Datasheet 搜索 > 接口隔离器 > TI（德州仪器） > ISO7140CCDBQR 数据手册 > ISO7140CCDBQR 数据手册 16/32 页
器件3D模型￥ 10.91
ISO7140CCDBQR 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
接口隔离器
封装:
SSOP-16
描述:
4242 - VPK小尺寸和低功耗三核和四通道数字隔离器 4242-VPK Small-Footprint and Low-Power Triple and Quad Channels Digital Isolators
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P4Hot
典型应用电路图在P21P22P23P24
原理图在P1P16P20
封装尺寸在P27P29P30
标记信息在P27P28
封装信息在P26P27P28P29P30
技术参数、封装参数在P5P17P18
应用领域在P1P21P22P23P24P32
电气规格在P6P7
型号编号列表在P18
导航目录
ISO7140CCDBQR数据手册
Page:
of 32 Go
若手册格式错乱，请下载阅览PDF原文件
ISO7131CC
,
ISO7140CC
,
ISO7140FCC
,
ISO7141CC
,
ISO7141FCC
SLLSE83F –APRIL 2013–REVISED JANUARY 2015
www.ti.com
8 Detailed Description
8.1 Overview
The isolator in Figure 14 is based on a capacitive isolation barrier technique. The I/O channel of the device
consists of two internal data channels, a high-frequency channel (HF) with a bandwidth from 100 kbps up to
150 Mbps, and a low-frequency channel (LF) covering the range from 100 kbps down to DC. In principle, a
single-ended input signal entering the HF-channel is split into a differential signal through the inverter gate at the
input. The following capacitor-resistor networks differentiate the signal into transients, which then are converted
into differential pulses by two comparators. The comparator outputs drive a NOR-gate flip-flop whose output
feeds an output multiplexer. A decision logic (DCL) at the driving output of the flip-flop measures the durations
between signal transients. If the duration between two consecutive transients exceeds a certain time limit, (as in
the case of a low-frequency signal), the DCL forces the output-multiplexer to switch from the high- to the low-
frequency channel.
Because low-frequency input signals require the internal capacitors to assume prohibitively large values, these
signals are pulse-width modulated (PWM) with the carrier frequency of an internal oscillator, thus creating a
sufficiently high frequency signal, capable of passing the capacitive barrier. As the input is modulated, a low-pass
filter (LPF) is needed to remove the high-frequency carrier from the actual data before passing it on to the output
multiplexer.
8.2 Functional Block Diagram
Figure 14. Conceptual Block Diagram of a Digital Capacitive Isolator
16 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated
Product Folder Links: ISO7131CC ISO7140CC ISO7140FCC ISO7141CC ISO7141FCC
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
