Supertex inc.
High Speed, Integrated Ultrasound Driver IC
Features
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Drives two ultrasound transducer channels
Generates five-level waveform
Drives 12 high voltage MOSFETs
±2.0A source and sink peak current
Up to 20MHz output frequency
12V/ns slew rate
±3.0ns matched delay times
Second harmonic is less than -40dB
Two separate gate drive voltages
1.8 to 3.3V CMOS logic interface
MD1712
General Description
The
Supertex MD1712 is a two-channel, five-level, high
voltage and high speed transmitter driver IC. It is designed
for medical ultrasound imaging applications, but can also be
used for metal flaw detection, Non-Destructive Testing (NDT),
and for driving piezoelectric transducers.
The MD1712 is a two-channel logic controller circuit with
low impedance MOSFET gate drivers. There are two sets of
control logic inputs, one for channel A and one for channel B.
Each channel consists of three pairs of MOSFET gate drivers.
These drivers are designed to match the drive requirements of
the Supertex TC6320. The MD1712 drives six TC6320s. Each
pair consists of an N-channel and a P-channel MOSFET. They
are designed to have the same impedance and can provide
peak currents of over 2.0 amps.
Applications
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Medical
ultrasound imaging
Piezoelectric transducer drivers
Non-Destructive Testing (NDT)
Metal flaw detection
Sonar transmitter
Typical Application Circuit
+5.0V
0.22µF
+10V
40
FB
AVDD1
0.1µF
EN
SEL
POSA / POS1A
NEGA / NEG1A
HVEN1A / POS2A
HVEN2A / NEG2A
CLAMPA
+3.3V
0.1µF
6
47
13
1
2
3
4
5
46
VLL
DV
DD
1
41 OUTPA2
-100V
+50V
V
PP
2
1µF
10nF
36
35
33
45
43
DVDD2
DGND DVDD1 DVSS
+10V
0.22µF
-10V
0.22µF
0.22µF
42
31
0.22µF
TC6320
+100V
V
PP
1
1µF
OUTPA1
10nF
DV
DD
2
37
OUTNA1
10nF
V
NN
1
1µF
+10V
DGND DVDD1 DGND
DV 2 30
DD
39
Control Logic
& Level
Translator
MD1712
(1/2 of I/O)
DV
DD
1
34 OUTNA2
10nF
48
0.1µF
AVSS
-50V
0V
14
15
AVSS
SUB
AVSS
44
V
SS
DV
DD
2
32
DGND
18
0
0.22µF
+10V
-10V
+10V
+5.0V
0
DVDD1
DVSS
DVDD1
DVDD2
19
16
21
28
DVDD2
DGND
26
25
0V
OUTPA3
V
NN
2
1µF
TRANSDUCER
0.1µF
OUTNA3
-10V
AGND
7
Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA 94089
Tel: 408-222-8888
www.supertex.com
MD1712
Ordering Information
Device
Pin Configurations
7.00x7.00mm body
1.00mm height (max)
0.50mm pitch
Package Options
48-Lead QFN
7.00x7.00mm body
1.60mm height (max)
0.50mm pitch
48-Lead LQFP
1
48
MD1712
MD1712FG-G
MD1712K6-G
48-Lead LQFP (FG)
(top view)
48
1
-G indicates package is RoHS compliant (‘Green’)
48-Lead QFN (K6)
(top view)
Package Marking
Top Marking
Absolute Maximum Ratings
Parameter
V
LL
logic supply voltage
AV
DD
1, DV
DD
1, positive gate drive supply
DV
DD
2, positive gate drive supply
AV
SS
, DV
SS
, negative gate drive supply
Thermal resistance (θ
JA
):
48-Lead LQFP*
48-Lead QFN*
Maximum junction temperature
Storage temperature
Power dissipation
Value
-0.5V to +5.5V
-0.5V to +15V
-0.5V to +15V
-15V to +0.5V
50°C/W
29°C/W
+125C
-65°C to 150°C
1.2W
YYWW
MD1712FG
LLLLLLLLL
Bottom Marking
CCCCCCCC
AAA
YY = Year Sealed
WW = Week Sealed
L = Lot Number
C = Country of Origin*
A = Assembler ID*
= “Green” Packaging
*May be part of top marking
Package may or may not include the following marks: Si or
48-Lead LQFP (FG)
MD1712K6
LLLLLLLLL
YYWW
AAA CCC
L = Lot Number
YY = Year Sealed
WW = Week Sealed
A = Assembler ID
C = Country of Origin
= “Green” Packaging
Absolute Maximum Ratings are those values beyond which damage to the
device may occur. Functional operation under these conditions is not implied.
Continuous operation of the device at the absolute rating level may affect
device reliability. All voltages are referenced to device ground.
