IC-RC1000_14 Datasheet, PDF (9/14 Pages) IC-Haus GmbH – SIN/COS SIGNAL SAFETY MONITOR IC

iC-RC1000
SIN/COS SIGNAL SAFETY MONITOR IC
Rev C2, Page 9/14
Single-ended application
Signals referring to ground with double amplitude (400 bis 600 mV) can also be monitored; for this purpose the
negative input must be kept in the permissible common mode range (e.g. at VCC/2).
VCC1
VCC2
PSIN
51kΩ
VCC1
PSIN
VCC2
PCOS
NSIN
iC-RC1000
PCOS
OK
ERR
OK
ERR
GND
51kΩ
NCOS
GND
Figure 4: Single-ended application
GND
Monitoring of phase shift
The phase shift between SIN (PSIN-NSIN) and COS (PCOS-NCOS) can be monitored only indirectly, what
leads to limitations. The following table shows the phase error tolerance for different input frequencies. Any
larger phase shift results in an error message.
0.8 Vpp
1.0 Vpp
1.2 Vpp
1 Hz
±18 °
±34 °
±9 °
10 Hz
±18 °
±34 °
±9 °
100 Hz
±18 °
±34 °
±9 °
1 kHz
±18 °
±34 °
±9 °
10 kHz
±20 °
±36 °
±10 °
100 kHz
±33 °
±50 °
±15 °
200 kHz
±48 °
±65 °
±22 °
300 kHz
±75 °
*
±25 °
400 kHz
*
*
±35 °
500 kHz
*
*
±45 °
Table 5: Permissible phase error ∆PHI between SIN and COS for different input frequencies (without series
resistors); *) No error message (OK = 1 and ERR = 0)