Product category:
Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: PCM177x family
Edited by the Electronicstalk Editorial
Team on 26 September 2001
Low-power audio DACs save battery life
New from Texas Instruments is a family of high-performance D/A convertors for consumer audio applications including mobile phones, portable digital audio players and PDAs.
New from Texas Instruments is a family of high-performance D/A convertors for consumer audio applications including mobile phones, portable digital audio players, PDAs and digital still cameras Recognising customer's desires for longer battery life, the PCM177x family of audio DACs offers the lowest power consumption and the lowest supply voltages in the industry, and interface directly to TI's C5x and C6x DSPs
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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Although low in power consumption, the convertors offer excellent audio performance in consumer audio systems.
They are multifunctional and capable of mixing the voice input with the DAC output for playback, reducing component count and cost for the end product, as well as shrinking the mounting footprint.
They also incorporate pop- and noise-free circuits, for silent power on and off.
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The DACs offer the lowest power alternative for customers desiring low output power, complementing TI's TLV320DAC23 and TLV320AIC23, today's industry standard for low-power, high-performance audio DACs and codecs, respectively.
A total of four products are offered within the PCM177x family, providing a headphone amp and a line amp and a variety of control methods and features.
All products in the PCM177x DAC family are optimised for use in portable electronic devices, where increased audio performance, extended battery life and reduced size are key design goals.
The PCM177x uses a low-voltage source of 1.6 to 3.6V, while providing power consumption of just 5uA or 9.6uW (typical).
The high-performance internal headphone amplifier provides a power output of 10mW (stereo) or 20mW (mono) into a load of 16ohm.
Dynamic Range is 96dB (typical), and THD+N is 0.032% (typical) at 0dB.
With the PCM177x family, customer's are able to design applications such as portable cell phone gaming that require simultaneous listening to stereophonic music and a monaural voice signal.
This is the result of the family's internal analogue mixing function that combines an analog input with the DAC output during playback in the headphone amplifier output.
The PCM177x family complements TI's broad portfolio of audio data convertors, such as the TLV320DAC23 and TLV320AIC23, the industry's most highly integrated and lowest power audio codec, featuring 16 to 32bit of resolution, very low power consumption, and an extremely small footprint package.
In addition, the family easily interfaces with TI's programmable C5x and C6x families of DSPs.
Combining the DA250 DSP with the PCM177x family offers a complete, high-performance turnkey solution for portable digital audio players.
In addition to high performance portable audio ICs, TI offers high-performance solutions for DVD receiver, digital radio, RW CD-ROM, and music cell phone applications.
Samples of the PCM177x family will be available in November with volume product planned for December 2001.
Suggested resale pricing for the family begins at $1.95 per unit in quantities of 1000.
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