UA733CN

Overview

The UA733CN is a monolithic two-stage video amplifier with differential inputs and outputs, manufactured by Texas Instruments. It features selectable fixed differential voltage amplification of 10 V/V, 100 V/V, or 400 V/V, or adjustable gain from 10 V/V to 400 V/V via an external resistor between pins 1A and 1B. The device provides a bandwidth of up to 200 MHz and requires no external frequency compensation components. It operates on dual supplies within ±8 V limits, draws a typical supply current of 16 mA, and functions reliably across a temperature range of 0°C to +70°C.

Feature Summary

• Internal series-shunt feedback architecture ensures wide bandwidth, low phase distortion, and excellent gain stability without requiring external frequency-compensating components.
• Emitter-follower output stage design enables the device to effectively drive capacitive loads while maintaining high common-mode and supply-voltage rejection ratios through current-source biasing.

Applications

• Magnetic-tape or disc-file systems utilizing phase or NRZ encoding
• High-speed thin-film or plated-wire memories
• General-purpose video and pulse amplifiers requiring wide bandwidth and low phase shift

Procurement Notes

Verify that the specific part number UA733CN corresponds to the commercial grade variant characterized for operation between 0°C and +70°C. Confirm the package type matches the required PDIP-14 configuration for your circuit board layout. Ensure power dissipation calculations account for the thermal impedance of the plastic dual in-line package under maximum operating conditions.

Selection Notes

Select this component when differential signal processing with high bandwidth is necessary. The internal feedback mechanism eliminates the need for external compensation networks, simplifying the schematic. Verify that the application environment remains within the specified 0°C to +70°C operational range and that the supply voltage does not exceed the absolute maximum ratings of ±8 V.

Part Context

The UA733CN belongs to the µA733 family of monolithic video amplifiers produced by Texas Instruments. This series is designed for applications demanding precise differential amplification with minimal phase distortion. The CN suffix specifically denotes the commercial temperature grade housed in a standard 14-pin PDIP package, distinguishing it from military-grade variants or surface-mount options.

Replacement Considerations

Direct substitutes include other parts within the µA733 family such as the UA733CD (SOIC package) or UA733CNSR (SOP package), provided the pinout and electrical characteristics remain compatible with the existing design constraints.

FAQ

How is the gain adjusted on the UA733CN?

Gain can be set to fixed values of 10, 100, or 400 V/V using internal configurations, or adjusted continuously from 10 V/V to 400 V/V by connecting a single external resistor between pins 1A and 1B.

Does the UA733CN require external frequency compensation?

No, the device utilizes internal series-shunt feedback to provide stable performance across its bandwidth, eliminating the need for external frequency-compensating components.