PCM3060 24-bit Audio Codec - Texas Instruments

Posted in DSP - Digital Signal Processing, Texas Instruments, Audio
On Thursday, May 3, 2007

Texas Instruments introduced PCM3060, a 24-bit audio codec that supports asynchronous operation. The asynchronous operation allows the ADC and DAC to operate with independent clocks. Audio signal in some applications often need to be decoded and encoded at separate sampling rates. This can be accomplished by an asynchronous audio codec.

The PCM3060 audio codec enables developers to select the control method among modes of two-wire I2C, three-wire SPI, or hardware control. The audio codec can be internally set to synchronous mode where either the ADC or the DAC clock can be selected as the clocking source when only one clock is required. The PCM3060 audio codec also features design flexibility. As an example, the DAC outputs can be configured as either single-ended or differential for better noise immunity.

Key features of PCM3060 audio codec

24-Bit Delta-Sigma ADC and DAC
ADC, DAC Asynchronous Operation
Stereo ADC:
- High Performance: (Typical, 48 kHz)
  - THD+N: -93 dB
  - SNR: 99 dB
  - Dynamic Range: 99 dB
- Sampling Rate: 16-96 kHz
- System Clock: 256, 384, 512, 768 fS
- Full Scale Input: 3 Vp-p
- Antialiasing Filter Included
- 1/64 Decimation Filter:
  - Pass-Band Ripple: ±0.05 dB
  - Stop-Band Attenuation: -65 dB
- On-Chip High-Pass Filter: 0.91 Hz at fS = 48 kHz
Stereo DAC:
- High Performance: (Typical, Differential, 48 kHz)
  - THD+N: -94 dB
  - SNR: 105 dB
  - Dynamic Range: 104 dB
- Sampling Rate: 16-192 kHz
- System Clock: 128, 192, 256, 384, 512, 768 fS
- Differential Voltage Output: 8 Vp-p
- Single-Ended Voltage Output: 4 Vp-p
- Analog Low-Pass Filter Included
- 4×/8× Oversampling Digital Filter:
  - Pass-Band Ripple: ±0.04 dB
  - Stop-Band Attenuation: -50 dB
- Zero Flags
Flexible Mode Control
- 3-Wire SPI, 2-Wire I2C Compatible Serial Control Interface
- Hardware Control Mode
Multiple Functions via SPI or I2C Interface:
- Digital Attenuation and Soft Mute for ADC and DAC
- Digital De-Emphasis: 32, 44.1, 48 kHz for DAC
- Power Down: ADC/DAC Independently
- Asynchronous/Synchronous Control for ADC/DAC Operation
External Reset and Power-Down Pin:
- ADC/DAC Simultaneously
Audio Interface Mode:
- ADC/DAC Independent Master/Slave
Audio Data Format:
- ADC/DAC Independent
- I2S, Left-Justified, Right-Justified
Dual Power Supplies:
- 5-V for Analog and 3.3-V for Digital
Package: TSSOP-28
APPLICATIONS
- DVD-RW
- Digital TV
- Digital Set-Top Box
- Audio-Visual Applications

The PCM3060 has low jitter sensitivity and a high signal-to-noise ratio of 105 dB to provide great audio performance, even in asynchronous mode and for applications or clocks sources with high jitter. Customers can complete their audio system by interfacing the PCM3060 to a DSP such as TI’s TMS320C6x(TM) family of DSPs and to a stereo class-D audio power amplifier such as TI’s TPA3120. The new device also complements other products from TI’s broad audio product portfolio including line drivers, receivers, analog multiplexers, PurePath(TM) digital amplifiers and digital audio processors.

Comparation of TI’s 24-Bit, 96/192 kHz Audio Codec

	PCM3010	PCM3052A	PCM3060
# DACs / # ADCs	2 / 2	2 / 2	2 / 2
Sampling Rate(Max)(kHz)	192	96	192
Resolution(Bits)	24	24	24
SNR DAC / SNR ADC(Typ)(dB)	104 / 100	105 / 101	105 / 99
Digital Audio Interface	R, L, I2S	I2S	R, L, I2S
Control Interface	H/W	I2C	SPI, I2C, H/W
Pd(Typ)(mW)	190	228	160
Analog Supply(V)	4.5 - 5.5	4.5 - 5.5	4.5 - 5.5
Digital Supply (up to 5 V)(V)	3 - 3.6	3 - 3.6	2.7 - 3.6
Additional Features		Mic Amp, Bias, MUX, PGA, S/PDIF OUT	Asynchronous
Operating Temp Range(Celsius)	-25 to 85	-40 to 85	-25 to 85
Pin/Package	24SSOP	32QFN	28TSSOP
Approx. 1KU Price (US$)	4.00	2.40	1.95

The PCM3060 audio codec is available now in a 28-pin TSSOP lead-free package and is priced at $1.95 each for 1K lot qty.

Source: PCM3060 Audio Codec

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