BUF16820AIDAPR

Video Amps And Modules Overview

The BUF16820AIDAPR is a programmable voltage reference generator designed for gamma correction in TFT-LCD panels. It provides 14 programmable outputs and two VCOM channels, each with 10-bit resolution. The device features on-chip one-time programmable (OTP) memory to store gamma voltages, eliminating the need for external EEPROM. It operates with an analog supply voltage from 8.5V to 18V and a digital supply from 2.0V to 5.5V. Programming occurs via an industry-standard two-wire serial interface supporting high-speed mode up to 3.4MHz. The component is housed in an HTSSOP-32 PowerPAD package.

Video Amps And Modules Feature Summary

• Integrates 14 programmable gamma outputs and two VCOM channels with 10-bit resolution
• Includes on-chip OTP memory for permanent storage of gamma voltage settings
• Supports high-speed two-wire serial interface with clock speeds up to 3.4MHz
• Features rail-to-rail output capability for wide dynamic range

Video Amps And Modules Applications

• Replacing resistor-based gamma solutions in display drivers
• Serving as a reference driver for TFT-LCD panels
• Enabling dynamic gamma control systems
• Programmable voltage generation for LCD panel calibration

Video Amps And Modules Procurement Notes

Verify component status as this model is classified as obsolete by the manufacturer. Confirm availability through authorized distributors or surplus suppliers. Ensure that the specific ordering suffix matches the required package variant. Check for alternative replacement parts if long-term supply stability is required for production.

Video Amps And Modules Selection Notes

Select this device when designing TFT-LCD reference drivers requiring programmable gamma correction without external memory components. It is suitable for applications needing precise voltage references with 10-bit resolution across multiple channels. Consider the power supply requirements of 8.5V to 18V for analog circuits and 2.0V to 5.5V for digital logic. Evaluate the HTSSOP-32 package constraints for PCB layout.

Video Amps And Modules Part Context

The BUF16820 belongs to Texas Instruments' family of LCD gamma buffers. It is part of a series that includes variants with different channel counts, such as the BUF20820 with 18 channels and the BUF12800 with 12 channels. These devices share similar programming interfaces and application goals within the display driver ecosystem.

Video Amps And Modules Replacement Considerations

Contact Texas Instruments sales or marketing representatives for information on current replacements or alternative parts with different channel counts. The datasheet lists related products like the BUF20820 and BUF12800 but does not specify direct pin-for-pin substitutes for this obsolete model.

Video Amps And Modules FAQ

How is the high-speed mode activated on the two-wire interface?

High-speed mode is activated by sending a special address byte of 00001xxx with SCL at 400kHz following the START condition. The last three bits are unique to the master and do not require acknowledgment.

What is the power-up behavior regarding DAC outputs?

Upon power-up, the device performs a full internal reset. All outputs change to the programmed OTP memory values or to zero if the OTP values have not been programmed.