Trek 623B User Manual
Trek Model 623B
High-Voltage Power Amplifier
The Model 623B is a DC-stable, high-voltage power amplifier
designed to provide precise control of bi-polar output voltages. It
features an all-solid-state design for high slew rate, low-noise
operation and a wide bandwidth of DC to greater than 10 kHz .
The four-quadrant, active output stage sinks or sources current
into reactive or resistive loads throughout the output voltage
range. This type of output is essential to achieve an accurate
output response and high slew rate demanded by a variety of
loads such as highly capacitive or reactive loads.
Key Specifications
Output Voltage Range:
! 0 to ±2 kV DC or peak AC
Output Current Range:
!
Slew Rate: Greater than V/
!
!
Large Signal Bandwidth (1% distortion): DC to greater than 10 kHz
!
DC Voltage Gain (Noninverting Configuration): 1000 V/V (V )
DC Voltage Gain (Inverting Configuration) : -1000 V/V (V )
!
Differential Configuration: Function of the difference between two input signals.
!
0 to ±40 mA DC or peak AC
300 µs
A
B
Represented by the equation:
V = 1000 (V - V )
out A B
Typical Applications Include
! Electrostatic beam deflection
!
Electrooptic modulation
!
Electrophoresis research
!
Piezoelectric poling and driving
Features and Benefits
! Four-quadrant output for driving capacitive loads
Closed loop system for high accuracy
!
Short-circuit protected for equipment protection
!
!
All solid-state design for maintenance free operation
DC-stable for programmable supply applications
!
Low output noise for ultra-accurate outputs
!
NIST-traceable Certificate of Calibration provided with each unit
!
compliant
!
TREK, INC. • 190 Walnut Street • Lockport, NY 14094 • USA • 800-FOR TREK
(fax) • www.trekinc.com • sales@trekinc.com 716-438-7555 • 716-201-1804
Features
High Voltage On/Off
Local
Individual push-button switches
Remote
TTL high turns OFF the high voltage; TTL low
turns on the high voltage
Dynamics
Adjustments
Graduated 1-turn potentiometer used to
optimize the AC response for various load
parameters
Current Limit/Trip
Switch selectable for limit or trip. Graduated 1turn potentiometer adjusts from 0 to 40 mA
Out of Regulation
LED illuminates and BNC provides a TTL low
when Model 623B fails to produce HV output
such as during a current limit
Trip Status
LED illuminates and BNC provides a TTL low
when HV is disabled due to the output current
exceeding the current trip level, a high voltage
fault is detected or the top cover is removed
Mechanical
Dimensions
134 mm H x 432 mm W x 439 mm D
(5.25” H x 17” W x 17.25” D)
Weight
13.2 kg (29 lb)
HV Connector
Alden High Voltage Connector
BNC Connectors
Voltage monitor, current monitor, remote HV
ON/OFF, out of regulation, fault/trip status
Amplifier Input
3-pin connector may be configured for inverting, noninverting or differential amplification
Operating Conditions
Temperature
0°C to 40°C (32°F to 104°F)
Relative Humidity
To 85%, noncondensing
Altitude
To 2000 meters (6561.68 ft.)
Electrical
Line Voltage
Factory Set for one of two ranges:
90 to 127 V AC or 180 to 250 V AC,
either at 48 to 63 Hz
Power Consumption
220 VA, maximum
Supplied Accessories
Operator’s Manual
PN: 23185
HV Output Cable
PN: 43406
Input Cable
Connector Assembly
PN: 43418
Line Cord (90 V to
127 V operation)
PN: N5011
Line Cord 230 V AC
Contact factory
Optional Accessories
HV Output Cable
PN: 43406
19” Rack Mount Kit
Model 607RA (with EIA hole spacing)
Model 607RAJ (with JIS hole spacing)
Model 623B Specifications
Performance
Output Voltage
0 to ±2 kV DC or peak AC
Output Current
0 to ±40 mA DC or peak AC
Input Voltage Range
0 to ±2 V DC or peak AC
Input Impedance
Noninverting
25 kW, nominal
Inverting
50 kW, nominal
Differential
50 kW, nominal
DC Voltage Gain
1000 V/V
Noninverting (V )
A
Configuration
1000 V/V
Inverting (V )
B
Configuration
-1000 V/V
Differential
Configuration
Function of the difference between two input
signals. Represented by the equation:
V = 1000 (V - V )
OUT A B
DC Voltage Gain
Accuracy
Better than 0.1% of full scale
DC Offset Voltage
Less than ±1 V
Output Noise
Less than 80 mV rms*
Slew Rate
(10% to 90%, typical)
Greater than 300 V/µs
Settling Time (to 1%)
Less than 150 µs for a 2 kV step
Large Signal
Bandwidth (1%
distortion)
DC to greater 10 kHz
Small Signal
Bandwidth (-3dB)
DC to greater than 40 kHz
Stability
Drift with Time
Less than 100 ppm/hr, noncumulative
Drift with Temp
Less than 200 ppm/°C
Voltage Monitor
Ratio
1/1000th of the high-voltage output signal
DC Accuracy
Better than 0.1% of full scale
DC Offset Voltage
Less than ±2.5 mV
Output Noise
Less than 2 mV rms*
Output Impedance
0.1 W
Current Monitor
Ratio
0.25 V/mA
DC Accuracy
Better than 5% of full scale
Offset Voltage
Less than ±5 mV
Output Noise
Less than 10 mV*
Small Signal
Bandwidth (-3 dB)
DC to greater than 10 kHz
Output Impedance
47 W
*Measured using the true rms feature of the HP Model 34401A digital multimeter
Copyright ã 2012 TREK, INC. All specifications are subject to change. 1231/DEC
Measurement and Power Solutions
www.trekinc.com
TM
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