February 2017
DocID029426 Rev 2
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This is information on a product in full production.
www.st.com
BALF-112X-02D3
50 ohm nominal input / conjugate match balun CC1120,
CC1125, 433 MHz, with integrated harmonic filter
Datasheet - production data
Features
50 Ω nominal input / conjugate match to
CC1120, CC1125, CC1175, CC1200
Low insertion loss
Low amplitude imbalance
Low phase imbalance
Small footprint
Benefits
Very low profile (< 630 μm thickness)
High RF performance
RF BOM and size reduction
Applications
433 MHz impedance-matched balun filter
optimized for Texas Instruments® CC1120,
CC1125, CC1175, CC1200 sub-GHz RFICs
Description
STMicroelectronics' BALF-112X-02D3 is an
ultra-miniature balun, integrating both matching
network and harmonics filter.
Matching impedance has been customized for
the CC1120, CC1125, CC1175 and CC1200
transceivers from Texas Instruments.
The device uses STMicroelectronics' IPD
technology on a non-conductive glass substrate,
which optimizes RF performance.
Figure 1: Application schematic
C10 is a DC block capacitor: 0402/100 pF/50 V
Flip-Chip (8 bumps) package
Characteristics
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1 Characteristics
Table 1: Absolute maximum ratings (limiting values)
Symbol
Parameter
Value
Unit
Min.
Typ.
Max.
PIN
Input power RFIN
-
20
dBm
VESD
ESD ratings MIL STD883C (HBM: C = 100 pF,
R = 1.5 Ω, air discharge)
1300
-
V
ESD ratings machine model (MM: C = 200 pF,
R = 25 W, L = 500 nH)
250
-
TOP
Operating temperature
-40
-
+85
°C
Table 2: Electrical characteristics and RF performance (Tamb = 25 °C) RX balun
Symbol
Parameter
Value
Unit
Min.
Typ.
Max.
ZRX
Nominal differential impedance
Match to
CC112X
Ω
ZANT
Antenna impedance
50
Ω
f
Frequency range (bandwidth)
431
436
MHz
S21RX-ANT
Insertion loss in bandwidth
-1.9
-1.7
dB
S11ANT
Input return loss in bandwidth
-20
-18
dB
Phase_imbal
Output phase imbalance
0
1.7
10
°
Ampl_imbal
Output amplitude imbalance
0.3
1
dB
BALF-112X-02D3
Characteristics
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Table 3: Electrical characteristics and RF performance (Tamb = 25 °C) TX filter
Symbol
Parameter
Test condition
Value
Unit
Min.
Typ.
Max.
ZTX
Nominal TX impedance
Match to
CC112X
Ω
ZANT
Antenna impedance
50
Ω
f
Frequency range (bandwidth)
431
436
MHz
S21TX-ANT
Insertion loss in bandwidth
-1.5
-1.3
dB
S11ANT
Input return loss in bandwidth
-12
-10
dB
Att
Harmonic levels
Attenuation at 2 fo
-40
-26
dBm
Attenuation at 3 fo
-52
-46
Attenuation at 4 fo
-31
-30
Attenuation at 5 fo
-35
-32
Attenuation at 6 fo
-32
-28
Attenuation at 7 fo
-48
-44
Characteristics
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1.1 RF measurement
Figure 2: Insertion loss (RX balun)
Figure 3: Return loss antenna (RX balun)
Figure 4: Amplitude imbalance (RX balun)
Figure 5: Phase imbalance (RX balun)
Figure 6: TX filter transmission
Figure 7: Insertion loss (TX filter)
IL_RX(dB)
0
-2.5
-3.0
-2.0
-1.5
-0.5
431.0 431.5 432.0 434.0 434.5 435.0 435.5 436.0
-1.0
432.5 433.0 432.5
f (MHz)
431.0 431.5 432.0 434.0 434.5 435.0 435.5 436.0432.5 433.0 432.5
-5
-25
RL_antenna_RX (dB)
0
-20
-15
-10
f (MHz)
431.0 431.5 432.0 434.0 434.5 435.0 435.5 436.0432.5 433.0 432.5
Amplitude_lmb (dB)
1.0
-1.0
-0.5
0.0
0.5
f (MHz)
431.0 431.5 432.0 434.0 434.5 435.0 435.5 436.0432.5 433.0 432.5
10
-10
