The HMC596LP4 & HMC596LP4E are low-cost 4x2
switch matrices in leadless QFN 4x4 mm surface
mount packages for use in Satellite / DBS, LNBs
and multiswitches from 200 to 3000 MHz. A positive
voltage controlled 4 bit decoder is integrated on the
switch. The switches may be used in either 75 ohm or
50 ohm systems.
Both switch outputs (OP1 & OP2) can independently
select any of the four inputs (HH, HL, VH, VL) or
simultaneously select the same inputs. Note that the
switch is bi-directional and input/output functionality
may be interchanged. All data presented was
measured in a 50 ohm (input/output) system.
9 - 358
Electrical Specifications, T
ParameterConditionsFrequencyMin.Typ.Max.Units
Insertion Loss
Isolation
Return Loss (VL, HL, VH, HH)Input Selected
Return Loss (VL, HL, VH, HH)Input Deselected
= +25° C, Vdd= +5V, 50 Ohm System
A
200 - 950
950 - 2150
2150 - 3000
200 - 9504250dB
950 - 14503745dB
1450 - 2150
2150 - 3000
200 - 950
950 - 2150
2150 - 3000
200 - 950
950 - 2150
2150 - 3000
25
10
6
6.5
7. 5
43
40
30
7
15
12
17
22
18
7
8
9
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VL to OP1 (state 1)
VL to OP1 (state 2)
VH to OP1 (state 5)
VH to OP1 (state 6)
HL to OP1 (state 11)
HL to OP1 (state 12)
HH to OP1 (state 15)
HH to OP1 (state 16)
FREQUENCY (GHz)
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The HMC596LP4(E) requires DC blocks on all 6 RF ports (OP1, OP2, VL, HL, VH, HH). Characterization on the
HMC596LP4(E) was done using 0402 size 330pF capacitors on all RF ports. A 1,000 pF DC decoupling capacitor
(0603 size) is recommended for the Vdd pin.
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Package bottom has exposed metal paddle
that must be connected to PCB RF ground.
Switch RF Input. This pin is DC coupled and should be DC
blocked externally using a series capacitor. Select value
based on lowest frequency of operation.
Switch RF Input. This pin is DC coupled and should be DC
blocked externally using a series capacitor. Select value
based on lowest frequency of operation.
Control Inputs. See truth and control voltage table.
Switch Application Circuit for 4x4 Switch Matrix
9 - 364
The HMC596LP4(E) switch can operate as a 4x4 switch by
connecting the 4 inputs of two switches directly together.
The VL, VH, HL, and HH inputs of the rst switch should be
connected to the second switch, as illustrated.
Mirror image switch performance can be realized by inverting the HV1 & HV2 logic control signals of one of the
HMC596LP4(E) switches.
The input loading impedance of two switches in parallel
should be 31.25 ohms. The output loading impedance on
each output should be 75 ohms. The interconnect RF line
between the switch’s inputs should be an RF trace with a
characteristic impedance of 62.5 ohms. This will allow the
switch to remain matched in all possible switch states.
The HMC596LP4(E) does not provide output to output (OP1
to OP2) isolation. For this reason, it is recommended that
external ampli ers should be used at each output. The
ampli er’s reverse isolation will provide output to output isolation, if this is necessary.
Each HMC596LP4(E) requires DC blocking capacitors on ALL RF input and output ports.
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The circuit board used in the nal application should be generated with proper RF circuit design techniques.
Signal lines at the RF port should have 50 ohm impedance and the package ground leads and exposed paddle
should be connected directly to the ground plane similar to that shown above. A generous number of ground vias
should be used to interconnect top/bottom ground planes. The evaluation circuit board shown above is available
from Hittite Microwave Corporation upon request.
List of Materials for Evaluation PCB 104130
ItemDescription
J2 - J9PCB Mount SMA RF Connector
J1DC Connect or
C1 - C8330 pF Capacitor, 0402 Pkg.
C91,000 pF Capacitor, 0603 Pkg.
U1
[2]
PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
HMC596LP4 / HMC596LP4E
4x2 Switch Matrix
104113 Eval Board
[1]
Multi Pin DC Interface (J1)
PinLine
1Vdd
2Tone 1
3GND
4Tone 2
5GND
6HV1
7N/C
8N/C
9HV2
SWITCHES - SMT
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