==
RMS =DC !"#$%J=
! 288
Glen Brisebois =Joseph Petrofsky
!"#$%&'()*+,-./0123
LTC 1966 !"!#$%&'()*+,-./01
!"#$%&'()=R MS == D C !"#$%&'()=∆∑ !"* LTC1966
!"#!$%&'()*+,-./%01
∆∑ !" #$%&'()*#+,J
!"#$%&'()*+,-./
!"#$%&'(
®
= R M S = D C !"#$!%&'()*
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-./.01
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!"#$L T C 1 9 6 6 LTC1966 !"#$%&'(
E !=EMI /= RFI F !"#$=4 !
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LTC1966 !"#$=1 a1b = =1 c== !"#$%&'(')*+,"#$%&
1VPEAKLTC1966 !"!#$%&'()
= 2 . 7 V =5.5V
!"# 155µA !"#$=5.5V
!=LTC1966 !
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J
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=RMS =DC /
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0.1µF
X7R
2.5V
2.7V/3V CMOS
OFF
ON
5V
VDD
DC + AC
INPUTS
(1VPEAK
DIFFERENTIAL)
IN1
VOUT
IN2 OUT RTN
CAVE
1µF
DC
OUTPUT
–5V
DN288 F01a
=1a=W==5V !" DC =====RMS DC 08/02/288
AC INPUT
(1VPEAK)
≥2V
IN1
VSS
OFF ON
–2.5V
≤–2V
EN VDD
VOUT
IN2 OUT RTN
CC
0.1µF
VSS GND EN
2.7V
EN VDD
LTC1966
LTC1966
!"
CAVE
1µF
DC
OUTPUT
GND
DN288 F01b
=1b=W=2.7V !"!AC !"#=RMS DC
DC + AC
INPUT
(1VPEAK)
LTC1966
IN1
DC
CAVE OUTPUT
1µF
VOUT
IN2 OUT RTN
VSS
GND
–2.5V
–2.5V
DN288 F01c
=1c=W =2.5V !" DC
!"#$=RMS DC LINEARITY ERROR (VOUT mV DC – VIN mV ACRMS)
VIN
VOUT
Dα
0.2
LTC1966, ∆Σ
0
∆-Σ
REF
–0.2
VIN
±1
–0.4
LPF
–0.6
CONVENTIONAL
LOG/ANTILOG
VOUT
DN288 F03
=3=W=LTC1966 !
–0.8
60Hz SINEWAVES
–1.0
0
50 100 150 200 250 300 350 400 450 500
VIN (mV ACRMS)
DN288 F02
=2=W= !"#$%
!
"#1
!"#$%&'()*
!"#$%&'()*+,-.
!
!"#$%&'()*+,-.- 1 = + 1 =/ !"#$%&'()*+,-./
!"#$%&'(")*+'(,-./0
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!"#$%&= 10%=30%
!=RMS !"#$
!
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./
!"#$%&= R M S !"#$%&!"'L T C 1 9 6 6 !"
!"#$%&'()*
!"
!"#$%&'(
=85kΩ !"#$= 0 . 5 % !"#$%&'
!"#$%&'()*+,-./#E !"#$%&'()*+,-./0123
!"#
!"#$%&J= !"#$%&'()*
!=D C !"#$%&'()=R M S !"#= DC F==LTC1966 =AC = ∆∑ !"#$%&'(
)*+,-./
LTC1966 RMS DC LTC1966 =∆∑ !"#$%&'()(*+,-!".
=V O U T = =∆ ∑ = ! " # $ % & ' ( ) *
2
E =V I N F / V OUT ∆∑ !"#$RMS =D C !"#$%&'(=2 !"#$%&'()
!"#$%&=1
*+,- !"#
!"#!$%& OOT ! NSNM 200003
(86)21-6375-9478
(86)21-6375-9479
!"#$%
Cytech Technology Ltd.
www.cytecht.com
!"(852)2375-8866
!"(010)8268-4280
!"(028)522-4111
!"(023)6860-8938
!"(020)8762-7232
!"(025)481-0877
!"(021)6440-1373
!"(0755)386-7431
!"(029)848-1716
!"(027)8736-0546
!"#$%&'()*+,(-./*
=VIN 4 VOUT∆∑ !"#$%=0%
.
LTC1966 =R MS =D C !"#$%
!"#$=R MS &'()*+,-./01
!"#$%&'()*+,-./0%12
!"#$%&'()*+,-=LTC1966 !=RMS =DC !"#$%&'(
!"#$%&'()RMS=DC
!"#$%&'()*+,&-.
!"#$%&'()www.linear.com.cn
[email protected]
http://www.linear.com.cn/go/dnLTC1966
!"#
Linear Technology Corporation Ltd.
www.linear.com.cn
!"#$#% OOP !" O ONMU (852)2428-0303
(852)2348-0885
!"#$%&'()*+,-./0123
100% !"#$
!"#$%&E3F (852)2375-7700
(010)8268-4277
(028)523-9451
(023)6860-8938
(020)8762-7227
(025)480-8023
(021)6440-0166
(0755)386-7954
(029)848-0985
(027)8736-0547
!"#$ ! !"#$%
Unique-A Division of Memec (Asia Pacific) Ltd.
www.unique-ap.com
[email protected]
!"(852)2410-2778
!"(010)8519-1866
!"(028)620-0026
!"(021)6317-8226
!"(0755)366-4329
!"(027)8732-2646
!"(0592)516-4701
!"(029)822-9180
!"(0532)582-1322
(852)2370-3247
(010)8519-1865
(028)620-0027
(021)6317-3446
(0755)366-4330
(027)8732-2729
(0592)516-4702
(029)825-8595
(0532)582-1322
dn288f 0601 35K • PRINTED IN CHINA
LINEAR TECHNOLOGY CORPORATION 2002