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

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

LTC2421是Linear公司的一款无延迟增量累加 ADC产品，LTC2421是1-/2-Channel 20-Bit μPower No Latency Delta Sigma? ADCs in MSOP-10，本站介绍了LTC2421的封装应用图解、特点和优点、功能等，并给出了与LTC2421相关的凌力尔特元器件型号供参考。

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

LTC2421 - 1-/2-Channel 20-Bit μPower No Latency Delta Sigma? ADCs in MSOP-10 - Linear Technology（凌力尔特）

功能描述

The LTC2421/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.

特点

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

应用

Weight Scales

Direct Temperature Measurement

Gas Analyzers

Strain Gauge Transducers

Instrumentation

Data Acquisition

Industrial Process Control

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LTC2421CMS	MS-10	C	$5.40	$4.35
LTC2421CMS#PBF	MS-10	C	$5.40	$4.35
LTC2421CMS#TR	MS-10	C		$4.41
LTC2421CMS#TRPBF	MS-10	C		$4.41
LTC2421IMS	MS-10	I	$6.10	$4.90
LTC2421IMS#PBF	MS-10	I	$6.10	$4.90
LTC2421IMS#TR	MS-10	I		$4.96
LTC2421IMS#TRPBF	MS-10	I		$4.96