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Blog
Wednesday, September 13, 2006
Low-noise CMOS amplifier runs input pairs at higher currents
Sep 13 2006 1:25PM | Permalink |Comments (0) |
The low-noise LT6244 amplifier features the low 1-pA input-bias current of a CMOS or JFET amp but has 8 nV/√Hz and 0.5 fA/√Hz noise characteristics. It achieves these noise characteristics by running the input pair at higher currents, offering a 6.25-mA quiescent current. Features include a 1/f corner at 200 Hz, a 40V/µsec slew rate, a 120-dB voltage gain, and a 2.1-pF input capacitance. The LT6244 has an input offset of 100 µV maximum and a 300 µV maximum over temperature. Bandwidth is 50 MHz. The LT6244 uses a 6.35-mA supply current. It targets photodiodes and other transconductance-signal chains, as well as any application with high source impedance. Operating from 2.8 to 12V power supplies, the LT6244 costs $1.65 (1000).
Linear Technology, www.linear.com
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