LTC2421 1-/2-Channel 20-Bit µPower No Latency Delta Sigma™ ADCs in MSOP-10

The LTC®2421/LTC2422 are 1- and 2-channel 2.7V to 5.5V micropower 20-bit analog-to-digital converters with an integrated oscillator, 8ppm INL and 1.2ppm RMS noise. These ultrasmall devices use delta-sigma technology and a new digital filter architecture that settles in a single cycle. This eliminates the latency found in conventional DeltaSigma converters and simplifies multiplexed applications.

Through a single pin, the LTC2421/LTC2422 can be configured for better than 110dB rejection at 50Hz or 60Hz ±2%, or can be driven by an external oscillator for a user defined rejection frequency in the range 1Hz to 120Hz. The internal oscillator requires no external frequency setting components.

These converters accept an external reference voltage from 0.1V to VCC. With an extended input conversion range of –12.5% VREF to 112.5% VREF (VREF = FSSET – ZSSET), the LTC2421/LTC2422 smoothly resolve the offset and overrange problems of preceding sensors or signal conditioning circuits.

The LTC2421/LTC2422 communicate through a 2- or 3-wire digital interface that is compatible with SPI and MICROWIRE™ protocols

产品特点 Features 20-Bit ADCs in Tiny MSOP-10 Packages 1- or 2-Channel Inputs Single Supply 2.7V to 5.5V Operation Low Supply Current (200µA) and Auto Shutdown Automatic Channel Selection (Ping-Pong) (LTC2422) No Latency: Digital Filter Settles in a Single Conversion Cycle 8ppm INL, No Missing Codes 4ppm Full-Scale Error 0.5ppm Offset 1.2ppm Noise Zero Scale and Full Scale Set for Reference and Ground Sensing Internal Oscillator—No External Components Required 110dB Min, 50Hz/60Hz Notch Filter Reference Input Voltage: 0.1V to VCC Live Zero—Extended Input Range Accommodates 12.5% Overrange and Underrange Pin Compatible with LTC2401/LTC2402 封装	应用 Weight Scales Direct Temperature Measurement Gas Analyzers Strain Gauge Transducers Instrumentation Data Acquisition Industrial Process Control 典型应用图参数

产品特点 Features

20-Bit ADCs in Tiny MSOP-10 Packages
1- or 2-Channel Inputs
Single Supply 2.7V to 5.5V Operation
Low Supply Current (200µA) and Auto Shutdown
Automatic Channel Selection (Ping-Pong) (LTC2422)
No Latency: Digital Filter Settles in a Single Conversion Cycle
8ppm INL, No Missing Codes
4ppm Full-Scale Error
0.5ppm Offset
1.2ppm Noise
Zero Scale and Full Scale Set for Reference and Ground Sensing
Internal Oscillator—No External Components Required
110dB Min, 50Hz/60Hz Notch Filter
Reference Input Voltage: 0.1V to VCC
Live Zero—Extended Input Range Accommodates 12.5% Overrange and Underrange
Pin Compatible with LTC2401/LTC2402

封装

应用

Weight Scales
Direct Temperature Measurement
Gas Analyzers
Strain Gauge Transducers
Instrumentation
Data Acquisition
Industrial Process Control

典型应用图

参数

LTC2421 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) *
LTC2421CMS	MSOP	10	C	$5.40	$4.35
LTC2421CMS#PBF	MSOP	10	C	$5.40	$4.35
LTC2421CMS#TR	MSOP	10	C		$4.41
LTC2421CMS#TRPBF	MSOP	10	C		$4.41
LTC2421IMS	MSOP	10	I	$6.10	$4.90
LTC2421IMS#PBF	MSOP	10	I	$6.10	$4.90
LTC2421IMS#TR	MSOP	10	I		$4.96
LTC2421IMS#TRPBF	MSOP	10	I		$4.96

LTC2421 数据手册及相关资料下载

数据手册(英文) : LTC2421/LTC2422 - 1-/2-Channel 20-Bit µPower No Latency Delta Sigma ADCs in MSOP-10.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