23935

• LOW BIAS CURRENT, LOW NOISE - FET Input
• FULLY PROTECTED INPUT - Up to ±150V
• WIDE SUPPLY RANGE - ±15V to ±150V

• HIGH VOLTAGE INSTRUMENTATION
• ELECTROSTATIC TRANSDUCERS & DEFLECTION
• PROGRAMMABLE POWER SUPPLIES UP TO 290V
• ANALOG SIMULATORS

SUPPLY VOLTAGE, +V_S to V_S .............................300V
OUTPUT CURRENT, within SOA .........Internally Limited
POWER DISSIPATION, internal at T_C = 251 ....17.5W
INPUT VOLTAGE, differential ..............................±300V
INPUT VOLTAGE, common mode ........................±300V
TEMPERATURE, pin solder - 10s max (solder) ......300
TEMPERATURE, junction .......................................150
TEMPERATURE RANGE, storage ..............65 to +150
OPERATING TEMPERATURE RANGE, case 55 to +125

The PA83 is a high voltage operational amplifier designed
for output voltage swings up to ±145V with a dual (±) supply or
290V with a single supply. The PA83's input stage is protected against
transient and steady state overvoltages up to and including the
supply rails. High accuracy is achieved with a cascode input circuit configuration. All internal biasing is referenced to a zener diode fed by a FET constant current source. As a result, the PA83 features an unprecedented supply range and excellent supply rejection. The output stage is biased in the class A/B mode for linear operation. Internal phase compensation assures stability at all gain settings without need for external components. Fixed current limits protect these amplifiers against shorts to common at supply voltages up to 120V. For operation into inductive loads, two external flyback pulse protection diodes are recommended. However, a heatsink may be necessary to maintain the proper case temperature under normal operating conditions.

PA83 utilizes beryllia (BeO) substrates, thick (cermet) film resistors, ceramic capacitors and silicon semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures.

The 8-pin TO-3 package is hermetically sealed and electrically isolated. The use of compressible thermal isolation washers and/or improper mounting torque voids product warranty.

Please see Application Note 1 "General Operating Considerations".