Datasheet > ADAS1131

ADAS1131

更新时间： 2024-09-26 14:57:47

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
2页	56K
描述
256通道、24位电流数字ADC模块

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中文翻译

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数据手册

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ADAS1131 数据手册

256-Channel, 24-Bit

Current-to-Digital ADC Module

ADAS1131

Dosimetry and radiation therapy systems

Optical fiber power monitoring

X-ray detection systems

Data Sheet

FEATURES

256-channel, current-to-digital converter module

Up to 24-bit resolution

Variable integration time

Fastest integration time: 11.656 kSPS (86 μs) at 20-bit

resolution

Low power dissipation: 3 mW per channel at any throughput

Integral linearity

0.015ꢀ of reading 0.4 ppm of FSR: single channel active

0.050ꢀ of reading 1.0 ppm of FSR: all channels active

Very low noise

Simultaneous sampling

No dead time, no loss of charge, 100ꢀ charge collection

User adjustable full-scale range

On-board temperature sensor and reference buffer

15 mm × 15 mm, CSP_BGA package

Simple printed circuit board (PCB) design

Integrated capacitors for supply and reference decoupling

0.80 mm pitch BGA allows low cost PCB technology

Support tools

Evaluation board

Reference design with reference layout

FPGA Verilog code

High channel-count data acquisition systems (current or

voltage inputs)

GENERAL DESCRIPTION

The ADAS1131 is a 256-channel, current-to-digital analog-to-

digital converter (ADC) module. It contains 256 low power, low

noise, low input current integrators, simultaneous sample-and-

holds, and two high speed, high resolution ADCs with configurable

sampling rate and resolutions of up to 24 bits. The signal chain

and sampling architecture of the ADAS1131 is designed to

guarantee that all channels are simultaneously sampled, and

that no charge is lost throughout the sampling process.

All converted channel results are output on a single, low voltage

differential signaling (LVDS), self clocked serial interface,

which reduces external hardware.

An SPI-compatible serial interface allows configuration of the

ADC using the SDI_x input. The SDO_x output allows the user

to daisy-chain several ADCs on a single, 3-wire bus. The

ADAS1131 uses the separate supply, IOVDD, to reduce digital

noise effect on the conversions.

APPLICATIONS

The ADAS1131 is in a 15 mm × 15 mm, CSP_BGA package.

Medical, industrial, and security CT scanner data acquisition

Photodiode sensors

FUNCTIONAL BLOCK DIAGRAM

1.8V

2.5V

3.3V

TO NEXT SDI

SDO_x

TO ALL ADCs

VDD1 VDD2 VDD3

REF

SCK

CS_x

AN0

CONFIGURATION

SDI

S/H

RESET

–

ADCL

DOUTx_x

CLKx

SYNC

AN127

AN128

S/H

LVDS/CMOS

INTERFACE

DATA

PROCESSING

FPGA

VIO

2.5V

IOVDD

GND

TEMPERATURE

–

ADCH

ADAS1131

AN255

KGND

S/H

SDI

FROM DOUT

OF OTHER ADCs

REF

SDI_x

2.048V

VT_x

FROM

PREVIOUS SDO

Figure 1.

For more information about the ADAS1131, email adas@analog.com.

Rev. Sp0

Document Feedback

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

Technical Support

www.analog.com

中文翻译

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与ADAS1131相关器件

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ADAS1134	ADI	获取价格	128通道、24位电流数字ADC
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