0.5MHz, Low Supply Voltage, Low Input Current BiMOS Operational Amplifiers
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扩展 ECAD 模块
概览
描述
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 10oC 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 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 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.
特性
- 2V Supply at 300µA 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)
应用
应用
- pH Probe Amplifiers
- Picoammeters
- Electrometer (High Z) Instruments
- Portable Equipment
- Inaccessible Field Equipment
- Battery-Dependent Equipment (Medical and Military)
设计和开发
模块
ECAD 模块
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
产品选择
Processing table
| PDIP | Tube | 1000 | 获取样片, |
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