* 1.0oz 4-layer 3x4” PCB
Package may or may not include the following marks: Si or
48-Lead QFN (K6)
Operating Supply Voltages and Currents
Sym
V
LL
AV
DD1
DV
DD1
DV
DD2
I
VLL
I
AVDD1
I
AVSS &
I
DVSS
I
DVDD1
Parameter
Logic supply
Positive drive bias supply
Positive gate drive supply
Positive gate drive supply
Logic supply current
Positive bias current
Negative drive and bias supply current
Positive drive current 1
Min
+1.8
+8.0
+4.75
+4.75
-12.0
-
-
-
-
(Over operating conditions unless otherwise specified, AV
DD
1 = DV
DD
1 = DV
DD
2 = 10V, AV
SS
= DV
SS
= -10V, V
LL
= 3.3V, T
A
= 25°C)
Typ
+3.3
+10
-
-
-10
2.0
5.0
20
55
Max
+5.0
+12.6
+12.6
+12.6
-8.0
-
-
-
-
Units Conditions
V
V
V
V
V
---
---
---
---
---
AV
SS,
DV
SS
Negative gate drive and bias supply
mA
All channels on at 5.0Mhz,
no load
Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA 94089
2
Tel: 408-222-8888
www.supertex.com
MD1712
Operating Supply Voltages and Currents
(cont.)
(Over operating conditions unless otherwise specified, AV
DD
1 = DV
DD
1 = DV
DD
2 = 10V, AV
SS
= DV
SS
= -10V, V
LL
= 3.3V, T
A
= 25°C)
I
DVDD2
I
AVDD1Q
I
AVSSQ
I
DVDD1Q
I
DVDD2Q
I
VLLQ
Positive drive current 2
V
AVDD
1 quiescent current
V
AVSS
quiescent current
V
DVDD
1 quiescent current
V
DVDD
2 quiescent current
Logic supply current
-
-
-
-
-
-
13
2.0
0.75
-
-
1.0
-
-
-
10
10
-
mA
mA
mA
µA
µA
mA
All channels on at 5.0Mhz,
D
VDD
2 = 5.0, no load
EN = low, All inputs low or high.
DC Electrical Characteristics
P-Channel Gate Driver Outputs
Sym
R
SINK
R
SOURCE
I
SINK
I
SOURCE
Parameter
Output sink resistance
Output source resistance
Peak output sink current
Peak output source current
(Over operating conditions unless otherwise specified, AV
DD
1 = DV
DD
1 = DV
DD
2 = 10V, AV
SS
= DV
SS
= -10V, V
LL
= 3.3V, T
A
= 0 to 70°C)
Min
-
-
-
-
Typ
-
-
2.0
2.0
Max
6.0
6.0
-
-
Units Conditions
Ω
Ω
A
A
I
SINK
= 100mA
I
SOURCE
= 100mA
---
---
N-Channel Gate Driver Outputs
Sym
R
SINK
R
SOURCE
I
SINK
I
SOURCE
Parameter
Output sink resistance
Output source resistance
Peak output sink current
Peak output source current
Min
-
-
-
-
Typ
-
-
1.5
1.5
Max
10
10
-
-
Units Conditions
Ω
Ω
A
A
I
SINK
= 100mA
I
SOURCE
= 100mA
---
---
Logic Inputs
Sym
V
IH
V
IL
I
IH
I
IL
Parameter
Input logic high voltage
Input logic low voltage
Input logic high current
Input logic low current
Min
0.8V
LL
0
-
-1.0
Typ
-
-
-
-
Max
V
LL
0.2V
LL
1.0
-
Units Conditions
V
V
µA
µA
---
---
---
---
Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA 94089
3
Tel: 408-222-8888
www.supertex.com
MD1712
AC Electrical Characteristics
Sym
f
OUT
t
PH
t
PL
t
r
t
f
Δt
DM
Δt
DLAY
SR
HD2
Parameter
Output frequency range
Propagation delay when
output is from low to high
Propagation delay when
output is from high to low
Output rise time
Output fall time
Delay time matching
Output jitter
Output slew rate
2
nd
harmonic distortion
(Over operating conditions unless otherwise specified, AV
DD
1 = DV
DD
1 = DV
DD
2 = 10V, AV
SS
= DV
SS
= -10V, V
LL
= 3.3V, T
A
= 0 to 70°C)
Min
-
-
-
-
-
-
-
-
-
Typ
-
19
19
8.0
8.0
-
30
12
-40
Max
20
-
-
-
-
±3.0
-
-
-
Units Conditions
MHz
ns
ns
ns
ns
ns
ps
V/ns
dB
---
No load, see timing diagram
No load, see timing diagram
1000pF load, see timing diagram
1000pF load, see timing diagram
No load, from device to device
Standard deviation of t
D
samples (1k)
Measured at TC6320 output
with 100Ω load
Power-Up Sequence
Step
1
2
Connection
AV
SS
, DV
SS
V
LL
, AV
DD
1, DV
DD
1 & DV
DD
2
Description
Negative gate drive supply and substrate bias
Logic supply, positive gate drive supply and bias
Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA 94089
4
Tel: 408-222-8888
www.supertex.com
MD1712
Truth Table for Channels A and B (For SEL = L)
Logic Control Inputs
SEL
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
EN
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
HVEN1/
POS2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
HVEN2/
NEG2
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
X
Clamp
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
X
POS/
POS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
X
NEG/
NEG1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
X
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
V
PP
1 to V
NN
1 Output V
PP
2 to V
NN
2 Output V
PP
3 to V
NN
3 Output
HV
OUT
P1
HV
OUT
N1
HV
OUT
P2
HV
OUT
N2
HV
OUT
P3
ON
ON
ON
OFF
HV
OUT
N3
ON
ON
ON
OFF
Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA 94089
5
Tel: 408-222-8888
www.supertex.com
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