UAA3535HL データシートの表示（PDF） - Philips Electronics

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UAA3535HL

Fully integrated DECT transceiver

Philips Electronics 

Philips Semiconductors

Low power GSM/DCS/PCS multi-band transceiver

Objective specification

UAA3535HL

IF SYNTHESIZER AND VCO CONTROL

The IF synthesizer is only necessary in transmit mode.

The TX IF VCO and synthesizer section can be

powered-up with the control bit TXIFON; see Table 2.

If TXIFON is not used, the IF VCO and synthesizer section

will be enabled with the signal TXON.

Table 2 IF synthesizer and VCO power control

BIT TXIFON

0

1

IF SYNTHESIZER AND

VCO MODE

off

on

LNA POWER CONTROL

When the receiver is on, it is possible to switch-off the low

noise amplifier separately. Separate control of the low

noise amplifier is accomplished by the control bit LNA; see

Table 3.

Table 3 LNA power control

BIT LNA

0

1

LNA MODE

off

on

BAND SELECTION CONTROL

The receiver includes two RF front-end and RF LO

sections; one for GSM where the RF LO is divided-by-2

and fed to the 925 to 960 MHz front-end, and the other

one for DCS and/or PCS where the RF LO is not divided

and fed to the 1805 to 1990 MHz front-end. The selection

of these 2 modes is accomplished by the control bit BND;

see Table 4.

SIDEBAND SELECTION CONTROL

The receiver includes an image rejection front-end which

allows the use of a RF LO 100 kHz below the RF input

frequency (infradyne) or 100 kHz above the RF input

frequency (supradyne). Between these two states the

proper image should be selected for rejection.

The selection of these 2 modes is accomplished by the

control bit SBD; see Table 5.

Table 5 Sideband selection control

BIT SBD

0

1

SIDEBAND MODE

supradyne

infradyne

TX CHARGE PUMP CURRENT CONTROL

The transmit modulation loop includes a transmit charge

pump where sink and source currents are determined by

an external resistor. When determined, this nominal

current can be divided-by-1 or 2 to cope with different

transmit VCO gains. The selection of these 2 modes is

accomplished by the control bit TXI; see Table 6.

Table 6 TX charge pump current control

BIT TXI

0

1

TX CHARGE PUMP CURRENT MODE

nominal current

nominal current divided-by-2

REFERENCE DIVIDER CONTROL

The reference divider can be programmed to divide the

external reference frequency by 65 or 130. The selection

of these 2 modes is accomplished by the control bit

REFDIV; see Table 7.

Table 4 Band selection control

BIT BND

0

1

BAND MODE

GSM

DCS and/or PCS

Table 7 Reference divider control

BIT REFDIV

REFERENCE DIVIDER MODE

0

divide-by-65

1

divide-by-130

2000 Feb 17

7

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