Operating Supply Voltage
:
Supply Current
:
Operating Temperature Range
:
Mounting Style
: SMD/SMT
Packaging
: Tray
Package / Case
: TQFP-44
Features: · END TO END DIGITAL AUDIO INTEGRATED SOLUTION
· DSP Functions:
- DIGITAL VOLUME CONTROL
- SOFT MUTE
- BASS and TREBLE
- PARAMETRIC EQ PER CHANNEL
- BASS MANAGEMENT FOR SUBWOOFER
- AUTO MUTE ON ZERO INPUT DETECTION
· 4+1 DIRECT DIGITAL AMPLIFICATION (DDX™) OUTPUT CHANNELs
· 6 CHANNELs PROGRAMMABLE SERIAL OUTPUT INTERFACE (by default I2S)
· 4 CHANNELs PROGRAMMABLE SERIAL INPUT INTERFACE (by default I2S)
· STEREO S/PDIF INPUT INTERFACE
· Intel AC'97 LINK (rev. 2.1) INPUT INTERFACE FOR AUDIO AND CONTROL
· ON CHIP AUTOMATIC INPUT SAMPLING FREQUENCY DETECTION
· 100 dB SNR SAMPLE RATE CONVERTER (1KHz SINUSOIDAL INPUT) n I2C CONTROL BUS
· LOW POWER 3.3V CMOS TECHNOLOGY
· EMBEDDED PLL FOR INTERNAL CLOCK GENERATION (1024x48 kHz = 49.152 MHz)
· 24.576 MHz EXTERNAL INPUT CLOCK OR BUILT-IN INDUSTRY STANDARD XTAL OSCILLATOR.Pinout
Specifications
| Symbol |
Parameter |
Value |
Unit |
| VDD |
Power Supply |
-0.3 to 4 |
V |
| Vi |
Voltage on input pins |
-0.3 to VDD+0.3 |
V |
| VO |
Voltage on output pins |
|
V |
| Tstg |
Storage Temperature |
-40 to 150 |
|
| TOP |
Operative ambient temperature |
-25 to 85 |
|
| PDD |
Power Consumption Digital |
tbd |
mW |
| PDA |
Power Consumption Analog |
tbd |
mW |
DescriptionThe STA304 Digital Audio Processor is a single chip device implementing end to end digital solution for audio application. In conjunction with STA500 power bridge it gives the full digital DSP-to-power high quality chain with no need for audio Digital-to-Analog converters between DSP and power stage.
The STA304 supports two main configurations as far as input sources: AC'97 input or IIS/SPDIF input: selection is made via a dedicated pin (AC97_MODE pin). The AC`97 can be configured to work in two different ways: 'Full Compliant' mode and 'Proprietary' mode which enables more features. The selection of the operating mode is done via a specific bit in a Vendor Reserved register (see bit 0: AC97_FC_mode in the CRA register, address 5Ah).
The 'Full Compliant' mode is compliant with rev. 2.1 of AC`97 link specifications.
This link can provide up to 6 input audio channels with sampling frequency of 44.1, 48, 88.2, 96 kHz, and the related controls.
In the IIS/SPDIF mode, a stereo S/PDIF and a 4 channels three-wires programmable serial input interface work in mutually exclusive way. Two channels with sampling frequency in the continuous range from 32 to 96 kHz are supported by the S/PDIF interface. Up to four channels with sampling frequency varying continuously from 32kHz up to 96 kHz are supported by the programmable serial interfaces. Among the different configurations, also the standard IIS protocol is supported.
An embedded high quality sample rate converter (SRC) resamples input data at the internal fixed sampling frequency
of 48 kHz for DSP operations.
The DSP is a 20x20 bit core audio processor performing several user controlled parametric algorithms, among them are dynamic and static equalization, Bass, Treble, Volume control and more. The DSP operates at 49.152MHz (1024xfs). This STA304 frequency is generated by an internal PLL with programmable multiplication factor (x2 or x8).
This STA304 has 5 channels Direct Digital Amplification (DDX™ technology), performing high efficiency class-D PWM output signals used to drive directly external power bridge stages (STA500).
In addition a 6 channel digital output programmable interface (supporting IIS standard protocol) is embedded for applications with commercial audio D/A converters. The STA304 output sampling frequency is fixed at 48 kHz when the interface operates as master. In addition an oversampled clock (256xfs or 512xfs) is provided externally for the D/A converters.
An IIC interface allows full programmability of internal algorithms and control registers via an external controller. An arbitration logic handles access conflicts to embedded control registers (which may occur as a consequence of contemporary access to control registers by AClink, IIC and DSP blocks).
STA304 Data Sheet