Phase_lmb (dB)
15
-15
-5
0
5
f (MHz)
Transmit_TX(dB)
0500 1000 1500 2000 2500 3000
0
-40
-60
-50
-30
-20
-10
3500 4000
f (MHz)
IL_TX(dB)
0
-2.5
-3.0
-2.0
-1.5
-0.5
431.0 431.5 432.0 434.0 434.5 435.0 435.5 436.0
-1.0
432.5 433.0 432.5
f (MHz)
BALF-112X-02D3
Characteristics
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Figure 8: fo attenuation (TX filter)
Figure 9: Return Loss antenna (TX filter)
Transmit_TX(dB)
800 1000 1200 1400 1600 1800 2000 2200
0
-40
-60
-50
-30
-20
-10
2400 2600 2800 3000 3200
f (MHz)
RL_antenna_TX(dB)
0
-20
-25
-15
-10
-5
f (MHz)
431.0 431.5 432.0 434.0 434.5 435.0 435.5 436.0432.5 433.0 432.5431.0 431.5 432.0 434.0 434.5 435.0 435.5 436.0432.5 433.0 432.5
Package information
BALF-112X-02D3
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2 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
2.1 Flip-Chip CSPG 0.4 package information
Figure 10: Flip-Chip CSPG 0.4 package outline
Table 4: Flip-Chip CSPG 0.4 mechanical data
Dimensions
Frequency
A1
A2
B1
B2
B3
C1
C2
C3
C4
D1
D2
D3
E1
BAL-112X-02D3
433 MHz
1950
1870
225
750
500
223
1424
820
604
425
205
630
255
D3
A1
A2
D1
D2
Top view
(balls down)
Z Z X
Y W W
G
LOGO + ECOPAK2 symbol
1st line
ZZ = Part Number
X = assembly site
2nd line
Y = year of production
WW = Weekof production
Dot indicates Ball #A1
C1
C1
B1 B1
C2
C3 C4
C1
C1
B2
B2
B3
B1 B1
E1
B3
B3
Bottomview
(ballsup)
BALF-112X-02D3
Package information
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Figure 11: Footprint -non solder mask defined
Figure 12: Footprint - solder mask defined
Figure 13: Ball assignment
Package information
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Table 5: Flip-Chip CSPG 0.4 ball description
Ball
Name
Designation
A1
GND
Ground
A3
LNA-
Connect to LNA_N
B3
LNA+
Connect to LNA_P
C1
ANT
Connect to antenna
D3
TRX_SW
Connect to TRX switch
E1
GND
Ground
E2
PA_C
Connect to PA output thru C10
E3
PA_OUT
Connect to PA
Figure 14: Application board EVB (4 layers)
BALF-112X-02D3
Package information
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Figure 15: Recommended balun land pattern
Table 6: Bill of material
Designation
Reference
Value
Package
Comments
L11
LQW15AN10NJ00D
56 nH
0402
Wire wounded
C10
39 pF
0402
50 V
R13
18 Ohms
0402
C44
56 pF
0402
50 V
U3
CC1121
DFN 5X5
U6
BALF-112X-02D3
FC 2 X 1.5
433 MHz
1800
micron
C10
L11
Connection
pads for
868MHz balun
Center to center distance bettween balun balls to QFN pad is 1.8 mm
Top metal balun pads diamter is 220 micron
Solder mask opening is 340 microns
GND clearance is 178 microns ( 7 mils)
This land pattern is also compatible with 433 MHz balun that will solder to the second row of pads.
Package information
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2.2 Flip-chip CSPG 0.4 packing information
Figure 16: Flip-chip CSPG 0.4 tape outline
BALF-112X-02D3
Ordering information
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3 Ordering information
Table 7: Ordering information
Order code
Marking
Package
Weight
Base qty.
Delivery mode
BALF-112X-02D3
TG
Flip-Chip CSPG 0.4
3.94 mg
5000
Tape and reel
4 Revision history
Table 8: Document revision history
Date
Revision
Changes
07-Jul-2016
1
First issue.
24-Feb-2017
2
Updated front page.
BALF-112X-02D3
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DocID029426 Rev 2
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