PCF5079T Просмотр технического описания (PDF) - Philips Electronics

Номер в каталоге

Компоненты Описание

производитель

PCF5079T

Dual-band power amplifier controller for GSM, PCN and DCS

Philips Electronics 

Philips Semiconductors

Dual-band power amplifier controller for

GSM, PCN and DCS

Product specification

PCF5079

7.8 Configurations

Table 1 Operating conditions

POWER-UP INPUT (PU)

0

1

OPERATING MODE

disabled; reset

enabled

Table 2 Band selection configuration

BAND SELECT

INPUT (BS)(1)

0

1

BAND

GSM

DCS

DRIVER

SWITCHES

OP4G → active;

SFG → working;

OP4D → power-down SFD → open

OP4D → active;

SFD → working;

OP4G → power-down SFG → open

Note

1. BS input has to be set before the PU transition logic 0 to logic 1.

CONTROL VOLTAGE

VVCG → working;

VVCD → VSS

VVCD → working;

VVCG → VSS

7.9 Summary of current and voltage definitions

Refer to Figs 1, 4 and 12.

SYMBOL

VVS1

VVS2

VVDAC

VVCG

VVCD

Vhome

Vprebias

Ibias1

Ibias2

RFin

RFout

DESCRIPTION

sensor signal of incident RF power or power sensor 1 signal

sensor signal of reflected RF wave or power sensor 2 signal

DAC voltage

control voltage of PA

control voltage of PA

home position voltage

prebias reference voltage; used at the start-up

bias current for detector diode D1

bias current for detector diode D2

input signal to the power amplifier

output signal from the power amplifier

7.10 Timing

Refer to Figs 4 and 5.

SYMBOL

td1

td2

td3

td4

td5

DEFINITION

delay time; VDD application to PU input transition logic 0 to 1

delay time; PU input transition logic 0 to 1 to VVDAC ramp-up

VVDAC ramp-up detection time

delay time; ramp-up detected to VVCD, VVCG = Vhome

delay time; PU input transition logic 1 to 0 to end of burst

MIN.

5.0

20

−

−

−

MAX.

−

−

3.0

2.6

1.0

UNIT

µs

µs

µs

µs

µs

2001 Nov 21

10

Share Link: