PA84

Operating Supply Voltage :
Output Current :
Packaging :
Number of Channels : 1
Input Offset Voltage : 3 mV
Shutdown : No
Maximum Operating Temperature : + 85 C
Mounting Style : Through Hole
Input Bias Current (Max) : 50 pA
Common Mode Rejection Ratio (Min) : 130 dB
Package / Case : TO-3
Slew Rate : 200 V/us


Features:

• HIGH SLEW RATE - 200V/s
• FAST SETTLING TIME - .1% in 1s (PA84S)
• FULLY PROTECTED INPUT - Up to ±150v
• LOW BIAS CURRENT, LOW NOISE - FET Input
• WIDE SUPPLY RANGE - ±15V to ±150V




Application

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




Specifications

SUPPLY VOLTAGE, +VS to VS	300V
OUTPUT CURRENT, within SOA	Internally Limited
POWER DISSIPATION, continuous @ TC = 252	17.5W
INPUT VOLTAGE, differential PA84/PA84A1	±300V
INPUT VOLTAGE, differential PA84S	±50V
INPUT VOLTAGE, common mode	±VS
TEMPERATURE, pin solder-10s max(solder)	300
TEMPERATURE, junction2	200
TEMPERATURE RANGE, storage	65 to 150
OPERATING TEMPERATURE RANGE, case	55 to 125

Description

The PA84 is a high voltage operational amplifier designed for output voltage swings up to ±145V with a dual supply or 290V with a single supply. Two versions are available. The new PA84S, fast settling amplifier can absorb differential input overvoltages up to ±50V while the established PA84 and PA84A can handle differential input overvoltages of up to ±300V. Both versions are protected against common mode transients and overvoltages up to 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 PA84 features an unprecedented supply range and excellent supply rejection. The output stage is biased-on for linear operation. External phase compensation allows for user flexibility in obtaining the maximum slew rate. Fixed current limits protect these amplifiers against shorts to common at supply voltages up to 150V. 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.

This hybrid PA84 integrated circuit utilizes a beryllia (BeO) substrate, thick film resistors, ceramic capacitors and semiconductor chips of PA84 to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires of PA84 provide reliable interconnections at all operating temperatures. The 8-pin TO-3 package of PA84 is hermetically sealed and electrically isolated. The use of compressible thermal isolation washers of PA84 and/or improper mounting torque will void the product warranty. Please see Application Note 1 "General Operating Considerations,"

The PA84A is the A grade version, the PA83S is the fast settling time version, the PA84M/883 is the certified military grade version.

Applications:

• High Voltage Instrumentation
• Electrostatic Transducers and Deflection
• Programmable Power Supplies up to 290V
• Analog Simulators

The PA84 is a high voltage operational amplifier designed for output voltage swings up to ±145V with a dual supply or 290V with a single supply. Two versions are available. The new PA84S, fast settling amplifier can absorb differential input overvoltages up to ±50V while the established PA84 and PA84A can handle differential input overvoltages of up to ±300V. Both versions are protected against common mode transients and overvoltages up to 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 PA84 features an unprecedented supply range and excellent supply rejection. The output stage is biasedon for linear operation. External phase compensation allows for user flexibility in obtaining the maximum slew rate. Fixed current limits protect these amplifiers against shorts to common at supply voltages up to 150V. 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.

This hybrid PA84 integrated circuit PA84 utilizes a beryllia (BeO) substrate, thick film resistors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires of PA84 provide reliable interconnections at all operating temperatures. The 8- pin TO-3 package of PA84 is hermetically sealed and electrically isolated. The use of compressible thermal isolation washers of PA84 and/or improper mounting torque will void the product warranty. Please see "General Operating Considerations".

Parameters:

Technical/Catalog Information	PA84
Vendor	Cirrus Logic Inc
Category	Integrated Circuits (ICs)
Packaging	Tube
Amplifier Type	Power
Number of Circuits	1 - Single
Package / Case	TO-3-8
Slew Rate	200 V/s
Gain Bandwidth Product	75MHz
Current - Supply	5.5mA
Current - Output / Channel	40mA
Voltage - Supply, Single/Dual (±)	30 V ~ 300 V, ±15 V ~ 150 V
Output Type	-
-3db Bandwidth	-
Current - Input Bias	5pA
Operating Temperature	-25°C ~ 85°C
Voltage - Input Offset	1500V
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	PA84 PA84 598 1324 ND 5981324ND 598-1324