CXA1851N datasheet(3/12 Pages) SONY

Il numero della parte	CXA1851N

Spiegazioni elettronici	Up/Down Converter for 900 MHz-Band Mobile Communications

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Produttore elettronici	SONY [Sony Corporation]

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CXA1851N

Typical pin

voltage (V)

10

MIX OUT1

2.3

MIX

output

for

the

up

converter.

11

MIX OUT2

2.3

MIX

output

for

the

up

converter. Connect an approxi-

mately 4.7 nH chip inductor and

an approximately 3.5 pF chip

capacitor between this pin and

Pin 10 to form a tank circuit.

12

GND

0.0

GND pin for the oscillator buffer

amplifier and mixer blocks of the

up converter.

13

IF BYPASS

1.03

IF input by-pass pin for the up

converter.

14

IF INPUT

1.03

IF input pin for the up converter.

Because of high impedance, an

external

matching

circuit

is

necessary which consists of a 220

nH

chip

inductor

and

an

approximately

1.5

pF

chip

capacitor.

15

OSC INPUT

1.8

Oscillator input pin for the up

(for UP

converter. A matching circuit

CONV.)

consisting of a 51

Ω resistor is

necessary.

16

OSC

1.8

Oscillator input by-pass pin for the

BYPASS

up converter.

(for UP

CONV.)

17

OSC

1.85

Oscillator input by-pass pin for the

BYPASS

down converter.

(for DOWN

CONV.)

18

OSC

1.85

Oscillator input pin for the down

BYPASS

converter. A matching circuit

(for DOWN

consisting of a 51

Ω resistor is

CONV.)

necessary.

19

Vcc

2.7 to 4.5

Power supply for the down

(for DOWN

converter.

CONV.)

20

IF OUTPUT

1.45

IF output pin for the down

converter.

10

11

REG

13

14

15

16

17

18

20

Pin No.

Symbol

Equivalent circuit

Description

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