PRELIMINARY
CM1214
1 and 2 Channel
PicoGuard
TM
AC Signal ESD Protector
Features
•
•
•
•
•
•
•
•
Single channel ESD protection for an AC signal up
to ±5V for 0.25W transmit power
Connect 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
Can withstand over 1000 ESD strikes at 8kV
DFN-3, SOT23-3 and MSOP-8 package options
Lead-free versions available
Product Description
The CM1214
PicoGuard
TM
ESD protector is used to
protect bipolar signal lines against electrostatic dis-
charge (ESD). The CM1214 allows operation in high-
speed environments with signals levels up to +5V. The
low sub-1pF loading capacitance makes the CM1214-
01DF/DE and CM1214-01ST/SO ideal for protecting
high-speed interfaces including RF switches and
amplifiers. The CM1214-02MS/MR is ideal for dual
high-speed signal pairs used in Gigabit Ethernet,
ADSL, etc. The CM1214-02MS/MR can also be used
for higher transmit voltage applications by connecting
the two channels in series.
The CM1214-01DF/DE and the CM1214-01ST/SO are
single channel ESD protectors available in a 3-lead
DFN-3 and SOT23-3 packages respectively. The
CM1214-01DF/DE is housed in a very small form fac-
tor DFN package that provides up to 20% and 32%
board space savings when it is used in place of SC70
and SOT23 packages. The CM1214-02MS/MR is a
dual channel ESD protector and is available in an 8-
lead MSOP-8 package. All three devices are available
with optional lead-free finishing.
Applications
•
•
•
•
RF switch and amplifier protection
RF modules and RF IC protection
Wireless handsets and WLAN
High-speed AC signals for Gbit Ethernet, etc.
Electrical Schematics
CH1
CH1
CH3
CH2
CM1214-01ST/SO
CM1214-01DF/DE
©
2005 California Micro Devices Corp. All rights reserved.
03/25/05
CH2
CH4
CM1214-02MS/MR
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
1
PRELIMINARY
CM1214
PACKAGE / PINOUT DIAGRAMS
Top View
3
Top View
CH2
CH1
1
Top View
CH1
1
8
N.C.
CH2
CH4
N.C.
RF2/
RF2R
RF1/
RF1R
N.C.
1
3
N.C.
N.C.
N.C.
CH3
2
3
4
7
6
5
DFN-3
Note: These drawings are not to scale.
SOT23-3 PACKAGE PIN DESCRIPTIONS
PIN
1
2
3
NAME DESCRIPTION
CH1
CH2
N.C.
ESD Channel
ESD Channel
No connect
PIN
1
2
3
4
5
6
7
8
DFN-3 PACKAGE PIN DESCRIPTIONS
PIN
1
2
3
NAME DESCRIPTION
N.C.
CH1
CH2
No connect
ESD Channel
ESD Channel
Ordering Information
PART NUMBERING INFORMATION
Standard Finish
Pins
3
3
8
Package
DFN
SOT23
MSOP
Ordering Part
Number
1
CM1214-01DF
CM1214-01ST
CM1214-02MS
Part Marking
RD
RF1
RF2
Lead-free Finish
Ordering Part
Number
1
CM1214-01DE
CM1214-01SO
CM1214-02MR
Part Marking
RG
RF1R
RF2R
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
©
2005 California Micro Devices Corp. All rights reserved.
RD /
RG
2
CH1
CH2
2
SOT23-3
MSOP-8
MSOP-8 PACKAGE PIN DESCRIPTIONS
NAME DESCRIPTION
CH1
N.C.
N.C.
CH3
N.C.
CH4
CH2
N.C.
ESD Channel
No connect
No connect
ESD Channel
No connect
ESD Channel
ESD Channel
No connect
2
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
03/25/05
PRELIMINARY
CM1214
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
DC Voltage between CH pins
Operating Temperature Range
Storage Temperature Range
Package Power Rating
DFN-3 Package (CM1214-01DF/DE)
SOT23-3 Package (CM1214-01ST/SO)
MSOP8 Package (CM1214-02MS/MR)
RATING
7
-40 to +85
-65 to +150
TBD
225
400
UNITS
V
°C
°C
mW
mW
mW
STANDARD OPERATING CONDITIONS
PARAMETER
Operating Temperature Range
RATING
-40 to +85
UNITS
°C
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE 1)
SYMBOL
V
ST
V
ESD
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 Input Capacitance
Voltage between CH pins = 0V
Voltage between CH pins = 5V
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
All parameters specified at T
A
= -40°C to +85°C unless otherwise noted.
These parameters guaranteed by design and characterization.
Standard IEC 61000-4-2 with C
Discharge
= 150pF, R
Discharge
= 330Ω,.
From CH pin with other CH pin grounded.
No Connect pins are left open for all tests.
CONDITIONS
I=10µA
Notes 2, 3 and 4
MIN
TYP
±7
MAX
UNITS
V
±8
T
A
=25°C, 5.5V between CH pins
I = 1A, T
A
=25°C;
Measured at 1 MHz between CH
pins; Note 2 applies
0.5
0.5
0.8
0.8
1.2
1.2
±0.1
1.5
±1.0
kV
µA
Ω
I
LEAK
R
DYN
C
IN
pF
pF
©
2005 California Micro Devices Corp. All rights reserved.
03/25/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
3
PRELIMINARY
CM1214
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 CM1214 experiences a sym-
metrical I/V curve, without any snapback or trigger volt-
age. The curve shows only one polarity.
Capacitance vs. Voltage (measured at 1MHz)
1.5
1.4
2
Capacitance [pF]
1.3
1.1
1
0.9
0.8
0.7
0.6
0.5
0
1
2
3
4
5
Current [A]
1.2
1.5
1
0.5
0
0
2
4
6
8
10
12
Voltage [V]
Voltage [V]
Figure 1. CM1214 Capacitance vs. Voltage
Typical Voltage Current (VI) Characteristics (low
current)
Figure 2
shows how the CM1214 experiences a sym-
metrical I/V curve, without any snapback or trigger volt-
age. It gradually starts to turn on at about 6V and
clamps above 7V.
Figure 3. CM1214 VI Characteristics,
Low Current, Pulse (clamping) Condition
10
9
8
7
6
5
4
3
2
1
0
0
1
2
3
4
5
6
7
8
Current [uA]
Voltage [V]
Figure 2. CM1214 VI Characteristics, Low Current
©
2005 California Micro Devices Corp. All rights reserved.
4
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
03/25/05
PRELIMINARY
CM1214
Performance Information (cont’d)
Typical Filter Performance (nominal conditions unless specified otherwise, 50 Ohm Environment)
Figure 4. Insertion Loss vs. Frequency (0V DC Bias)
Figure 5. Insertion Loss vs. Frequency (2.5V DC Bias)
©
2005 California Micro Devices Corp. All rights reserved.
03/25/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
5
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