LTC2428C

更新时间： 2024-11-12 22:55:51

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
28页	320K
描述
4-/8-Channel 20-Bit uPower No Latency ADCs

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LTC2428C 数据手册

Final Electrical Specifications

LTC2424/LTC2428

4-/8-Channel 20-Bit µPower

No Latency ∆Σ^TMADCs

March 2000

FEATURES

DESCRIPTIO

The LTC^®2424/LTC2428 are 4-/8-channel 2.7V to 5.5V

micropower 20-bit A/D converters with an integrated

oscillator, 8ppm INL and 1.2ppm RMS noise. They use

delta-sigma technology and provide single cycle digital

filter settling time (no latency delay) for multiplexed

applications. The first conversion after the channel is

changedisalwaysvalid.ThroughasinglepintheLTC2424/

LTC2428 can be configured for better than 110dB rejec-

tion at 50Hz or 60Hz ±2%, or can be driven by an external

oscillator for a user defined rejection frequency in the

range 1Hz to 800Hz. The internal oscillator requires no

external frequency setting components.

■

Pin Compatible 4-/8-Channel 20-Bit ADCs

■

8ppm INL, No Missing Codes at 20 Bits

■

4ppm Full-Scale Error and 0.5ppm Offset

■

1.2ppm Noise

■

Digital Filter Settles in a Single Cycle. Each

Conversion is Accurate, Even After Changing

Channels

■

Fast Mode: 16-Bit Noise, 12-Bit TUE at 100sps

■

Internal Oscillator—No External Components

Required

■

110dB Min, 50Hz/60Hz Notch Filter

■

Reference Input Voltage: 0.1V to V_CC

■

Live Zero—Extended Input Range Accommodates

The converters accept any external reference voltage from

0.1VtoV_CC. Withtheirextendedinputconversionrangeof

–12.5% V_REFto 112.5% V_REF(V_REF= FS_SET– ZS_SET) the

LTC2424/LTC2428 smoothly resolve the offset and

overrange problems of preceding sensors or signal con-

ditioning circuits.

12.5% Overrange and Underrange

Single Supply 2.7V to 5.5V Operation

■

Low Supply Current (200µA) and Auto Shutdown

Can Be Interchanged with 24-Bit LTC2404/LTC2408

■

if ZS_SETPin is Grounded

APPLICATIO S

The LTC2424/LTC2428 communicate through a flexible

4-wire digital interface which is compatible with SPI and

MICROWIRE^TMprotocols.

■

Weight Scales

■

Direct Temperature Measurement

, LTC and LT are registered trademarks of Linear Technology Corporation.

■

Gas Analyzers

Strain-Gage Transducers

Instrumentation

Data Acquisition

Industrial Process Control

4-Digit DVMs

No Latency ∆Σ is a trademark of Linear Technology Corporation.

MICROWIRE is a trademark of National Semiconductor Corporation.

■

TYPICAL APPLICATIO

Total Unadjusted Error vs Output Code

0.1V TO V

= 5V

2.7V TO 5.5V

= 5V

2, 8

REF

1µF

= 25°C

MUXOUT

ADCIN

SET CC

= LOW

SERIAL DATA LINK

MICROWIRE AND

SPI COMPATABLE

CH0

10 CH1

11 CH2

12 CH3

13 CH4*

14 CH5*

15 CH6*

17 CH7*

CSADC

CSMUX

SCK

ANALOG

INPUTS

20-BIT

∆∑ ADC

4-/8-CHANNEL

MUX

–2

–4

–6

–8

–10

MPU

CLK

–0.12V

REF

1.12V

REF

–

SDO

LTC2424/LTC2428

= INTERNAL OSC/50Hz REJECTION

= EXTERNAL CLOCK SOURCE

= INTERNAL OSC/60Hz REJECTION

SET

GND

8,338,608

OUTPUT CODE (DECIMAL)

16,777,215

24248 TA01

1, 6, 16, 18, 22, 27, 28

*THESE PINS ARE NO CONNECTS ON THE LTC2404

24248 TA02

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.

12 3 4 5 6 7...28

中文翻译

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与LTC2428C相关器件

型号	品牌	获取价格	描述	数据表
LTC2428CG	Linear	获取价格	4-/8-Channel 20-Bit uPower No Latency ADCs
LTC2428CG#TRPBF	Linear	获取价格	LTC2428 - 4-/8-Channel 20-Bit µPower No Latency Delta-Sigma ADC; Package: SSOP; P
LTC2428I	Linear	获取价格	4-/8-Channel 20-Bit uPower No Latency ADCs
LTC2428IG	Linear	获取价格	4-/8-Channel 20-Bit uPower No Latency ADCs
LTC2430	Linear	获取价格	20-Bit No Latency Delta-Sigma ADCs with Differential Input and Differential Reference
LTC2430	ADI	获取价格	具差分输入和差分基准的 20 位、No Latency ?Σ? ADC
LTC2430_15	Linear	获取价格	20-Bit No Latency ADCs with Differential Input and Differential Reference
LTC2430CGN	Linear	获取价格	20-Bit No Latency Delta-Sigma ADCs with Differential Input and Differential Reference
LTC2430CGN#PBF	Linear	获取价格	LTC2430 - 20-Bit No Latency Delta Sigma ADCs with Differential Input and Differential Refe
LTC2430CGN#TRPBF	Linear	获取价格	暂无描述

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