MAX2681EVKIT Maxim Integrated Products, MAX2681EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX2681EVKIT
• Description: RF Modules & Development Tools MAX2681 EVAL KIT MAX2681 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX2681EVKIT

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

MAX2680/MAX2681/MAX2682 Evaluation Kits
The MAX2680/MAX2681/MAX2682 EV kits are fully
assembled and factory tested. Follow the instructions in
the Connections and Setup section for proper device
evaluation.
This section lists the recommended test equipment to
verify the operation of the MAX2680/MAX2681/
MAX2682. It is intended as a guide only, and some
substitutions are possible.
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1) Verify the DC power supply is set to less than +5.5V
2) Verify the jumper JU1 is in the “on” position, pin 1
3) Use a 50Ω SMA cable to connect a signal genera-
4) Use another 50Ω SMA cable to connect a second
2
DESIGNATION
_______________________________________________________________________________________
DC power supply capable of supplying a minimum
of 50mA at +2.7V to +5.5V
HP8561E spectrum analyzer or equivalent high-
sensitivity spectrum analyzer
Digital multimeter (DMM) to monitor DC supply volt-
age and supply current (if desired)
Two HP8648C RF signal generators or equivalent
(50Ω) sine-wave sources for the RF and LO inputs
Three 50Ω SMA cables (RG-58A/U or equivalent)
and is off before connecting the supply to the EV
kit. A good starting point is +3.0V. Connect the
power supply between V
power supply on.
shorted to pin 2 (SHDN = V
tor to the SMA RF connector of the EV kit. Set the
signal generator’s output frequency to 900MHz and
output power level to -25dBm.
signal generator to the SMA LO connector of the EV
kit. Set the second signal generator’s output fre-
U1
Z1
Z2
Z3
QTY
1
1
0
1
Additional Components
270pF ceramic capacitor (0603)
18nH inductor
Toko LL1608-FHI8NJ
Open
MAX2681EUT-T (6-pin SOT23)
Test Equipment Required
Connections and Setup
CC
MAX2681 EV Kit
DESCRIPTION
CC
and GND, and turn the
).
Quick Start
5) Use a third 50Ω SMA cable to connect the IF con-
1) Set the spectrum analyzer’s center frequency to
2) Set the spectrum analyzer’s marker to read the
This section describes the circuitry surrounding the
MAX2680/MAX2681/MAX2682 EV kits. For more
detailed information covering device operation, please
consult the MAX2680/MAX2681/MAX2682 data sheet.
Figure 1 is the schematic for the MAX2680/MAX2681/
MAX2682 EV kits. The RF input matching components
Z1, Z2, and Z3 are optimized for each device and for
an RF frequency of 900MHz. A DC-blocking capacitor
is required on the RF port. The IF output matching com-
ponents, L1 and C2, are optimized for an IF frequency
of 70MHz and are independent of the device chosen.
Consult Tables 2 and 4 in the MAX2680/MAX2681/
MAX2682 data sheet for components appropriate for
each device at other RF and IF frequencies. Capacitor
DESIGNATION
quency to 970MHz and output power level to
-5dBm.
nector of the EV kit to the spectrum analyzer. Take
care to use quality connector adapters for the
spectrum analyzer’s input. Avoid the use of BNC-
type connectors due to their high VSWR while oper-
ating in the GHz range.
70MHz, with a frequency span of 1MHz.
peak power level of the center frequency. For the
MAX2680 the IF power level is nominally -13.4dBm.
The IF output power is equal to the RF input power
plus the conversion gain of the downconverter
mixer. The MAX2680 has a typical conversion gain
of 11.6dB. The MAX2681 has a typical conversion
gain of 14.2dB. The MAX2682 has a typical conver-
sion gain of 14.7dB.
U1
Z1
Z2
Z3
QTY
1
1
1
1
Additional Components
1.5pF ceramic capacitor (0603)
270pF ceramic capacitor (0603)
10nH inductor
Toko LL1608-FH10NJ
MAX2682EUT-T (6-pin SOT23)
Detailed Description
MAX2682 EV Kit
DESCRIPTION
Analysis