Cedrat Technologies CAu10 Instruction Manual

CEDRAT TECHNOLOGIES URL: http://www.cedrat.com
15 Chemin de Malacher - Inovallée Email: [email protected]
F-38246 MEYLAN Cedex Phone: [phone]
FRANCE Fax: [phone]
CAu10 - MINIATURE LINEAR AMPLIFIER FOR
PIEZOELECTRIC ACTUATORS
PRODUCT AND WARRANTY INFORMATION
Version : .2.
Date: 1/04/09

CAu10 Product and Warranty information
CEDRAT TECHNOLOGIES 2/19 Version 3.2.3 - 31/04/09
CAUTION: READ BEFORE OPENING
For safety purposes these instructions must be read before use of this product.
This driver board is dedicated to multilayers piezoelectric actuators.
Only qualified personnel should work on or around this equipment and only after
becoming thoroughly familiar with all warnings, safety notices, and procedures
contained herein.
The successful and safe operation of this equipment is dependent on proper
handling, installation and operation.
A "qualified person" is one who is familiar with the installation, construction and
operation of the equipment and the hazards involved. In addition, he/she has the
following qualifications :
• is trained and authorized to energize, de-energize, clean, and ground
equipment in accordance with established practices,
• is trained in the proper care and use of protective equipment in accordance
with established safety practices.

CAu10 Product and Warranty information
CEDRAT TECHNOLOGIES 3/19 Version 3.2.3 - 31/04/09
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
1. SYNOPTIC ....................................................................4
2. GENERAL DESCRIPTION....................................................6
2.1. Introduction.......................................................................................................6
2.2. Main connections...............................................................................................7
2.3. Analogue connections.......................................................................................7
2.4. Protocol for SPI transfer ..............................................................................7
2.5. Interpolation filters ........................................................................................9
. OPERATING INSTRUCTION FOR THE MINIATURE CAU10
DRIVE ELECTRONIC....................................................... 10
3.1. General instructions....................................................................................... 10
3.2. Voltage control and current limitation ...................................................... 10
3.3. Using the push–pull mode.............................................................................. 10
4. TROUBLE SHOOTING ..................................................... 12
5. WARRANTY CONDITIONS AND EXCEPTIONS ........................ 1
6. INSPECTION UPON RECEIPT ............................................ 1
7. AFTER-SALES SERVICE .................................................. 1
ANNEX 1 : CAU10 TECHNICAL DATASHEET................................ 15
ANNEX 2 : EFFECT OF THE CURRENT LIMITATION ...................... 16
Ratings of the CAu10 board on piezo actuator series....................................... 17
ANNEX : UNDERSTANDING THE FACTORY VERIFICATION
SHEET ...................................................................... 18
ANNEX 4 : TROUBLE SHOOTING FORM..................................... 19

CAu10 Product and Warranty information
CEDRAT TECHNOLOGIES 4/19 Version 3.2.3 - 31/04/09
1.
1.1.
1. SYNOPTIC
SYNOPTICSYNOPTIC
SYNOPTIC
The miniature drive electronics CAu10 is a double-channel linear amplifier for
piezoelectric actuators with the following dimensions:
27 * 25 mm.
The following scheme gives the top view of the electronic board.
Figure 1 – Top view of the CAu10 drive electronic

