Evaluation Pack EP120S
by Cedrat Technologies
PRODUCT INFORMATIONCEDRAT TECHNOLOGIES
59, Chemin du Vieux Chêne - InovalléeF-38246 MEYLAN Cedex
FRANCE

URL:/www.cedrat-technologies.com
Email: actuator@cedrat-tec.com
Phone: +33.(0)4.56.58.04.00
Fax: +33.(0)4.56.58.04.01

CAUTION: READ BEFORE OPENING
For safety purposes these instructions must be read before use of thisproduct.
Piezoelectric products are not warranted against mechanical damage
resulting from improper use, wherein excessive forces or voltages that areoutside specified ranges are applied.
High voltage is present in this product.
Only qualified personnel should work on or around this equipment and only
after becoming thoroughly familiar with all warnings, safety notices, andprocedures 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 groundequipment in accordance with established practices, is trained in the proper care and use of protective equipment inaccordance with established safety practices.

CEDRAT TECHNOLOGIES
59, Chemin du Vieux Chêne - InovalléeF-38246 MEYLAN Cedex
FRANCE

URL:/www.cedrat-technologies.com
Email: actuator@cedrat-tec.com
Phone: +33.(0)4.56.58.04.00
Fax: +33.(0)4.56.58.04.01

1.

GENERAL

Piezoelectric Actuators from CEDRAT TECHNOLOGIES SA consists in a wide range ofactuators, divided in three categories : Multilayer actuators, that are not mechanically prestressed,
 Parallel prestressed actuators, that are mechanically prestressed multilayer
actuators and offer mechanical interfaces,
 Amplified piezo actuators, that use an elastic amplifier to both prestress themultilayer actuator and amplify the displacement.
Piezoelectric Actuators must be handled carefully. Lifetime of Piezoelectric Multilayer
actuators is not limited by wear. They can perform millions of cycles without loss ofperformance provided they are operated under suitable conditions.
The lifetime of a Piezoelectric Multilayer Actuators is a function of many combined
parameters ; the most influencing being the applied voltage, the temperature and thehumidity. For maximum lifetime, operating voltage should be minimized, especially when
they are used in static conditions.
Tests have shown that the lifetime is reduced significantly, if the actuator ismaintained continuously at the maximal operating voltage. For instance, a Piezoelectric
Multilayer Actuator can be definitively damaged, if submitted to the maximal operating
voltage (e.g. : high electrical field up to 1.5 kV/mm) during more than one hour.
A high self heating of the piezo ceramic may occur during a long use in dynamic (highfrequency) operation. This can lead to depolarization or electrical breakdown of thepiezo ceramic.
When driving the piezo actuator, it is important not to create over voltages throughimproper drivers or parasitic inductances.
The mechanical installation or the induced moments under operation by the mechanism
are the main sources of failure.

CEDRAT TECHNOLOGIES
59, Chemin du Vieux Chêne - InovalléeF-38246 MEYLAN Cedex
FRANCE

URL:/www.cedrat-technologies.com
Email: actuator@cedrat-tec.com
Phone: +33.(0)4.56.58.04.00
Fax: +33.(0)4.56.58.04.01

2.

DESCRIPTION OF THE EVALUATION PACKThe evaluation pack is made of different sub-systems:
An amplified piezoelectric actuatorAPA120S (140µm, 39N)

A linear micro amplifier Caµ10: converts a voltage from [0; 3.3V] to [5; 150V]

CEDRAT TECHNOLOGIES
59, Chemin du Vieux Chêne - InovalléeF-38246 MEYLAN Cedex
FRANCE

URL:/www.cedrat-technologies.com
Email: actuator@cedrat-tec.com
Phone: +33.(0)4.56.58.04.00
Fax: +33.(0)4.56.58.04.01

Cabling:o Analog Input cable and connectors
o SPI Input cable and connectors
o Battery Cable and connectors
o 5V-150V Output cable and connectors

CEDRAT TECHNOLOGIES
59, Chemin du Vieux Chêne - InovalléeF-38246 MEYLAN Cedex
FRANCE

URL:/www.cedrat-technologies.com
Email: actuator@cedrat-tec.com
Phone: +33.(0)4.56.58.04.00
Fax: +33.(0)4.56.58.04.01

Synoptic of the EP120S
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 amaximal 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 ofpiezoelectric actuators between 5 and 150 V. In the evaluation pack, only 1 cable for 1channel is delivered. For using 2 channels, please ask for the optional cabling.
· A SPI link, able to read a digital command.
The miniature CAu10 driver amplifier can also operate in push-pull mode to drive XYstages or DTT mechanisms from CEDRAT TECHNOLOGIES. Please ask for the optional
cabling.

CEDRAT TECHNOLOGIES
59, Chemin du Vieux Chêne - InovalléeF-38246 MEYLAN Cedex
FRANCE

URL:/www.cedrat-technologies.com
Email: actuator@cedrat-tec.com
Phone: +33.(0)4.56.58.04.00
Fax: +33.(0)4.56.58.04.01

Synoptic of the Caµ10
The Datasheet of the Caµ10 can be found below:

CEDRAT TECHNOLOGIES
59, Chemin du Vieux Chêne - InovalléeF-38246 MEYLAN Cedex
FRANCE

URL:/www.cedrat-technologies.com
Email: actuator@cedrat-tec.com
Phone: +33.(0)4.56.58.04.00
Fax: +33.(0)4.56.58.04.01

2.1 Main connections
Connect the CAµ10 driver with the following AWG30 cable on the different solderingpads:
 Battery & its return line (Main votage) : To supply the high voltage amplifier SPI bus or optional analogue signals: \sync, din and sclk are the main signals.
however, if synchronization between the channels is required,connect \ldac tosynchronise the output dac with \ldac signal.
 3v3 signal & its return line ( Control Input Voltage): to supply the da converter out1 (output Voltage)
2.2 Analogue connections
In the case where the order is an analogue signal, its possible to send directly thissignal (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: theinput tension must be lower than 3.3V.
2.4. Protocol for SPI transfer
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.
See Caµ10 instruction manual for more information.
CEDRAT TECHNOLOGIES
59, Chemin du Vieux Chêne - InovalléeF-38246 MEYLAN Cedex
FRANCE

URL:/www.cedrat-technologies.com
Email: actuator@cedrat-tec.com
Phone: +33.(0)4.56.58.04.00
Fax: +33.(0)4.56.58.04.01