Supertex inc.

Supertex inc.

1235 Bordeaux Drive, Sunnyvale, CA 94089

Tel: 408-222-8888

www.supertex.com

CW01

Features

Applications

General Description

The Supertex CW01 is a four-channel, low phase noise,

continuous wave transmit IC. A high speed D flip-flop is

provided to allow the D

frequency clock. The output N-channel is turned on when a

logic high is clocked into the D flip-flop. Data are clocked in

during the low to high transition.

VD1, VD2, VD3 and VD4 are four individual input supply

voltages for the N-channel output MOSFET gate drivers.

High peak currents are drawn from these gate drives

when the output MOSFETs are switching. To minimize

jitter caused by voltage ripples, each channel has its own

gate drive voltage pin; VD1, VD2, VD3 and VD4. A series

ferrite bead and a decoupling capacitor are recommended

on each VDX pin to minimize output jitter and channel to

channel crosstalk.

Both V

spurious turn-on.

Typical Application Circuit

Four-Channel, Low Phase Noise,

Low Power, Continuous Wave Transmitter

HV

PGND1

Translator

and Driver

V

D1

V

LL

270µH

0.1µF

0.1µF

5.0V

2.5V

2.0 to

5.0MHz

96MHz

VD1

VDD

OE

VLL

D

CLK

VSS

D

Q1

CLK

BAV99

Tx

PZT

8.0V

BAV23

(one of four channels)