AD7641

更新时间： 2024-11-28 22:39:03

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	313K
描述
18-Bit, 2 MSPS SAR ADC

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数据手册

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AD7641 数据手册

18-Bit, 2 MSPS SAR ADC

Preliminary Technical Data

AD7641

FEATURES

FUNCTIONAL BLOCK DIAGRAM

REF

TEMP

REFGND

18-bit resolution with no missing codes

2.5V internal low drift refernce

Throughput:

DVDD DGND

AGND

AVDD

OVDD

OGND

AD7641

SERIAL

PORT

2 MSPS (Warp mode)

REFBUFIN

REF

1.5 MSPS (Normal mode)

INL: 2 LSB typical

IN+

IN-

SWITCHED

CAP DAC

D[17:0]

BUSY

S/(N+D): 93 dB typical @ 100 kHz ( V_REF= 2.5 V )

THD: −100 dB typical @ 100 kHz

Differential input range: V_REF(V_REFup to 2.5 V)

No pipeline delay ( SAR architecture )

Parallel (18-, 16-, or 8-bit bus)

Serial 5 V/3.3 V/2.5 V interface

SPI®/QSPI™/MICROWIRE™/DSP compatible

PARALLEL

INTERFACE

PDREF

PDBUF

CLOCK

MODE0

MODE1

CONTROL LOGIC AND

CALIBRATION CIRCUITRY

RESET

WARP IMPULSE

CNVST

Figure 1.

On-board low drift reference with buffer and

temperature sensor

Table 1. PulSAR Selection

Single 2.5 V supply operation

Power dissipation: 100 mW typical @ 2 MSPS

Power-down mode

48-LQFP and LFCSP packages

Speed upgrade of the AD7674

Pin-to-pin compatible with the AD7621

kSPS

800 to

100 to 250 500 to 570 1000

AD7651 AD7650/52 AD7653

AD7660/61 AD7664/66 AD7667

Type

>1000

Pseudo

Differential

True Bipolar

True Differential

18 Bit

AD7663

AD7675

AD7678

AD7665

AD7676

AD7679

AD7671

AD7677 AD7621

AD7674 AD7641

APPLICATIONS

Medical instruments

High dynamic data acquisition

Instrumentation

Spectrum analysis

ATE

Multichannel/

Simultaneous

AD7654

AD7655

PRODUCT HIGHLIGHTS

1. High resolution and Fast Throughput.

The AD7641 is a 2 MSPS, charge redistribution, 18-bit

SAR ADC (no latency).

GENERAL DESCRIPTION

The AD7641 is a 18-bit, 2 MSPS, charge redistribution SAR,

fully differential analog-to-digital converter that operates from

a single 2.5 V power supply. The part contains a high-speed 18-

bit sampling ADC, an internal conversion clock, an internal

reference buffer, error correction circuits, and both serial and

parallel system interface ports. It features a very high sampling

rate mode (Warp) and a fast mode (Normal) for asynchronous

conversion rate applications. The AD7641 is hardware factory

calibrated and comprehensively tested to ensure ac parameters

such as signal-to-noise ratio (SNR) and total harmonic

distortion (THD) in addition to the more traditional dc

parameters of gain, offset and linearity. Operation is specified

from −40°C to +85°C.

2. Superior INL.

The AD7641 has a maximum integral nonlinearity of

2 LSB with no missing 18-bit codes.

3. Single-Supply Operation.

Operates from a single 2.5 V supply. Also features a

power-down mode.

4. Serial or Parallel Interface.

Versatile parallel (18-, 16-, or 8-bit bus) or 2-wire

serial interface arrangement compatible with either

2.5 V, 3.3 V, or 5 V logic.

Rev. Pr E

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.326.8703

www.analog.com

12 3 4 5 6 7...24

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与AD7641相关器件

型号	品牌	获取价格	描述	数据表
AD7641ACP	ADI	获取价格	18-Bit, 2 MSPS SAR ADC
AD7641ACPRL	ADI	获取价格	18-Bit, 2 MSPS SAR ADC
AD7641AST	ADI	获取价格	18-Bit, 2 MSPS SAR ADC
AD7641ASTRL	ADI	获取价格	18-Bit, 2 MSPS SAR ADC
AD7641BCPZ	ADI	获取价格	18-Bit 250/670 kSPS PulSAR Bipolar Programmable Inputs ADC
AD7641BCPZ	ROCHESTER	获取价格	1-CH 18-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, QCC48, 7 X 7 MM, LEAD FR
AD7641BCPZRL	ADI	获取价格	18-Bit 250/670 kSPS PulSAR Bipolar Programmable Inputs ADC
AD7641BSTZ	ADI	获取价格	18-Bit 250/670 kSPS PulSAR Bipolar Programmable Inputs ADC
AD7641BSTZ	ROCHESTER	获取价格	1-CH 18-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP48, LEAD FREE, MS-02
AD7641BSTZRL	ADI	获取价格	18-Bit 250/670 kSPS PulSAR Bipolar Programmable Inputs ADC

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