Supertex inc.
Quad, High Speed, ±100V 850mA
Ultrasound Damper
Features
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HVCMOS
®
technology for high performance
High density integration ultrasound transmitter
0 to ±100V open-drain voltage
±850mA source and sink current
Up to 20MHz operation frequency
Matched delay times
1.8 to 5V CMOS logic interface
HV7370
General Description
The Supertex HV7370 is a four-channel, monolithic high voltage,
high-speed damper. It is designed for working with the HV738,
HV748 or HV758 for medical ultrasound waveform generators
requiring fast return-to-zero applications. The HV7370 consists of
a controller logic interface circuit, level translators, MOSFET gate
drives and high current power P-channel and N-channel MOSFETs
as the output stage for each channel.
The output stages of each channel are designed to provide peak
output currents of over ±0.85A for damping to ground, with up
to ±100V swing. The control from inputs to outputs uses direct
coupling topology, which not only saves components and PCB
layout space, but also makes the damping frequency function
down to DC.
Applications
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Block Diagram
+1.8 to 3.3V +9.0V
+75V V
PP
-9.0V 0 to +75V
C1
C2 C3
C4
VLL
OTP
EN
½½
½½
SUB
EN_PWR
MC0
MC1
PIN1
(+Pulse)
NIN1
(-Pulse)
Level
Translator
½½
½
C5
VDD
VSUB VPF
VPP
RGND
P-Driver
Medical ultrasound imaging
Piezoelectric transducer drivers
NDT ultrasound transmission
Pulse waveform generator
R
P1
TXP1
D1
D2
Level
Translator
N-Driver
TXN1
R
N1
RGND
HV
OUT
1
Supertex HV748
1 of 4 Channels
Pulser
+1.8 to 3.3V
Logic
GREF
VSS
VNF
V
NN
+9.0V
VNN
C7
0 to -75V
C6
½
+1.8 to 3.3V
+9.0V
+9.0V
-9.0V
C1
VLL
C2
VDD
C3
C4
VSUB VDP
X1
RGND
EN
SUB
EN_PWR
Level
Translator
P-Driver
PD1
D3
D4
IN1
(Damp)
Level
Translator
Damper
1 of 4 Channels
N-Driver
ND1
Supertex HV7370
VSS
VDN
C7
RGND
+9.0V
Supertex inc.
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
HV7370
Ordering Information
Package Option
Device
5.00x5.00mm body
1.00mm height (max)
0.50mm pitch
32-Lead QFN
HV7370
-G indicates package is RoHS compliant (‘Green’)
HV7370K6-G
Absolute Maximum Ratings
Parameter
V
SS
, power supply reference
V
LL
, positive logic supply
V
DD
, positive logic, level translator supply
(RGND - V
DP
), P-Gate driver supply
(V
DN
- RGND), N-Gate driver supply
RGND, RTZ-Ground voltage
All logic input PIN
X
, NIN
X
and EN voltages
VSUB substrate voltage
(ND
X
- RGND) damping N-MOSFET
BVSUB voltage
(PD
X
- RGND) damping P-MOSFET
BVSUB voltage
Maximum junction temperature
Storage temperature
Thermal resistance,
θ
JA
Value
0V
-0.5V to +7.0V
-0.5V to +13V
+0.5V to -13V
-0.5V to +13V
Pin Configuration
32
1
-2.0V to +2.0V
-0.5V to +7.0V
+120V
+120V
-120V
½½
+150°C
-65°C to 150°C
21.6°C/W
V
SUB
½½
Description
V
DD
, V
DN
, and V
DP
V
PP
and V
NN
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.
½
Power-Up Sequence of Pulser & Damper
Step
1
2
3
4
5
6
½½
½
HV7370
LLLLLL
YYWW
AAACCC
Step
1
2
3
4
5
6
32-Lead QFN (K6)
(top view)
Package Marking
L = Lot Number
YY = Year Sealed
WW = Week Sealed
A = Assembler ID
C = Country of Origin
= “Green” Packaging
Package may or may not include the following marks: Si or
32-Lead QFN (K6)
Power-Down Sequence of Pulser & Damper
Description
All logic control signals go to low
V
PP
and V
NN
(V
PP
- V
PF
) and (V
NF
- V
NN
)
V
DD
, V
DN
, and V
DP
V
LL
V
SUB
V
LL
with logic signal low
(V
PP
- V
PF
) and (V
NF
- V
NN
)
Logic control signals
Supertex inc.
