PA85A

Operating Supply Voltage :
Output Current :
Number of Channels : 1
Common Mode Rejection Ratio (Min) : 90 dB
Input Offset Voltage : 0.5 mV
Input Bias Current (Max) : 10 pA
Shutdown : No
Maximum Operating Temperature : + 85 C
Mounting Style : Through Hole
Packaging : Bulk
Slew Rate : 1000 V/us
Package / Case : TO-3


Features:

• HIGH VOLTAGE - 450V (±225V)
• HIGH SLEW RATE - 1000V/S
• HIGH OUTPUT CURRENT - 200mA


Application

• HIGH VOLTAGE INSTRUMENTATION
• PIEZO TRANSDUCER EXCITATION
• PROGRAMMABLE POWER SUPPLIES UP TO 430V
• ELECTROSTATIC TRANSDUCERS & DEFLECTION


Specifications

SUPPLY VOLTAGE, +VS to VS	450V
OUTPUT CURRENT, within SOA	200mA
POWER DISSIPATION, continuous @ TC = 252	30W
INPUT VOLTAGE, differential	±25V
INPUT VOLTAGE, common mode	±VS
TEMPERATURE, pin solder-10s max	300
TEMPERATURE, junction2	150
TEMPERATURE RANGE, storage	65 to +150
OPERATING TEMPERATURE RANGE, case	55 to +125

Description

The PA85 is a high voltage, high power bandwidth MOSFET operational amplifier designed for output currents up to 200mA.  Output voltages of PA85A can swing up to ±215V with a dual supply and up to +440 volts with a single supply. The safe operating area (SOA) PA85A has no second breakdown limitations and can be observed with all types of loads by choosing an appropriate current limiting resistor. High accuracy of PA85A is achieved with a cascode input circuit configuration. All internal biasing is referenced to a bootstrapped zener-MOSFET current source. As a result, the PA85 features an unprecedented supply range and excellent supply rejection. The MOSFET output stage is biased on for linear operation. External compensation provides user flexibility.

This hybrid circuit utilizes thick film (cermet) resistors PA85A, ceramic capacitors and silicon semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded aluminum wires of PA85A provide reliable interconnections at all operating temperatures. The 8-pin TO-3 package is hermetically sealed and electrically isolated. The use of compressible isolation washers voids the warranty.

Parameters:

Technical/Catalog Information	PA85A
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	1000 V/s
Gain Bandwidth Product	100MHz
Current - Supply	21mA
Current - Output/Channel	200mA
Voltage - Supply, Single/Dual (±)	30 V ~ 450 V, ±15 V ~ 225 V
Output Type	-
-3db Bandwidth	-
Current - Input Bias	3pA
Operating Temperature	-25°C ~ 85°C
Voltage - Input Offset	250V
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	PA85A PA85A 598 1327 ND 5981327ND 598-1327