AD7621ASTZ-RL7 - 16-Bit 3MSPS PulSAR ADC | Analog Devices
부품 번호: AD7621ASTZ-RL7 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $23.45 | $23.45 |
| 10 | $21.12 | $211.20 |
| 100 | $18.76 | $1,876.00 |
| 500 | $16.89 | $8,445.00 |
| 1,000 | $15.23 | $15,230.00 |
AD7621ASTZ-RL7 개요
An ADC is an electronic component that converts an analog voltage or current into a digital number proportional to the magnitude of the signal. The AD7621 is a SAR-type ADC, which uses a binary search algorithm to determine the digital output. SAR ADCs are known for their high speed, low power consumption, and ease of use, making them ideal for applications requiring high-resolution sampling at moderate speeds. The AD7621 sits in the hierarchy of data converters, specifically within the family of high-speed, high-resolution ADCs used in industrial, medical, and communication systems.
Key features of the AD7621 include a throughput of 3 MSPS in wideband warp and warp modes, 2 MSPS in normal mode, and 1.25 MSPS in impulse mode. It has an internal 2.048 V reference and supports a differential input range of ±VREF (with VREF up to 2.5 V). The device offers excellent linearity with 2 LSB INL (integral nonlinearity) and operates from a single 2.5 V supply, minimizing power consumption. The AD7621 also includes an internal conversion clock and a high-speed 16-bit sampling ADC, simplifying system design.
Technically, the AD7621 uses a charge redistribution architecture that samples the analog input onto a capacitor array. The internal reference and conversion clock reduce external component requirements. The device provides both parallel and serial data interfaces, offering flexibility in system integration. The fully differential input provides common-mode rejection, improving noise performance in noisy environments.
Typical applications for the AD7621 include high-speed data acquisition, medical imaging, instrumentation, and communication systems. Its high throughput and resolution make it suitable for applications such as digital oscilloscopes, spectrum analyzers, and industrial process control. The device's low power consumption and small package enable compact, portable designs.
When designing with the AD7621, ensure proper decoupling of the power supply and reference pins. Use a low-noise reference and adequate analog input drive circuitry to achieve specified performance. The differential input should be driven with a suitable amplifier to maintain signal integrity.
드롭인 대체품: AD7621ASTZ-RL7 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: AD7621ASTZ-RL7 (동일 폼 팩터 및 풋프린트) — 차이점: Architecture, Input Type, Package, Resolution, Sampling Rate.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
AD7621ASTZ
✅ 드롭인✓ 재고 있음
$15.9 / 개
데이터시트 보기 →AD7621ASTZRL
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
AD7621BSTZ
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
AD7621BCPZ
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$14.08 / 개
데이터시트 보기 →AD7621ASTZ-RL
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
AD7621ASTZ-RL7 최대 정격 & 전기적 특성
| 분해능 | 16 bit |
| 샘플링 속도 | 3 MSPS (wideband warp and warp mode), 2 MSPS (normal mode), 1.25 MSPS (impulse mode) |
| Number of Inputs | 1 |
| Input Type | Differential |
| Data Interface | Parallel, Serial |
| Architecture | SAR |
| Reference Type | Internal |
| Internal Reference Voltage | 2.048 V |
| Differential Input Range | ±VREF (VREF up to 2.5 V) |
| INL (적분 비선형성) | 2 LSB |
| 공급 전압 | 2.5 V (single) |
| 패키지 | 48-LQFP (7x7 mm) |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
AD7621ASTZ-RL7 핀 구성
| 핀 1 | AVDD — Analog power supply |
| 핀 2 | AVSS — Analog ground |
| 핀 3 | IN+ — Positive differential input |
| 핀 4 | IN- — Negative differential input |
| 핀 5 | REF — Reference input/output |
| 핀 6 | REFGND — Reference ground |
| 핀 7 | DVDD — Digital power supply |
| 핀 8 | DGND — Digital ground |
| 핀 9 | BUSY — Busy output indicating conversion status |
| 핀 10 | CS — Chip select input |
| 핀 11 | RD — Read input for parallel interface |
| 핀 12 | SCLK — Serial clock input |
일반적인 애플리케이션
AD7621ASTZ-RL7 적합 용도: 6 애플리케이션s: High-Speed Data Acquisition, Medical Imaging, Instrumentation, Communication Systems, Industrial Process Control, Test and Measurement.
High-Speed Data Acquisition
The AD7621ASTZ-RL7 is ideal for high-speed data acquisition systems requiring 16-bit resolution and sampling rates up to 3 MSPS. Its fully differential input and low INL ensure accurate capture of fast-changing signals. In a typical DAQ system, the ADC is placed after a signal conditioning stage, converting analog sensor outputs into digital data for processing. The high throughput enables real-time monitoring in applications like vibration analysis and transient capture. The internal reference and conversion clock simplify the design, reducing external component count and board space. With a single 2.5 V supply, it is suitable for portable and battery-powered instruments.
