Renesas Electronics CA3420
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.| Part No. | CA3420 |
|---|---|
| Datasheet | CA3420 Download |
| Manufacturer |  Renesas Electronics |
| Description | Low Input Current BiMOS Operational Amplifier |
| Buy | Stock & Price |
FEATURES
● 2V Supply at 300A Supply Current● 1pA Input Current (Typ) (Essentially Constant to 85°C)
● Rail-to-Rail Output Swing (Drive 2mA into 1k 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 X1 - MOS BIPOLAR + MOS BIPOLAR X1 BUFFER AMPS; BOOTSTRAPPED INPUT PROTECTION NETWORK HIGH GAIN (50K) OTA BUFFER (X2) Pinout CA3420 (PDIP) TOP VIEW OFFSET NULL 1 INV. INPUT 2 - NON-INV. 3 + INPUT V- 4 8 STROBE 7 V+ 6 OUTPUT 5 OFFSET NULL FN1320 Rev 9.00 Oct 4, 2005 Page 1 of 5 CA3420
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V+ to V-). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22V Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15V DC Input Voltage . . . . . . . . . . . . . . . . . . . . . . (V+ + 8V) to (V- -0.5V) Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
