MAX2361 MAXIM [Maxim Integrated Products], MAX2361 Datasheet - Page 8

• Manufacturer Part Number: MAX2361
• Description: Evaluation Kits
• Manufacturer: MAXIM [Maxim Integrated Products]

*Set R9 and R18 for different I/Q input-source level (baseband
waveform taken from the back panel of Agilent’s E4433B signal
generator).
MAX2361/MAX2363W Evaluation Kits
Table 2. Baseband Termination Resistor
Values
The IFLO output port provides an output signal that is
either the IF VCO frequency or the VCO frequency
divided by 2, depending on the setting of the BUF_DIV
control bit. It can be enabled by setting the BUF_EN bit
to 1 in the OPCTRL register.
The tank bypass port is provided to drive the high-band
tank with an external LO source. The VCO_BYPASS bit
should be set to 1 to enable this port. Replace C25 with
0.01µF AC-coupling capacitor; replace R36 and R70 with
0Ω resistors; and remove R38, C12, C24, L10, D1, and D2.
REF is the reference frequency input to the RF and IF
PLL. The REF port is AC-coupled. Make sure the refer-
ence signal has low phase noise.
LOH is the high-band RF LO input port. The EV kit is
shipped with this port disconnected. To use this port
with an external signal source, disconnect the PCS
VCO by removing C39 and placing it at location C66.
LOL is the low-band RF LO input port. The EV kit is
shipped with this port disconnected. To use this port
with an external signal source, disconnect the cellular
VCO by removing C40 and placing it at location C65.
RFH1 is the PCS lower half-band PA driver output.
Refer to Table 9 in the MAX2361/MAX2363/MAX2365
data sheet for the mode description.
RFL is the cellular band PA driver output. This port is
active in cellular and FM modes. Refer to Table 9 in the
MAX2361/MAX2363/MAX2365 data sheet for the mode
description.
8
MODULATION
3GPP WCDMA
_______________________________________________________________________________________
CDMAONE
Sinusoidal
TDMA
VOLTAGE AT I_/Q_
I/Q DIFFERENTIAL
INPUTS (mVp-p)
600
415
600
600
R9, R18 (Ω)
TANK BYP
75
39
24
22
RFH1
IFLO
LOH
REF
LOL
RFL
*
RFH0 is the PCS upper half-band PA driver output.
Refer to Table 9 in the MAX2361/MAX2363/MAX2365
data sheet for the mode description.
For cascade evaluation, an on-board filter is connected
between IFOUTH and IFINH. Select these ports by pro-
gramming IF_SEL to 1. IFINH and IFOUTH are not con-
nected to SMA connectors on the EV kit
For cascade evaluation, an on-board filter is connected
between IFOUTL and IFINL. Select these ports by pro-
gramming IF_SEL to 0. For individual IF modulator and
upconverter evaluation, remove R44, R49, R55, R58,
and install R25, R33, R34, and R39 with 0Ω resistors.
This connects the IFINL_ and IFOUTL_ pins to the IFINL
and IFOUTL SMA connectors. The matching networks
are tuned to 130MHz.
VBAT supplies V
an unregulated battery voltage. The PA drivers are open
collector. Jumpers are provided to enable current mea-
surement to each functional block of the IC (Table 3).
VREG is connected to the output of the U2 regulator on
the EV Kit. Do not connect an external supply voltage to
VREG header.
When resistor R73 is stuffed (typically 10kΩ), a bias volt-
age may be applied to the RBIAS header to adjust the
PA driver bias current. Internal to the IC, pin 12 is set to
600mV. Output linearity or efficiency may be improved
by adjusting PA driver current.
The MAX2361/MAX2363W EV kits can serve as guides
for your board layout. Keep PC board trace lengths as
Table 3. Jumpers
JUMPER NO.
JU10
JU1
JU2
JU3
JU4
JU6
JU7
JU8
JU9
CC
to the PA driver circuitry. This may be
Layout Considerations
V
External cellular VCO
External PCS VCO
VGC jumper
PA predrivers V
RF mixer V
IF modulator V
Digital V
RF charge pump V
ASSOCIATED FUNCTIONAL BLOCK
CC
for VCC DRIVER
CC
CC
IFINH and IFOUTH
CC
IFINL and IFOUTL
CC
CC
VBAT/VREG
RBIAS
RFH0