TSC2301IGQZ

Overview

The TSC2301IGQZ is a highly integrated analog interface circuit manufactured by Texas Instruments, designed for personal digital assistants and mobile devices. It combines a 4-wire resistive touch screen controller with a 20-bit stereo audio codec. The device features an SPI serial interface for host communication and supports programmable resolutions of 8, 10, or 12 bits for touch sensing at sampling rates up to 125 kHz. The audio section includes a delta-sigma ADC/DAC with a dynamic range of 98 dB and a sampling rate up to 48 kHz via an I2S interface. Operating on a single 2.7 V to 3.6 V supply, it integrates battery monitoring, temperature sensing, and a keypad scanner within a 64-pin TQFP package.

Feature Summary

• Integrated 4-wire resistive touch screen controller with programmable resolution (8/10/12 bits) and sampling rates up to 125 kHz.
• High-performance 20-bit stereo audio codec featuring a delta-sigma ADC/DAC, microphone pre-amplifier, and headphone driver with 98 dB dynamic range.
• On-chip peripherals include dual battery monitors (up to 6 V), a temperature sensor with 0.3 °C resolution, and a 4x4 keypad interface.
• Standard SPI control interface and I2S audio interface with internal timing control to reduce host CPU overhead.

Applications

• Personal Digital Assistants (PDAs)
• Cellular Phones
• MP3 Players
• Smartphones
• Internet Appliances

Procurement Notes

Verify the ordering suffix 'GQZ' corresponds to the 64-lead TQFP package and industrial temperature range (-40°C to +85°C). Confirm that the specific revision level matches the design requirements, as datasheet revisions may impact parameter specifications. Ensure compatibility with the host system's voltage levels for the SPI and I2S interfaces.

Selection Notes

Select this component when a single IC solution is required for both resistive touch input and high-fidelity stereo audio processing. It is suitable for designs constrained by power supply voltage between 2.7 V and 3.6 V. Consider the 64-pin TQFP footprint during PCB layout. Verify that the host processor supports the necessary SPI and I2S protocols for configuration and data transfer.

Part Context

The TSC2301IGQZ belongs to the TSC2301 family from Texas Instruments. It is functionally equivalent to other variants in the series, such as the TSC2301IPAG, differing primarily in packaging and reel quantity. The 'I' designation indicates the industrial operating temperature range, while 'GQZ' specifies the 64-pin TQFP package type.

Replacement Considerations

Direct replacements within the same package and electrical specification include the TSC2301IPAG. For tape-and-reel packaging options, the TSC2301IGQZR is available. Cross-package substitutions require careful review of pinout compatibility and thermal performance.