AD7631

更新时间： 2024-09-13 04:30:47

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
14页	334K
描述
18-Bit 250/670 kSPS PulSAR Bipolar Programmable Inputs ADC

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AD7631 数据手册

18-Bit 250/670 kSPS PulSAR^®

Bipolar Programmable Inputs ADC

Preliminary Technical Data

AD7631/AD7634

FEATURES

FUNCTIONAL BLOCK DIAGRAM

TEMP REFBUFIN REF REFGND

VEE

DVDD DGND

VCC

Multiple pins/software programmable input ranges:

±10ꢀ, ±±ꢀ, 10ꢀ, ±ꢀ

iCMOS™ process technology

OVDD

AD7631/

AD7634

AGND

AVDD

OGND

SPPEN

SPPCLK

SPPDATA

HW/SW

Pins or serial SPI input ranges/mode selection

Throughput:

670kSPS (AD7634)

2±0kSPS (AD7631)

INL: ± 1.7± LSB (7± ppm of full scale)

DNL: +2/-1 LSB

18-bit resolution with no missing codes

Dynamic range: 102.± dB typical

SNR: 101 dB typical

REF

SERIAL

PROGRAMMABLE

PORT

REF AMP

IN+

IN-

SWITCHED

CAP DAC

SERIAL DATA

PORT

D[17:0]

BUSY

PDREF

PDBUF

CLOCK

PARALLEL

INTERFACE

CONTROL LOGIC AND

CALIBRATION CIRCUITRY

RESET

D0/OB/2C

THD: -122 dB typical

CNVST WARP IMPULSE

MODE1

MODE0

±ꢀ internal reference: typical drift 7ppm/°C; TEMP output

No pipeline delay (SAR architecture)

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

SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible

Power dissipation:

Figure 1.

Table 1. PulSAR® Selection

100 to

±00 to

±70

6±0 to

1000

Type/kSPS

2±0

>1000

190 mW @ 670kSPS

7± mW @ 2±0kSPS

Pb-free 48-lead LQFP and LFCSP (7x7mm) packages

Pin compatible with other PulSAR ADCs

Pseudo

Differential

AD7651,

AD7660

AD7661

AD7650

AD7652

AD7664

AD7666

AD7653

AD7667

True Bipolar

AD7610,

AD7663

AD7675

AD7665

AD7612,

AD7671

AD7677

APPLICATIONS

True

AD7676

AD7621

AD7622

AD7623

AD7641

AD7643

Differential

Process control

High speed data acquisition

Digital signal processing

Spectrum analysis

Instrumentation

Communications

18-Bit

Multichannel/

Simultaneous

AD7631

AD7678

AD7679

AD7634

AD7674

AD7654

AD7655

PRODUCT HIGHLIGHTS

GENERAL DESCRIPTION

1. Programmable input range and mode selection.

The AD7631/AD7634 is an18-bit, charge redistribution

successive approximation register (SAR) architecture analog-to-

digital converter (ADC) with programmable input ranges and

mode selection via a dedicated write only serial interface (or by

hardware pin-strapping). The device is fabricated on ADI’s

patented iCMOS high voltage process. The device contains a

high speed 18-bit sampling ADC, an internal conversion clock,

an internal reference (and buffer), and both serial and parallel

system interface ports. Power consumption is automatically

scaled with throughput (AD7634 in Impulse mode), making it

ideal for battery-powered applications. It is available in Pb-free,

48-lead packages with operation specified from −40°C to

+85°C.

Dedicated write only serial port used for selecting input

range and mode select (mode select AD7634 only).

2. Fast throughput

The AD7634 is 670kSPS and the AD7631 is 250kSPS.

3. Superior Linearity.

No missing 18-bit code. +/- 1.75 LSB typical INL

4. Internal Reference.

5 V internal reference with a typical drift of 7 ppm/°C

and on-chip TEMP sensor.

5. Serial or Parallel Interface.

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

interface arrangement compatible with 3.3 V, or 5 V logic.

Rev. PrC

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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与AD7631相关器件

型号	品牌	获取价格	描述	数据表
AD7631BCPZ	ADI	获取价格	18-Bit, 250 kSPS, Differential Programmable I
AD7631BCPZRL	ADI	获取价格	18-Bit, 250 kSPS, Differential Programmable I
AD7631BSTZ	ADI	获取价格	18-Bit, 250 kSPS, Differential Programmable I
AD7631BSTZRL	ADI	获取价格	18-Bit, 250 kSPS, Differential Programmable I
AD7634	ADI	获取价格	18-Bit 250/670 kSPS PulSAR Bipolar Programmable Inputs ADC
AD7634BCPZ	ROCHESTER	获取价格	1-CH 18-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, QCC48, 7 X 7 MM, ROHS CO
AD7634BCPZRL	ADI	获取价格	暂无描述
AD7634BSTZ	ADI	获取价格	18-Bit, 670 kSPS, Differential Programmable I
AD7634BSTZRL	ADI	获取价格	18-Bit, 670 kSPS, Differential Programmable Input PulSAR® ADC
AD7641	ADI	获取价格	18-Bit, 2 MSPS SAR ADC

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