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BA4825

BA4850

Provide stable output that easily drives a wide variety of devices BA Series are power amplifiers that handle DC to 50 MHz (max.) signals and output broadband, high speed, and high voltage (300 Vp-p max) bipolar (both positive and negative polarities) outputs. While ordinary DC power supplies only supply one-way currents, the BA Series amplifiers supply (source) and absorb (sink) currents, and handle positive and negative voltages as well, because they operate across all four quadrants.

	BA4825	BA4850
Broadband	DC to 2MHz	DC to 50MHz
High-power output voltage	100Vrms (300Vp-p), 0.5Arms	±20V, ±1A
High slew rate	500V/μs	6000V/μs
Low output impedance	0.5Ω+1.5μH or less (typ.)	3.3Ω+0.01μH or less (typ.)
Bipolar output	Four-quadrant operation that enables positive and negative voltage and current to be supplied (source) and absorbed (sink).
Multiple functions	Output polarity switching, output range shift, output monitoring, external output on/off control, DC bias addition, and DC offset adjustment	Output polarity switching, external output on/off control, and DC offset adjustment

As for high speed bipolar amplifier, we have prodcut lineup of HSA series (total six models) with different frequency range, output voltage and output current besides BA series. We would like you consider HSA series together with BA series to select appropriate model..

Features

	Available for capacitive and inductive loads If a load containing a capacitor or coil is driven with alternating current, the current generally flows back from the load. In this case, an ordinary power supply or amplifier may not be able to drive the load. BA series amplifier also operates (i.e., outputs the current) with a capacitive or inductive load such as a piezoelectric element or solenoid. This is because it operates also with a sink, where the voltage and current directions are reverse.
	Broadband, high speed, and high-voltage BA4850 faithfully reproduces pulse signals with quick rise and complex waveform signals as well, because the frequency band is DC to 50 MHz and the slew rate is 6,000 V/µ s. BA4825 drives current from a large piezoelectric element or display device, because the band is DC to 2 MHz and the maximum high-voltage output is 300 Vp-p. Because both can amplify DC, they can be input waveforms containing an offset or those that are asymmetric in the positive area and negative area.
	Low output impedance BA series keep a low output impedance throughout the overall range (0.5Ω + 1.5 MHz or less typ. for BA4825). With the voltage drop (raised due to load connection) suppressed to the minimum, the power of the equipment is maximized.
	Multiple functions
	Range shifting function*1 for changing output range.*1
	DC bias addition function*1 for adding direct current (bias) to the output.
	DC offset adjustment function for setting DC offset in output to 0 (zero).
	Equipped with output voltage monitor terminal (BNC, monitor ratio 1/100)*1 and monitor meter (output voltage/current switching display)*1.
	Output on/off can be switched from the panel or externally controlled.
	Output polarity switching (INVT) for setting the device to either an in-phase or reversed-phase amplifier. Use of reversed-phase output enables BTL*2 connection, which doubles the output voltage and power, using two BA Series amplifiers.
	Two systems, A and B, for input. Switching and addition of the input by pressing a single key*1.
	Input impedance switcheable between 50Ω and 10kΩ*1
	The settings at power-on can be set using the dip switches on the rear panel.
	The power input is available for worldwide applications (AC100 to 230 V).
	*1 : BA4825 function *2 : Balanced Transformerless

Applications

	Driving and evaluation of piezoelectric elements
	High voltage and high speed are required when a piezoelectric element used for a piezoelectric inverter or piezoelectric actuator is to be driven and evaluated. In addition to high-voltage output, BA Series amplifiers keep extremely small output impedance. Therefore, they can offer superior step response against piezoelectric with large capacitance piezoelectric element.

	Test and evaluation of display devices
	Flat display panels such as FEDs and LCDs require high voltage for driving, and quick rise for evaluation of their response characteristics. With their high-voltage output and high slew rate, BA series amplifiers enable accurate drive tests and evaluations.

	Power amplifier for signal or pulse generators
	During evaluation process of power devices, the performance is evaluated with a broadband, high voltage, and large current. With their broadband, high speed, and high voltage output, BA series amplifiers evaluate and test devices, using various waveforms, pulse patterns, and arbitrary waveforms.

	Measurement of magnetizing characteristics (B-H curves)
	BA series can be used for magnetization measurement such as ferrite and or amorphous materials. Since the BA Series features the high frequency of 50 MHz required for measuring B-H curves, as well as high voltage output and high stability against inductive loads, you can reproduce stable measurement.