CAu10 Product and Warranty information
CEDRAT TECHNOLOGIES 5/19 Version 3.2.3 - 31/04/09
The CAu10 board has 3 Hirose type connectors:
R EFERENCE D ESIGNATION
1
st
connector
P1 - Piezoelectric load : DF13-5P 1.25DS Hirose connector
GND Piezo ground
Out 1 Channel 1 output voltage
Out 2 Channel 2 output voltage
+150V DC 150 V (for push pull operational mode)
Aux Not used
2
nd
connector P2 – SPI link – analog order : DF13-8P 1.25DS connector
\Sync SPI command. Provide synchronisation line for SPI protocol
Din Data Line to command the digital to analogue converter: 16 bits word
Sclk SPI command. Clock signal for SPI protocol
\Ldac SPI command. Provide synchronisation signal for the 2 channels to convert
synchronously the 12 bits words in analogue signals
3V3 DC Supply : 3.3 V
InAna1 Analogue order – channel 1 (comprised between 0 and 3.3 V)
InAna2 Analogue order – channel 2 (comprised between 0 and 3.3 V)
Gnd Ground
rd
connector P3 – DC Supply : DF13-2P 1.25DS connector
Battery Battery supply (comprised between 3.3 – 15 V)
GND Ground
The corresponding female connectors are:
-Fiche DF13-5S 1.25C
-DF13-2630 SCF
WARNING
A special care in the use of the connectors should be taken in plugging and
unplugging them: you have to pull onto the connector and not the cable.
It is strictly forbidden to connect the 2 electrical output channels in
parallel.

CAu10 Product and Warranty information
CEDRAT TECHNOLOGIES 6/19 Version 3.2.3 - 31/04/09
2.
2.2.
2. GENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
2.1.
2.1.2.1.
2.1. Introduction
IntroductionIntroduction
Introduction
The miniature drive electronic CAu10 is dedicated to the supply of piezoelectric
actuators based on multi-layers piezoelectric ceramics such as APA or PPA from
CEDRAT TECHNOLOGIES or benders. The CAu10 consists in a drive electronic
with a maximal power given in the attached technical data sheet including
(Figure 2):
•A DC/DC converter based on a capacitive multiplier
•Two linear amplifiers dedicated to capacitive load allowing excitation of
piezoelectric actuators between 5 and 150 V
•A SPI link able to read a digital command.
The miniature CAu10 driver amplifier can also operate in push-pull mode to drive
XY stages or DTT mechanisms from CEDRAT TECHNOLOGIES.
DC/DC
converter
Linear amplifier #1
Linear amplifier #2
Battery
SPI Bus
3v3
Converter power
supply
+150V
Push pull connection
Out1
Out2
Interpolation
filters
Optional
Analogue input
Figure 2 – Synoptic of the CAµ10 driver

CAu10 Product and Warranty information
CEDRAT TECHNOLOGIES 7/19 Version 3.2.3 - 31/04/09
2.2.
2.2.2.2.
2.2. Main connection
Main connectionMain connection
Main connection
Connect the CAµ10 driver with the following AWG30 cable on the different
soldering pads.
1. Battery & its return line : To supply the high voltage amplifier
2. SPI bus or optional analogue signals: \SYNC DIN and SCLK are the main
signals. However if synchronisation between the channels is required
connect \LDAC to synchronise the output DAC with \LDAC signal.
3. 3v3 signal & its return line: To supply the DA converter
4. OUT1 OUT2 +150V and their return line GND: Twist the cables to suppress
EMI-RFI perturbations.
2.3.
2.3.2.3.
2.3. Analogue connection
Analogue connectionAnalogue connection
Analogue connection
In the case where the order is an analogue signal its possible to send directly
this signal (if its range is in the range of the input driver- See datasheet) on the
input of the high power amplifier. The following instruction must be apply to
avoid damage: the input tension must be lower than 3.3V.
2.4.
2.4.2.4.
2.4. Protocol for SPI tran fer
Protocol for SPI tran ferProtocol for SPI tran fer
Protocol for SPI tran fer
The protocol to control the Digital to Analogue converter is based on the SPI
protocol. A same circuit provides the 2 output analogue signals from only one
serial data transfer.
Figure 4: SPI timing diagram

