MAX2673EVKIT+ Maxim Integrated Products, MAX2673EVKIT+ Datasheet - Page 2

• Manufacturer Part Number: MAX2673EVKIT+
• Description: RF Modules & Development Tools MAX2673 EVAL KIT MAX2673 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX2673EVKIT+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5) Connect the RF output of the EV kit to the spectrum
6) To assist in troubleshooting, verify the correct DC
1) Set the spectrum analyzer’s center frequency to
2) Set the marker position to the peak level.
3) Read the output power of the center frequency. This
MAX2673 Evaluation Kit
Table 1. Nominal DC Voltages
2
PIN NUMBER
analyzer using an SMA cable. Take care to use
quality connector adapters for the spectrum analyz-
er’s input. Avoid the use of BNC-type connectors
due to their high VSWR while operating in the GHz
range.
voltages on the PC board with a multimeter. Use
Table 1 to verify correct node voltage during proper
operation.
900MHz, with a span of 30MHz.
should be nominally -18dBm ±1.3dBm. The output
frequency is equal to the algebraic difference of the
LO and IF frequencies. The power is equal to the
IFIN input power, plus the conversion gain of the
upconverter mixer. The MAX2673 has a typical con-
version gain of 12dB.
_______________________________________________________________________________________
2, 6
1
3
4
5
7
8
PIN NAME
RF OUT
SHDN
IFIN+
GND
IFIN-
V
LO
CC
(V
0
V
+2.7V to +5.5V
V
+1.37V
+1.37V
CC
CC
CC
for normal operation
- 0.4V) to (V
NOMINAL DC
VOLTAGE
Analysis
CC
- 1.0V)
Figure 1 is the schematic for the EV kit as shipped. The
output matching components (L1, L2, C4, and C5) are
optimized for an output frequency of 900MHz.
Capacitor C1 is a DC-blocking capacitor for the LO
input port. To reduce the possibility of noise pickup,
resistor R2 and capacitor C9 form a lowpass filter at the
SHDN pin.
Capacitors C2, C3, C6, C7, and C8 form the V
decoupling network. Note the location of each compo-
nent. Capacitor C7, a 10µF tantalum type, is located
near the V
node for distribution of V
and the output pull-up inductor L2. Both of these sup-
ply points need separate bypass capacitors as well as
separate traces on the PCB. This is prudent practice to
curtail crosstalk in high-frequency systems.
The MAX2673 EV kit is easily used at output frequen-
cies from 400MHz to 2500MHz. To operate at frequen-
cies other than the factory configuration of 900MHz,
refer to Table 2 for the required component values.
Table 2. Output Matching Components
vs. RF Output Frequency
C2, C3, C6, C9
DESIGNATOR
REFERENCE
C4
C5
L1
L2
CC
input test point. This serves as the central
400MHz
3300pF
470pF
6.8pF
Short
39nH
Detailed Description
Modifying the EV Kit
RF OUTPUT FREQUENCY
CC
900MHz
220pF
1.5pF
27nH
18nH
47pF
to the mixer’s supply pin
1900MHz 2450MHz
100pF
5.6nH
4.7nH
1.5pF
47pF
220pF
3.9nH
6.8nH
47pF
1pF
CC