Single JFET op-amp in a hermetic ceramic DIP
The AD745BQ is a single-channel JFET-input operational amplifier from Analog Devices, packaged in an 8-pin ceramic DIP for through-hole mounting. It delivers a 12 V/µs slew rate and 20 MHz gain-bandwidth product, drawing 8 mA supply current. The JFET input stage keeps input bias current at 150 pA, and the output can source or sink 40 mA. Supply range spans 9.6 V to 36 V single or dual supply. The part is rated for 0°C to 70°C commercial temperature operation.
12 V/µs slew rate — what it means for signal fidelity
The 12 V/µs slew rate determines the maximum output voltage swing without distortion. This is adequate for audio line drivers, fast-settling DAC buffers, or moderate-speed ADC front-ends, but falls short of the 20 V/µs offered by the AD712KNZ or AD711JRZ-REEL7.
Hermetic ceramic package — reliability and sourcing note
The package is a hermetic ceramic body with a glass-to-metal seal, offering superior moisture resistance compared to plastic DIPs. This makes the AD745BQ a candidate for high-reliability or long-life applications where outgassing or humidity is a concern. The through-hole mounting requires a 0.300-inch (7.62 mm) row-spacing footprint. Bulk delivery means no tape-and-reel handling — each tube or tray of parts is manually inserted, so plan for manual assembly or selective solder processes.
Sourcing and availability
The AD745BQ is sourced through independent distribution channels. Submit an RFQ for current stock position and pricing. Because it is an active, RoHS-non-compliant part in a ceramic package, lead times can vary — the hermetic package has a different manufacturing flow than standard plastic parts.