ACPM-7833-BLK 데이터 시트보기 (PDF) - Avago Technologies

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ACPM-7833-BLK

CDMA1900 (PCS) Power Amplifier Module

Avago Technologies 

Combinations of these channels will increase the peak

to average power ratio for higher data rates. The

complementary cumulative distribution function

(CCDF) measurement characterizes the peak to average

power statistics of CDMA2000 reverse link. For

reference, the system specifications of peak to average

power ratio of IS-95 and CDMA2000 IX RTT are 3.9 dB

and 5.4 dB at 1% CCDF respectively.

Higher peak to average power ratio requires a higher

margin, both in higher power gain and in improved

thermal stability for PA linearity to meet the minimum

system specifications.

The test results below for the ACPM-7833 show the

compliance to the system linearity specifications with

4 channel configurations, representing a broad cross-

section of CDMA2000 1X RTT environments.

Test result of ACPM-7833 using CDMA2000 1X RTT signal

Test condition - PA Evaluation board with Vdd1=Vdd2=Vbias = 3.4V, Vcntl = 2.5V, Frequency = 1880 MHz.

Test result with each channel configuration.

Channel

Basic

Voice+Data

Voice+Cntl

Cntl only

IVdd(mA)

451.0

435.0

439.0

299.0

Pin(dBm)

-0.14

0.52

0.50

-2.56

1.25 MHz

ACPR(dBc)

-52.6

-46.2

-45.5

-49.1

1.25 MHz

ACPR(dBc)

-51.5

-45.7

-44.9

-48.8

-1.98 MHz

ACPR(dBc)

-60.2

-58.0

-60.1

-57.7

+1.98 MHz

ACPR(dBc)

-60

-58.3

-60

-57.5

Pout(dBm)

28

28

28

25.5

EIA/TIA-98-D indicates a 2.5 dB allowed back off in power for control channel only configuration.

Peak to average power ration (Pout = 16 dBm)

CCDF(%)

10

1

0.1

0.01

0.001

0.0001

Basic

2.11

3.74

4.68

5.15

5.36

5.48

Voice + Data

3.37

4.83

5.68

6.20

6.53

6.63

Voice + CNTL

3.44

5.21

6.24

6.76

7.11

7.17

CNTL only

4.00

5.75

6.73

7.18

7.39

7.45

10

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