UPB1008K-A データシートの表示（PDF） - California Eastern Laboratories.

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UPB1008K-A

NEC's LOW POWER GPS RF RECEIVER

California Eastern Laboratories. 

PIN FUNCTIONS

Pin No.

Symbol

12

I/Q Balance

Control

Function and Application

The voltage on this pin controls the Q channel

IF Amplifier Gain. Gain control of ±2 dB can be

achieved for 0~3 V.

Leave open-circuited if not used.

Qgain

0V

1.5 V

3V V

13

PD1

Standby mode control.

Low=whole chip OFF & High=Whole chip ON.

14

2IFout-Q

Differential ouptut pins of quadrature demodulator

15

2IFout-Qb

Q output. Adding a lowpass shunt capacitor

between these pins will define the IF Bandwidth.

16

DC offset Q DC offset compensation pin for C arm. A low pass

capacitor shunt to Pin 17 is required.

17 DC offset Qb DC offset compensation pin for Q-bar arm.

A low pass capacitor shunt to Pin 16 is required.

UPB1008K

Internal Equivalent Circuit

28

idc=23.5u

12

idc=23.5u

Iref

CCCS

r=7.1k

r=7.1k

r=7.1k

r=7.1k

32

VCC

ESD

13

ESD

r=28k

11

28

r=2k

r=2k

ESD

ESD

idc=86u

idc=86u

ESD

ESD

32

15,(26)

14,(27)

28

r=4k

r=4k

ESD

ESD

idc=84u

r=20k

idc=84u

c=9p

ESD

ESD

17,(24)

16,(25)

32

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