	Driving of elastic surface wave ultrasonic motors and comb tooth-shaped electrodes in the field of nanotechnology and MEMS
	High-frequency ripple tests of capacitors
	Development of ink jet application technology
	Characteristics tests for semiconductors such as diodes and SCRs
	Characteristic test for the devices such as relays and switches
	Research and development of IC cards
	Driving use of devices and materials and other R&D use in the leading edge technology field

Specifications

	BA4825	BA4850
Frequency band	DC to 2MHz	DC to 50MHz

	BA4825		BA4850
Maximum output voltage	±150V range (rated resistance load 200Ω)		±20V (rated resistance load 50Ω) : DC to 20MHz ±14.2V (rated resistance load 50Ω) : 20MHz to 50MHz
	100Vrm or greater	40Hz to 500kHz
	70Vrms or greater	500kHz to 1MHz
	40Vrms or greater	1MHz to 2MHz
	±150V range (rated resistance load 450Ω)
	±150V (300Vp-p)	DC to 500kHz
	±100V (200Vp-p)	500kHz to 1MHz
	±56V (112Vp-p)	1MHz to 2MHz
	+250V range (rated resistance load 1,250Ω)
	-50V to +250V	DC to 500kHz
	+40V to +240V	500kHz to 1MHz
	+80V to +200V	1MHz to 2MHz
	-250V range (rated resistance load 1,250Ω)
	-250V to +50V	DC to 500kHz
	-240V to -40V	500kHz to 1MHz
	-200v to -80V	1MHz to 2MHz
Rated output current	0.5Arms (±150V range, rated resistance load 200Ω)		±1A, DC
Output power	Constant voltage (CV)
Output polarity	In-phase or reversed phase (toggled with the panel switch)
Characteristics of small amplitude frequency	DC to 100kHz, ±0.5 dB 100kHz to 2MHz, +1, -3 dB Conditions: Output amplitude 20 Vrms, reference 1 kHz		DC to 100kHz, ±0.5dB 10 kHz to 5 MHz, +1, -3dB Conditions: Output amplitude ±4V, reference 1kHz
Gain setting	Fixed: ×1, ×10, ×20, ×50 Variable: ×1 (CAL) to ×3, consecutive The set gain equals to (Fixed × Variable).		Fixed: ×1, ×2, ×5, „×10 Variable: ×1 (CAL) to ×3, consecutive The set gain equals to (Fixed × Variable).
Slew rate	500V/μs		6000V/μs
Output DC offset	Adjustment range: ±0.5V or more (input terminal short circuit)
Output DC bias	±200V or more Allows turning on/off by the front panel switch.		-
Output impedance	0.5Ω + 1.5μH or less (typ.)		3.3Ω + 0.01μH or less (typ.)
Output terminal	BNC connector (front panel), Lo side grounded to the cabinet
Monitor output	1/100 of output voltage, in-phase		-
Monitor meter	Displays output voltage or current (toggled with the switch)		-
Output on/off	Front panel switch or external control input

Input

	BA4825	BA4850
Maximum input voltage	±10V
Number of terminals	2 (A input: Front panel, B input: Rear panel) (Input type may be A input, B input, or both A input and B input.)	1 (Front Panel)
Input terminals	BNC connector, Lo side grounded to the cabinet
Input impedance	5Ω and 10kΩ, switchable	50Ω

Miscellaneous

	BA4825	BA4850
Protection function	Output overcurrent, output overvoltage, power section failure, abnormal internal temperature
External control input/output	2 (A input: Front panel, B input: Rear panel) (Input type may be A input, B input, or both A input and B input.)
Settings at power-on	Settings power-on made by dip switches on the rear panel (10 settings for BA4825, or 4 settings for BA4850)
Power input	AC100V to 230V ±10% (at 250V or less), 50Hz/60Hz ±2Hz
Power consumption	350VA or less	200VA or less
Operating temperature and humidity	0 to +40°C, 5 to 85%RH (Absolute humidity 1 to 25g/m3, no condensation)
Dimensions (mm)	258(W)×132.5(H)×390(D) (not including protrusions)
Weight	Approx.7kg

BA4825 output voltage and current range

For AC	For DC

related products

Multifunction Synthesizer — WAVE FACTORY As a signal source of bipolar power amplifiers

Frequency Response Analyzerr — FRA5087/FRA5097 For high-accuracy frequency characteristic measurements, including resonance characteristic measurement of piezoelectric elements.