MAX2365ETM+T【PDF 17/29 页】IC TRANSMITTER QUAD 48TQFN-EP

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Sheet目录55

13页 14页 15页 16页 [17页]18页 19页 20页 21页

Complete Dual-Band

Quadrature Transmitters

______________________________________________________________________________________ 17

Table 4. Current Control Register (I

CTRL)

Table 5. Current Scale Factors Set

By I_MULT Bits

BIT NAME

POWER-

UP STATE

BIT

LOCATION

(0 = LSB)

FUNCTION

RESERVED

15, 14

Must be set to 00 for normal operation.

PSS

Prescaler speed select. 0 selects the lower frequency band RFPLL

prescaler. 1 selects the higher frequency band prescaler.

RESERVED

Must be set to 0 for normal operation.

MPL

Sets the maximum output power level. 0 selects +6.5dBm, 1 selects

+10dBm output power modes.

TEMP_COMP

10, 9

Sets current scale factor to compensate temperature variations. Set to 10

for best linearity over temperature.

RESERVED

Must be set to 0 for normal operation.

MOD_BYPASS

1 routes differential signal at pins 30 and 31 directly to the IF VGA and

bypasses the IF modulator. This mode is used with external modulator.

THR TTLE BA K

011

6, 5, 4

Throttle back rate (Table 6)

I MULT

1000

3 2 1 0

Sets current scale factor for PA drivers Table 5

BIT NAME

BITS

CURRENT

SCALE

0000

0.50

0001

0.56

0010

0.62

0011

0.69

0100

0.75

0101

0.81

0110

0.88

0111

0.94

1000 (default)

1.00

1001

1.13

1010

1.25

1011

1.38

1100

1.50

1101

1.63

1110

1.75

I_MULT

1111

1.88

BIT NAME

BITS

RATE

UNIT

000

1.3

001

1.2

010

1.1

011 (default)

1.0

100

0.9

101

0.8

110

0.7

TH ROTTLE _BAC K

111

0.6

dBmA/dB

Table 6. Throttle-Back Rate Set

By THROTTLE_BACK Bits

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