4.5MHz, OPERATION AMPLIFIER WITH MOSFET INPUT/BIPOLAR OUTPUT

DESCRIPTION

The UTC CA3140 is integrated circuit operational amplifier

that combine the advantages of high voltage PMOS transistors

with high voltage bipolar transistors on a single monolithic chip.

The UTC CA3140 operational amplifier feature gate protected

MOSFET (PMOS) transistors in the input circuit to provide very

high input impedance, very low input current, and high speed

performance. The UTC CA3140 operates at supply voltage from

4V to 36V (either single or dual supply). This is internally phase

compensated to achieve stable operation in unity gain follower

operation, and additionally, has access terminal 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 field effect

transistors in the input stage results in common mode input

voltage capability down to 0.5V below the negative supply

terminal, an important attribute for single supply applications. The

output stage uses bipolar transistors and includes built-in

protection against damage from load terminal short circuiting to

either supply rail or to ground.

The UTC CA3140 is intended for operation at supply voltages

up to 36V (±18V).

FEATURES

* MOSFET Input Stage

- Very High Input Impedance (ZIN) -1.5TΩ (Typ)

- Very Low Input Current (Il) -10pA (Typ) at ±15V

- Wide Common Mode Input Voltage Range (VlCR)
    - Can be SWUNG 0.5V Below Negative Supply Voltage Rail