Használati útmutató Microchip MD1822DB1

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Supertex inc.
Supertex inc.
www.supertex.com
MD1822DB1
Doc.# DSDB-MD1822DB1
A032913
MD1822 + TC7920: Three Level
High Speed ±100V 2.0A Pulser Demoboard
Demoboard Features
►Ultrasound high voltage & high current RTZ pulser
►MD1822 driving TC7920 with two pairs of MOSFETs
►3-level voltage pulse waveform outputs
►±2.0A source and sink current capability
►40 MHz frequency clock on board
►Programmable logic waveform generation
►JTAG connection for CPLD programming
►Connectors for external clock and signals
►3.3V CMOS logic interface
Applications
►Medical ultrasound imaging
►Piezoelectric transducer drivers
►Material aw detection
►ATE and waveform generator
►Transducer power driver
►Capacitive and MEMS sensor driver
►Ultrasonic NDT detection and sonar ranger
General Description
The MD1822DB1 is a demoboard for the three level ±100V
2.5A pulser chip-set of the MD1822 MOSFET driver and the
TC7920 MOSFET. The demoboard consists of one MD1822
in the 3x3mm 16-lead QFN package driving the TC7920
which has two pairs of high speed and high voltage compli-
mentary P- and N-MOSFETs in in one 4x4mm, 8-lead DFN
package. This circuit is an ideal, cost-optimized, high voltage
and high current RTZ ultrasound transmit pulser.
The CPLD-programmable logic circuit (40 MHz crystal os-
cillator) generates accurately timed high-speed waveforms
on a separate CPL board. Multiple frequency and waveform
combinations can be selected as bipolar pulse waveforms.
An external clock input can be used if the on-board oscil-
lator is disabled. The external trigger input can be used to
synchronize the output waveforms. There are ve push
buttons for selecting demonstration waveform, frequency,
phase, and mode functions. Color LEDs indicate the demo
selection states. Jumpers on the board can select either the
330pF/2.5k on-board load, or user test loads.
Block Diagram
Waveform
Generator
CPLD
+3.3V
OSC
6
JTAG
EXCLK
EXT
CLKIN
5
WAVE
FREQ
SEL
CLMP
ENAB
LED1
LED2
PWR
ENA
MOD
RL
2.5k
CL
330pF
XDCR
TC7920
-100V
VNN
+100V
VPP
X1
VSS/VL
MD1822
+12V
VDD/VH
40MHz
EXTRG
EN
PE
INA
INB
INC
IND

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Termékspecifikációk

Márka: Microchip
Kategória: nincs kategorizálva
Modell: MD1822DB1

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