UAA3545HL データシートの表示（PDF） - Philips Electronics

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UAA3545HL

Fully integrated DECT transceiver

Philips Electronics 

Philips Semiconductors

Fully integrated DECT transceiver

Product specification

UAA3545

FEATURES

• Economical solution for a radio in DECT cordless

telephones

• Integrated low phase noise VCO with no production

tuning required

• Fully integrated receiver with high sensitivity

• Dedicated DECT PLL synthesizer

• 3 dBm output preamplifier with an integrated switch

• 3-line serial interface bus

• Low current consumption from a 3.2 V supply

• Compatible with Philips Semiconductors baseband

chips (PCD509xx and PCD80xxx)

• Reduced number of control signals.

APPLICATIONS

• DECT cordless telephones: 1880 to 1930 MHz.

GENERAL DESCRIPTION

The UAA3545 BiCMOS device is a low power, highly

integrated circuit, for Digital Enhanced Cordless

Telecommunication (DECT) applications.

It features a fully integrated receiver, from antenna filter

output to the demodulated data output, a fully integrated

VCO, a synthesizer to implement a phase-locked loop for

DECT channel frequencies and a TX preamplifier to drive

the external transmit power amplifier (CGY20xx series or

UAA359x series of Philips integrated circuits).

The synthesizer’s main divider is driven by the prescaler

output in the range of 1880 to 1930 MHz and is

programmed via a 3-wire serial bus. The reference divider

ratio is programmable to 4, 8, 12 or 16. Outputs of the

main and reference dividers drive a phase comparator

where a charge pump produces phase error current pulses

for integration in an external loop filter (only a passive loop

filter is necessary). The charge-pump current is set to

4 mA for fast switching.

The VCO is powered from an internally regulated voltage

source and includes integrated variable capacitance

diodes and integrated coils. Its tuning range is guaranteed.

The VCO and the synthesizer are switched-on one slot

before the active slot to lock the VCO to the required

channel frequency. Immediately before the active slot, the

synthesizer is switched-off to allow open loop modulation

of the VCO during transmission. When opening the loop,

frequency pulling (due to switching-off the synthesizer)

can be maintained within the DECT specification.

The device is designed to operate from a 3.2 V nominal

supply. Separate power and ground pins are provided for

the different sections of the circuit. Ground leads should be

short-circuited externally to prevent large currents flowing

across the die and causing damage. All VCC supplies

(VCC(REG), VCC(SYN), VCC(RX) and VCC(TX)) must be at the

same potential (VCC).

ORDERING INFORMATION

TYPE

NUMBER

UAA3545HL

NAME

LQFP32

PACKAGE

DESCRIPTION

plastic low profile quad flat package; 32 leads; body 5 × 5 × 1.4 mm

VERSION

SOT401-1

2001 Sep 06

2

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