HV254
Demo Kit
Available
32-Channel High Voltage Amplifier Array
Block Diagram
V+ V
PP
Features
❑
32 independent high voltage amplifiers
❑
Output voltage up to 250V
❑
3V/µs output slew rate
❑
Fixed gain of 50V/V
❑
High value internal feedback resistors
❑
Very low operating current (typically 45µA per channel)
❑
Integrated silicon diode for temperature sensing
Anode
Cathode
V
IN
0
Application
❑
MEMS (microelctromechanical systems) driver
❑
Piezoelectric transducer driver
❑
Optical crosspoint switches (using MEMS technology)
V
IN
1
R
General Description
The Supertex HV254 is a 32-channel high voltage amplifier
array integrated circuit. It operates on a 275V high voltage
supply and two low voltage supplies: +5.0V and –5.0V. Each
channel has its own input and output. An integrated diode is
included to help monitor die temperature.
The input voltage can be from a DAC with a voltage range of 0V
to the low voltage supply, V+. The output of the HV254FG will
swing from 7V to 250V. It cannot swing to ground. With the
internal gain set at 50V/V, a minimum input signal of 140mV will
still maintain linearity. Input voltages below 140mV can be
applied without damage to the device. The amplifier, however,
will be saturated.Typical output load is equivalent to a 125Mohm
resistor in parallel with a 100pF capacitor. The outputs have a
guaranteed slew rate of at least 3V/µs. The internal closed loop
gain is set at a nominal value of 34.0dB (50V/V).
The HV254 is designed to operate with minimal power con-
sumption while maintaining a guaranteed slew rate of 3V/µs.
High value resistors are used for the gain setting to minimize
current on the feedback path.
R
PGND
49R
R
A113004
+
V
IN
31
+
+
HV
OUT
0
V-
49R
-
V+ V
PP
HV
OUT
1
V-
49R
-
V+ V
PP
HV
OUT
31
-
V-
HV254
Ordering Information
Device
HV254
Maximum Output Voltage
250V
Package Options
100 Lead MQFP
HV254FG
Die
HV254X
Absolute Maximum Ratings*
V
PP
, High voltage supply
V+, Low voltage positive supply
V-, Low voltage negative supply
HV
OUT
, Output voltage
V
IN
, Analog input signal
Storage temperature range
Maximum junction temperature
*
Absolute
275V
7.0V
-7.0V
0V to 275V
0V to 5.0V
-65°C to 150°C
150°C
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.
Electrical Characteristics
Symbol
Parameter
(Over operating conditions unless otherwise noted.)
Min
Typ
Max
Units
Conditions
Operating Conditons
V
PP
V+
V-
I
PP
I+
I-
T
A
T
J
High voltage positive supply
Low voltage positive supply
Low voltage negative supply
V
PP
supply current
V+ supply current
V
NN
supply current
Ambient temperature range
Junction temperature range
-10
-10
50
4.75
-4.75
1.0
5.0
-5.0
275
5.25
-5.25
2.5
1.0
-3.0
70
TBD
125
V
V
V
mA
mA
mA
°C
°C
V
PP
=275V, All inputs set at 140mV.
Typically 45
µ
A per channel
V+ = 5.25V
V- = -5.25V
High Voltage Amplifier Output
HV
OUT
V
IN
HV
OS
SR
R
FB
A
V
BW
C
LOAD
HV
OUT
voltage swing
Input Voltage Range
HV
OUT
DC offset
HV
OUT
slew rate
Feedback impedance
Closed loop gain
HV
OUT
-3dB channel bandwidth
HV
OUT
capacitive load
Stability (max drift)
3.0
8
47.5
5.0
0
100
500
12
50.0
52.5
7.0
0.14
±1.5
250
V+
±1.52
V
V
V
V/
µs
MΩ
V/V
KHz
pF
mV
Measured at HV
OUT
V
PP
= 275V
V
PP
= 275V. 30mV input offset
V
PP
= 275V, Load = 125M
Ω
//100pF
V
PP
= 275V, Load=125M
Ω
//100pF
2
A113004
HV254
Diode
Symbol
Parameter
Min
Typ
Max
Units
Conditions
Power Up/Down Sequence
The device can be damaged due to improper power up / down
sequence. To prevent damage, please follow the acceptable
power up /down sequences and add two external diodes as shown
in the diagram below. The first diode is a high voltage diode
across Vpp and V+ where the anode of the diode is connected to
V+ and the cathode of the diode is connected to Vpp. Any low
current high voltage diode such as a 1N4004 will be adequate.
