Table 3.
Test Board Components Shown in Figure 28.
Note: Required V
CC
decoupling capacitors are not shown on the
schematic. Detailed schematic and board layout are available in
Application Note 1081.
Component Label
R1
R2, R4, R5
X3
R6
R7, R8, R9, R10
C1
C2
C3, C4, C10, C11, C12, C13
C5
C6
C7
C8
C9
L1
L2, L3
T1
Value (Size)
270 (0805)
51.1 (0805)
R = 300 (0805) for 1.89 GHz,
L = 3.3 nH for 2.45 GHz
20 (0805)
1100 (0805)
see Table 4
see Table 4
1 nF (0805 or 0504)
3.3 pF (0504 or 0603)
2.7 pF (0805)
22 pF (0805) for 1.89 GHz,
3.3 pF for 2.45 GHz
12 pF (0805 or 0504)
2.2 nF (0805)
see Table 4
3.3 nH (0805)
1:4 Balun T4-1-X65
Functional Description
A typical DECT application of the
HPMX-5001 in a dual-conversion
superheterodyne radio trans-
ceiver is shown in Figure 3. The
HPMX-5001 is designed to
provide four different modes of
operation:
• Transmit, where the VCO,
doubler, upconverting mixer,
associated buffers, and
prescaler are enabled
• Receive, where the VCO,
doubler, downconverting
mixer, associated buffers, and
prescaler are enabled
• Synthesizer, where only the
VCO and prescaler are active
• Standby, where all circuits are
disabled
These four modes are controlled
via a three wire interface,
TXCTRL, RXCTRL, and LOCTRL.
Figure 1 shows the programming
logic states for all four modes.
The detailed description of the
three active modes is given
below.
Table 4.
Component changes for dfferent IF frequencies.
IF Frequency
110 MHz
200 MHz
250 MHz
300 MHz
350 MHz
C1, pF
6.8
1.0
1.2
1.2
2.7
C2, pF
8.2
3.9
3.9
3.9
2.7
L1, nH
120
100
56
39
27
VSWR
1.3:1
1.3:1
1.3:1
1.3:1
1.3:1
7-101
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
