TransFeed
AVX Multilayer Ceramic Transient Voltage Suppressors
TVS Protection and EMI Attenuation in a Single Chip
PERFORMANCE CHARACTERISTICS
APPLICATIONS
? EMI Suppression
? Broadband I/O Filtering
? Vcc Line Conditioning
FEATURES
? Small Size
? Low ESR
? Ultra-fast Response Time
? Broad S21 Characteristics
MARKET SEGMENTS
? Computers
? Automotive
? Power Supplies
? Multimedia Add-On Cards
? Bar Code Scanners
? Remote Terminals
? Medical Instrumentation
? Test Equipment
? Transceivers
? Cellular Phones / Pagers
TYPICAL CIRCUITS REQUIRING
TRANSIENT VOLTAGE
PROTECTION AND EMI FILTERING
The following applications and schematic diagrams
show where TransFeed TVS/ EMI filtering devices might
be used:
? System Board Level Interfaces: (Fig. 1)
Digital to RF
Analog to Digital
Digital to Analog
? Voltage Regulation (Fig. 2)
? Power Conversion Circuits (Fig. 3)
? GaAs FET Protection (Fig. 4)
Fig. 1 – System Interface
Fig. 2 – Voltage Regulators
Sensor/Keyboard/
REGULATOR
+
Touchscreen Input
DIGITAL?
BOARD
By X Bus
RF BOARD
Fig. 3 – Power Conversion Circuits/Power Switching Circuits
+3.3V
MAIN?
POWER
POWER?
MANAGEMENT? +3.3V
INTERFACE?
CARD
Sensor Input
ANALOG?
BOARD
DIGITAL?
BOARD
Display
+5V
CHIP
+1.8V
+12V
Keyboard
DIGITAL?
BOARD
ANALOG?
BOARD
ASIC
Fig. 4 – GaAs FET Protection
SPECIFICATION COMPARISON
INPUT
OUTPUT
MLVF
0805
PARAMETER
MLV
0805
5ph
<600nh
<0.025Ω
100pf to 2.5nf
see VI curves
>0.25 x 10 12 Ω
Ls
Lp
Ron
C
Rv
Rp
typical
typical
typical
typical
typical
typical
N/A
<1.5nh
<0.1Ω
100pf to 5.5nf
see VI curves
>1 x 10 12 Ω
<250ps
Typical turn on time
<500ps
Typical frequency response
A comparison table showing typical element parameters and resulting
performance features for MLV and MLVF is shown above.
75
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