AD7621BCPZ-RL7 - 16-Bit 3MSPS PulSAR ADC | Analog Devices
부품 번호: AD7621BCPZ-RL7 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $25.43 | $25.43 |
| 10 | $23.12 | $231.20 |
| 100 | $20.81 | $2,081.00 |
| 500 | $18.5 | $9,250.00 |
| 1,000 | $16.19 | $16,190.00 |
AD7621BCPZ-RL7 개요
A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm to convert an analog input into a digital output. It is known for its high speed, low power consumption, and excellent accuracy, making it suitable for applications such as medical imaging, industrial process control, and high-speed data acquisition. The AD7621 belongs to the PulSAR family of ADCs, which are renowned for their superior linearity and no missing codes.
Key features of the AD7621 include a maximum throughput of 3 MSPS, no missing 16-bit codes, and an internal reference with low drift. The device also offers a flexible serial interface that is compatible with SPI, QSPI, MICROWIRE, and DSPs, simplifying integration into digital systems. The ADC operates from a single 2.5 V supply, reducing power supply complexity, and features a power-down mode for energy savings in battery-powered applications.
The AD7621 uses a charge redistribution architecture with a capacitive DAC, providing excellent linearity and low noise. The internal reference buffer ensures accurate conversion results, while the device's high input bandwidth allows it to digitize high-frequency signals without significant aliasing. The ADC also includes a track-and-hold circuit that maintains signal integrity during conversion.
Typical applications for the AD7621 include high-speed data acquisition, medical imaging (such as ultrasound and MRI), industrial process control, and instrumentation. Its combination of speed, accuracy, and low power makes it suitable for portable and battery-operated devices where power efficiency is critical.
When designing with the AD7621, it is important to provide a clean, low-noise power supply and proper decoupling to achieve optimal performance. The reference voltage should be bypassed with a capacitor to minimize noise, and the analog input should be driven with a low-impedance source to avoid settling time issues.
드롭인 대체품: AD7621BCPZ-RL7 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: AD7621BCPZ-RL7 (동일 폼 팩터 및 풋프린트) — 차이점: Architecture, Input Type, Package, Power Dissipation, Reference Drift.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AD7621ACPZ
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
AD7621BCPZ
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$14.08 / 개
데이터시트 보기 →AD7625BCPZ
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
AD7623BCPZ
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
AD7622BCPZ
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
AD7621BCPZ-RL7 최대 정격 & 전기적 특성
| 분해능 | 16 bits |
| 샘플링 속도 | 3 MSPS |
| Number of Inputs | 1 |
| Input Type | Differential |
| Data Interface | SPI, QSPI, MICROWIRE, DSP |
| Architecture | SAR |
| Reference Type | Internal, External |
| Internal Reference Voltage | 2.048 V |
| Reference Drift | ±7 ppm/°C |
| 공급 전압 | 2.5 V |
| Power Dissipation | 65 mW typical |
| 동작 온도 범위 | -40°C to +85°C |
| 패키지 | 48-LFCSP (7x7 mm) |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
AD7621BCPZ-RL7 핀 구성
| 핀 1 | AVDD — Analog power supply (2.5V) |
| 핀 2 | IN+ — Positive differential analog input |
| 핀 3 | IN- — Negative differential analog input |
| 핀 4 | GND — Ground |
| 핀 5 | REF — Reference voltage input/output |
| 핀 6 | REFGND — Reference ground |
| 핀 7 | DVDD — Digital power supply (2.5V) |
| 핀 8 | SCLK — Serial clock input |
| 핀 9 | SDIN — Serial data input for configuration |
| 핀 10 | SDOUT — Serial data output |
| 핀 11 | CNVST — Conversion start input |
| 핀 12 | BUSY — Busy output indicating conversion in progress |
일반적인 애플리케이션
AD7621BCPZ-RL7 적합 용도: 6 애플리케이션s: High-Speed Data Acquisition, Medical Imaging, Industrial Process Control, Instrumentation, Communications, Test and Measurement.
High-Speed Data Acquisition
The AD7621BCPZ-RL7's 3 MSPS sampling rate and 16-bit resolution make it ideal for high-speed data acquisition systems. Its low power dissipation of 65 mW allows for dense channel counts without excessive heat generation. The differential input rejects common-mode noise, ensuring accurate signal capture in industrial environments. The serial interface simplifies connection to FPGAs and DSPs, enabling rapid data transfer. This ADC is well-suited for applications such as vibration analysis, transient recording, and high-speed instrumentation where both speed and precision are critical.
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Medical Imaging
In medical imaging systems such as ultrasound and MRI, the AD7621BCPZ-RL7 provides the high resolution and speed needed to digitize analog signals with exceptional clarity. Its 16-bit resolution ensures fine detail in images, while the 3 MSPS sampling rate captures fast-moving signals without aliasing. The low power consumption is beneficial for portable medical devices, extending battery life. The internal reference with low drift (±7 ppm/°C) maintains accuracy over temperature variations, which is crucial for diagnostic equipment. The differential input helps reject interference from other medical electronics, ensuring clean signal acquisition.
