SL6440 Ver la hoja de datos (PDF) - Zarlink Semiconductor Inc

Número de pieza

componentes Descripción

Fabricante

SL6440

High Level Mixer

Zarlink Semiconductor Inc 

SL6440

Fig.5 Intermodulation v. programming current

Fig.6 Supply current v. VCC2 (IP = 0)

APPLICATIONS

The SL6440 can be used with differential or singleended

inputs and outputs. A balanced input will give bettercarrier

leak The high input impedanceallowsstepup transformers to

be used if desired, whilst high output impedance allows a

choice of output impedance and conversion gain.

Fig. 2 shows the simplest application circuit. The input and

output are single-ended and Ip is supplied from VCC1 via a

resistor. Increasing RL will increase the conversion gain, care

being taken to choose a suitable value for VCC1.

Fig. 8 shows an application with balanced input, for

improved carrier leak, and balanced output for increased

conversion gain. A lower VCC1 giving lower device dissipation

can be used with this arrangement.

DESIGN PROCEDURE

1. Decide on input configuration using local oscillator data.

If using transformer on input, decide on ratio from noise

considerations.

2. Decide on output configuration and value of conversion

gain required.

3. Decide on value of lP and VCC2 using intermodulation and

compression point graphs.

4. Using values of conversion gain, VCC2, load and Ip

already chosen, decide on value of VCC1.

5. Calculate device dissipation and decide whether

heatsink is required from maximum operating temperature

conslderatlons.

Fig.7 Device dissipation v. IP

Fig.8 Typical application circuit for highest performance

Share Link: