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| 型號： | MAX2402EVKIT-SO |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Evaluation Kit |
| 中文描述： | 評估板 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大?。?/td> | 2403K |
| 代理商： | MAX2402EVKIT-SO |
E
MAX2402 Evaluation Kit
2
_______________________________________________________________________________________
_________________________Quick Start
The MAX2402 EV kit is fully assembled and factory test-
ed.
Do not turn on the power until all connections
are made.
Test Equipment Required
Signal source, sine-wave generator with range up to
1000MHz (example: HP8656B)
Signal source, function generator with range up to
10MHz
Spectrum analyzer with range up to 4GHz (example:
TEK2755AP)
Power supply capable of 5V, 300mA output with
current limit
Connections and Signal Conditions
1) Verify that all shunts are across jumpers W1–W4.
2) The LO port can be driven single-ended or differen-
tially. For single-ended drive, connect an SMA cable
from the 1000MHz signal source to the LO+ SMA
input on the EV kit. For differential drive, install a
220pF ceramic capacitor (not provided) at site C11.
Using SMA cables, connect the signal source to the
LO+ and LO- inputs through a balun with sufficient
bandwidth.
The EV kit was designed for single-ended or differ-
ential LO drive. In your final layout, capacitors C10
and C11 are not required. For single-ended LO drive
applications, ground the unused LO port as close to
the package as possible. For differential drive appli-
cations, connect LO lines directly to LO port pins.
Coupling capacitors are not required, as the LO
ports are internally AC coupled.
3) Connect an SMA cable from the spectrum analyzer
to the OUT SMA on the EV kit.
4) Connect the power supply to the appropriate V
CC
and GND terminals on the EV kit.
5) Place a shorting termination on the MOD SMA con-
nector to put the mixer in a fully on position.
6) Set LO power to 0dBm and frequency to 900MHz on
the signal source. Do not apply a signal to the DUT
yet, if you have control of this function.
7) Set the spectrum analyzer’s dynamic range for a top
limit of 30dBm, and set the frequency range for an
appropriate setting to view the output.
8) Set the power supply to 5.0V and set the current limit
to 300mA. Apply power.
Analysis
1) R1 is a 121
surface-mount resistor on the EV kit
which is parallel with the 50
termination of the
spectrum analyzer. This sets the load of the power
amplifier at 35
, which is a close match to the power
amplifier’s output impedance. As a result, the spec-
trum analyzer will display an output power level
which is 1.5dB below the actual transmitted power.
As long as this resistor is on the EV kit, 1.5dB must
be added to any displayed power levels to get accu-
rate information.
R1 can be removed, if desired, with about a 0.7dB
reduction in transmitted power due to the load mis-
match. The output power (with 1.5dB added to the
displayed power) should be at least 20dBm. (Note:
Before signal is applied to the LO port there may be
a parasitic oscillation on the EV board. This is
caused by parasitic feedback from the power-
amplifier output to the LO port and cable. When sig-
nal is applied to the LO port, this oscillation will
abate.)
2) The output power can be observed for the 800MHz
to 1000MHz LO input range and over the prescribed
input power levels. (Near 800MHz, it may be neces-
sary to adjust BADJ to higher than 2.5V to maintain
stability.)
3) To observe the effects of the VGC voltage on output
power, connect an adjustable supply to the VGC test
point on the EV kit and remove the VGC jumper (W3).
This supply can now be adjusted and the output
power can be observed as a function of VGC volt-
age. The VGC range is 0V to V
CC
. The output power
should be at a minimum when VGC is adjusted below
0.8V. The output power should be at a maximum
when VGC is adjusted above (V
CC
- 0.5V).
4) The BADJ pin is used to control the bias level of the
final stages of the PA. The adjustment range on
BADJ is 0V to V
CC
, with 0V representing the greatest
bias current and 5V the least. More bias current will
result in more output power, less efficiency, and less
distortion. The intended configuration for this pin is a
single resistor pull-up or pull-down to V
CC
or GND,
respectively. The value of this resistor will determine
the bias voltage at the BADJ pin. See Table 1 in the
MAX2402 data sheet for a guide to resistor use at
the BADJ input.
The MAX2402 BADJ input is self biasing to about
V
CC
/2 and can be left open. At low BADJ voltage
settings and lower frequencies within the 800MHz to
1000MHz range, the power-supply current may
increase unacceptably or the circuit may oscillate.
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| MAX2403ETI | 功能描述:調(diào)節(jié)器/解調(diào)器 RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| MAX2403ETI+ | 功能描述:調(diào)節(jié)器/解調(diào)器 RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| MAX2403ETI+T | 功能描述:調(diào)節(jié)器/解調(diào)器 RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| MAX2403ETI-T | 功能描述:調(diào)節(jié)器/解調(diào)器 RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| MAX2403EVKIT | 功能描述:射頻開發(fā)工具 RoHS:否 制造商:Taiyo Yuden 產(chǎn)品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
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