The AD8647ARMZ: Surface-mount only; no through-hole variant.
Slew rate and bandwidth
With a 24 MHz gain-bandwidth product and 11V/µs slew rate, the AD8647ARMZ handles fast signal edges — a 2 Vpp sine at 1 MHz stays within the linear slew limit, but a 5 Vpp step at that frequency would slew-rate limit the output. The rail-to-rail output stage keeps the swing close to the supply rails, useful for single-supply ADC drivers. Each of the two channels draws 1.5 mA supply current, totalling 3 mA for the dual package — the quiescent power at 5 V is 15 mW, low enough for portable or thermally constrained designs.
Input bias and offset
The 0.3 pA typical input bias current allows direct connection to high-impedance sources like photodiode or pH probe without a buffer — the voltage error across a 10 MΩ source is just 3 µV. The 600 µV maximum input offset voltage sets the DC accuracy floor; for precision below 100 µV, a chopper-stabilised amplifier would be needed. Output current capability of 120 mA per channel means the op-amp can drive a 50 Ω load to within 1 V of the rail — useful for cable-driving or headphone outputs without a separate buffer.
Supply voltage range
The 5.5 V maximum limits it to standard logic rails; 12 V or ±5 V systems need a different part.