Datasheet > DDC118IRTCR

DDC118IRTCR

更新时间： 2024-10-26 21:55:11

品牌	Logo	应用领域
BB		转换器
页数	文件大小	规格书
30页	382K
描述
Octal Current Input 20-Bit Analog-To-Digital Converter

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DDC118IRTCR 数据手册

DDC118

SBAS325A − JUNE 2004 − REVISED JUNE 2005

Octal Current Input 20-Bit

Analog-To-Digital Converter

F_DEATURES

A_DPPLICATIONS

SINGLE-CHIP SOLUTION TO DIRECTLY

MEASURE EIGHT LOW-LEVEL CURRENTS

HIGH PRECISION, TRUE INTEGRATING

FUNCTION

CT SCANNER DAS

PHOTODIODE SENSORS

INFRARED PYROMETER

LIQUID/GAS CHROMATOGRAPHY

INTEGRAL LINEARITY:

Protected by US Patent #5841310

0.01% of Reading 0.5ppm of FSR

VERY LOW NOISE: 5.2ppm of FSR

LOW POWER: 13.5mW/channel

DESCRIPTION

ADJUSTABLE DATA RATE: Up to 3.125kSPS

PROGRAMMABLE FULL SCALE

DAISY-CHAINABLE SERIAL INTERFACE

The DDC118 is a 20-bit octal channel, current-input

analog-to-digital (A/D) converter. It combines both

current-to-voltage and A/D conversion so that eight

low-level current output devices, such as photodiodes, can

be directly connected to its inputs and digitized.

AVDD

VREF

DVDD

CLK

For each of the eight inputs, the DDC118 provides a

dual-switched integrator front-end. This design allows for

continuous current integration: while one integrator is

being digitized by the onboard A/D converter, the other is

integrating the input current. Adjustable full-scale ranges

from 12pC to 350pC and adjustable integration times from

50µs to 1s allow currents from fAs to µAs to be measured

with outstanding precision. Low-level linearity is 0.5ppm

of the full-scale range and noise is 5.2ppm of the full-scale

range.

CONV

IN1

IN3

RANGE0

RANGE1

RANGE2

TEST

Dual

Switched

Integrator

∆Σ

Modulator

Digital

Control

Filter

CLK_4X

HISPD/LOPWR

RESET

Dual

Switched

Integrator

IN2

IN4

Dual

Switched

Integrator

∆Σ

Modulator

Digital

Filter

FORMAT

DCLK

DVALID

DOUT

DIN

Two modes of operation are provided. In Low-Power

mode, total power dissipation is only 13.5mW per channel

with a maximum data rate of 2.5kSPS. High-Speed mode

supports data rates up to 3.125kSPS with a corresponding

dissipation of 18mW per channel.

Dual

Switched

Integrator

IN5

IN7

Digital

Dual

Switched

Integrator

∆Σ

Modulator

Digital

Filter

Input/Output

The DDC118 has a serial interface designed for

daisy-chaining in multi-device systems. Simply connect

the output of one device to the input of the next to create

the chain. Common clocking feeds all the devices in the

chain so that the digital overhead in a multi-DDC118

system is minimal.

Dual

Switched

Integrator

IN6

IN8

Dual

Switched

Integrator

DIN

∆Σ

Modulator

Digital

Filter

The DDC118 is a single-supply device using a +5V analog

supply and supporting a +2.7V to +5.25V digital supply.

Operating over the industrial temperature range of −40°C

to 85°C, the DDC118 is offered in a QFN-48 package.

Dual

Switched

Integrator

AGND

DGND

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

ꢀꢁ ꢂ ꢃꢄ ꢅ ꢆꢇ ꢂꢈ ꢃ ꢉꢆꢉ ꢊꢋ ꢌꢍ ꢎ ꢏꢐ ꢑꢊꢍꢋ ꢊꢒ ꢓꢔ ꢎ ꢎ ꢕꢋꢑ ꢐꢒ ꢍꢌ ꢖꢔꢗ ꢘꢊꢓ ꢐꢑꢊ ꢍꢋ ꢙꢐ ꢑꢕꢚ ꢀꢎ ꢍꢙꢔ ꢓꢑꢒ

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ꢀꢎ ꢍ ꢙꢔꢓ ꢑ ꢊꢍ ꢋ ꢖꢎ ꢍ ꢓ ꢕ ꢒ ꢒ ꢊꢋ ꢟ ꢙꢍ ꢕ ꢒ ꢋꢍꢑ ꢋꢕ ꢓꢕ ꢒꢒ ꢐꢎ ꢊꢘ ꢞ ꢊꢋꢓ ꢘꢔꢙ ꢕ ꢑꢕ ꢒꢑꢊ ꢋꢟ ꢍꢌ ꢐꢘ ꢘ ꢖꢐ ꢎ ꢐꢏ ꢕꢑꢕ ꢎ ꢒꢚ

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与DDC118IRTCR相关器件

型号	品牌	获取价格	描述	数据表
DDC118IRTCRG4	TI	获取价格	8-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PQCC48, GREEN, PLASTIC, QFN-48
DDC118IRTCT	BB	获取价格	Octal Current Input 20-Bit Analog-To-Digital Converter
DDC118IRTCT	TI	获取价格	八路电流输入 20 位模数转换器 \| RTC \| 48 \| -40 to 85
DDC1205S	CRANE	获取价格	Analog Circuit, Hybrid, PDIP24,
DDC1215D	CRANE	获取价格	Analog Circuit, Hybrid, PDIP24,
DDC122LH	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL SOT-563 DUAL SURFACE MOUNT TRANSISTOR
DDC122LH_1	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL SOT-563 DUAL SURFACE MOUNT TRANSISTOR
DDC122LH_2	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL DUAL SURFACE MOUNT TRANSISTOR
DDC122LH-7	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL SOT-563 DUAL SURFACE MOUNT TRANSISTOR
DDC122LU	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL SOT-363 DUAL SURFACE MOUNT TRANSISTOR

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