CM1214A Datasheet PDF - California Micro Devices

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CM1214A
California Micro Devices

Part Number CM1214A
Description 1 and 2 Channel PicoGuardTM AC Signal ESD Protector
Page 9 Pages


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CM1214A
1 and 2 Channel PicoGuardTM AC Signal ESD Protector
Features
• Single channel ESD protection for an AC signal up
to ±5V for 0.25W transmit power
• Connects two channels in series for signals up to
+10V (1W transmit power)
• ±8kV ESD protection per IEC 61000-4-2 contact
discharge
• Sub-1pF loading capacitance
• Minimal variation with voltage and temperature
• Each I/O pin can withstand over 1000 ESD strikes*
• SOT23-3 and MSOP-8 lead-free packages
Applications
• RF switch and amplifier protection
• RF modules and RF IC protection
• Wireless handsets and WLAN
• High-speed AC signals for Gbit Ethernet, etc.
Product Description
The CM1214A PicoGuard™ ESD protector is used to
protect bipolar signal lines against electrostatic
discharge (ESD). The CM1214A allows operation in
high-speed environments with signals levels up to ±5V.
The CM1214A comes in two versions:
• The CM1214A-01SO is a single channel ESD
protector and is available in a 3-lead SOT23-3
package.
• The CM1214A-02MR is a dual channel ESD
protector and is available in an 8-lead MSOP-8
package.
The low sub-1pF loading capacitance makes the
CM1214A-01SO ideal for protecting high-speed
interfaces including RF switches and amplifiers.
The CM1214A-02MR is ideal for dual high-speed
signal pairs used in Gigabit Ethernet, ADSL, etc. The
CM1214A-02MR can also be used for higher transmit
voltage applications by connecting the two channels in
series.
Both devices come in lead-free finishing.
Electrical Schematics
CH1
CH1
CH3
CH2
CM1214A-01SO
CH2
CH4
CM 1214A-02MR
*Standard test condition is IEC61000-4-2 level 4 test circuit with each pin subjected to ±8kV contact discharge for 1000 pulses. Discharges are timed at 1 second intervals and all 1000 strikes are completed in one continuous test
run. The part is then subjected to standard production test to verify that all of the tested parameters are within spec after the 1000 strikes.
© 2007 California Micro Devices Corp. All rights reserved.
490 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.cmd.com
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PACKAGE / PINOUT DIAGRAMS
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CM1214A
Top View
CH1
1
3 N.C.*
CH2
2
SOT23-3
CH1
N.C.*
N.C.*
CH3
Top View
18
27
36
45
MSOP-8
N.C.*
CH2
CH4
N.C.*
Notes:
1) These drawings are not to scale.
2) All N.C. pins must be left floating (i.e., not connected to the PCB). See applications section for more information.
SOT23-3 PACKAGE PIN DESCRIPTIONS
PIN NAME DESCRIPTION
1 CH1 ESD Channel
2 CH2 ESD Channel
3 N.C. No connect
Ordering Information
MSOP-8 PACKAGE PIN DESCRIPTIONS
PIN NAME DESCRIPTION
1 CH1 ESD Channel
2 N.C. No connect
3 N.C. No connect
4 CH3 ESD Channel
5 N.C. No connect
6 CH4 ESD Channel
7 CH2 ESD Channel
8 N.C. No connect
PART NUMBERING INFORMATION
Pins
Package
Lead-free Finish
Ordering Part Number1
Part Marking
3
SOT23
CM1214A-01SO
RF1S
8
MSOP
CM1214A-02MR
RF2S
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
© 2007 California Micro Devices Corp. All rights reserved.
2 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.cmd.com
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CM1214A
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
DC Voltage between CH pins
Operating Temperature Range
Storage Temperature Range
Package Power Rating
SOT23-3 Package (CM1214A-01SO)
MSOP8 Package (CM1214A-02MR)
RATING
7
–40 to +85
–65 to +150
225
400
UNITS
V
°C
°C
mW
mW
PARAMETER
Operating Temperature Range
STANDARD OPERATING CONDITIONS
RATING
–40 to +85
UNITS
°C
ELECTRICAL OPERATING CHARACTERISTICS (SEE NOTE 1)
SYMBOL
VST
VESD
ILEAK
RDYN
VCL
CIN
PARAMETER
Standoff Voltage
ESD Voltage Protection
Peak discharge voltage between
CH pins
a) Contact discharge per
IEC 61000-4-2 standard
Channel Leakage Current
Dynamic Resistance
Channel Clamp Voltage
Channel Input Capacitance
Voltage between CH pins = 0V
Voltage between CH pins = 5V
CONDITIONS
I=10μA
Notes 2, 3 and 4
TA=25°C, 5.5V between CH pins
TA=25°C, IPP = 1A, tP = 8/20μS; Any
I/O pin to Ground; Notes 2 and 5
TA=25°C, IPP = 1A, tP = 8/20μS;
Notes 2 & 5
Measured at 1MHz between CH
pins; Note 2 applies
MIN
±8
0.4
0.35
TYP
±7
±0.1
1.36
11.3
0.6
0.54
MAX
±1.0
0.9
0.8
UNITS
V
kV
μA
Ω
V
pF
pF
Note 1: All parameters specified at TA = 40°C to +85°C unless otherwise noted.
Note 2: These parameters guaranteed by design and characterization.
Note 3: Standard IEC 61000-4-2 with CDischarge = 150pF, RDischarge = 330Ω,.
Note 4: From CH pin with other CH pin grounded.
Note 5: No Connect pins are left open for all tests.
© 2007 California Micro Devices Corp. All rights reserved.
490 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.cmd.com
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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.
1.2
1.1
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0
Capacitance vs. Voltage (measured at 1MHz)
1234
Voltage [V]
5
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
012345678
Voltage [V]
Figure 2. CM1214A VI Characteristics, Low Current
10
9
8
7
6
5
4
3
2
1
0
01234567
Voltage [V]
Figure 3. CM1214A VI Characteristics,
Low Current, Pulse (clamping) Condition
8
Typical Capacitance
Temperature
Characteristics
vs.
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
0.600
0.580
0.560
0.540
0.520
-50
0V DC Input Bias
1.65V DC Input Bias
-25 0 25 50
Temperature (°C)
75
100
Figure 4. CM1214A Capacitance vs. Temperature
© 2007 California Micro Devices Corp. All rights reserved.
4 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.cmd.com
Issue A – 10/29/07



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