AD534 Analog Devices, AD534 Datasheet - Page 9

• Manufacturer Part Number: AD534
• Description: Internally Trimmed Precision IC Multiplier
• Manufacturer: Analog Devices

REV. B
5V RMS FS
10V PEAK
100mV TO 10V
Figure 15. Wideband, High-Crest Factor, RMS-to-DC Converter
INPUT
Figure 14. Differential-Input Voltage-to-Frequency Converter
CONTROL
RMS + DC
INPUT, E
MODE
AC RMS
CALIBRATION PROCEDURE:
WITH 'MODE' SWITCH IN 'RMS + DC' POSITION, APPLY AN INPUT OF +1.00VDC.
ADJUST ZERO UNTIL OUTPUT READS SAME AS INPUT. CHECK FOR INPUTS
OF
ACCURACY IS MAINTAINED FROM 60Hz TO 100kHz, AND IS TYPICALLY HIGH
BY 0.5% AT 1MHz FOR V
PROVIDED THAT THE PEAK INPUT IS NOT EXCEEDED, CREST-FACTORS UP
TO AT LEAST TEN HAVE NO APPRECIABLE EFFECT ON ACCURACY .
INPUT IMPEDANCE IS ABOUT 10k ; FOR HIGH (10M ) IMPEDANCE, REMOVE
MODE SWITCH AND INPUT COUPLING COMPONENTS.
FOR GUARANTEED SPECIFICATIONS THE AD536A AND AD636 ARE OFFERED
AS A SINGLE PACKAGE RMS-TO-DC CONVERTER.
CALIBRATION PROCEDURE:
WITH E
TRIMMER CAPACITOR TO SET f = 8.000kHz. LINEARITY WILL TYPICALLY BE
WITHIN
DUE TO DELAYS IN THE COMPARATOR, THIS TECHNIQUE IS NOT SUITABLE
FOR MAXIMUM FREQUENCIES ABOVE 10kHz. FOR FREQUENCIES ABOVE
10kHz THE AD537 VOLTAGE-TO-FREQUENCY CONVERTER IS RECOMMENDED.
A TRIANGLE-WAVE OF
USED AS AN OUTPUT, A VOLTAGE-FOLLOWER SHOULD BE INTERPOSED.
C
10V; OUTPUT SHOULD BE WITHIN
+
–
C
NONPOLAR
= 1.0V, ADJUST POT TO SET f = 1.000kHz. WITH E
0.1% OF FS FOR ANY OTHER INPUT.
10 F
10k
SF
X
X
Y
Y
1
2
1
2
AD534
IN
OUT
5V PK APPEARS ACROSS THE 0.01 F CAPACITOR; IF
20k
+V
–V
SF
X
X
Y
= 4V RMS (SINE, SQUARE OR TRIANGULAR-WAVE).
Y
Z
Z
1
2
1
2
S
2
S
1
AD534
20k
+15V
–15V
OUT
500
+V
–V
–9–
Z
Z
ADJ
1kHz
S
2
S
1
(= R)
0.05% (5mV).
–15V
2.2k
39k
AD741K
+15V
(= C)
0.01
10k
10k
10k
MATCHED TO 0.025%
ADJ 8kHz
3
ZERO
2
ADJ
3-30p
PINS 5, 6, 8 TO +15V
PINS 1, 4 TO –15V
10M
f =
–
+
= 1kHz PER VOLT
C
10 F SOLID Ta
AD211
WITH VALUES SHOWN
= 8.0V ADJUST
E
40
82k
C
–
+
5k
7
+15V
+15V
CR
AD741J
1
10k
2k
+
OUTPUT
15V APPROX.
OUTPUT
0 TO +5V
AD534