Product Summary

The PA85 is a high voltage, high power bandwidth MOSFET operational amplifier designed for output currents up to 200mA. Output voltages can swing up to ±215V with a dual supply and up to +440 volts with a single supply. The safe operating area (SOA) has no second breakdown limitations and can be observed with all types of loads by choosing an appropriate current limiting resistor. High accuracy 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. The applicaitons of the PA85 are (1)high voltage instrumentation; (2)piezo transducer excitation; (3)programmable power supplies up to 430V; (4)electrostatic transducers & deflection.

Parametrics

PA85 absolute maximum ratings: (1)supply voltage, +VS to –VS: 450V; (2)output current, continuous within SOA: 200mA; (3)power dissipation, continuous @ TC = 25℃: 30W; (4)input voltage, differential: ±25V; (5)input voltage, common mode: ±VS; (6)temperature, pin solder - 10s max: 300℃; (7)temperature, junction: 150℃; (8)temperature, storage: –65 to +150℃; (9)operating temperature range, case:–55 to +125℃.

Features

PA85 features: (1)high voltage 450V (±225V); (2)high slew rate: 1000V/μS; (3)high output current: 200mA.

Diagrams

PA85 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
PA85
PA85
Cirrus Logic
Operational Amplifiers - Op Amps Linear Op-Amp 450V 1000V/Us
Data Sheet
Negotiable 
PA85M
PA85M
Cirrus Logic
Operational Amplifiers - Op Amps Linear Op-Amp 450V 1000V/uS Military
Data Sheet
Negotiable 
PA85A
PA85A
Cirrus Logic
Operational Amplifiers - Op Amps Linear Op-Amp 450V 1000V/uS "Select"
Data Sheet
Negotiable