MD1822

Manufacturer Part NumberMD1822
DescriptionHigh Speed Four Channel Mosfet Driver With Two Inverting And Two Non-inverting Outputs
ManufacturerSupertex, Inc.
MD1822 datasheet
 
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Supertex inc.
High Speed Four Channel MOSFET Driver with Two Inverting
and Two Non-Inverting Outputs
Features
Mixed inversion MOSFET driver
6.0ns rise and fall time
2.0A peak output source/sink current
1.8 to 5.0V input CMOS compatible
5.0 to 10V total supply voltage
Smart logic threshold
Low jitter design
Four matched channels
Drives two P- and two N-channel MOSFETs
Outputs can swing below ground
Low inductance, quad flat no-lead package
High performance, thermally enhanced
packaging
Applications
Medical ultrasound imaging
Piezoelectric transducer drivers
Nondestructive evaluation
PIN diode driver
CCD Clock driver/buffer
High speed level translator
Typical Application Circuit
0.1µF
+3.3V
PIN
3.3V CMOS
NIN
Logic Inputs
DMP
Supertex inc.
General Description
The Supertex MD1822 is a high speed, four channel MOSFET driver
designed to drive high voltage P- and N-channel MOSFETs for medical
ultrasound applications and other applications requiring a high output
current for a capacitive load. The high-speed input stage of the MD1822
can operate from a 1.8 to 5.0V logic interface with an optimum operating
input signal range of 1.8 to 3.3V. An adaptive threshold circuit is used to
set the level translator switch threshold to the average of the input logic
0 and logic 1 levels. The input logic levels may be ground referenced,
even though the driver is putting out bipolar signals. The level translator
uses a proprietary circuit, which provides DC coupling together with
high-speed operation.
The output stage of the MD1822 has separate power connections
enabling the output signal L and H levels to be chosen independently
from the supply voltages used for the majority of the circuit. As an
example, the input logic levels may be 0 and 1.8V, the control logic
may be powered by +5.0 and -5.0V, and the output L and H levels may
be varied anywhere over the range of -5.0 to +5.0V. The output stage
is capable of peak currents of up to ±2.0A, depending on the supply
voltages used and load capacitance present. The PE pin serves a dual
purpose. First, its logic H level is used to compute the threshold voltage
level for the channel input level translators. Second, when PE is low, the
outputs are disabled, with the A & C output high and the B & D output
low. This assists in properly precharging the AC coupling capacitors
that may be used in series in the gate drive circuit of an external PMOS
and NMOS transistor pair.
+10 V
+10 V
Supertex
0.47µF
MD1822
VDD
VH
PE
10nF
OUTA
INA
10nF
OUTB
INB
OUTC
INC
OUTD
IND
10nF
GND
VL
VSS
10nF
1235 Bordeaux Drive, Sunnyvale, CA 94089
MD1822
+100V
0.47µF
-100V
0.47µF
Supertex
HV
OUT
TC6320
Supertex
TC6320
Tel: 408-222-8888
www.supertex.com

MD1822 Summary of contents

  • Page 1

    ... P- and N-channel MOSFETs for medical ultrasound applications and other applications requiring a high output current for a capacitive load. The high-speed input stage of the MD1822 can operate from a 1.8 to 5.0V logic interface with an optimum operating input signal range of 1.8 to 3.3V. An adaptive threshold circuit is used to set the level translator switch threshold to the average of the input logic 0 and logic 1 levels ...

  • Page 2

    ... DD -4.0 V --- DD - µA No input transitions µ input transitions µ One channel on at 5.0Mhz, No load - 0.3 V For logic inputs INA, INB, INC, and IND 1.0 µA 1.0 µA 5.25 V 0.3 V For logic input PE - KΩ ● Tel: 408-222-8888 ● www.supertex.com MD1822 ...

  • Page 3

    ... C O Output OUTA OUTC ● Tel: 408-222-8888 ● www.supertex.com MD1822 OUTB OUTD ...

  • Page 4

    ... Shifter VSS VDD Level INB Shifter VSS VDD Level Shifter VSS VDD Level Shifter SUB GND VSS ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 4 OUTA OUTB OUTC OUTD VL VH OUTA VL VH OUTB VL VH OUTC VL VH OUTD VL ● Tel: 408-222-8888 ● www.supertex.com MD1822 ...

  • Page 5

    ... GND to PE, where PE is 1.8 to 5.0V. Good trace practices should be followed corresponding to the desired operating speed. The internal circuitry of the MD1822 is capable of operating up to 100MHz, with the primary speed limitation being the loading effects of the load capacitance. Because of this speed and the high transient currents that result with capacitive loads, the bypass capacitors should be as close to the chip pins as possible ...

  • Page 6

    ... MD1822 Delay vs Temperature -50 0 Temperature ( MD1822 Delay Voltage (V) DD Pin Description Pin # Function 1 INB 2 VDD 3 VSS 4 INC 5 IND 6 GND OUTC 9 OUTD 10 OUTA 13 OUTB INA Substrate Supertex inc. ...

  • Page 7

    ... No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the ©2010 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSFP-MD1822 A110110 e Note 1 (Index Area ...