) |
일반적인 애플리케이션
AD7175-8BCPZ 적합 용도: 6 애플리케이션s: Process Control (PLC/DCS Analog Input Modules), Weigh Scales, Temperature and Pressure Measurement, Medical Instrumentation, Test and Measurement Equipment, Industrial Automation.
Process Control (PLC/DCS Analog Input Modules)
The AD7175-8BCPZ is ideal for PLC/DCS analog input modules due to its 24-bit resolution, 250 kSPS output data rate, and 8 differential/16 single-ended inputs. It provides fast settling (20 µs) for multiplexed channels, enabling high-throughput scanning of multiple sensors. The integrated true rail-to-rail buffers allow direct connection to high-impedance sensors without external conditioning, simplifying front-end design. Its per-channel configurability for gain, filter, and reference settings makes it versatile for various industrial signal types, such as 4-20 mA loops and thermocouples. The SPI interface ensures easy integration with industrial microcontrollers, and the wide supply voltage range (2.5V to 5.5V) accommodates common industrial power rails.
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Weigh Scales
The AD7175-8BCPZ excels in weigh scale applications due to its 24-bit no missing codes and low noise performance, ensuring accurate weight measurements. The fast settling time (20 µs) allows rapid multi-channel scanning, which is beneficial for checkweighers that process many items per minute. The integrated 2.5V reference and true rail-to-rail buffers simplify the load cell interface, reducing external component count. The SPI interface enables straightforward connection to a microcontroller for digital filtering and calibration. Its wide supply voltage range supports battery-powered portable scales as well as industrial bench scales. The device's per-channel configuration allows different gains for different load cells, optimizing dynamic range.
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Temperature and Pressure Measurement
The AD7175-8BCPZ is well-suited for temperature and pressure measurement systems that require high accuracy and multiple channels. Its 24-bit resolution and 85 dB SNR ensure precise conversion of small sensor signals, such as those from thermocouples, RTDs, and pressure transducers. The device's fast settling (20 µs) enables rapid scanning of multiple sensors, making it ideal for data acquisition systems in industrial and laboratory settings. The integrated true rail-to-rail buffers allow direct connection to high-impedance sensors, while the per-channel gain and filter settings accommodate different sensor types. The SPI interface simplifies integration with microcontrollers for linearization and compensation algorithms. The wide operating temperature range (-40°C to +105°C) ensures reliable operation in harsh environments.
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Medical Instrumentation
The AD7175-8BCPZ is suitable for medical instrumentation such as patient monitoring and diagnostic equipment, where high precision and reliability are critical. Its 24-bit resolution and low noise ensure accurate measurement of physiological signals like ECG, EEG, and blood pressure. The fast settling time (20 µs) allows multiplexed acquisition of multiple channels, which is essential for multi-parameter monitors. The integrated true rail-to-rail buffers and 2.5V reference reduce external components, saving board space in compact medical devices. The SPI interface enables seamless integration with medical-grade microcontrollers. The device's wide supply voltage range (2.5V to 5.5V) supports battery-powered portable monitors. Its extended temperature range (-40°C to +105°C) ensures reliable operation in clinical environments.
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Test and Measurement Equipment
The AD7175-8BCPZ is ideal for test and measurement equipment such as data loggers, spectrum analyzers, and precision multimeters. Its 24-bit resolution and 250 kSPS output data rate enable high-speed, high-accuracy data acquisition. The fast settling time (20 µs) allows rapid channel scanning, making it suitable for multi-channel data loggers. The integrated true rail-to-rail buffers and 2.5V reference simplify front-end design, while the per-channel configurability allows optimization for different signal types. The SPI interface ensures easy integration with FPGAs or DSPs for real-time processing. The wide supply voltage range (2.5V to 5.5V) accommodates various test equipment power architectures. Its robust design and extended temperature range make it reliable for benchtop and portable instruments.
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Industrial Automation
The AD7175-8BCPZ is well-suited for industrial automation systems that require precise analog measurement across multiple channels. Its 24-bit resolution and 250 kSPS output data rate enable high-speed, accurate data acquisition for motor control, robotics, and factory automation. The fast settling time (20 µs) allows rapid scanning of sensors, improving system throughput. The integrated true rail-to-rail buffers and 2.5V reference reduce external components, simplifying design and improving reliability. The per-channel configurability allows different sensors (e.g., temperature, pressure, position) to be connected directly, reducing signal conditioning complexity. The SPI interface integrates easily with industrial PLCs and microcontrollers. The wide supply voltage range (2.5V to 5.5V) and extended temperature range (-40°C to +105°C) ensure robust operation in harsh industrial environments.
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추천 제품 요약
엔지니어링 참조 데이터: AD7175-8BCPZ — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD7175-8BCPZ-RL7 | AD7175-8BCPZ-RL | AD7177-2BRUZ | AD7172-2BRUZ | ADS1262 | ADS131M08 |
|---|---|---|---|---|---|---|---|
| Package | 40-LFCSP-WQ (6x6) | 40-LFCSP-WQ (6x6) - same | 40-LFCSP-WQ (6x6) - same | 24-Lead TSSOP | 24-Lead TSSOP | TSSOP-28 | TSSOP-28 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Max Output Data Rate | 250 kSPS | 250 kSPS | 250 kSPS | 10 kSPS | 31.25 kSPS | 38 kSPS | 64 kSPS |
| Number of Channels | 8 Differential / 16 Single-Ended | 8 Differential / 16 Single-Ended | 8 Differential / 16 Single-Ended | 2 Differential / 4 Single-Ended | 2 Differential / 4 Single-Ended | 10 Single-Ended / 5 Differential | 8 Single-Ended |
| SNR | 85 dB at 250 kSPS | 85 dB at 250 kSPS | 85 dB at 250 kSPS | 85 dB at 10 kSPS | 85 dB at 31.25 kSPS | 85 dB at 38 kSPS | 85 dB at 64 kSPS |
| Internal Reference | Yes (2.5V) | Yes (2.5V) | Yes (2.5V) | Yes (2.5V) | Yes (2.5V) | Yes (2.5V) | Yes (1.2V) |
| Interface | 4-wire SPI | 4-wire SPI | 4-wire SPI | 4-wire SPI | 4-wire SPI | SPI | SPI |
| Supply Voltage (Analog) | 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 | 4.75V to 5.25V | 3V to 3.6V |
주요 차별점
- Higher channel count and speed (vs AD7172-2BRUZ)
- Faster settling time (vs ADS1262)
- True rail-to-rail input buffers (vs ADS131M08)
설계 노트
Decouple the AVDD and DVDD supplies with 10 µF and 0.1 µF capacitors placed as close to the pins as possible. Use separate analog and digital ground planes, connecting them at a single point to minimize noise coupling. The wide supply range (2.5V to 5.5V) allows flexibility, but ensure stable, low-noise supplies for optimal ADC performance.
For best performance, keep analog input traces short and shielded from digital noise. Use a solid ground plane under the ADC and route digital signals away from analog inputs. Bypass the REF+ and REF- pins with 10 µF capacitors to minimize reference noise. Follow the layout guidelines in the AD7175-8 datasheet for optimal results.
Avoid exceeding the absolute maximum ratings on any pin. Ensure the input voltage does not exceed the supply rails. When using the internal reference, ensure adequate decoupling to prevent noise. For multiplexed operation, account for settling time (20 µs) to avoid crosstalk between channels. Use the SYNC pin to synchronize multiple ADCs if needed.
규정 준수 정보
RoHS compliance confirmed from distributor data. Other compliance details not specified in provided data.
