UAA1570HL View Datasheet(PDF) - Philips Electronics

Part Name

Description

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UAA1570HL

Global Positioning System (GPS) front-end receiver circuit

Philips Electronics 

Philips Semiconductors

Global Positioning System (GPS) front-end

receiver circuit

Product specification

UAA1570HL

1 FEATURES

• Complete single-chip programmable

double-superheterodyne C/A-code GPS receiver

• Programmable high IF frequencies supporting

wideband/P-code GPS and Global Navigation Satellite

System (GLONASS) applications

• Supports frequency plans with a 2nd IF of

4 × f0(1.023 MHz) = 4.092 MHz

• 48-pin LQFP package

• −40 to +85 °C operating temperature range

• 2.7 V minimum supply voltage

• Low DC power consumption [57 mA typical with both

Low-Noise Amplifiers (LNAs) active]

• Power-down mode (<900 µA)

• Typical receiver noise figure at 1.57542 GHz: 4.5 dB

• Typical phase noise −72 dBc/Hz at 10 kHz offset

• Simple microstrip LNA1/2 and first mixer matching

• Single pin VCO with external varactor and resonator

• Digital Phase Locked Loop (DPLL) synthesizer with

programmable VCO, 2nd Local Oscillator (LO) and

reference dividers

• 3-bit synthesizer and power-down control input

• Reference and independent sample clock input with

internal squaring

• 1-bit amplitude quantized and time sampled TTL/CMOS

compatible output driver

• High active gain supporting SAW filter applications

• Configurable for external first LNA applications.

2 GENERAL DESCRIPTION

The UAA1570HL is a complete single-chip

double-superheterodyne receiver front-end intended for

GPS and GLONASS navigation systems. The IC includes

a programmable on-chip DPLL synthesizer, VCO with

external varactor and resonator, a 1-bit amplitude

quantizer and a time sampled TTL/CMOS compatible

SIGN output bit driver. It can be used with either an active

or passive antenna system by disabling or enabling the

on-chip LNAs and is ideally suited for low power GPS

receiver applications because of its 3 V supply and the

power management features through control pins.

Programmable prescaler controls provide the flexibility of

using different frequency schemes.

The UAA1570HL is optimized to provide SIGN bit data to

the companion Philips part, the SAA1575HL baseband

digital signal processor. The SAA1575HL can provide the

sample clock input to the UAA1570HL by dividing a

TTL/CMOS level reference clock signal down to a

programmable sampling clock output frequency. Both ICs

can also be used independently.

The UAA1570HL is supplied in a low profile, 48-pin LQFP

package for excellent Radio Frequency (RF) performance

and small size.

3 ORDERING INFORMATION

TYPE

NUMBER

UAA1570HL

NAME

LQFP48

PACKAGE

DESCRIPTION

plastic low profile quad flat package; 48 leads; body 7 × 7 × 1.4 mm

VERSION

SOT313-2

1999 May 10

3

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