Datasheet > DDC114

DDC114

更新时间： 2024-10-27 22:29:27

品牌	Logo	应用领域
BB		转换器
页数	文件大小	规格书
30页	386K
描述
Quad Current Input 20-Bit ANALOG-TO-DIGITAL CONVERTER

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DDC114 数据手册

DDC114

SBAS255A − JUNE 2004 − REVISED NOVEMBER 2004

Quad Current Input 20-Bit

ANALOG-TO-DIGITAL CONVERTER

F_DEATURES

DESCRIPTION

SINGLE-CHIP SOLUTION TO DIRECTLY

MEASURE FOUR LOW-LEVEL CURRENTS

HIGH PRECISION, TRUE INTEGRATING

FUNCTION

The DDC114 is a 20-bit quad channel, current-input

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

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

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

be directly connected to its inputs and digitized.

INTEGRAL LINEARITY:

0.01% of Reading 0.5ppm of FSR

VERY LOW NOISE: 5.2ppm of FSR

LOW POWER: 13.5mW/channel

ADJUSTABLE DATA RATE: Up to 3.125kSPS

PROGRAMMABLE FULL SCALE

DAISY-CHAINABLE SERIAL INTERFACE

For each of the four inputs, the DDC114 provides a

dual-switched integrator front-end. This 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.

A_DPPLICATIONS

CT SCANNER DAS

PHOTODIODE SENSORS

INFRARED PYROMETER

LIQUID/GAS CHROMATOGRAPHY

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. The High-Speed

mode supports data rates up to 3.125kSPS with a

corresponding dissipation of 18mW per channel.

Protected by US Patent #5841310

AVDD

VREF

DVDD

The DDC114 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-DDC114

system is minimal.

CLK

CONV

IN1

IN3

RANGE0

RANGE1

RANGE2

TEST

Dual

Switched

Integrator

∆Σ

Modulator

Digital

Control

Filter

CLK_4X

HISPD/LOPWR

RESET

The DDC114 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 DDC114 is offered in a QFN-48 package.

Dual

Switched

Integrator

FORMAT

DCLK

DVALID

DOUT

DIN

IN2

IN4

Dual

Switched

Integrator

∆Σ

Modulator

Digital

Filter

Digital

Input/Output

Dual

Switched

Integrator

DIN

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

ꢓ ꢍꢋ ꢌꢍꢎ ꢏ ꢑꢍ ꢒ ꢖꢕ ꢓ ꢊ ꢌꢊ ꢓ ꢐ ꢑꢊ ꢍꢋꢒ ꢖ ꢕꢎ ꢑꢛꢕ ꢑꢕ ꢎ ꢏꢒ ꢍꢌ ꢆꢕꢜ ꢐꢒ ꢇꢋꢒ ꢑꢎ ꢔꢏ ꢕꢋꢑ ꢒ ꢒꢑ ꢐꢋꢙ ꢐꢎ ꢙ ꢝ ꢐꢎ ꢎ ꢐ ꢋꢑꢞꢚ

ꢀ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DDC114相关器件

型号	品牌	获取价格	描述	数据表
DDC114EH	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL SOT-563 DUAL SURFACE MOUNT TRANSISTOR
DDC114EH-7	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL SOT-563 DUAL SURFACE MOUNT TRANSISTOR
DDC114EK	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL SOT-26 DUAL SURFACE MOUNT TRANSISTOR
DDC114EK-13	DIODES	获取价格	Small Signal Bipolar Transistor, 0.05A I(C), 50V V(BR)CEO, 2-Element, NPN, Silicon, PLASTI
DDC114EK-7	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL SOT-26 DUAL SURFACE MOUNT TRANSISTOR
DDC114EK-7-F	DIODES	获取价格	Small Signal Bipolar Transistor, 0.05A I(C), 50V V(BR)CEO, 2-Element, NPN, Silicon, LEAD F
DDC114EU	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL SOT-363 DUAL SURFACE MOUNT TRANSISTOR
DDC114EU-13	DIODES	获取价格	Small Signal Bipolar Transistor, 0.05A I(C), 50V V(BR)CEO, 2-Element, NPN, Silicon, PLASTI
DDC114EU-13-F	DIODES	获取价格	Transistor
DDC114EU-7	DIODES	获取价格	NPN PRE-BIASED SMALL SIGNAL SOT-363 DUAL SURFACE MOUNT TRANSISTOR

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