Datasheet Linear Technology LTC2431 — 数据表

制造商	Linear Technology
系列	LTC2431

具有差分输入和差分基准的20位无延迟Delta Sigma ADC

数据表

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PDF, 466 Kb, 语言: en, 文件上传: Aug 21, 2017, 页数: 40
20-Bit No Latency ∆Σ™ ADCs with Differential Input and Differential Reference

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	LTC2431CMS#PBF	LTC2431CMS#TRPBF	LTC2431IMS#PBF	LTC2431IMS#TRPBF
N	1	2	3	4
Package	MS-10 包装外形图	MS-10 包装外形图	MS-10 包装外形图	MS-10 包装外形图
Package Code	MS	MS	MS	MS
Package Index	05-08-1661	05-08-1661	05-08-1661	05-08-1661
Pin Count	10	10	10	10

参数化

Parameters / Models	LTC2431CMS#PBF	LTC2431CMS#TRPBF	LTC2431IMS#PBF	LTC2431IMS#TRPBF
ADC INL, LSB	3.14	3.14	3.14	3.14
ADCs	1	1	1	1
Architecture	Delta Sigma	Delta Sigma	Delta Sigma	Delta Sigma
Bipolar/Unipolar Input	Unipolar	Unipolar	Unipolar	Unipolar
Bits, bits	20	20	20	20
Number of Channels	1	1	1	1
DNL, LSB	1	1	1	1
Demo Boards	DC586A	DC586A	DC586A	DC586A
Export Control	no	no	no	no
Features	No Latency	No Latency	No Latency	No Latency
I/O	Serial SPI	Serial SPI	Serial SPI	Serial SPI
INL ppm, ppm	3	3	3	3
Input Drive	Differential	Differential	Differential	Differential
Input Span	В±VREF/2	В±VREF/2	В±VREF/2	В±VREF/2
Internal Reference	no	no	no	no
Operating Temperature Range, °C	0 to 70	0 to 70	-40 to 85	-40 to 85
Power, mW	1	1	1	1
Simultaneous	no	no	no	no
Speed, ksps	0.0075	0.0075	0.0075	0.0075
Supply Voltage Range	2.7V to 5.5V	2.7V to 5.5V	2.7V to 5.5V	2.7V to 5.5V

生态计划

	LTC2431CMS#PBF	LTC2431CMS#TRPBF	LTC2431IMS#PBF	LTC2431IMS#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

其他选择

LTC2430 LTC2430

应用须知

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Delta Sigma ADC Bridge Measurement Techniques &mdash AN96
PDF, 232 Kb, 档案已发布: Jan 17, 2005
AN96 features several applications that demonstrate how to take full advantage of Linear Technology's delta sigma ADCs when interfacing to sensors. In many cases, signal conditioning can be greatly simplified or eliminated completely. This note explains where it is appropriate to use amplifiers and how to optimize amplifier gain. Also included are discussions on measuring effective number of bits (ENOB) and the relationship to instrument performance, frequency response of delta sigma ADCs, and test techniques. C source code for all of the applications is included to aid firmware development.
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Application Note 96
January 2005
Delta Sigma ADC Bridge Measurement Techniques
Mark Thoren
Introduction In a typical 12-bit measurement system, the signal conditioning amplifier requires a very high gain in order to make
use of the full ADC input range. A sensor with a 10mV fullscale output requires a gain of 500 to use the full input
range of a typical 5V input ADC. A filter may be required to
reduce noise at the expense of settling time. Additional
difficulties arise when dealing with the large common
mode voltage typical of a bridge sensor. Most instrumentation amplifiers have a large discrepancy between the
typical CMRR and guaranteed minimum, which may require an additional trim. Sensors for pressure, load, temperature, acceleration and
many other physical quantities often take the form of a
Wheatstone bridge. These sensors can be extremely linear
and stable over time and temperature. However, most
things in nature are only linear if you donвЂ™t bend them too
much. In the case of a load cell, HookeвЂ™s law states that the
strain in a material is proportional to the applied stressвЂ”
as long as the stress is nowhere near the materialвЂ™s yield
point (the вЂњpoint of no returnвЂќ where the material is
permanently deformed). The consequence is that a load
cell based on a resistance strain gauge will have a very
small electrical outputвЂ”often only a few millivolts. In
spite of this, instruments with 100,000 counts of resolution and more are possible. This Application Note presents …

模型线

系列: LTC2431 (4)

LTC2431CMS#PBF LTC2431CMS#TRPBF LTC2431IMS#PBF LTC2431IMS#TRPBF

制造商分类

Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Single Channel ADCs