The second diode is a schottky diode across V- and DGnd where
the anode of the schottky diode is connected to V- and the cathode
is connected to DGnd. Any low current schottky diode such as a
1N5817 will be adequate.
V+
1N4004
or similar
V-
1N5817
or similar
V
PP
PGND
Acceptable Power Up Sequences
1) V
PP
or
1) V-
2) V-
2) V+
3) V+
3) V
PP
4) Inputs & Anode
4) Inputs & Anode
Acceptable Power Down Sequences
1) Inputs & Anode
or
1) Inputs & Anode
2) V+
2) V
PP
3) V-
3) V+
4) V
PP
4) V-
Pin Description
V
PP
V+
V-
PGND
Anode
Cathode
V
IN
0 to V
IN
31
HV
OUT
0 to HV
OUT
31
High voltage positive supply.
Analog low voltage positive supply
Analog low voltage negative supply
Device ground
Anode side of a low voltage silicon diode that can be used to monitor die
temperature.
Cathode side of a low voltage silicon diode that can be used to monitor die
temperature.
Amplifie.r inputs
Amplifier outpu.ts
3
A113004
HV254
Pin Configuration
100
1
81
80
100-Lead MQFP
(top view)
30
31
50
51
Pin Configuration
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Function
HV
OUT
29
HV
OUT
28
HV
OUT
27
HV
OUT
26
HV
OUT
25
HV
OUT
24
HV
OUT
23
HV
OUT
22
HV
OUT
21
HV
OUT
20
HV
OUT
19
HV
OUT
18
HV
OUT
17
HV
OUT
16
HV
OUT
15
HV
OUT
14
HV
OUT
13
HV
OUT
12
HV
OUT
11
HV
OUT
10
HV
OUT
9
HV
OUT
8
HV
OUT
7
HV
OUT
6
HV
OUT
5
Pin #
26
27
28
29
30
31
32
33
34
35
36
37
38
39*
40
41
42
43
44
45
46
47
48
49
50
Function
HV
OUT
4
HV
OUT
3
HV
OUT
2
HV
OUT
1
HV
OUT
0
NC
NC
NC
NC
NC
V
PP
V
PP
NC
Ibias
NC
V-
V-
Anode
Cathode
V+
V+
NC
PGND
V
IN
0
V
IN
1
Pin #
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
Function
V
IN
2
V
IN
3
V
IN
4
VI
IN
5
V
IN
6
V
IN
7
V
IN
8
V
IN
9
V
IN
10
V
IN
11
V
IN
12
V
IN
13
V
IN
14
V
IN
15
VI
IN
16
V
IN
17
V
IN
18
V
IN
19
V
IN
20
V
IN
21
V
IN
22
V
IN
23
V
IN
24
V
IN
25
V
IN
26
Pin #
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Function
V
IN
27
V
IN
28
V
IN
29
V
IN
30
V
IN
31
PGND
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
HV
OUT
31
HV
OUT
30
* For internal testing only. Leave floating.
NC=No Connect.
4
A113004
HV254
Pad Configuration
(Not Drawn to Scale)
HV
OUT
31
HV
OUT
30
HV
OUT
29
HV
OUT
28
HV
OUT
27
HV
OUT
26
HV
OUT
25
HV
OUT
24
HV
OUT
23
HV
OUT
22
HV
OUT
21
HV
OUT
20
HV
OUT
19
HV
OUT
18
HV
OUT
17
HV
OUT
16
HV
OUT
15
HV
OUT
14
HV
OUT
13
HV
OUT
12
HV
OUT
11
HV
OUT
10
HV
OUT
9
HV
OUT
8
HV
OUT
7
HV
OUT
6
HV
OUT
5
HV
OUT
4
HV
OUT
3
HV
OUT
2
HV
OUT
1
HV
OUT
0
PGND
V
IN
31
V
IN
30
V
IN
29
V
IN
28
V
IN
27
V
IN
26
V
IN
25
V
IN
24
V
IN
23
V
IN
22
V
IN
21
V
IN
20
V
IN
19
V
IN
18
V
IN
17
V
IN
16
V
IN
15
V
IN
14
V
IN
13
V
IN
12
V
IN
11
V
IN
10
V
IN
9
V
IN
8
V
IN
7
V
IN
6
V
IN
5
V
IN
4
V
IN
3
V
IN
2
V
IN
1
V
IN
0
Cathode
Anode
5
PGND
V-
V-
V+
V
PP
V
PP
V+
A113004
微控制器 MCU
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