2006 Peregrine Semiconductor Corp. All rights reserved.
Page 1 of 8
Document No. 70-0045-04
www.psemi.com
The PE4126 is a high linearity, passive Quad MOSFET Mixer
for DCS 1800 Base Station Receivers exhibiting high dynamic
range performance over a broad LO drive range up to 20 dBm.
This mixer integrates passive matching networks to provide
single-ended interfaces for the RF and LO ports, eliminating
the need for external RF baluns or matching networks. The
PE4126 is optimized for frequency down-conversion using
low-side LO injection for DCS 1800 Base Station applications,
and is also suitable for use in up-conversion applications.
The PE4126 is manufactured on Peregrine's UltraCMOSTM
process, a patented variation of silicon-on-insulator (SOI)
technology on a sapphire substrate, offering the performance
of GaAs with the economy and integration of conventional
CMOS.
Product Specification
High Linearity Quad MOSFET Mixer
for DCS 1800 BTS
Product Description
Figure 1. Functional Diagram
PE4126
Features
Integrated, single-ended RF & LO
interfaces
High linearity: IIP3 of +32 dBm,
1700 - 1800 MHz (+17 dBm LO)
Low conversion loss: 7.9 dB
(+17 dBm LO)
High Isolation: typical LO-IF at 37 dB,
LO-RF at 38 dB (1.8 GHz)
Designed for low-side LO injection
Figure 2. Package Type
Table 1. AC and DC Electrical Specifications @ +25 C
(Z
S
= Z
L
= 50
)
Notes:
1. An IF frequency of 250 MHz is a nominal frequency. The IF frequency can be specified by the user as long as the
RF and LO frequencies are within the specified maximum and minimum.
2. Conversion Loss includes loss of IF transformer (M/ACom ETK4-2T - nominal loss 0.7 dB at 250 MHz.)
*Test conditions unless otherwise noted: LO = 250 MHz, LO input drive = 17 dBm, RF input drive = 3 dBm.
8-lead TSSOP
PE4126
RF
LO
IF
Parameter Minimum
Typical
Maximum Units
Frequency Range:
LO
RF
IF
1
1450
1700
--
--
--
250
1550
1800
--
MHz
MHz
MHz
Conversion Loss
2
7.9 8.3 dB
Isolation: LO-RF
1.7 GHz
1.75 GHz
1.8 GHz
30
32
34
34
36
38
dB
dB
dB
LO-IF 33
37
dB
Input IP3
30
32
dBm
Input 1 dB Compression
21
dBm
Product Specification
PE4126
Page 2 of 8
2006 Peregrine Semiconductor Corp. All rights reserved.
Document No. 70-0045-04
UltraCMOSTM RFIC Solutions
Table 2. Pin Descriptions
Table 3. Absolute Maximum Ratings
Electrostatic Discharge (ESD) Precautions
When handling this UltraCMOSTM device, observe
the same precautions that you would use with
other ESD-sensitive devices. Although this device
contains circuitry to protect it from damage due to
ESD, precautions should be taken to avoid
exceeding the rating specified.
Latch-Up Avoidance
Unlike conventional CMOS devices, UltraCMOSTM
devices are immune to latch-up.
Figure 3. Pin Configuration (Top View)
Absolute Maximum Ratings are those values
listed in the above table. Exceeding these values
may cause permanent device damage.
Functional operation should be restricted to the
limits in the DC Electrical Specifications table.
Exposure to absolute maximum ratings for
extended periods may affect device reliability.
PE4126
5
6
7
8
4
3
2
1
GND
RF
GND
LO
GND
IF2
IF1
GND
Pin
No.
Pin
Name
Description
1 LO
LO
Input
2 GND
Ground connection for Mixer. Traces
should be physically short and connect
immediately to ground plane for best
performance.
3 RF
RF
Input
4 GND
Ground.
5 GND
Ground.
6
IF2
IF differential output
7
IF1
IF differential output
8 GND
Ground.