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Industrial Process Control
The AD7621BCPZ-RL7 is well-suited for industrial process control systems that require precise monitoring of analog signals such as temperature, pressure, and flow. Its 16-bit resolution provides high accuracy, while the 3 MSPS sampling rate enables real-time control loops. The device operates from a single 2.5 V supply, simplifying power design in industrial environments. The wide operating temperature range (-40°C to +85°C) ensures reliable performance in harsh conditions. The serial interface allows easy integration with industrial microcontrollers and PLCs, making it a versatile choice for factory automation and process monitoring.
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Instrumentation
The AD7621BCPZ-RL7 is an excellent choice for precision instrumentation such as digital multimeters, spectrum analyzers, and data loggers. Its 16-bit resolution and 3 MSPS sampling rate allow accurate measurement of fast-changing signals. The low power dissipation of 65 mW is advantageous for portable instruments, extending battery life. The internal reference with low drift ensures stable measurements over time and temperature. The differential input reduces noise pickup, improving measurement accuracy. The serial interface supports high-speed data transfer to a host processor, enabling real-time analysis and display.
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Communications
In communications systems, the AD7621BCPZ-RL7 can be used for digitizing IF signals in software-defined radios and base stations. Its 16-bit resolution provides high dynamic range, while the 3 MSPS sampling rate is sufficient for many IF frequencies. The low power consumption is beneficial for remote and battery-powered communication equipment. The differential input helps reject common-mode interference, improving signal quality. The serial interface allows easy connection to FPGAs and DSPs for digital signal processing. This ADC is suitable for applications such as spectrum monitoring, signal analysis, and digital receivers.
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Test and Measurement
The AD7621BCPZ-RL7 is ideal for test and measurement equipment such as oscilloscopes, logic analyzers, and waveform generators. Its 3 MSPS sampling rate and 16-bit resolution enable accurate digitization of analog waveforms. The low power dissipation allows for compact, fanless designs. The internal reference ensures stable voltage references for consistent measurements. The differential input provides high common-mode rejection, which is essential in noisy test environments. The serial interface supports high-speed data transfer to a host computer for analysis and display, making it a key component in modern test instruments.
추천
추천 제품 요약
엔지니어링 참조 데이터: AD7621BCPZ-RL7 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD7621ACPZ | AD7626BCPZ-RL7 | AD7625BCPZ |
|---|---|---|---|---|
| Package | 48-LFCSP (7x7 mm) | 48-LFCSP (7x7 mm) - same | 32-LFCSP-WQ (5x5 mm) - different | 48-LFCSP (7x7 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits |
| Sampling Rate | 3 MSPS | 3 MSPS | 10 MSPS | 6 MSPS |
| Power Dissipation | 65 mW | 65 mW | 115 mW | 80 mW |
| Internal Reference | Yes (2.048V) | Yes (2.048V) | Yes (2.048V) | Yes (2.048V) |
| Input Type | Differential | Differential | Differential | Differential |
| Interface | SPI, QSPI, MICROWIRE, DSP | SPI, QSPI, MICROWIRE, DSP | SPI, QSPI, MICROWIRE, DSP | SPI, QSPI, MICROWIRE, DSP |
주요 차별점
- Higher sampling rate than AD7623BCPZ (vs AD7623BCPZ)
- Lower power than AD7626BCPZ-RL7 (vs AD7626BCPZ-RL7)
- Pin-compatible with AD7625BCPZ (vs AD7625BCPZ)
설계 노트
The AD7621BCPZ-RL7 operates from a single 2.5V supply. Use low-noise LDO regulators to supply AVDD and DVDD separately to minimize digital noise coupling into the analog supply. Place 0.1uF and 10uF decoupling capacitors close to each supply pin. The reference pin should be bypassed with a 10uF low-ESR capacitor to ensure stable operation.
For optimal performance, use a solid ground plane and separate analog and digital ground areas, connecting them at a single point near the ADC. Keep analog input traces short and shielded to reduce noise pickup. The differential inputs should be routed as a closely coupled pair to maintain common-mode rejection. Avoid routing digital signals under the analog input area.
Ensure the analog input signal settles within the acquisition time to avoid conversion errors. The input source impedance should be low (typically < 50 ohms) to drive the ADC's sample-and-hold circuit. Use an op-amp buffer if necessary. Also, avoid exceeding the absolute maximum ratings on any pin, as this can damage the device. Refer to the datasheet for the recommended input drive circuit.
규정 준수 정보
RoHS compliance is indicated by the 'CP' suffix in the part number. Other compliance details are not explicitly stated in the provided data.
