60 MHz GBW and 20 V/µs slew rate — signal-chain bandwidth anchor
The LT6221IDD#PBF is a dual general-purpose op-amp from the LT® series, delivering 60 MHz gain-bandwidth product and 20 V/µs slew rate across two channels. This combination means the amplifier maintains closed-loop gain accuracy up to several MHz and slews fast enough to reproduce a 5 V peak-to-peak square wave at about 250 kHz without significant distortion — relevant for ADC driver stages, active filters, or high-speed data acquisition front-ends where both small-signal bandwidth and large-signal transient response matter. Supply current is 1 mA per channel (2 mA total for the dual), with a supply span from 2.2 V to 12.6 V.
Rail-to-rail output and precision trade-offs
Rail-to-rail output swing lets the amplifier drive its output to within millivolts of either supply rail — critical in low-voltage single-supply chains where headroom is scarce. The 50 mA output current per channel can drive moderate loads like a 100 Ω headphone or a 10-bit ADC reference buffer without external boost. Input offset voltage is 700 µV maximum, and input bias current is 250 nA. These are moderate figures — fine for general-purpose signal conditioning (e.g., sensor amplification, filter stages) but not suited for precision microvolt-level applications where a chopper-stabilized or auto-zero amplifier would be needed. The 250 nA bias matters when source impedance exceeds about 10 kΩ, where the voltage drop across the source resistance becomes significant.
Industrial temperature range and package integration
Surface-mount DFN-8 with exposed pad — the pad is electrically connected to the die substrate (typically V–), so the PCB copper pour underneath must be at the same potential.