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CA3420 Arkusz danych(PDF) 1 Page - Intersil Corporation |
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CA3420 Arkusz danych(HTML) 1 Page - Intersil Corporation |
1 / 5 page 1 ® FN1320.9 CA3420 0.5MHz, Low Supply Voltage, Low Input Current BiMOS Operational Amplifier The CA3420 is an integrated circuit operational amplifier that combines PMOS transistors and bipolar transistors on a single monolithic chip. The CA3420 BiMOS operational amplifier features gate protected PMOS transistors in the input circuit to provide very high input impedance, very low input currents (less than 1pA). 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 compensated to achieve stable operation in the unity gain follower configuration. Additionally, it has access terminals for a supplementary external capacitor if additional frequency roll- off 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 common 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 1.5mA (Min) is provided by using nonlinear current mirrors. Features • 2V Supply at 300 µA Supply Current • 1pA Input Current (Typ) (Essentially Constant to 85°C) • Rail-to-Rail Output Swing (Drive ±2mA into 1kΩ Load) • Pin Compatible with 741 Operational Amplifiers • Pb-Free Plus Anneal Available (RoHS Compliant) Applications • pH Probe Amplifiers • Picoammeters • Electrometer (High Z) Instruments • Portable Equipment • Inaccessible Field Equipment • Battery-Dependent Equipment (Medical and Military) Functional Diagram Pinout CA3420 (PDIP) TOP VIEW Ordering Information PART NUMBER PART MARKING TEMP. RANGE (°C) PACKAGE PKG. DWG. # CA3420E CA3420E -55 to 125 8 Ld PDIP E8.3 CA3420EZ (Note) CA3420EZ -55 to 125 8 Ld PDIP* (Pb-free) E8.3 *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 compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. MOS BIPOLAR X1 X1 MOS BIPOLAR OTA BUFFER (X2) HIGH GAIN (50K) BUFFER AMPS; BOOTSTRAPPED INPUT PROTECTION NETWORK - + 1 2 3 4 8 7 6 5 + V+ OFFSET NULL INV. INPUT V- NON-INV. INPUT STROBE OUTPUT OFFSET NULL - Data Sheet October 4, 2005 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2002, 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. |
Podobny numer części - CA3420_05 |
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Podobny opis - CA3420_05 |
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