DSM VF-150 OEM User manual

205 Williamson Square
Franklin, TN 37064
Tel: [phone]
Fax: [phone]
114 Southeast Parkway Ct.
Ste 160
Franklin, TN 37064
Tel: [phone]
Fax: [phone]
Ma0
VF-150 OEM
LINEAR AMPLIFIER
USER MANUAL
DYNAMIC STRUCTURES AND MAT E R I A L S ,LLC
HARDWARE VERSION V131028, MANUAL VERSION V131118

Hardware Version V131028 1
205 Williamson Square
Franklin, TN 37064
Tel: [phone]
Fax: [phone]
114 Southeast Parkway Ct.
Ste 160
Franklin, TN 37064
Tel: [phone]
Fax: [phone]
VF-150 OEM
Please review the following points for both personal and equipment safety while operating the
linear piezoelectric amplifier.
HIGH ENERGY/VOLTAGE WARNINGS
Exercise caution when using amplifiers. High energy levelscan be
stored at the output voltage terminals on all amplifiers in normal
operations. In addition, potentially lethal voltages exist in the power
circuit and the “output” connector. Filter capacitors store potentially
dangerous energy for some time after power is removed.
OPERATING AND SERVICES PRECAUTIONS
Operate the amplifier in an environment free of flammable gases or fumes. Do not use substitute
parts or make any unauthorized modifications to the amplifier to ensure that its safety features
are not degraded. Contact DSM for service and repair assistance.
SPECIFICATIONS
•Typical Output Voltages: -100 to +100 V
-40 to +200 V
-30 to +150 V
-20 to +120 V
Output range will be VNeg Rail + 5V to VPos Rail –5V
•Maximum Continuous Current: 150 mA (Capacitive load)
•Maximum Peak Current: 300 mA (Capacitive load)
•Gain V/V ~58 +/-5% (see AGA command)
•Dimensions: L x W x H 2.0” x 1.0” x 0.5” (50.8mm x 25.4mm x 12.7mm)
•Dimensions: L x W x H with heat sink 2.0” x 1.0” x 1.0” (50.8mm x 25.4mm x 25.4mm)
•Amplifier bandwidth: ~10 kHz (-3dB)
•Electrical Noise on Output: ~1mVrms (power supply dependent)
•Short circuit, over-current, and over-temperature protection
•Connectors: FCI 10106813-021112LF
FCI 10106813-041112L
!
CAUTION
RISK OF DANGER

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205 Williamson Square
Franklin, TN 37064
Tel: [phone]
Fax: [phone]
114 Southeast Parkway Ct.
Ste 160
Franklin, TN 37064
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WARNING!
General Precautions
♦All insulation of leads connected to output terminals should have at least a 300V rating.
♦Do not use clip leads in the connections. They are very dangerous for high-voltage work.
Acceptable Load Types
♦This Amplifier is designed to drive capacitive loads only. Do not use with resistive loads.
The driver will only work properly when a capacitive load is connected to the output.
♦Never connect an inductive or a resistive load to the unit. This would cause a short-lived
high-current pulse at the output and would damage the unit.
Short Circuit Damage
♦Although the VF-150 OEM is protected against a short circuit on the output, it is
recommended that a short circuit condition be avoided.
♦Never connect an "earth ground" lead (e.g., an oscilloscope ground lead) to the output
terminal. This can cause high current at the output and possible damage to the unit.
♦If the user desires to observe the output signals using a voltage meter or an oscilloscope, the
user must ensure that the meter or oscilloscope has an input impedance of at least 1 MΩ.
Smaller input impedancescould damage the unit.
RECOMMENDED OPERATION
Intended Use
DSM’s VF-150 OEM is intended to drive piezoelectric (capacitive) loads of the following types:
•Operating range –100 to +100V
•Operating range –40 to +200 V
•Operating range –30 to +150V
•Operating range –20 to +120 V
External power supply determines configuration. The input rail voltages should both be 5 to 10
Volts beyond the operating range. For example if -30 to +150 Volt operation is requred,typical
rail voltages would be -40 and +160 Volts.Two modes of operation are supported; the output
voltage can be set using an analog input voltage with nominal gain of 58, or the output voltage
can be set using a serial communication interface. Operation is decribed in more detail, below.