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Medical Imaging
In medical imaging systems such as ultrasound and MRI, the AD7621ASTZ-RL7 provides high-resolution digitization of analog signals. Its 16-bit resolution and 3 MSPS sampling rate capture fine details in imaging data. The fully differential input rejects common-mode noise, improving image quality. The low power consumption is beneficial for portable medical devices. The ADC's small 48-LQFP package allows for compact PCB layouts in space-constrained equipment. The internal reference reduces external component count, enhancing reliability. The device's high linearity (2 LSB INL) ensures accurate representation of analog signals, critical for diagnostic accuracy.
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Instrumentation
The AD7621ASTZ-RL7 is well-suited for precision instrumentation such as digital multimeters, spectrum analyzers, and data loggers. Its 16-bit resolution and 3 MSPS sampling rate enable accurate measurement of a wide range of signals. The fully differential input allows direct connection to sensors with differential outputs, such as strain gauges and thermocouples. The device's low INL ensures measurement accuracy, and the internal reference provides a stable voltage reference. The parallel and serial interfaces offer flexibility in connecting to microcontrollers or DSPs. The single 2.5 V supply simplifies power design, and the small package is ideal for benchtop and portable instruments.
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Communication Systems
In communication systems, the AD7621ASTZ-RL7 is used in base stations, software-defined radios, and test equipment. Its high sampling rate and 16-bit resolution enable digitization of IF signals for digital signal processing. The fully differential input provides good common-mode rejection, essential in noisy RF environments. The device's low power consumption is advantageous for power-sensitive applications. The internal reference and conversion clock reduce external components, simplifying design. The parallel interface allows high-speed data transfer to FPGAs or DSPs. The small package is suitable for dense PCB layouts in communication infrastructure.
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Industrial Process Control
The AD7621ASTZ-RL7 is used in industrial process control systems for monitoring and controlling variables such as temperature, pressure, and flow. Its 16-bit resolution and 3 MSPS sampling rate allow precise measurement of fast-changing process signals. The fully differential input rejects common-mode noise from industrial environments. The device's low power consumption is suitable for field instruments. The internal reference and conversion clock reduce external component count, enhancing reliability. The parallel and serial interfaces provide flexibility in connecting to PLCs or microcontrollers. The small package is ideal for space-constrained control modules.
추천
Test and Measurement
The AD7621ASTZ-RL7 is a key component in test and measurement equipment such as oscilloscopes, logic analyzers, and signal generators. Its 16-bit resolution and 3 MSPS sampling rate enable accurate digitization of waveforms. The fully differential input allows connection to differential probes. The device's low INL ensures measurement accuracy, and the internal reference provides a stable voltage reference. The parallel interface enables high-speed data transfer to processing units. The single 2.5 V supply simplifies power design, and the small package is suitable for portable test equipment. The device's high performance makes it ideal for demanding measurement applications.
추천
추천 제품 요약
엔지니어링 참조 데이터: AD7621ASTZ-RL7 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD7621ASTZ | AD7621ASTZRL | AD7621BSTZ |
|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit |
| Sampling Rate | 3 MSPS | 3 MSPS | 3 MSPS | 3 MSPS |
| Input Type | Differential | Differential | Differential | Differential |
| Data Interface | Parallel, Serial | Parallel, Serial | Parallel, Serial | Parallel, Serial |
| INL | 2 LSB | 2 LSB | 2 LSB | 2 LSB |
| Supply Voltage | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
주요 차별점
- High speed with 16-bit resolution (vs AD7621ASTZ)
- Fully differential input (vs AD7621ASTZRL)
- Internal reference and conversion clock (vs AD7621BSTZ)
설계 노트
The AD7621ASTZ-RL7 operates from a single 2.5 V supply. Use low-noise LDO regulators to supply AVDD and DVDD separately to minimize digital noise coupling into the analog supply. Place 0.1 uF and 10 uF decoupling capacitors close to each power pin. The internal reference requires a stable supply; consider using a dedicated reference buffer if high accuracy is needed.
For optimal performance, use a solid ground plane and separate analog and digital ground areas, connecting them at a single point. Keep the analog input traces short and shielded to reduce noise pickup. The differential inputs should be routed as a pair with matched lengths. Place the ADC close to the signal source to minimize trace inductance.
Ensure the analog input voltage does not exceed the specified range to avoid damage. The reference pin should be bypassed with a 10 uF capacitor. When using the parallel interface, ensure proper timing to avoid bus contention. The internal conversion clock is sensitive to power supply noise; maintain clean supplies. Refer to the datasheet for layout guidelines.
규정 준수 정보
RoHS compliant per distributor listings. Other compliance data not specified in the provided data.
