Datasheet

26
LTC1968
1968f
TYPICAL APPLICATIO S
U
SI PLIFIED SCHE ATIC
WW
5V Single Supply, Differential,
AC-Coupled RMS-to-DC Converter
Single Supply RMS Current Measurement
V
+
5V
LTC1968
IN1 DC OUTPUT
C
AVE
10µF
C
C
1µF
IN2
1968 TA02
V
OUT
AC INPUTS
(1V
PEAK
DIFFERENTIAL)
OUT RTN
GND EN
V
+
LTC1968
IN1
V
OUT
= 4mV
DC
/A
RMS
C
AVE
10µF
0.1µF
IN2
1968 TA03
V
OUT
AC CURRENT
75A MAX
50Hz TO 400Hz
OUT RTN
GND EN
10k
10k
10Ω
T1: CR MAGNETICS CR8348-2500-N
www.crmagnetics.com
T1
2nd ORDER ∆Σ MODULATOR
IN1
IN2
EN
V
+
–
+
–
+
OUTPUT
OUT RTN
50k
BLEED RESISTOR
FOR C
AVE
C
AVE
1968 SS
TO BIAS CONTROL
GND
∫
∫
C1
C2
Y1 Y2
C12
C11
CLOSED
DURING
SHUTDOWN
C9
C10
C5C3
C4
C6
C8
C7
A2A1