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VX4616 Dual Precision Power Amplifier
Features
4 High Precision Power Amplifier, ±50V, ±1,6A
4 Frequency bandwidth of 70KHz (150KHz optional)
4 Two isolated bipolar output channels
4 Outputs are operating as inverting precision
4
4
power amplifier
Outputs are operating as programmable
DC-source (voltage or current)
Outputs are programmable or adjustable via an
external analog source
Auto sensing
4
4 Pulse modulation with extremely low rise and
fall times
System interface RS232, USB or IEEE-488
4
4 Digital calibration via RS232, USB or IEEE-488
interface, no analog adjustments
VX4616 Dual Precision Power Amplifier
Product information:
The VX4616 is a two output high precision four quadrant power amplifier and can be used either as an inverting
amplifier or as a programmable DC-Source. Both power stages are separated galvanically.
The VX4616 is a 19", 3U rack mounting unit. The amplifier outputs can be remote controlled by analog input lines
or programmed via the RS232, USB or IEEE-488 interface. The remote control interface is optional and
galvanically separated.
The pulse modulation feature(4) provides pulses up to 50V, 200mA with extremely fast rise and fall times. The pulse
modulation control input is isolated.
Typically the VX4616 is used as a voltage source with current limiting. Together with option A & D the VX4616 can
be used as a voltage controlled current source for AC signals of up to 70KHz (150KHz option B). This function can
be used to generate a constant magnetic field in coils even with changing frequencies and inductance.
For safety reasons the VX4616 does support the following build-in security features required in automatic testing:
Ø
Auto-Sensing. If the sense line is not connected the output will be used as the sense point automatically.
Ø
Broken sense line. The output voltage will be reduced about the voltage drop across the load line
automatically.
Ø
Shorted sense line. The output voltage will be limited to 8V above programmed value.
The Amplitude-Error can be compensated with programmable Gain-Control-Sets. This reduces the Amplitude-Error
across the bandwidth essentially.
The instrument calibration is done digital and fully automatic. The calibration data are stored in on-board EEPROM.
Block diagram of amplifier circuit with connected load:
P uls mo dula ti on control
Op to Iso lation
Vo ltage contro l in put C H1
U- Gain
Cal-DAC
Output voltage versus output current:
U-Offse t
Cal-DAC
50
I-Offset
Cal-DAC
Cu rren t control in put CH1
40
Lo ad
I-G ain
Cal-DAC
Loa d
30
GND CH1
20
Channel 1
Co ntrol interface
10
-1,6
IEEE 488
or
USB
-1,0
-0,5
-30
U- Gain
Cal-DAC
-40
U-Offse t
Cal-DAC
-50
I-Offset
Cal-DAC
Curr ent co ntrol inp ut CH2
0,5
1,0
1,6
Io u t / A
-10
-20
Voltag e co ntrol inp ut CH2
Uo u t / V
Lo ad
I-G ain
Cal-DAC
G ND CH2
Channel 2
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All product data(1) are specified for an ambient temperature of 23°C ± 5°C, after 1 hour warm-up time
General
AC input voltage
AC input frequency
Operating temperature
Test voltage
Mode: Voltage-Control / Current-Limit
DC-Output voltage
Programming range
Resolution
Bandwidth
Distortion
Nominal gain
Gain error(2)
Gain drift
Offset voltage
Offset drift
Input impedance
Maximum sensing voltage
Pulse modulation(4)(5)
Rise time
Fall time
Minimum pulse width
Mode: Voltage-Control / Current-Limit
DC-Output current
Programming range
Nominal gain
Gain error(2)
Gain drift
Offset current
Input impedance
Mode: Voltage-Control / Current-Limit
AC-Output voltage(3)
1KHz, 3KHz
10KHz
30KHz
100KHz (Option B)
Specification
210VAC – 250VAC
47Hz … 63Hz
0 to 50°C
1970VDC
Comment
Output to chassis (PE)
Specification
-50V … +50 V
16 Bit, 1,6mV
70kHz (3dB)
4mVrms
+5
0,015%
20ppm / ºK
±5mV
200µV / ºK
10KΩ
±3V
Comment
Programmable current limit ±0,1A … ±1,6A
Extended bandwidth available (Option B)
At 1KHz and RLoad = 35Ω
Gain factor Uout/Uin
Offset voltage at Uout = 0
Input impedance of analog control input
Option C
Output voltage = 10V; Load = 200Ω
Output voltage = 10V; Load = 200Ω
<50ns
<100ns
1µs
Specification
-1,6A … +1,6A
0,16A / V
0,5%
100ppm / ºK
15mA
10KΩ
Comment
Positive and Negative limit set to same value
Gain factor Iout/Uin
Input impedance of analog control input
Amplitude-Error
full load
no load
0,13%
0,13%
0,13%
0,13%
0,3%
0,5%
0,7%
1,0%
nstruments
the test solutions provider
VX4616 Dual Precision Power Amplifier
Mode: Current-Control / Voltage-Limit
DC-Output current
Programming range
Resolution
Bandwidth
Nominal gain
Gain error(2)
Gain drift
Offset current
Input impedance
Mode: Current-Control / Voltage-Limit
DC-Output voltage
Programming range
Nominal gain
Gain error(2)
Gain drift
Offset current
Ordering information
Specification
-1,6A … +1,6A
16 Bit, 50µA
5KHz (3dB)
0,16A / V
0,2%
100ppm / ºK
15mA
10KΩ
Comment
Positive and Negative limit set to same value
Gain factor Iout/Uin
Input impedance of analog control input
Specification
-50V … +50V
5V / V
0,5%
100ppm / ºK
15mA
Option
Option A
Option B
Option C
Option D-1/2/3
Comment
Positive and Negative limit set to same value
Gain factor Uout/Uin
Comment
Current source, requires option D
Extended bandwidth (150KHz)
Pulse modulation (channel 1 only)
Remote control (RS232, USB, and IEEE-488)
Instrument Driver:
The instrument integration is simplified with VXIplug&play drivers. A soft front panel is included to control and verify
the instrument without writing a user program.
Quality:
All VX Instruments products are designed and built with ISO-9001 certified quality at VX Instruments facility in
Landshut, Germany. VX Instruments stands behind their products with a full two-year warranty.
(1)
(2)
(3)
(4)
(5)
Product specification and description in this document are subject to change without notice
6 months, 23ºC ±2ºC
Required correct gain control set
Positive output voltage only
Channel 1 only
VX Instruments GmbH
Bernsteinstr. 41A
84032 Landshut-Altdorf
Germany
Phone:
Fax:
Email:
Web:
+49 (0)871 931 555-0
+49 (0)871 931 555-55
sales@vxinstruments.com
www.vxinstruments.com
Copyright  2003 VX Instruments GmbH
Date: October, 2008