Hardware Version V131028 3
205 Williamson Square
Franklin, TN 37064
Tel: [phone]
Fax: [phone]
114 Southeast Parkway Ct.
Ste 160
Franklin, TN 37064
Tel: [phone]
Fax: [phone]
Block Diagram of VF-150 OEM
Description
The VF-150 OEM is a board mountable linear piezo amplifier module with an integrated 16-bit
digital to analog converter (DAC). This module is designed to be mounted directly to a
customer’s printed circuit board.
The VF-150 OEM output voltage can be controlled in 3 ways:
1. An analog voltage can be connected to the analog input. This signal will be summed
with the DAC and amplified by a gain of about 58V/V. The default DAC voltage is 0V.
2. In the default configuration the DAC output voltage is controlled through an SPI
communication bus.
3. Optionally the DAC can be user configured to be connected to the onboard controller
with communications to the controller and the DAC through an asynchronous serial
protocol.
In all mode the output of the DAC and the analog input are summed at the input to the amplifier.
Only one of the inputs needs to be used to drive the amplifier. It is recommended that the analog
input be connected to ground if it is not used to reduce the risk of noise being picked up by the
input. A list of the serial command along with the communication protocol will be presented in a
later section.

Hardware Version V131028 4
205 Williamson Square
Franklin, TN 37064
Tel: [phone]
Fax: [phone]
114 Southeast Parkway Ct.
Ste 160
Franklin, TN 37064
Tel: [phone]
Fax: [phone]
Instructions for Use
Start-Up / Shut-Down Procedure:
DSM recommends that the unit be connected to a load (capacitive, such as a piezoelectric device
of the appropriate rating) during start-up and while the unit is running; operating without a load
can be damaging to the unit’s circuitry.
Attach a standard load (i.e., a piezoelectric actuator with two lead wires for power and ground) to
the VF-150 OEM. Typically, the piezoelectric material manufacturer will designate the “live”,
“hot” or “positive” electrode with red lead wire and/or a visible mark on the piezo material to
distinguish this electrode from the ground electrode.
CAUTION: When the VF-150 OEM is powered, pins can have voltages up to 200 V
(depending on power supply used).
VF-150 OEM Mounting and Connection Diagram:
(top side of customer supplied board pictured)
Connections:
CN201 (20 pin connector) PN FCI 10106813-021112LF
1, 2
Analog Input
3, 4
Analog Ground
5, 6
Amplifier TX
7, 8
Amplifier RX
9, 10
DAC CS
11, 12
DAC MOSI
13, 14
DAC CLK
15 thru 18
Digital Ground
19, 20
5VDC 1A
*Logic inputs are 3.3 and 5 V tolerant.
*Outputs are 5 V logic level

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114 Southeast Parkway Ct.
Ste 160
Franklin, TN 37064
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CN203 (40 pin connector) PN FCI 10106813-041112LF
1 thru 6
Negative rail power supply
11 thru 18
Power Ground
23 thru 30
Amplifier Output
35 thru 40
Positive rail power supply
Circuitry Protection:
The VF-150 OEM circuitry incorporates over-current, over-temperature, and short-circuit
protection. There are two operating modes for the current limit protection circuitry:
1. Auto mode
a. In this mode the amplifier will monitor the output current and make decision
based on the current and time.
b. If the output current is above 150mA or below -150mA for more then 10msec the
amplifier will limit the output current to ±150mA until the output current is less
then 50mA for 30msec.
2. 150mA mode
a. This mode will configure the amplifier so that only a maximum of 150mA is
available at the output.
The over temperature protection will turn off the amplifier and disconnect from the power supply
when the temperature reaches 80C. The amplifier will be re-enabled when the temperature drops
to 70C. To enable the amplifier the temperature must be below 70C.
Short circuit protection is activated when the output is above 75mA for more then one second.
Under this condition the amplifier will be disconnected from the power supply for one second.
After one second the amplifier will be reconnected.
Recommended Environmental Conditions for Operation:
The VF-150 is designed to operate in non-hazardous environments. Any deviation from the
specified environment must be approved by DSM and may result in the voiding of any warranty.
Any deviation not approved by DSM will be grounds for voiding of any warranty.
•Environmental Temperature: 0-50C
•Percent Relative Humidity: 0-80% non condensing
•Operating Supply Voltage: 5VDC input @ 1A
•Maximum Difference Between Rail Voltages: 250 VDC
•Positive Rail:130VDC to 210 VDC
•Negative Rail:-15VDC to -110 VDC

Hardware Version V131028 6
205 Williamson Square
Franklin, TN 37064
Tel: [phone]
Fax: [phone]
114 Southeast Parkway Ct.
Ste 160
Franklin, TN 37064
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Fax: [phone]
Dimensions: