LTC2431 20-Bit No Latency Delta Sigma™ ADC with Differential Input and Differential Reference

The LTC®2430/LTC2431 are 2.7V to 5.5V micropower 20-bit differential Delta Sigma analog-to-digital converters with an integrated oscillator, 3ppm INL and 0.56ppm RMS noise. They use delta-sigma technology and provide single cycle settling time for multiplexed applications. Through a single pin, the LTC2431/LTC2431 can be configured for better than 110dB differential mode rejection at 50Hz or 60Hz ±2%, or they can be driven by an external oscillator for a user-defined rejection frequency. The internal oscillator requires no external frequency setting components.

The converters accept any external differential reference voltage from 0.1V to VCC for flexible ratiometric and remote sensing measurement configurations. The fullscale differential input range is from –0.5VREF to 0.5VREF. The reference common mode voltage, VREFCM, and the input common mode voltage, VINCM, may be independently set anywhere within GND to VCC. The DC common mode input rejection is better than 120dB.

The LTC2430/LTC2431 communicate through a flexible 3-wire digital interface that is compatible with SPI and MICROWIRE™ protocols

产品特点 Features Low Supply Current (200µA in Conversion Mode and 4µA in Autosleep Mode) Differential Input and Differential Reference with GND to VCC Common Mode Range 3ppm INL, No Missing Codes 10ppm Full-Scale Error and 1ppm Offset 0.56ppm Noise, 20.8 ENOBs No Latency: Digital Filter Settles in a Single Cycle. Each Conversion Is Accurate, Even After an Input Step Single Supply 2.7V to 5.5V Operation Internal Oscillator—No External Components Required 110dB Min, 50Hz/60Hz Notch Filter Pin Compatible with 24-Bit LTC2410/LTC2411 封装	应用 Direct Sensor Digitizer Weight Scales Direct Temperature Measurement Gas Analyzers Strain Gauge Transducers Instrumentation Data Acquisition Industrial Process Control DVMs and Meters 典型应用图参数

产品特点 Features

Low Supply Current (200µA in Conversion Mode and 4µA in Autosleep Mode)
Differential Input and Differential Reference with GND to VCC Common Mode Range
3ppm INL, No Missing Codes
10ppm Full-Scale Error and 1ppm Offset
0.56ppm Noise, 20.8 ENOBs
No Latency: Digital Filter Settles in a Single Cycle. Each Conversion Is Accurate, Even After an Input Step
Single Supply 2.7V to 5.5V Operation
Internal Oscillator—No External Components Required
110dB Min, 50Hz/60Hz Notch Filter
Pin Compatible with 24-Bit LTC2410/LTC2411

封装

应用

Direct Sensor Digitizer
Weight Scales
Direct Temperature Measurement
Gas Analyzers
Strain Gauge Transducers
Instrumentation
Data Acquisition
Industrial Process Control
DVMs and Meters

典型应用图

参数

LTC2431 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC2431CGN	SSOP	16	C	$4.40	$3.55
LTC2431CGN#PBF	SSOP	16	C	$4.40	$3.55
LTC2431CGN#TR	SSOP	16	C		$3.61
LTC2431CGN#TRPBF	SSOP	16	C		$3.61
LTC2431IGN	SSOP	16	I	$4.75	$3.90
LTC2431IGN#PBF	SSOP	16	I	$4.75	$3.90
LTC2431IGN#TR	SSOP	16	I		$3.96
LTC2431IGN#TRPBF	SSOP	16	I		$3.96

LTC2431 数据手册及相关资料下载

数据手册(英文) : LTC2430/LTC2431 - 20-Bit No Latency Delta Sigma ADCs with Differential Input and Differential Reference.PDF
设计要点 (英文) : DN237 - 1- and 2-Channel No Latency Delta Sigma, 24-Bit ADCs Easily Digitize a Variety of Sensors, Part 2.PDF
可靠性数据 : R380 Reliability Data .PDF
产品选型卡 : No Latency Delta-Sigma™ ADCs.PDF
产品选型卡 : Ultra-Tiny 16-Bit ΔΣ ADC Family.PDF
LT Journal: Mar 2007 - Easy Drive Delta-Sigma ADCs Deliver Powerful Features and Reduce Design Effort.PDF