TCM1520A Datasheet, PDF (4/7 Pages) Texas Instruments – RING DETECTOR

TCM1520A
RING DETECTOR
SCTS005B – OCTOBER 1984 – REVISED DECEMBER 1990
PARAMETER MEASUREMENT INFORMATION
VIrms = 40 V to 150 V
0.47 µF,
TCM1520A
350 V
1 AC
INPUT
5-V OUTPUT ⁴
2.2 kΩ
VID
8 AC
INPUT
INVERTING ²
OUTPUT
6
C FILTER
10 µF,
50 V
COMMON
3
7
Output
10 kΩ
Figure 1. Switching Test Circuit
TYPICAL CHARACTERISTICS
CAPACITOR VOLTAGE (C FILTER)
vs
DIFFERENTIAL INPUT VOLTAGE
(AC INPUT, PINS 1 AND 8)
18
TA = 25°C
15
OUTPUT VOLTAGE (5-V OUTPUT)
vs
CAPACITOR VOLTAGE (C FILTER)
6
TA = 25°C
5
12
4
Comparator
Switch Fires
9
3
6
6.8-V Zener Diode
Starts to Conduct
3
0
8
10
12
14
16
18
20
VID – Differential Input Voltage – V
Figure 2
2
1
Comparator
Switch Fires
0
4
5
6
7
8
9
10
Capacitor Voltage – V
Figure 3
4
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