LTC1967 精准扩展带宽、RMS 至 DC 转换器

The LTC®1967 is a true RMS-to-DC converter that uses an innovative delta-sigma computational technique. The benefits of the LTC1967 proprietary architecture when compared to conventional log-antilog RMS-to-DC converters are higher linearity and accuracy, bandwidth independent of amplitude and improved temperature behavior.

The LTC1967 operates with single-ended or differential input signals (for EMI/RFI rejection) and supports crest factors up to 4. Common mode input range is rail-to-rail. Differential input range is 1VPEAK, and offers unprecedented linearity. The LTC1967 allows hassle-free system calibration at any input voltage.

The LTC1967 has a rail-to-rail output with a separate output reference pin providing flexible level shifting; it operates on a single power supply from 4.5V to 5.5V. A low power shutdown mode reduces supply current to 0.1µA.

The LTC1967 is packaged in the space-saving MSOP package, which is ideal for portable applications.

Protected under U.S. Patent Numbers 6,359,576, 6,362,677 and 6,516,291

产品特点 Features

High linearity:
0.02% linearity Allows Simple System Calibration
Wide Input Bandwidth:
Bandwidth to 0.1% Additional Gain Error: 40kHz
Bandwidth Independent of Input Voltage Amplitude
No-Hassle Simplicity:
True RMS-DC Conversion with Only One External Capacitor
Delta Sigma Conversion Technology
Low Supply Current:
330µA Typ
Ultralow Shutdown Current:
0.1µA
Flexible Inputs:
Differential or Single Ended
Rail-to-Rail Common Mode Voltage Range
Up to 1VPEAK Differential Voltage
Flexible Output:
Rail-to-Rail Output
Separate Output Reference Pin Allows Level Shifting
Small Size:
Space Saving 8-Pin MSOP Package

应用

True RMS Digital Multimeters and Panel Meters
True RMS AC + DC Measurements

典型应用图

参数

LTC1967 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) *
LTC1967CMS8	MSOP	8	C	$4.49	$3.40
LTC1967CMS8#PBF	MSOP	8	C	$4.49	$3.40
LTC1967CMS8#TR	MSOP	8	C		$3.46
LTC1967CMS8#TRPBF	MSOP	8	C		$3.46
LTC1967IMS8	MSOP	8	I	$7.59	$5.69
LTC1967IMS8#PBF	MSOP	8	I	$7.59	$5.69
LTC1967IMS8#TR	MSOP	8	I		$5.75
LTC1967IMS8#TRPBF	MSOP	8	I		$5.75

LTC1967 数据手册及相关资料下载

数据手册(英文) : LTC1967 - Precision Extended Bandwidth, RMS-to-DC Converter.PDF
应用指南 (英文) : AN106 - Instrumentation Circuitry Using RMS-to-DC Converters.PDF
设计要点 (英文) : DN362 - Precision LVDT Signal Conditioning Using Direct RMS to DC Conversion.PDF
设计要点 (中文) : DN362 - 采用直接 RMS 至 DC 转换的精准 LVDT 信号调理.PDF
可靠性数据 : R415 Reliability Data .PDF
产品选型卡 : Precision High Side Current Sense Amplifiers.PDF