STA8090GA datasheet(23/32 Pages) STMICROELECTRONICS

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DS10820 Rev 5

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STA8090GA

Electrical characteristics

4.8

AC characteristics

4.8.1

RF electrical specifications

VOL

Low level output voltage

VOB = 1.0 V

—

0.2

VOH

High level output voltage

VOB = 1.0 V

VOB - 0.2

—

Table 17. 1.0 V I/O buffers DC characteristics (continued)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Table 18. RFACHAIN – GALGPS filter and VGA

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

S11(1)

1. Not tested in production.

Input return loss

GPS band

—

-8

fIF

IF frequency

PLL in default condition with

26Mhz as reference

—4.045

MHz

Noise figure

NF overall chain with AGC set

at 0 dB

—2(1)

Conversion gain from

RF input to ADC input

VGA at max gain

—

119

VGA at min gain

—

IP1dB

RF-IF-VGA input

compression point

VGA min

—

-80

dBm

IRR

Image rejection ratio

—

BWGPS

-3dB IF bandwidth

GPS mode

—

2.4

MHz

BWGAL

Galileo mode

—

4.8

MHz

ATT

Alias frequency

rejection

F = 60 MHz

(fs = 65.474 MHz)

—30(1)

TgGPS

IF filter group delay

variation

GPS mode

—

200(1)

TgGAL

Galileo mode

—

30(1)

Table 19. RFCHAIN – GLONASS/BeiDou filter and VGA

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

S11(1)

Input return loss

GLONASS band

-8

BeiDou band

-8

fIFGNS/BDU

IF frequency for

GLONASS

PLL in default condition

with 26 Mhz as

reference

—8.519

MHz

IF frequency for BeiDou

—

10.277

Noise figure

NF overall chain with

AGC set at 0 dB

—2(1)

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