CAu10 Product and Warranty information
CEDRAT TECHNOLOGIES 8/19 Version 3.2.3 - 31/04/09
Mnemonic Description
\LDAC
Active Low control Input. This pin transfers the contents of the input
registers to their respective DAC registers. Pulsing \
LDAC low allows
either or both DAC registers to be updated if the in
put register have
new data. This allows simultaneous updating of booth DAC outputs.
\SYNC
Active low control input. This is the frame synchronisation signal for the
input data. When \
SYNC goes low it powers on the SCLK and DIN
buffer and enables the inpu
t shifts registers. Data is transferred in on
the falling edge of the following 16 clocks. If \
SYNC is taken high
before the 16
th
falling edge the rising edge of \
SYNC acts as an
interrupt and the write sequence is ignored by the device.
SCLK Serial Cloc
k input. Data is clocked into the input shift register on the
falling edge of the serial clock input. Data can be transferred at rates up
to 30MHz. The SCLK input buffer is powered down after each write
cycle
DIN Serial Data In. The device has a 16-bit in
put shift register. Data is
clocked into the register on the falling edge of the serial clock input. The
DIN input buffer is powered down after each cycle.
Figure 5 Pin function description
The input shift register is 16 bits wide. Data is loaded into the device as a 16-
bit word under the control of a serial clock input SCLK. The timing diagram for
this operation is shown in Figure 4. The 16-bit word consists of four control bits
followed by 12 bits of DAC data depending on the device type. The first bit
loaded is the MSB (Bit 15) which determines whether the data is for DAC A or
DAC B. Bit 14 determines if the reference input is buffered or unbuffered. Bit
13 and Bit 12 control the operating mode of the DAC.
Figure 6 Input shift register content

CAu10 Product and Warranty information
CEDRAT TECHNOLOGIES 9/19 Version 3.2.3 - 31/04/09
The low power supply 3V3 fixes the reference voltage of the converter. In
other word With 12 bits corresponds the low power supply 3V3. In the same
time “0” corresponds to 0V and “1” corresponds to the low power supply (i.e 3v3
for 3V3 low power supply).
2.5.
2.5.2.5.
2.5. Interpolation filter
Interpolation filterInterpolation filter
Interpolation filter
As the piezomechanism is characterised by a strong resonant frequency the
generated step from the DA converter output can destroyed the mechanism. A
1
st
order low pass filter with a cut-off frequency of 1.5 kHz is present to
minimise this effect if the resonant frequency is below the resonant frequency
of the mechanism.

CAu10 Product and Warranty information
CEDRAT TECHNOLOGIES 10/19 Version 3.2.3 - 31/04/09
3.
3.3.
3. OPERATING INSTRUCTIO
OPERATING INSTRUCTIOOPERATING INSTRUCTIO
OPERATING INSTRUCTION FOR THE
N FOR THE N FOR THE
N FOR THE MINIATURE CAU10
MINIATURE CAU10 MINIATURE CAU10
MINIATURE CAU10
DRIVE ELECTRONIC
DRIVE ELECTRONICDRIVE ELECTRONIC
DRIVE ELECTRONIC
3.1.
3.1.3.1.
3.1. General in truction
General in tructionGeneral in truction
General in truction
The linear amplifier allows applying to the actuator a signal comparable to the
order's one with a gain of 45 (see Figure 3).
Input signal order
45
0
Piezo Actuator
Voltage amplifier
offset
+
Command
Figure 3 - Principle of linear voltage amplifier
3.2.
3.2.3.2.
3.2. Voltage control and current limitation
Voltage control and current limitationVoltage control and current limitation
Voltage control and current limitation
If the order signal is below 0 V or above 3.3 V a protective diode and the power
amplifier saturation will clamp the signal so that the voltage applied to the
actuator stays roughly between 5 V and 150 V.
There is some limitation to the constant gain of the amplifier. Indeed when the
variation speed of the input signal (order) increases the current limitation of
the amplifier limits the slew rate of the output voltage. This current limitation
is set to 5 mA for the sourcing current and around 10 mA for the sinking
current.
3.3.
3.3.3.3.
3.3. U ing the pu h
U ing the pu hU ing the pu h
U ing the pu h–
––
–pull mode
pull modepull mode
pull mode
For some piezoelectric devices such as the piezoelectric tilts or XY stages it is
necessary to supply two actuators simultaneously. A zero positioning is achieved
with an electrical centring. Such a configuration could easily be achieved by
using one amplifier according to the figure shown below.