UPC2756TB 查看數據表（PDF） - NEC => Renesas Technology

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UPC2756TB

MIXER+OSCILLATOR SILICON MMIC FOR FREQUENCY DOWNCONVERTER OF L BAND WIRELESS RECEIVER

NEC => Renesas Technology 

µPC2756TB

PIN EXPLANATION

Pin

Symbol Assignment

No.

1

RFin

RF input

Applied

Voltage

V

–

2 GND

Ground

0

3

LO1 Local oscillator

–

base collector

4

LO2 Local oscillator

–

base collector

5

VCC Power supply 2.7 to 3.3

6 IF out

IF output

–

Pin

Voltage

VNote

Function and Application

Equivalent Circuit

1.2

This pin is RF input for mixer designed

VCC

as double balance type.

This circuit contributes to suppress

spurious signal with minimum LO and

bias power consumption.

Also this symmetrical circuit can keep

1

specified performance insensitive to

process-condition distribution.

This pin must be externally coupled to

front stage with capacitor for DC cut.

–

Must be connected to the system

ground with minimum inductance.

Ground pattern on the board should

be formed as wide as possible.

(Track length should be kept as short

as possible.)

1.2

These pins are both base-collector of

oscillator. This oscillator is designed

as differential amplifier type.

3 pin and 4 pin should be externally

equipped with tank resonator circuit in

order to oscillate with feedback loop.

1.2

Also this symmetrical circuit can keep

specified performance insensitive to

3

process-condition distribution.

Each pin must be externally coupled

to tank circuit with capacitor for DC

cut.

VCC

4

–

Supply voltage 3.0 ± 0.3 V for

operation. Must be connected bypass

capacitor (e.g. 1 000 pF) to minimize

ground impedance.

1.7

This pin is output from IF buffer

VCC

amplifier designed as single-ended

push-pull type.

This pin is assigned for emitter

6

follower output with low-impedance.

This pin must be externally coupled to

next stage with capacitor for DC cut.

Note Pin voltage is measured at VCC = 3.0 V

APPLICATION

This IC is guaranteed on the test circuit constructed with 50 Ω equipment and transmission line. This IC, however,

does not have 50 Ω input/output impedance, but electrical characteristics such as conversion gain and

intermodulation distortion are described herein on these conditions without impedance matching. So, you should

understand that conversion gain and intermodulation distortion at input level will vary when you improve VS of RF

input with external circuit (50 Ω termination or impedance matching).

External circuits of the IC are explained in a following application note.

• To RF and IF port : Application Note “Usage and Application Characteristics of µPC2757T, µPC2758T and

µPC8112T, 3-V Power Supply, 1.9-GHz Frequency Down Converter ICs for Cellular/Cordless Telephone and

Portable Wireless Communication” (Document No. P11997E)

4

Data Sheet P12807EJ2V0DS00

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