PA78DK Apex, High Voltage, Op Amp, 300 V, 20-Pin PSOP. Mounting Type: Surface Mount. Power Supply Type: Dual, Single. Number of Channels per Chip: 1. Typical Dual Supply Voltage: ±150V. Typical Slew Rate: 350V/µs. Maximum Operating Temperature: +125 °C. Minimum Operating Temperature: -40 °C. Height: 3.4mm. Length: 16mm. Dimensions: 16 x 11.1 x 3.4mm. Typical Input Voltage Noise Density: 500nV/√Hz.