UPB1008 データシートの表示（PDF） - NEC => Renesas Technology

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UPB1008

REFERENCE FREQUENCY 27.456 MHz, 2ndIF FREQUENCY 132 kHz RF/IF FREQUENCY DOWN-CONVERTER + PLL FREQUENCY SYNTHESIZER IC FOR GPS RECEIVER

NEC => Renesas Technology 

µPB1008K

Pin

Pin Name

No.

Function and Application

24

DCoffsetlb DC offset compensation pin for

l-bar arm. A low pass capacitor

shunt to pin 25 is required.

25

DCoffsetl

DC offset compensation pin for

I-bar arm. A low pass capacitor

shunt to pin 24 is required.

26

2ndIFout-Ib Differential output pins of

quadrature demodulator I

27

2ndIFout-I

output. Adding a lowpass shunt

capacitor between these pins

will define the IF bandwidth.

28

VCCanalog

Supply voltage pin of analog

portion of the chip.

Internal Equivalent Circuit

See pin 16 & 17 schematic

See pin 14 & 15 schematic

28

29

VAGC

Gain control voltage pin of IF

amplifier. This voltage performs

reverse control, (i.e., VAGC up →

gain down). If this pin is left

open, then it is default at

maximum gain.

30

IF-in1

Differential input pins of 1stIF

AGC amplifier.

31

IF-in2

ESD

29

ESD

300 Ω

44 kΩ

To AGC Amp

3 kΩ

32

28

4 kΩ

2 kΩ 2 kΩ

4 kΩ

32

GNDanalog

Ground pin of analog portion of

the chip.

Regulator

ESD 4 kΩ

30

40 Ω

4 kΩ

ESD

1.42 kΩ

1.42 kΩ

32

ESD

31

ESD

Data Sheet PU10282EJ01V0DS

7

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