VENUS-QP1T データシートの表示（PDF） - Mitel Networks

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VENUS-QP1T

CDMA/AMPS Dual Band RF Receiver

Mitel Networks 

VENUS-L

Preliminary Information

CDMA IF

1

CDMA IFB

VCC

LO 2GHZ

GND

RF 900

GND

CHIP ENABLE

8

16

BAND 1900

GND

RF 1900

GND

LO 1GHZ

VCC

AMPS IFB

9

AMPS IF

QSOP16

Figure1 Pin Connections

Circuit Description

The RF section of VENUS-L contains all of the circuitry

necessary to downconvert the RF signal from 900 MHz

or 1900 MHz to an IF of 50-250 MHz, and to correctly

interface with a suitable IF SAW filter. Two RF inputs are

provided, one for the 1900MHz band and one for the 900

MHz band. The required input is activated by means of

the ‘BAND 1900’ pin.

The input is a gm stage which will provide a

characteristic impedance to correctly terminate the RF

image-reject SAW filter.

Two LO ports are provided, one for 1900MHz band and

one for 900 MHz band, both with low noise buffer

amplifiers.

External matching components are required on the RF,

LO and IF ports.

Pin Description

Pin No

Pin Name

1

CDMA IF

2

CDMA IFB

3

VCC

4

LO 2GHZ

5

GND

6

RF 900

7

GND

8

CHIP ENABLE

9

AMPS IF

10

AMPS IFB

11

VCC

12

LO 1GHZ

13

GND

14

RF 1900

15

GND

16

BAND 1900

Description

CDMA (1900MHz mixer) IF SAW output

CDMA (1900MHz mixer) IF SAW output bar

Positive supply

2 GHz LO input for 1900MHz mixer

Ground

900MHz RF input

Ground

Logic input for chip enable

AMPS (900MHz mixer) IF SAW output

AMPS (900MHz mixer) IF SAW output bar

Positive supply

1GHz LO input for 900MHz mixer

Ground

1900MHz RF input

Ground

Logic input to select 1900MHz or 900MHz signal path operation

2

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