LTC2428是4-/8-Channel 20-Bit μPower No Latency Delta-Sigma? ADC

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LTC2428 - LTC2428是4-/8-Channel 20-Bit μPower No Latency Delta-Sigma? ADC

LTC2428是Linear公司的一款无延迟增量累加 ADC产品，LTC2428是4-/8-Channel 20-Bit μPower No Latency Delta-Sigma? ADC，本站介绍了LTC2428的封装应用图解、特点和优点、功能等，并给出了与LTC2428相关的凌力尔特元器件型号供参考。

LTC2428 - 4-/8-Channel 20-Bit μPower No Latency Delta-Sigma? ADC

LTC2428 - 4-/8-Channel 20-Bit μPower No Latency Delta-Sigma? ADC - Linear Technology（凌力尔特）

功能描述

The LTC2424/LTC2428 are 4-/8-channel 2.7V to 5.5V micropower 20-bit A/D converters with an integrated oscillator, 8ppm INL and 1.2ppm RMS noise. They use delta-sigma technology and provide single cycle digital filter settling time (no latency delay) for multiplexed applications. The first conversion after the channel is changed is always valid. Through a single pin the LTC2424/LTC2428 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 800Hz. The internal oscillator requires no external frequency setting components.

The converters accept any external reference voltage from 0.1V to VCC. With their extended input conversion range of -12.5% VREF to 112.5% VREF (VREF = FSSET - ZSSET) the LTC2424/LTC2428 smoothly resolve the offset and overrange problems of preceding sensors or signal conditioning circuits.

The LTC2424/LTC2428 communicate through a flexible 4-wire digital interface which is compatible with SPI and MICROPOWER? protocols.

特点

Pin Compatible 4-/8-Channel 20-Bit ADCs

8ppm INL, No Missing Codes at 20 Bits

4ppm Full-Scale Error and 0.5ppm Offset

1.2ppm Noise

Digital Filter Settles in a Single Cycle. Each

Conversion is Accurate, Even After Changing Channels

Fast Mode: 16-Bit Noise, 12-Bit TUE at 100sps

Internal OscillatorNo External Components

Required

110dB Min, 50Hz/60Hz Notch Filter

Reference Input Voltage: 0.1V to VCC

Live ZeroExtended Input Range Accommodates

12.5% Overrange and Underrange

Single Supply 2.7V to 5.5V Operation

Low Supply Current (200μA) and Auto Shutdown

Can Be Interchanged with 24-Bit LTC2404/LTC2408

if ZSSET Pin is Grounded

应用

Weight Scales

Direct Temperature Measurement

Gas Analyzers

Strain-Gage Transducers

Instrumentation

Data Acquisition

Industrial Process Control

4-Digit DVMs

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)
LTC2428CG	SSOP-28	C	$6.20	$5.25
LTC2428CG#PBF	SSOP-28	C	$6.20	$5.25
LTC2428CG#TR	SSOP-28	C		$5.35
LTC2428CG#TRPBF	SSOP-28	C		$5.35
LTC2428IG	SSOP-28	I	$6.80	$5.75
LTC2428IG#PBF	SSOP-28	I	$6.80	$5.75
LTC2428IG#TR	SSOP-28	I		$5.85
LTC2428IG#TRPBF	SSOP-28	I		$5.85