Fast JFET op-amp in a hermetic can
The AD744TH from Analog Devices is a single JFET-input operational amplifier delivering a 75 V/µs slew rate and 13 MHz gain-bandwidth product. It operates from a 9 V to 36 V supply span and draws 3.5 mA quiescent current. The 30 pA input bias current and 250 µV input offset voltage suit precision signal conditioning in high-impedance sensor interfaces. Housed in a TO-99-8 metal can, it is rated for the full military temperature range of -55°C to 125°C, making it a candidate for avionics, satellite, and downhole instrumentation where hermetic sealing and wide thermal margin are required.
75 V/µs slew rate — what it means for the signal path
The 75 V/µs slew rate is the standout rating on this part. For comparison, the AD712KNZ and AD711JRZ-REEL7 — both JFET op-amps — are spec'd at 20 V/µs. The AD744TH's higher slew rate supports faster settling and larger signal swings at higher frequencies, which matters in waveform generation, fast ADC drivers, or pulse-processing front-ends where the slower sibling would introduce slew-induced distortion.
Package and temperature grade — deployment reality
The TO-99-8 metal can is a through-hole package. It is not a surface-mount footprint, so it requires board holes and manual or wave-solder assembly. The metal can provides a hermetic seal and better thermal dissipation than plastic DIP or SOIC packages. The -55°C to 125°C operating range covers military, aerospace, and industrial extremes — the part is not limited to commercial 0°C to 70°C environments. If your BOM calls for a plastic surface-mount JFET op-amp, the AD711JRZ-REEL7 or AD711KRZ-REEL7 are surface-mount alternatives, but they are rated only 0°C to 70°C and lack the hermetic seal.
Lifecycle and sourcing
The AD744TH carries an active lifecycle status per the manufacturer. It is RoHS non-compliant, so verify your assembly's RoHS exemption or accept the non-compliant status for high-reliability / military contracts where lead-bearing solder is still permitted. The part is sourced through independent distribution and quoted to order against an RFQ.