MAX2310(2003) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX2310 Datasheet PDF : 22 Pages
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CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
10kΩ
0.033µF
47pF
3.3nF
0.01µF
10kΩ
10kΩ
10kΩ
10kΩ
18pF
5pF
68nH
18pF
12pF
1.5pF
18nH
12pF
VCC
47pF
I
10kΩ
BYP
CPOUT
GND
TANKL+
BYP
BYP
FM-
FM+
CDMA+
MAX2310
TANKL-
CDMA-
TANKH+
VGC
TANKH-
MODE
VCC
GND
REF
SHDN
IOUT+
VCC
DATA
EN
CLK
QOUT+
IOUT-
QOUT-
LOCK
0.01µF
VCC
0.1µF
0.01µF
680Ω
47pF
3-WIRE
10kΩ
47kΩ
FM
CDMA
DAC
VCC
Q
Figure 1. MAX2310 Typical Operating Circuit
_______________Detailed Description
MAX2310
The MAX2310 is intended for dual-band (PCS and cel-
lular) and dual-mode code division multiple access
(CDMA) and FM applications (Figure 1). The device
includes an IF variable-gain amplifier, quadrature
demodulator, dual VCOs, and dual-frequency synthe-
sizers (Figure 7). Dual VCOs are provided for applica-
tions using different IF frequencies for each mode or
band of operation. The analog FM output signal can be
VCC
configured for conversion to the I channel, or it may be
converted in quadrature to both the I and Q channels.
The MAX2310’s operation modes are described in
Table 1. These modes are set by programming the con-
trol register and setting logic levels on control pins. If
MODE is left floating, the internal register controls the
operation. If driven high or low, mode will override cer-
tain register bits, as shown in Table 1.
8 _______________________________________________________________________________________
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