Datasheet > AD7643BSTZ

AD7643BSTZ

更新时间： 2024-11-30 01:13:55

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
29页	530K
描述
18-Bit, 1.25 MSPS PulSAR ADC

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AD7643BSTZ 数据手册

18-Bit, 1.25 MSPS PulSAR^®ADC

AD7643

FUNCTIONAL BLOCK DIAGRAM

FEATURES

TEMP REFBUFIN REF REFGND

DVDD DGND

Throughput: 1.25 MSPS

INL: 1.5 LSB typical, 3 LSB maximum ( 11 ppm of full scale)

18-bit resolution with no missing codes

Dynamic range: 95 dB typical

AGND

AVDD

OVDD

OGND

AD7643

REF

REF AMP

SINAD: 93.5 dB typical @ 20 kHz (V_REF= 2.5 V)

THD: −113 dB typical @ 20 kHz (V_REF= 2.5 V)

2.048 V internal reference: typical drift 8 ppm/°C; TEMP output

Differential input range: V_REF(V_REFup to 2.5 V)

No pipeline delay (SAR architecture)

Parallel (18-, 16-, or 8-bit bus) and serial 5 V/3.3 V/2.5 V interface

SPI®/QSPI™/MICROWIRE™/DSP compatible

Single 2.5 V supply operation

SERIAL

PORT

IN+

IN–

SWITCHED

CAP DAC

D[17:0]

MODE0

MODE1

BUSY

PARALLEL

INTERFACE

PDREF

PDBUF

CLOCK

CONTROL LOGIC AND

CALIBRATION CIRCUITRY

RESET

D0/OB/2C

Power dissipation

65 mW typical @ 1.25 MSPS with internal REF

2 μW in power-down mode

CNVST

Figure 1.

Pb-free, 48-lead LQFP and 48-lead LFCSP_VQ

Pin compatible with the AD7641 and other PulSAR ADC’s

Table 1. PulSAR 48-Lead Selection

100 to

250

500 to

570

650 to

1000

Type/kSPS

>1000

APPLICATIONS

Medical instruments

High speed data acquisition/high dynamic data acquisition

Pseudo

Differential

AD7651,

AD7660,

AD7661

AD7650,

AD7652,

AD7664,

AD7666

AD7653,

AD7667

Digital signal processing

Spectrum analysis

Instrumentation

Communications

ATE

True Bipolar

AD7610,

AD7663

AD7675

AD7665

AD7612,

AD7671

AD7677

True

Differential

AD7676

AD7621,

AD7622,

AD7623

AD7641,

AD7643

18-Bit

Multichannel/

Simultaneous

AD7631,

AD7678

AD7679

AD7654

AD7634,

AD7674

AD7655

GENERAL DESCRIPTION

The AD7643 is an 18-bit, 1.25 MSPS, charge redistribution

SAR, fully differential, analog-to-digital converter (ADC) 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 (and buffer), error correction circuits, and

both serial and parallel system interface ports. The part has no

latency and can be used in asynchronous rate applications. The

AD7643 is hardware factory calibrated and tested to ensure ac

parameters, such as signal-to-noise ratio (SNR), in addition to

the more traditional dc parameters of gain, offset, and linearity.

The AD7643 is only available in Pb-free packages with

PRODUCT HIGHLIGHTS

1. Fast Throughput.

The AD7643 is a 1.25 MSPS, charge redistribution,

18-bit SAR ADC.

2. Superior Linearity.

The AD7643 has no missing 18-bit code.

3. Internal Reference.

The AD7643 has a 2.048 V internal reference with a typical

drift of 8 ppm/°C and an on-chip TEMP sensor.

4. Single-Supply Operation.

operation specified from −40°C to +85°C.

The AD7643 operates from a 2.5 V single supply.

5. Serial or Parallel Interface.

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

interface arrangement compatible with 2.5 V, 3.3 V, or

5 V logic.

Rev. 0

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 registeredtrademarks arethe property of their respective owners.

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

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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AD7643BSTZ 替代型号

型号	品牌	替代类型	描述	数据表
AD7643BSTZRL	ADI	类似代替	暂无描述

与AD7643BSTZ相关器件

型号	品牌	获取价格	描述	数据表
AD7643BSTZRL	ADI	获取价格	暂无描述
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AD7645GLN	ADI	获取价格	12-Bit Buffered Miltiplying CMOS D/A Converter
AD7645GUD	ADI	获取价格	12-Bit Buffered Miltiplying CMOS D/A Converter
AD7645JN	ADI	获取价格	12-Bit Buffered Miltiplying CMOS D/A Converter
AD7645KN	ADI	获取价格	12-Bit Buffered Miltiplying CMOS D/A Converter
AD7645KP	ADI	获取价格	12-Bit Buffered Miltiplying CMOS D/A Converter

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