■ Stable output under various load conditions
▶ Four-quadrant operation
The operation range of the HSA42011 is four quadrants as shown in the figure below. Current sources and sinks regardless of positive or negative output voltage.
▶ Stable output with both capacitive and inductive loads
When an AC voltage is applied to a load including capacitors and coils, current returns from the load. In this case, a typical AC power supply or amplifier may not be able to drive the load.
The HSA42011 operates in the sink state in which the directions of voltage and current are opposite due to the 4-quadrant output function. Therefore, not only a capacitive load such as a piezoelectric element but also an inductive load such as a solenoid can both be driven stably.
▶ Fast response, wide frequency bandwidth from DC to 1MHz
High speed and high slew rate reproduce transient and repetitive operations with good step response. HSA42011 outputs AC and DC. Therefore, it is possible to output positive/negative asymmetric signals or signals in which AC is superimposed on DC.
▶ Low output impedance
Due to the output impedance of the power supply, the rise time of a capacitive or inductive load is delayed. The HSA42011 maintains a low output impedance over the entire frequency band, suppresses voltage drop due to load, and operates at high speed.
■Convenient functions for various purposes
▶ Gain setting
Set seamlessly by combining selectable fixed gain ×1,×10,×20,×50 and variable gain x1 to x3 ( fine adjustment potentiometer)
With a gain ×1 setting, it is used as a buffer amplifier that outputs at the same voltage as the external signal generator setting.
▶ Output polarity switching
With the [INVT] switch on front panel, an amplification can be selected which the input and output phases are in the same or opposite polarity.
BTL connection by two HSA42011 with output polarity set to opposite, the output voltage and power are doubled.
∗BTL : Balanced Transformer Less
▶ Output DC offset voltage adjustment
Adjust the output DC offset voltage to zero volts.
▶ Output DC bias voltage setting
Superimpose a DC bias voltage (up to ±75V) on the output voltage.（Setting by 10-turn potentiometer）
▶Protection function
Function to protect the load and HSA42011 from abnormal conditions. Overload, overvoltage, internal power supply error, internal temperature error, cooling fan error. When an error is detected, the output is turned off or the overload protection function is activated and the overload LED or error LED lights up. If the abnormal condition continues,all operations except power off are disabled.
▷ Others
● External control input/output
● Output voltage monitor
● Output on/off control
● Power-on status setting
Applications
Capacitor MLCC
The demand for multi-layer ceramic capacitors (MLCCs) has been rapidly increasing for mobile devices, automotive devices and industrial devices. And their capacity has become larger and larger while they're downsizing at the same time.
The capacitance of the MLCC depends on the frequency and voltage, and the characteristics are evaluated with an impedance analyzer that applies voltage while sweeping the frequency.
Motor Ultrasonic motor
In combination with a signal generator, the frequency, phase and amplitude can all be adjusted to test drive the motor.
The voltage output is stable over a wide frequency band, and the best drive conditions for the motor are verified.
Recently, an ultrasonic motor driven at 100kHz or higher is also developed.
● Applications
Autofocus of single-lens reflex camera, scanning electron microscope(SEM), semiconductor manufacturing equipment, Micromachine manufacturing equipment, etc.
Magnetic material Magnetic powder core, Ferrite core
For magnetic materials, new materials that do not contain rare earth elements are being actively developed.
Particularly, the magnetic powder core has good magnetic characteristics in the high frequency bandwidth of 1 kHz or higher. Magnetic powder cores are manufactured by processing and molding powder with characteristics such as excellent flexibility in shape and high manufacturing yield, and their applications to various types of components are being considered.
HSA42011 is used for B-H curve measurement to evaluate magnetic materials.
Piezoelectric element Actuator, Transformer
The HSA42011's low output impedance provides good step response even when driving a piezoelectric element with a large capacitance.
In conbination with an impedance analyzer to measure the resonance characteristics under actual driving conditions.
● Applications
Ultrasonic cleaner, injector, small speaker, ultrasonic diagnostic device, etc.
Smartphone
Verification of device malfunction due to external noise
Mobile devices such as smartphones may malfunction due to common mode noise or noise from the AC adapter.
The malfunction is verified by conducting a test that superimposes the AC voltage on the DC voltage.
The HSA42011 superimposes a broadband harmonic noise simulation signal up to 1MHz.
■ Example of test waveform
By setting the gain to x1, a low voltage set by the signal generator is applicable.
Dielectrophoresis(DEP)
Cell separation, Detection of microorganisms and viruses
Dielectrophoresis is a phenomenon in which dielectric particles migrate due to the particles and surrounding medium in a non-uniform electric field.They're usually applied to biomolecule measurement.
In many cases, a high AC voltage is applied at a frequency around 1MHz.
A bacterial detection method that combines dielectrophoresis and impedance measurement has been studied.
Combination with a signal generator for simulate various test conditions.
HSA42011 with function generator
HSA42011
