Microchip CW01 Manual de Usario

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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
• VDD and VLL 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 DIN 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.
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 VDD and VLL 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
HVOUT
1
PGND2
HVOUT
2
VSS
HVOUT
3
PGND3
HVOUT
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
CW01
DS20005810A-page 2 2017 Microchip Technology Inc.
Functional Block Diagram
VDD
VLL
OE
DIN1
DIN2
DIN3
DIN4
CLK
VSS
VLL
VLL
VLL
VLL
VDD
VDD
VDD
VDD
VLL
UVLO
VDD
UVLO
DIN1
Q1
CLK
DIN2
Q1
CLK
DIN3
Q1
CLK
DIN4
Q1
CLK
VD1
HVOUT1
PGND1
VD2
HVOUT2
PGND2
VD3
HVOUT3
PGND3
VD4
HVOUT4
PGND4
SUB
2017 Microchip Technology Inc. DS20005810A-page 3
CW01
Typical Application Circuit
HV
OUT
1
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
IN1
CLK
VSS
DIN1
Q1
CLK
BAV99
Tx
PZT
8.0V
BAV23
(One of four channels)

Especificaciones del producto

Marca: Microchip
Categoría: No categorizado
Modelo: CW01

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