UDA1380TT/N2,512

Overview

The UDA1380TT/N2,512 is a stereo audio coder-decoder designed for Mini-Disc, CD, and MP3 applications. It operates on a 2.4 to 3.6 V power supply with 5 V tolerant digital inputs. The device features a 24-bit data path for both ADC and DAC functions. The ADC supports sample frequencies from 8 to 55 kHz, while the DAC supports 8 to 100 kHz. It includes a stereo line input with PGA (0 to 24 dB gain) and a mono microphone input with LNA (29 dB fixed gain) and VGA (0 to 30 dB). The DAC provides separate single-ended line outputs and a stereo headphone driver capable of driving a 16 Ω load. Control is managed via L3-bus or I2C-bus interfaces.

Feature Summary

• Integrated stereo audio coding and decoding with independent clock domains for ADC and DAC
• Flexible analog front-end featuring programmable gain amplifiers and low noise microphone amplifier
• Advanced digital signal processing including automatic gain control, de-emphasis, and tone control
• Capless headphone driver output with integrated short-circuit protection

Applications

• Mini-Disc players
• Compact Disc players
• MP3 players

Procurement Notes

Verify the specific ordering suffix N2,512 against current NXP documentation to confirm package type and environmental compliance status. Ensure the design accounts for the device's default power-down state upon initialization. Confirm interface compatibility with the host controller's L3-bus or I2C-bus implementation before finalizing the bill of materials.

Selection Notes

Select this component when designing portable audio systems requiring high integration of analog and digital audio processing. The dual-clock capability allows asynchronous operation between recording and playback paths. Consider the available gain ranges of the PGA and VGA to match specific microphone and line-level input requirements without external amplification stages.

Part Context

The UDA1380TT variant utilizes a TSSOP32 plastic thin shrink small outline package with 32 leads and a body width of 6.1 mm. This package version offers identical functional specifications to the HVQFN32 variant. The TT designation specifically identifies the leaded surface-mount package configuration within the broader UDA1380 product family.

Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet. Designers should evaluate newer NXP audio codec families for modern replacements, ensuring pin compatibility and feature parity if a drop-in replacement is required.

FAQ

Can the ADC and DAC operate at different sampling frequencies?

Yes, the ADC and DAC parts can run at different frequencies. One can operate on the system clock while the other uses the Word Select PLL, or both can use different clock sources simultaneously.

What is the maximum gain range for the microphone input amplifier?

The microphone input features a Low Noise Amplifier with 29 dB fixed gain and a Variable Gain Amplifier providing an additional 0 to 30 dB gain in steps of 2 dB.

Does the headphone driver require external DC decoupling capacitors?

No, the headphone driver can be connected directly to the VREF(HP) pin, allowing it to drive headphones without the need for external DC decoupling capacitors.