TDA8784HL/C5,118

ADCs/DACs - Special Purpose Overview

The TDA8784HL/C5,118 is a 10-bit analog-to-digital interface designed for CCD cameras. It integrates a correlated double sampling (CDS) circuit, an automatic gain control (AGC) amplifier, and a low-power 10-bit ADC with a reference regulator. The device supports sampling frequencies up to 18 MHz and features fully programmable bandwidths for CDS (4–120 MHz) and AGC (4–54 MHz). It operates on a 5 V analog supply and digital outputs compatible with 2.5 to 5.25 V logic levels. Key specifications include a typical power consumption of 483 mW and an AGC gain range of 4.5 to 34.5 dB.

ADCs/DACs - Special Purpose Feature Summary

• Integrated Correlated Double Sampling (CDS), AGC, and 10-bit ADC with adjustable bandwidths.
• Fully programmable via a 3-wire serial interface for gain, cutoff frequency, and standby modes.
• Includes an 8-bit DAC for analog settings and a 6 dB fixed gain output for analog iris control.
• Supports TTL compatible inputs and TTL/CMOS compatible digital outputs.

ADCs/DACs - Special Purpose Applications

• CCD camera systems
• PC cameras
• Surveillance cameras
• Camcorders
• Digital still cameras

ADCs/DACs - Special Purpose Procurement Notes

Verify the ordering suffix against the manufacturer's documentation to confirm package type and tape/reel specifications. Ensure that the voltage requirements for VCCA, VCCD, and VCCO align with the system design, as the device supports separate analog and digital supplies. Confirm availability through authorized NXP Semiconductors distributors or verified electronic component suppliers.

ADCs/DACs - Special Purpose Selection Notes

Select this component for applications requiring high-speed digitization of CCD sensor signals with integrated signal conditioning. The device is suitable where space is constrained due to its single-chip integration of CDS, AGC, and ADC functions. Consider the 48-LQFP package dimensions and the need for separate analog and digital ground planes to minimize noise in sensitive imaging applications.

ADCs/DACs - Special Purpose Part Context

The TDA8784 series was originally developed by Philips Semiconductors, which later became NXP Semiconductors. The datasheet indicates it supersedes data from September 21, 1999, with the current specification dated October 23, 2002. This part represents a specialized interface solution for video imaging systems prevalent in the early 2000s.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult NXP Semiconductors for current equivalent products or verify pin-compatible alternatives based on specific application requirements.

ADCs/DACs - Special Purpose FAQ

What is the maximum sampling frequency supported by the TDA8784?

The maximum clock frequency (fCLK) is 18 MHz, which corresponds to the maximum sampling rate.

How is the AGC gain controlled?

The AGC gain is programmable from 4.5 dB to 34.5 dB in 0.1 dB steps via a 9-bit control input through the serial interface.

Can the device operate with a digital supply voltage lower than 5 V?

Yes, the digital outputs can operate with a supply voltage (VCCO) ranging from 2.5 V to 5.25 V, while the analog and main digital supplies (VCCA, VCCD) typically require 5 V.