Symbol Parameter/Conditions
Min
Max
Units
T
ST
Storage temperature range
-65
150
C
T
OP
Operating temperature
range
-40 85 C
P
LO
LO input power
20
dBm
P
RF
RF input power
16
dBm
V
ESD
ESD Sensitive Device
250
V
2006 Peregrine Semiconductor Corp. All rights reserved.
Product Specification
PE4126
Page 3 of 8
Document No. 70-0045-04
www.psemi.com
LO
IF
RF
4126
Eval
Board
Sig
Gen
Sig
Gen
Hybrid
Tee
3 dB
PA
Sig
Gen
3 dB
Spectrum
Analyzer
3 dB
6 dB
6 dB
Evaluation Kit
Figure 4. Evaluation Board Layout
Figure 5. Evaluation Board Schematic Diagram
Peregrine Specification 101/0054
Applications Support
If you have a problem with your evaluation kit or if
you have applications questions, please contact
applications support:
E-Mail: help@psemi.com (fastest response)
Phone: (858) 731-9400
Pin1
Figure 6. Evaluation Board Testing Block Diagram, 2-Tone Setup
T2 M/A-Com E-Series RF 4:1 Transformer 2.0 1000 MHz ETK4-2T
Table 4. Bill of Materials
IF
PE4126
GND
IF2
IF1
GND
GND
RF
GND
LO
Reference
Value / Description
T2
M/A Com ETK4-2T
U1 (Not Labeled)
PE4126 Mixer
R1
0
J1, J2, J3
SMA Connector
Product Specification
PE4126
Page 4 of 8
2006 Peregrine Semiconductor Corp. All rights reserved.
Document No. 70-0045-04
UltraCMOSTM RFIC Solutions
Typical Performance Data
(LO=17 dBm, RF=3 dBm, IF=250 MHz)
Figure 8. Input 1dB Compression vs. Frequency
Figure 9. Input IP3 vs. Frequency
Figure 7. Conversion Loss vs. Frequency
Figure 10. Output IP3 vs. Frequency
-10
-8
-6
-4
-2
0
1700
1720
1740
1760
1780
1800
C
o
n
v
er
s
i
o
n
Lo
s
s
(
d
B
)
Frequency (MHz)
85 C
25 C
-40 C
0
5
10
15
20
25
30
1700
1720
1740
1760
1780
1800
1d
B C
o
m
p
r
e
s
s
i
o
n (d
Bm
)
Frequency (MHz)
85 C
-40 C 25 C
0
10
20
30
40
1700
1720
1740
1760
1780
1800
II
P
3
(
d
B
m
)
Frequency (MHz)
-40 C 25 C
85 C
0
5
10
15
20
25
30
35
1700
1720
1740
1760
1780
1800
OI
P3
(
d
B
m
)
Frequency (MHz)
-40 C 25 C 85 C
2006 Peregrine Semiconductor Corp. All rights reserved.
Product Specification
PE4126
Page 5 of 8
Document No. 70-0045-04
www.psemi.com
Figure 12. LO-RF Isolation vs. Frequency
Figure 13. LO Port Return Loss @ 25C
Figure 11. LO-IF Isolation vs. Frequency
Figure 14. RF Port Return Loss @ 25C
Typical Performance Data
(LO=17 dBm, RF=3 dBm, IF=250 MHz)
-50
-40
-30
-20
-10
0
1700
1720
1740
1760
1780
1800
LO
-
I
F
I
s
o
l
at
i
on
(
d
B
)
Frequency (MHz)
25 C
85 C
-40 C
-50
-40
-30
-20
-10
0
1700
1720
1740
1760
1780
1800
LO
-
R
F
I
s
ol
a
t
i
on (
d
B)
Frequency (MHz)
-40 C
25 C
85 C
-25
-20
-15
-10
-5
0
1.3
1.35
1.4
1.45
1.5
1.55
1.6
Re
t
u
r
n
L
o
ss
(
d
B
)
Frequency (GHz)
-20
-15
-10
-5
0
1.6
1.65
1.7
1.75
1.8
1.85
1.9
Re
t
u
r
n
L
o
s
s
(
d
B
)
Frequency (GHz)
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