CXA1851 查看數據表（PDF） - Sony Semiconductor

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CXA1851

Up/Down Converter for 900 MHz-Band Mobile Communications

Sony Semiconductor 

CXA1851N

Pin No. Symbol

10 MIX OUT1

Typical pin

voltage (V)

2.3

11 MIX OUT2

2.3

12 GND

0.0

13 IF BYPASS

1.03

14 IF INPUT

1.03

15 OSC INPUT

1.8

(for UP

CONV.)

16 OSC

1.8

BYPASS

(for UP

CONV.)

17 OSC

1.85

BYPASS

(for DOWN

CONV.)

18 OSC

1.85

BYPASS

(for DOWN

CONV.)

19 Vcc

2.7 to 4.5

(for DOWN

CONV.)

20 IF OUTPUT 1.45

Equivalent circuit

10 11

14

13

REG

15

16

18

17

Description

MIX output pin for the up

converter.

MIX output pin 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.

GND pin for the oscillator buffer

amplifier and mixer blocks of the

up converter.

IF input by-pass pin for the up

converter.

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.

Oscillator input pin for the up

converter. A matching circuit

consisting of a 51Ω resistor is

necessary.

Oscillator input by-pass pin for the

up converter.

Oscillator input by-pass pin for the

down converter.

Oscillator input pin for the down

converter. A matching circuit

consisting of a 51Ω resistor is

necessary.

Power supply for the down

converter.

20

IF output pin for the down

converter.

—3—

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