SA9025 데이터 시트보기 (PDF) - Philips Electronics

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SA9025

900 MHz transmit modulator and 2.2 GHz fractional–N synthesizer

Philips Electronics 

Philips Semiconductors

900 MHz transmit modulator and 2.2 GHz

fractional–N synthesizer

Objective specification

SA9025

Table 3.

Main and auxiliary chargepump currents

CP1

CP0

0

0

IPHA

1.5xlset

0

1

0.5xlset

1

0

1.5xlset

1

1

0.5xlset

NOTES

1. ISET = Vset/RN; bias current for charge pumps.

2. CP1 is used to disable the PHI pump.

3. Iphp_su is the total current out of PHP in speedup mode.

D word, length 24 bits

IPHP

3xIset

1xlset

3xlset

1xlset

IPHP–SU

15xlset

5xlset

15xlset

5xlset

IPHI_SU

36xlset

12xlset

0

0

Address

Power Control

M

Sleep

divider SE TM AD Mode

Test pa_current

1

1

0 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 M1 M0 SE TM AD SM1 SM2 pai5 pai4 pai3 pai2 pai1 pai0

Default:

x

xx x

x x x x 0 0 000 0

0000000

D0 word select

Fixed to 110.

Output Power Control

PC7(msb)...PC0(Isb) Provides output power attenuation for DUAL mode amplifier outputs in 0.18 dB steps, Fx = 45.9 dB.

M Divider

00 = 6, 01 = 7, 10 = 8, 11 = 9

Offset loop power down

SE Offset loop synthesizer power down, SE = 1 power on, SE = 0 power down (sleep mode).

DUAL mode select

TM = 0 DUALmode

AMPS/DAMPS mode select

AD = 1 DAMPS mode.

AD = 0 AMPs mode

TX buffers power down

SM1 TX Local oscillator buffers power down. SM1 = 1 power on, SM1 = 0 to power down.

SM2 RCLK buffer power down. SM2 = 1 power on, SM2 = 0 to power down.

Test: pa_current:pai

TX test bits for controlling the current in the power amp. Should be 0 during normal operation.

1997 Aug 01

16

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