Datasheet Linear Technology LTC2481CDD#TRPBF — 数据表

制造商	Linear Technology
系列	LTC2481
零件号	LTC2481CDD#TRPBF

具有轻松驱动器输入电流消除和I°C接口的16位Delta Sigma ADC

数据表

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PDF, 806 Kb, 语言: en, 文件上传: Aug 21, 2017, 页数: 40
16-Bit ∆Σ ADC with Easy Drive Input Current Cancellation and I²C Interface

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Package	3x3 DFN-10
Package Code	DD
Package Index	05-08-1699

参数化

ADC INL	0.13 LSB
ADCs	1
Architecture	Delta Sigma
Bipolar/Unipolar Input	Unipolar
Bits	16 bits
Number of Channels	1
DNL	1 LSB
Demo Boards	DC951A
Export Control	no
Features	No Latency, Easy Drive, Temp Sensor, 50Hz & 60Hz Rejection
I/O	Serial I2C
INL ppm	2 ppm
Input Drive	Differential
Input Span	В±0.5VREF/GAIN, 0V to 0.5VREF/GAIN
Internal Reference	no
Operating Temperature Range	0 to 70 °C
Power	0.48 mW
Simultaneous	no
Speed	0.015 ksps
Supply Voltage Range	2.7V to 5.5V

生态计划

RoHS

Compliant

设计须知

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вЂњEasy DriveвЂќ Delta-Sigma Analog-to-Digital Converters Cancel Input Current Errors &mdash DN368
PDF, 75 Kb, 档案已发布: Jun 2, 2005
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вЂњEasy DriveвЂќ Delta-Sigma Analog-to-Digital Converters
Cancel Input Current Errors вЂ“ Design Note 368
Mike Mayes
Introduction
It is now possible to place large RC networks directly in front of high resolution в€†ОЈ analog-to-digital
converters without degrading their DC accuracy
(see Figure 1). The LTC В®248x family of converters
solves this problem with Easy Driveв„ў technology,
a fully passive sampling network that automatically
cancels the differential input current. Easy Drive
technology does not use on-chip buffers, which
compromise performance (see What is Wrong with
On-Chip Buffers?), but instead uses a new architecture
that maintains 0.002% full-scale error with input RC
networks up to 100kО© and 10ОјF. This new technology
offers many advantages over previous generation в€†ОЈ
ADCs: Rail-to-rail common mode input range Direct digitization of high impedance sensors Elimination of sampling spikes seen at the ADC input
pins Simple external lowpass п¬Ѓltering Noise/power reduction Cancellation of external RC settling errors Easy interface to external ampliп¬Ѓers Removal of transmission line effects for remote
sensors
RSOURCE
SENSOR IDIFF = 0
RSOURCE VIN+
CEXT Easy Drive …
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Easy Drive ADCs Simplify Measurement of High Impedance Sensors &mdash DN379
PDF, 146 Kb, 档案已发布: Oct 26, 2005
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advertisement Easy Driveв„ў ADCs Simplify Measurement of
High Impedance Sensors вЂ“ Design Note 379
Mark Thoren
Delta-sigma ADCs, with their high accuracy and high noise
immunity, are ideal for directly measuring many types
of sensors. Nevertheless, input sampling currents can
overwhelm high source impedances or low-bandwidth,
micropower signal conditioning circuits. The LTCВ®2484
family of delta sigma converters solves this problem by
balancing the input currents, thus simplifying or eliminating the need for signal conditioning circuits.
A common application for a delta-sigma ADC is thermistor
measurement. Figure 1 shows the LTC2484 connections
for direct measurement of thermistors up to 100kО©. Data
I/O is through a standard SPI interface and the sampling
current in each input is approximately:
вЋ› VREF вЋћ
вЋњвЋќ
вЋџ вЂ“ VCM
V + + VINвЂ“
2 вЋ
, where VCM = IN
1.5Mв„¦
2 …

文章

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Easy Drive Delta-Sigma ADCs Deliver Powerful Features and Reduce Design Effort &mdash LT Journal
PDF, 346 Kb, 档案已发布: Jan 28, 2008
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LINEAR TECHNOLOGY MArch 2007 IN THIS ISSUEвЂ¦
Cover Article
Easy Drive Delta-Sigma ADCs Deliver
Powerful Features and Reduce Design
Effort.1
Mark Thoren Linear Technology in the NewsвЂ¦.2
Design Features
Current Mode Flyback DC/DC Controller
Provides Tremendous Design Flexibility
.8
Arthur Kelley Isolated Forward Controllers Offer
Buck Simplicity and Performance.10
Charles Hawkes and Arthur Kelley Rugged 3.3V RS485/RS422
Transceivers with Integrated
Switchable Termination.14
Steven Tanghe and Ray Schuler Tiny High Efficiency 2A Buck Regulator
Directly Accepts Automotive, Industrial
and Other Wide Ranging Inputs.18
Kevin Huang 36V Dual 1.4A Monolithic
Step-Down Converter has Start-Up
Tracking and Sequencing.21 VOLUME XVII NUMBER 1 Easy Drive Delta-Sigma
ADCs Deliver Powerful
Features and Reduce …
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Connect High Impedance Sensors Directly to an Easy Drive Delta Sigma ADC &mdash LT Journal
PDF, 123 Kb, 档案已发布: Sep 1, 2005
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DESIGN IDEAS Connect High Impedance Sensors
Directly to an Easy Drive
Delta Sigma ADC
by Mark Thoren
Delta Sigma ADCs are accurate and
have high noise immunity, making
them ideal for directly measuring many
types of sensors. Nevertheless, input
sampling currents can overwhelm
high source impedances or low-bandwidth, micropower signal conditioning
circuits. The LTC2480 family of Delta
Sigma converters solves this problem
by balancing the input currents, thus
simplifying or eliminating the need for
signal conditioning circuits.
A common application for a delta
sigma ADC is thermistor measurement. Figure 1 shows the LTC2480
connections for direct measurement of
thermistors up to 100kО©. Data I/O is
through a standard SPI interface, and
the sampling current in each input is
approximately 5V
C8 …

模型线

系列: LTC2481 (6)

LTC2481CDD#PBF LTC2481CDD#TRPBF LTC2481HDD#PBF LTC2481HDD#TRPBF LTC2481IDD#PBF LTC2481IDD#TRPBF

制造商分类

Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Single Channel ADCs
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) ADCs

其他名称:

LTC2481CDDTRPBF, LTC2481CDD TRPBF