Datasheet
Evaluates: MAX2830
MAX2830 Evaluation Kit
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5) Enable the output of the baseband signal sources.
The sideband, LO leakage, and the carrier appear
at 2436MHz, 2437MHz, and 2438MHz, respective-
ly. Adjust the TX gain sliding bar to observe the
power level in the power meter reading.
Layout Considerations
The MAX2830 EV kit can serve as a guide for board
layout. Keep PCB trace lengths as short as possible to
minimize parasitic inductance. Also, keep decoupling
capacitors as close to the IC as possible with a direct
connection to the ground plane.
Power-Supply Layout
To minimize coupling between different sections of the
IC, use a star power-supply routing configuration with a
large decoupling capacitor at a central V
CC
node. The
V
CC
traces branch out from this node, each going to a
separate V
CC
node in the circuit. Place a bypass
capacitor as close to each supply pin as possible. This
arrangement provides local decoupling at each V
CC
pin. Use at least one via per bypass capacitor for a
low-inductance ground connection. Do not share the
capacitor ground vias with any other branch.
Table 1. Jumper Functions
JUMPER SETTING FUNCTION
Pins 2-3 Enable receive mode
RXTX
Pins 1-2 Enable transmit mode
Pins 1-2 Connect the Rx input or Tx output to ANT2
ANTSEL
Pins 2-3 Connect the Rx input or Tx output to ANT1
Pins 1-2 Enables the buffers
TXBBBUF/RXBBBUF
Pins 2-3 Disables the buffers
VREG Pins 1-2 Short the jumper to provide voltage to the MAX2831 from the linear regulator (U10)
Pins 2-3 Supply the V
CCVCO
from VREG
VCCVCO
Pins 1-2 Supply the V
CCVCO
from the linear regulator (U10)
Note: A square symbol
(I)
on top-layer silkscreen indicates pin 1.