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CA3420AT 데이터시트(PDF) 1 Page - Intersil Corporation |
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CA3420AT 데이터시트(HTML) 1 Page - Intersil Corporation |
1 / 6 page 1 TM File Number 1320.6 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000 CA3420, CA3420A 0.5MHz, Low Supply Voltage, Low Input Current BiMOS Operational Amplifiers The CA3420A and CA3420 are integrated circuit operational amplifiers that combine PMOS transistors and bipolar transistors on a single monolithic chip. The CA3420A and CA3420 BiMOS operational amplifiers feature 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 10oC increase in temperature. The CA3420 series operates at total supply voltages from 2V to 20V either single or dual supply. These operational amplifiers are internally phase compensated to achieve stable operation in the unity gain follower configuration. Additionally, they have 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 85oC) • Rail-to-Rail Output Swing (Drive ±2mA into 1kΩ Load) • Pin Compatible with 741 Operational Amplifiers Applications • pH Probe Amplifiers • Picoammeters • Electrometer (High Z) Instruments • Portable Equipment • Inaccessible Field Equipment • Battery-Dependent Equipment (Medical and Military) Functional Diagram Pinouts CA3420 (PDIP) TOP VIEW CA3420 (METAL CAN) TOP VIEW Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. CA3420AT -55 to 125 8 Pin Metal Can T8.C CA3420E -55 to 125 8 Ld PDIP E8.3 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 - OUTPUT OFFSET NULL 4 6 1 3 7 5 8 + STROBE V+ V- NON-INV. INPUT INV. INPUT TAB OFFSET NULL 2 - Data Sheet April 2000 |
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