TDA8784HL/C4,157

ADCs/DACs - Special Purpose Overview

The TDA8784HL/C4,157 is a 10-bit analog-to-digital interface designed for CCD camera systems. It integrates Correlated Double Sampling (CDS), 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) via a 3-wire serial interface. Key electrical parameters include a typical total power consumption of 483 mW, an AGC gain range of 4.5 to 34.5 dB, and operation on a 5 V analog supply with digital outputs supporting 2.5 to 5.25 V.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 10-bit ADC with CDS and AGC front-end for CCD signal conditioning
• Fully programmable via 3-wire serial interface for gain, bandwidth, and standby modes
• Includes 10-bit DAC for ADC clamp level control and 8-bit DAC for analog iris/output settings
• Supports 18 Msps sampling rate with 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 package type LQFP48 (SOT313-2) matches the design footprint. Confirm that the 5 V analog supply and 2.5–5.25 V digital output voltage requirements align with the system power rails. Ensure the PCB layout adheres to the recommended separate analog and digital ground plane connections with inductive linking near the IC to minimize noise coupling.

ADCs/DACs - Special Purpose Selection Notes

Select this component when interfacing directly with CCD sensors requiring integrated CDS and AGC functions. The 10-bit resolution and 18 Msps speed suit standard definition video applications. Consider the 48-pin LQFP package constraints and the need for decoupling capacitors on all supply pins as specified in the application diagram. Verify compatibility with the host controller's serial interface timing for SCLK and SDATA.

ADCs/DACs - Special Purpose Part Context

This part is manufactured by NXP USA Inc., formerly Philips Semiconductors. The datasheet supersedes the version from September 21, 1999, with the current specification dated October 23, 2002. It belongs to the TDA8784 family of CCD interface circuits, specifically optimized for high-speed analog-to-digital conversion in imaging applications.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and functional compatibility if considering alternative CCD interface ICs from other manufacturers.