MAX2660/MAX2661/MAX2663/MAX2671
Evaluation Kits
Connections and Setup
1) Verify the DC power supply is set to less than +5.5V
before attaching the supply to the EV kit. A good
starting voltage is +3.0V.
Table 2. Typical Conversion Gain
PART
CONVERSION GAIN (dB) AT 900MHz
MAX2660
MAX2661
MAX2663
MAX2671
+7.0
+10.7
+3.4
2) Verify the SHDN jumper is in the “V ” position.
CC
3) Connect a signal generator to the IFIꢀ connector
using an SMA cable. As with any precision RF con-
nector, be careful while threading the connector. For
optimal performance, consult the connector manu-
facturer’s specifications for torque recommendation.
Set the generator’s output to 70MHz at -30dBm
power level.
+11.2
Detailed Description
Figure 1 is the schematic for the EV kit as shipped. The
output matching components, L1, L2, C5, and C6, are
optimized for an output frequency of 900MHz.
Capacitors C1 and C2 are DC blocking capacitors for
the IFIꢀ and LO input ports. To reduce the possibility of
noise pickup, resistor R1 and capacitor C8 form a low-
pass filter at the SHDN pin.
4) Connect a second signal generator to the LO input
connector using an SMA cable. Set the generator’s
output to 970MHz at -5dBm power level (use
-10dBm for the MAX2671 EV Kit).
5) Connect the RF output of the EV kit to the spectrum
analyzer using an SMA cable. Take care to use qual-
ity connector adapters for the spectrum analyzer’s
input. Avoid using BꢀC-type connectors due to their
high VSWR while operating in the gigahertz range.
Capacitors C3, C4, C7, C9, and C10 form the V
decoupling network. ꢀote the location of each compo-
nent. Capacitor C10, a 10µF tantalum type, is located
CC
near the V
input test point. This serves as the central
CC
node for distribution of V
to the mixer’s supply pin
CC
6) To assist in troubleshooting, verify the correct volt-
ages on the NC board with a multimeter. Use Table 1
to verify correct node voltage during proper opera-
tion.
and the output pull-up inductor L2. Both of these sup-
ply points need separate bypass capacitors as well as
separate traces on the NC board. This is prudent prac-
tice to curtail crosstalk in high-frequency systems.
Modifying the EV Kit
Table 1. Nominal DC Voltages
The EV kit is easily configured for use with any of the
MAX2660/MAX2661/MAX2663/MAX2671 devices. Each
of these devices offers different performance levels for
system optimization.
PIN NUMBER
PIN NAME NOMINAL DC VOLTAGE (V)
1
2
3
4
5
6
LO
GꢀD
(V
0
- 0.4) to (V
- 1.0)
CC
CC
IFIꢀ
+1.37
Changing to Different Devices
To configure the EV kit for a different device, use
appropriate surface-mount rework equipment to
remove the existing IC from the NCB. Take care to
ensure that the package temperature does not exceed
the limits listed in the Absolute Maximum Ratings sec-
tion of the MAX2660/MAX2661/MAX2663/MAX2671/
MAX2673 data sheet. Install the new device using
appropriate surface-mount equipment and techniques.
See Table 3 for the correct component values for the
desired operating frequency and device type.
RF OUT
V
CC
V
CC
+2.7 to +5.5
for normal operation
V
CC
SHDN
Analysis
1) Set the spectrum analyzer’s center frequency to
900MHz, with a span of 30MHz.
2) Set the marker position to the peak level.
3) Read the output power of the center frequency. This
should be -28dBm to -21dBm, depending on which
device is used. The output frequency is equal to the
algebraic difference of the LO and IF frequencies.
The power is equal to the IFIꢀ input power plus the
conversion gain of the upconverter mixer. See Table
2 for the typical conversion gain of each device.
Operation at Other Frequencies
Changing the EV kit to operate at frequencies other
than listed in Table 3 involves matching each device’s
output impedance to 50Ω at the frequency of interest.
2
_______________________________________________________________________________________
5秒后页面跳转
MAX6675资料手册参数详解、引脚配置说明
LM258引脚图及功能介绍、主要参数分析
CD4052资料手册参数详解、引脚配置说明
一文带你了解TPS5430资料手册分析：参数介绍、引脚配置说明
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
