CM1214A Datasheet, PDF (4/9 Pages) California Micro Devices Corp – 1 and 2 Channel PicoGuardTM AC Signal ESD Protector

CM1214A
Performance Information
Typical Capacitance Characteristics vs. Voltage
Figure 1 illustrates how the loading capacitance
remains mainly flat across the voltage range from 0V to
5V, the voltage between CH pins.
Typical Voltage-Current (VI) Characteristics (high
current, pulse condition)
Figure 3 shows how the CM1214A experiences a
symmetrical I/V curve, without any snapback or trigger
voltage. The curve shows only one polarity.
Capacitance vs. Voltage (measured at 1MHz)
1.2
1.1
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0
1
2
3
4
5
Voltage [V]
Figure 1. CM1214A Capacitance vs. Voltage
Typical Voltage Current (VI) Characteristics (low
current)
Figure 2 shows how the CM1214A experiences a
symmetrical I/V curve, without any snapback or trigger
voltage. It gradually starts to turn on at about 6V and
clamps about 7V.
10
9
8
7
6
5
4
3
2
1
0
0
1
2
3
4
5
6
7
8
Voltage [V]
Figure 2. CM1214A VI Characteristics, Low Current
10
9
8
7
6
5
4
3
2
1
0
0
1
2
3
4
5
6
7
8
Voltage [V]
Figure 3. CM1214A VI Characteristics,
Low Current, Pulse (clamping) Condition
Typical Capacitance Characteristics vs.
Temperature
Figure 4 illustrates the loading capacitance for both
0VDC and 1.65VDC input across the -40 to 85°C
temperature range.
0.660
0.640
0.620
0V DC Input Bias
1.65V DC Input Bias
0.600
0.580
0.560
0.540
0.520
-50
-25
0
25
50
75
100
Temperature (°C)
Figure 4. CM1214A Capacitance vs. Temperature
© 2007 California Micro Devices Corp. All rights reserved.
4
490 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: [phone] ● Fax: [phone] ● www.cmd.com
Issue A – 10/29/07