ecmf series productpres web stcom

ECMFTM series portfolio overview
Common-mode filters embedding ESD protection
Is this presentation suited for you?
Where do you stand with common-mode noise filtering?
Beginner?
Intermediate?
Advanced?
I am not familiar with this
subject. I am in the
discovery phase and would
like an overview and a
basic understanding of the
technology.
I have a basic
understanding of this
subject. I would like to go
deeper in details and tackle
more aspects of this
subject.
I am very familiar with this
subject. I would like to
deepen my knowledge and
become an expert.
Click here to continue
to next slide
Click here to open
new presentation
Click here to open
new presentation
Overview
Basic
In depth
2
Purpose of common-mode filtering
• When subjected to common-mode noise, high-speed differential lines generate
unwanted radiated noise.
• Common-mode filters prevent differential lines from radiating and interfering
with other RF signals nearby.
Differential transmission
Radiated
noise is generated !
NO radiated noise
CMF
Emitter
X
Receiver
D+
D-
D1+
D1+
D1-
D1-
CMF symbol
Conduction noise
Ex : internal clock, …
Coupled noise
Ex : RF spike
Common mode sources
Noise + Skew
Ex : +100 ps on D-
3
Troubleshooting antenna desense
• The sensitivity of reception antennas is degraded by radiated noise from high-speed data
lines when there is:
• Proximity between the 2 elements
• Radiated common-mode noise at the antennas reception frequency spectrum
• By eliminating radiated common-mode noise, ECMF™ preserves the antenna sensitivity.
Example with Wi-Fi antenna / USB 3.0 port:
Without ECMF
Antenna wifi
With ECMF
Antenna wifi
D+
D+
D-
D-
X
CMF
High speed differential line
E.g. : USB3.0
Degraded sensitivity
Loss of connection
High speed differential line
E.g. : USB3.0
Sensitivity preserved
4
Think CMF…
When you have to implement high-speed lines
in your RF system, you need to think CMF
High-speed lines
Antenna
CMF
D-
•
•
•
•
•
•
MIPI
SATA
HDMI
DisplayPort
USB 2.0
USB 3.1
X
D+
Avoid desense
•
•
•
•
•
•
•
Wi-Fi
Bluetooth
GPS
WCDMA
LTE
Sub-GHz
ZigBee
5
… With integrated ESD protection
ESD protection
CMF
(Common-mode filter)
Low dispersion semiconductor
process
Advanced technology for
optimized performances
Very small size
High and deep rejection
Low clamping voltage
ECMFTM
6
Selection guide – ECMF™
DIFFERENTIAL BANDWIDTH
Peak rejection
frequency (> -20 dB)
(GHz)
Number
of lanes
complies with the following
standards
Part number
Speed Class 1
•
•
•
•
•
MIPI D-PHY (DSI & CSI)
USB 2.0, MHL 2.0
HDMI 1.4
DisplayPort™
SATA
1
2
3
0.70.9
ECMF02-3F3


ECMF02-2BF3


ECMF02-4CMX8

ECMF02-2HSMX6
1.5
1.82.4
ZCC21
@ 100 MHz
(Ω)
5
Speed
class
I
Package
type
Package size
XY
(mm)
II
24

Flip-Chip
0.83 x 1.33

14

Flip-Chip
0.83 x 1.23


16

µQFN-8L
1.20 x 2.50



µQFN-6L
1.50 x 1.70
ECMF02-2AMX6



µQFN-6L
1.50 x 1.70
ECMF02-3HSM6


30
 (*)
µQFN-6L
1.35 x 1.60

30
 (*) µQFN-10L
1.35 x 2.60
Speed Class 2
•
•
•
•
•
Speed Class 1
interfaces
MIPI M-PHY (DSI & CSI)
USB 3.0
USB 3.1
HDMI 2.0
ECMF04-4HSM10

ECMF04-4HSWM10

ECMF04-4AMX12



ECMF06-6HSM16


ECMF06-6AM16




16



50


30
16

30


15

µQFN-10L
1.35 x 2.60
µQFN-12L
1.50 x 3.30
 (*) µQFN-16L
1.35 x 4.10
µQFN-16L
1.35 x 3.30
7
Let’s go further
Basic presentation
Intermediate product presentation soon available:
‘Understanding ST’s ECMF™ series specification’
Application Notes:
In-depth information



Common-mode filters (AN4511)
Antenna desense on handheld equipment (AN4356)
MHL filtering and protection (AN4540)
Models - S parameters
Selection
 Selection guide [pdf]
 www.st.com/ecmf-ipad
8
9
Thank you
Similar pages