Product category: Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: TPA6120A2
Edited by the Electronicstalk Editorial Team on 15 June 2004
Headphone driver completes hifi chipset
A new high-fidelity headphone driver completes an entire audio signal chain for super-audio compact disc and DVD audio players and other systems with similar demanding requirements
A new high-fidelity headphone driver completes an entire audio signal chain for super-audio compact disc (SACD) and DVD audio players and other systems with similar demanding requirements. The TPA6120A2 delivers exceptional performance in terms of dynamic range, signal to noise ratio and slew rate.
This article was originally published on Electronicstalk on 15 June 2004 at 8.00am (UK)
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When matched with the OPA4134 audio operational amplifier (op amp) and the PCM1792 or DSD1792 digital-to-analogue convertor (DAC) from TI's Burr-Brown product line, the entire audio chipset maintains a dynamic range greater than 120dB.
The chipset enables a pure and natural sound claimed to be so breathtaking the listener could mistake it for the original source.
The TPA6120A2 is based on a current-feedback architecture.
Three key advantages make current-feedback amplifiers excellent low distortion audio power amplifiers.
First, a lightning-quick 1300V/us slew rate prevents odd order distortion anomalies.
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Together with the slew rate, the high current-on-demand output enables the amplifier to respond quickly and linearly, avoiding any output distortion and unwanted noise.
Finally, the gain-independent frequency response maintains the full bandwidth of the amplifier at any gain setting, which keeps excess loop gain from decreasing and causing harmonic distortion.
Superior sound quality from the OPA4134 is derived from its FET input stage and high drive output stage.
The FET inputs respond very quickly and the output signal can swing to nearly 1V from the supply rails when driving impedances greater than 2kohm.
This exceptional operation delivers an ultralow 0.00008% total harmonic distortion (THD) and 8nV/(rt)Hz noise floor.
The PCM1792 and DSD1792 DACs employ TI's advanced-segment sigma-delta architecture, enabling unmatched dynamic range performance of up to 132dB, with improved tolerance to clock jitter.
Balanced current outputs provide increased immunity to noise and allow the user to optimise the analogue performance with the output filters.
Both the PCM1792 and DSD1792 accept 24bit PCM and 1bit DSD audio data formats, and features such as digital attenuation, de-emphasis and soft mute can be controlled with SPI or I2C interfaces.
In addition to offering the complete signal chain, TI offers the Aureus family of audio digital signal processors (DSP) to perform the audio processing functions in high-fidelity systems.
The TPA6120A2, OPA4134, PCM1792 and DSD1792 are available now from Texas Instruments and its authorised distributors.
The TPA6120A2 comes in a standard PowerPAD surface mount 20-pin small outline package (SOIC).
The OPA4134 is available in a standard 14-pin dual inline package (DIP) and a standard 14-pin small outline package (SOIC).
The PCM1792 and DSD1792 are available in standard surface mount 28-pin small shrink outline packages (SSOPs).
Suggested resale pricing in quantities of 1000 start at $1.90 for the TPA6120A2, $1.75 for the OPA4134 and $13.65 for the PCM1792 or DSD1792.
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