UAA1570HL View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

UAA1570HL

Global Positioning System (GPS) front-end receiver circuit

Philips Electronics 

Philips Semiconductors

Global Positioning System (GPS) front-end

receiver circuit

Product specification

UAA1570HL

SYMBOL

COMP

P41GND

P42GND

VCCA(LNA1)

LNA1GND1

LNA1IN

BIASGND1

LNA1GND2

LNA1OUT

PIN VOLTAGE

PIN TYPICAL VALUES (V)

VCC = 2.7 V VCC = 5 V

40 depends on

VCO

application

depends on

VCO

application

41 0

42 0

43 2.7

44 0

45 0.815

46 0

47 0

48 1.48

0

0

5

0

0.807

0

0

3.629

DESCRIPTION

Charge pump phase frequency detector output: the PLL loop

filter is connected in shunt and close proximity to this pin. The

PLL loop filter tuning control voltage should be routed to the

external VCO varactor circuit using minimal trace lengths in

complete isolation from all potential coupling sources.

this pin provides additional RF/IF shielding and has to be

connected to ground

this pin provides additional RF/IF shielding and has to be

connected to ground

LNA1 power supply: DC operation range 2.7 to 5 V; use close

proximity RF decoupling to pins 44, 46 and 47.

LNA1 ground 1: minimize RF ground inductance

LNA1 input: use external RF AC coupling

LNA1 bias circuit ground: minimize RF ground inductance

LNA1 ground 2: minimize RF ground inductance

LNA1 output: use external RF AC coupling. The DC voltage is

approximately 1.3 V below the VCCA(LNA1) supply on pin 43.

1999 May 10

9

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