CA3420 Datasheet | Renesas

0.5MHz, Low Supply Voltage, Low Input Current Bi MOS Operational Amplifier FN1320 Rev 9.00 Oct 4, 2005 The CA3420 is an integrated circuit operational amplifier that bines PMOS transistors and bipolar transistors on a single monolithic chip. The CA3420 Bi MOS operational amplifier Features gate protected PMOS transistors in the input circuit to provide very high input impedance, very low input currents (less than 1p A). The internal bootstrapping network Features a unique guardbanding technique for reducing the doubling of leakage current for every 10°C increase in temperature. The CA3420 operates at total supply voltages from 2V to 20V either single or dual supply. This operational amplifier is internally phase pensated to achieve stable operation in the unity gain follower configuration. Additionally, it has access terminals for a supplementary external capacitor if additional frequency rolloff is desired. Terminals are also provided for use in applications requiring input offset voltage nulling. The use of PMOS in the input stage results in mon mode input voltage capability down to 0.45V below the negative supply terminal, an important attribute for single supply application. The output stage uses a feedback OTA type amplifier that can swing essentially from rail-to-rail. The output driving current of 1.5m A (Min) is provided by using nonlinear current mirrors. Ordering Information PART NUMBER PART TEMP. PKG. MARKING RANGE (°C) PACKAGE DWG. # CA3420E CA3420E -55 to 125 8 Ld PDIP E8.3 CA3420EZ (Note) CA3420EZ -55 to 125 8 Ld PDIP- E8.3 (Pb-free) - Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications. NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding pounds/die attach materials and 100% matte tin plate termination finish, which are Ro HS pliant and patible with both Sn Pb and Pb-free...