link to page 6 NXP Semiconductors Product specification Low-cost stereo filter DAC UDA1330ATS Interpolation filter (DAC)Filter stream DAC The digital filter interpolates from 1fs to 128fs by cascading The FSDAC is a semi-digital reconstruction filter that a recursive filter and an FIR filter (see Table 4). converts the 1-bit data stream of the noise shaper to an analog output voltage. The filter coefficients are Table 4 Interpolation filter characteristics implemented as current sources and are summed at virtual ground of the output operational amplifier. In this way very ITEMCONDITIONVALUE (dB) high signal-to-noise performance and low clock jitter Pass-band ripple 0 to 0.45f ± s 0.1 sensitivity is achieved. A post-filter is not needed due to the inherent filter function of the DAC. On-board amplifiers Stop band >0.55f − s 50 convert the FSDAC output current to an output voltage Dynamic range 0 to 0.45fs 108 signal capable of driving a line output. Noise shaper The output voltage of the FSDAC scales linearly with the power supply voltage. The 3rd-order noise shaper operates at 128fs. It shifts in-band quantization noise to frequencies well above the Pin compatibility audio band. This noise shaping technique enables high signal-to-noise ratios to be achieved. The noise shaper In the L3 mode the UDA1330ATS can be used on boards output is converted into an analog signal using a Filter that are designed for the UDA1320ATS. Stream DAC (FSDAC). Remark : It should be noted that the UDA1330ATS is designed for 5 V operation while the UDA1320ATS is designed for 3 V operation. This means that the UDA1330ATS can be used with the UDA1320ATS supply voltage range, but the UDA1320ATS can not be used with the 5 V supply voltage. 2001 Feb 02 6 Document Outline Features General Multiple format input interface DAC digital sound processing Advanced audio configuration Applications General description Ordering information Quick reference data Block diagram Pinning Functional description System clock Application modes Multiple format input interface Interpolation filter (DAC) Noise shaper Filter stream DAC Pin compatibility L3 interface Address mode Data transfer mode Registers Programming the features Limiting values Handling Thermal characteristics Quality specification DC characteristics AC characteristics Timing Application information Package outline Soldering Introduction to soldering surface mount packages Reflow soldering Wave soldering Manual soldering Suitability of surface mount IC packages for wave and reflow soldering methods Data sheet status Disclaimers
