Philips PM2519 - OQ 0068 RMS CONVERTER

OQ 0068 RMS CONVERTER
Vp GND VN
RMS CIRCUIT
AZC
CIRCUIT
CURRENT
RECTIFIER
11 | PROT
DUAL
V TOI
CONVERTER
CEIZC OUT|9
CFIZC SEL 110
crize SEL [10] [3 ]crrzc ouT
0G0068
ST4470
840727
RNG_SEL{ 15
Pin nr. Name Description
1 RB Range resistor B
2 RB Range resistor B
3 1 Input 1
4 RA Range resistor A
5 VN Negative supply
6 CAZ Autozero capacitor
7 CAZ Autozero capacitor
8 GND Ground
9 CF/ZC OUT Digital output
10 CF/ZC SEL Digital output select
11 PROT Input protection clamp
12 CRMS Integrating capacitor
13 JOUT Current output
14 VP Positive supply
15 RNG SEL Range selection
16 ENA Enable input
7 $2 Input 2
18 RA Range resistor A
OPERATION MODES
ENA SEL CF/ZC SEL RNG
1 x x
0 1 0
0 a 1
ie) 0 0
0 0 1
FUNCTION
Power down mode
Low range Measurement mode
High range Measurement mode
Low: range Counter mode
High range Counter mode
10-9