RF25A-12 데이터 시트보기 (PDF) - Conexant Systems

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RF25A-12

RF25A for CDMA, and AMPS Applications

Conexant Systems 

Rx ASIC

RF25A

Table 5. RF25A Rx ASIC Electrical Specifications (2 of 2)

TA = 25° C, VCC = 3.0 V, PLO = -10 dBm

Parameter

Symbol

Test Condition

Min

Rx VGA - I/Q Demodulator (continued)

Gain slope

Gain slope linearity (over any 6 dB segment)

-3

IF amplifier IIP3:

@ Maximum gain (CDMA mode)

@ Maximum gain (AMPS mode)

Input 1 dB compression @ minimum gain

IF amplifier noise figure:

@ Maximum CDMA gain

@ Minimum CDMA gain

@ Maximum AMPS gain

Output level:

CDMA

AMPS

Maximum output level

1.4

Gain variation over frequency:

CDMA (1-630 kHz)

AMPS (0.1-12.2 kHz)

I+, I-, and Q+, Q- DC offset

I/Q gain mismatch

I/Q phase mismatch

I to Q DC offset

Total supply current (includes I/Q mixers, LO buffers, and

dividers)

Oscillator

Frequency range

100

Phase noise (fc = 200 MHz, unloaded Q = 20) @ 100 kHz

offset

Second harmonic distortion (application dependent)

Output level to PLL (differential)

Output impedance to PLL (differential)

Reverse isolation

-30

Total supply current

Typical Max

45

+3

-50

-58

-10

6

50

8

2.75

5.5

0.1

0.3

0.1

0.3

6

0.2

0.3

2

4

30

12

600

-117

-30

-26

300

300

-40

8

Units

dB/V

dB

dBm

dBm

dB

dB

dB

mVrms

mVrms

Vp-p

dB

dB

mVrms

dB

deg

mV

mA

MHz

dBc/Hz

dBc

mVp-p

Ω

dB

mA

101110A

Conexant – Preliminary

9

August 4, 2000

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