The PA89 is an ultra high 1,200 V power operational amplifier designed for output currents up to 75 mA to target high voltage applications including piezoelectric positioning, instrumentation, and electrostatic deflection. Output voltages can swing over 1,000 Vp-p.
High accuracy for this MOSFET power amplifier is achieved with a cascode input circuit configuration and 120dB open loop gain. All internal biasing is referenced to a bootstrapped zener-MOSFET current source, giving the PA89 a wide supply range and excellent supply rejection. External compensation provides user flexibility by allowing customers to tailor slew rate and bandwidth performance.
The PA89A is the A grade version to provide enhanced performance in the areas of offset voltage, bias current and offset current. The PA89 series is a hybrid product design housed in a hermetically sealed and electrically isolated 12-pin MO-127 metal PowerDIP package. The PA89 also is 100% gross leak tested to military standards for long term reliability. For continuous operation under load, a heatsink of proper rating is recommended.
| Part | Output Current MAX (A) | Supply Voltage MAX (V) | Slew Rate TYP (V/µs) | Standby Current MAX (mA) |  Power Dissipation MAX (W) |
|---|---|---|---|---|---|
| PA89 | 0.075 | 1200 | 30 | 6 | 40 |
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