Microchip CW01 Bedienungsanleitung

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 2017 Microchip Technology Inc.DS20005810A-page 1

CW01

Features

•Low Phase Noise

•100V Open Drain N-channel

•High-speed D Flip-flop

•High-speed MOSFET Gate Driver

•Up to 200 MHz Clock Input

•V

DD

and V

LL

Undervoltage Lockout

Applications

•Diagnostic Medical Ultrasound

•Fluid Flow Measurement

General Description

The CW01 is a 4-channel low-phase-noise continuous

wave transmitter IC. A high-speed D flip-flop is

provided to allow the D

IN

frequency to be aligned to a

high-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.

V

D1

, V

D2

, V

D3

and V

D4

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—V

D1

, V

D2

, V

D3

and

V

D4

. A series ferrite bead and a decoupling capacitor

are recommended on each V

DX

pin to minimize output

jitter and channel-to-channel crosstalk.

Both V

DD

and V

LL

have undervoltage lockout to

prevent spurious turn-on.

Package Type

See Table 2-1 for pin information.

24-lead QFN

(Top view)

OE

VSS

VD1

VD2

PGND1

HV

OUT

1

PGND2

HV

OUT

2

VSS

HV

OUT

3

PGND3

HV

OUT

4

VLL

VSS

VD4

VD3

PGND4

DIN1

DIN2

VDD

CLK

VSS

DIN3

DIN4

1

24

4-Channel Low-Phase-Noise Low-Power Continuous Wave Transmitter

Produktspezifikationen