MAX2314 MAXIM [Maxim Integrated Products], MAX2314 Datasheet - Page 13

• Manufacturer Part Number: MAX2314
• Description: CDMA IF VGAs and I/Q Demodulators with VCO and Synthesizer
• Manufacturer: MAXIM [Maxim Integrated Products]

The MAX2314 supports CDMA cellular-band, dual-
mode operation. As with the MAX2310, the FM mode
can be configured for conversion to the I port or quad-
rature conversion to both the I and Q ports (Figure 3).
The MAX2314’s operational modes are described in
Table 3. These modes are set by programming the
control register and setting logic levels on control pins.
Figure 3. MAX2314 Typical Operating Circuit
0.033µF
10kΩ
10kΩ
______________________________________________________________________________________
10kΩ
V
CC
CDMA IF VGAs and I/Q Demodulators
3300pF
18pF
18pF
5pF
47pF
0.01µF
47pF
68nH
1000pF
MAX2314
10kΩ
BYP
CP_OUT
GND
TANKL+
TANKL-
BYP
V
GND
REF
SHDN
I_OUT+
I_OUT-
with VCO and Synthesizer
CC
MAX2314
Q_OUT+
Q_OUT-
The MAX2310 family provides a Variable-Gain Amplifier
(VGA) with exceptional gain range. The MAX2310/
MAX2314 support multimode applications with dual dif-
ferential inputs, selectable with the IN_SEL (IS) control
bit. On the MAX2310 this function can be controlled
with the MODE pin, which overrides the IS control bit.
The VGA’s gain is controlled over a 110dB range with
CDMA+
CDMA-
__________Applications Information
LOCK
DATA
FM+
VGC
BYP
BYP
FM-
CLK
V
Variable-Gain Amplifier and Demodulator
EN
CC
V
CC
0.01µF
0.01µF
0.01µF
47kΩ
680Ω
10kΩ
3-WIRE
47pF
V
V
CC
CC
V
CDMA
CC
DAC
Q
FM
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