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
2
HV7370
Operating Supply Voltages and Current (4 Channel Active)
Sym
V
LL
V
DD
V
DP
V
DN
V
SUB
RGND
I
LL
I
DDQ
I
DDEN
I
DDEN
I
DPQ
I
DPEN
I
DNQ
I
DNEN
Parameter
Logic voltage reference
Internal voltage supply
1
P-Gate driver supply
N-Gate drive supply
IC substrate voltage
RTZ-Ground voltage
V
LL
Current EN = Low
V
DD
Current EN = Low
V
DD
Current EN = High
V
DD
Current
V
DP
Current EN = Low
V
DP
Current
V
DN
Current EN = Low
V
DN
Current
Min
1.8
5.0
-12
5.0
5.0
-2.0
-
-
-
-
-
-
-
-
Typ
3.3
8.0 to 11
-V
DD
V
DD
V
DD
0
35
10
1.5
6.0
50
30
50
12
Max
5.0
12
-5.0
12
100
+2.0
120
-
3.0
-
-
-
-
-
(Operating conditions, unless otherwise specified, V
SS
= 0V,V
LL
= +3.3V,V
DD
= V
DN
= +9V, V
DP
= -9V, V
PP
- V
PF
= +9V, V
NN
- V
NF
= -9V, V
SUB
= +75V V
PP
/V
NN
= ±75V, T
A
= 25°C)
Units
V
V
V
V
V
V
µA
µA
mA
mA
µA
µA
mA
mA
Conditions
---
---
Negative voltage supply
Positive voltage supply
---
---
---
---
f = 0MHz
f = 5.0MHz, continuous, no loads
f = 0MHz
f = 5.0MHz, continuous, no loads
f = 0MHz
f = 5.0MHz, continuous, no loads
Note:
1. P&N-FETs best matching when V
DD
= V
DN
= +10V, V
PN
= -10V
½½
½½
Parameter
Min
2.0
1.0
3.5
Typ
3.7
V
DD
threshold
V
LL
threshold
1.25
4.25
4.5
UV threshold for V
DN
UV threshold for V
DP
1.75
Parameter
Min
0.6
-
-
0.6
-
-
Typ
13
50
0.85
12.5
20
Output saturation current
Channel resistance
Output capacitance
Output saturation current
Channel resistance
Output capacitance
0.85
Under Voltage
Sym
V
UVDD
V
UVLL
V
UVVDN
V
UVVDP
Electrical Characteristics
Sym
I
OUT
R
ON
(Operating conditions, unless otherwise specified, V
SS
= 0V,V
LL
= +3.3V,V
DD
= V
DN
= +9V, V
DP
= -9V, V
PP
- V
PF
= +9V, V
NN
- V
NF
= -9V, V
SUB
= +75V, V
PP
/V
NN
= ±75V, T
A
= 25°C)
Output P-Channel MOSFET, PDx
½
C
OSS
I
OUT
R
ON
C
OSS
Output N-Channel MOSFET, NDx
-
-
-
A
Ω
pF
---
I
DS
= 100mA
V
SUB
= 25V, f = 1.0MHz
Supertex inc.
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
3
½½
½
Max
7.0
1.5
4.75
6.0
Units
V
V
V
V
---
---
Max
-
-
-
Units
A
Ω
pF
---
Conditions
---
Typ V
UVVDP
≤ -(V
DN
/2), [V
DN
=
+9.0V]
Conditions
I
SD
= 100mA
V
SUB
= 25V, f = 1.0MHz
HV7370
Logic Inputs
Sym
V
IH
V
IL
I
IH
I
IL
C
IN
Parameter
Input logic high voltage
Input logic low voltage
Input logic high current
Input logic low current
Input logic capacitance
Min
(V
LL
-0.4)
0
-
-10
-
Typ
-
-
-
-
5
Max
V
LL
0.4
10
-
-
Units
V
V
µA
µA
pF
Conditions
---
---
---
---
---
AC Electrical Characteristics
Sym
t
rp
t
fn
f
OUT
t
EN
t
EN
t
drp
t
dfp
t
drn
t
dfn
Δt
DELAY-ON
Parameter
P-FET output rise time
N-FET output fall time
(Operating conditions, unless otherwise specified, V
SS
= 0V,V
LL
= +3.3V,V
DD
= V
DN
= +9V, V
DP
= -9V, V
PP
- V
PF
= +9V, V
NN
- V
NF
= -9V, V
SUB
= +75V V
PP
/V
NN
= ±75V, T
A
= 25°C)
Min
-
-
-
-
-
-
-
-
-
-
-
-
Typ
26
26
-
Max
-
-
20
10
-
-
-
-
-
-
-
Units
ns
ns
MHz
µs
Conditions
330pF//2.5kΩ load
---
Output frequency range
Enable time
Disable time
P-FET on delay time
P-FET off delay time
N-FET on delay time
N-FET off delay time
ON delay time matching
½½
½½
±3.0
±3.0
15
OFF delay time matching
Delay time jitter, rise or fall
Δt
DELAY-OFF
t
J
½
Supertex inc.
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
4
½½
½
180
2.8
22
18
22
18
500
ns
ns
ps
100Ω resistor load,
+10V to ND
X
and -10V to PD
X
8.2Ω resistor load
(see timing diagram)
P to N, channel to channel
V
PP
/V
NN
= ±25V, input rising 50%
to output PD
X
/ND
X
rising/falling
50%, with 100Ω load
HV7370
Switch Test Timing Diagram
PINx (Pulser)
NINx (Pulser)
INx (Damper)
0V
V
PP
V
LL
V
PP
10%
Output
t
rp
90%
90%
0V
0V
t
fn
10%
V
NN
V
LL
V
DD
V
SUB
EN
EN_PWR
Level
Translator
IN1
½½
SUB
P-Driver
½
½½
½½
Level
Translator
G
REF
N-Driver
½
V
DP
PD1
ND1
R2
R1
V
PP
1 of n Channels
V
NN
V
DN
50%
V
SS
INx
50%
INx
t
drn
t
dfn
I
OUT
t
dfp
t
drp
50%
NDx
0A
PDx
0A
50%
I
OUT
Supertex inc.
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
5
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