MAX2310 查看數據表（PDF） - Maxim Integrated

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MAX2310

CDMA IF VGAs and I/Q Demodulators with VCO and Synthesizer

Maxim Integrated 

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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