XC3S500E-4FGG320C DataSheet
DATASHEET
XC3S500E-4FGG320C Description
Before the A/D digitizing the voice-band analog signal into digital format, the analog signal can be processed by a built-in Automatic Level Control (ALC) and pro- grammable Gain Amplifier (PGA). The ALC circuit controls the input level of A/D converter to about 1.5 Volt, so as to get a better signal to noise ratio during a low-level input. The PGA circuit is used to control the gain of different sources : microphone, aux or line input. After the digital data is converted into analog signal by the D/A converter, a fully differential line driver is supported to drive the telephone line directly without the need of external amplifier. On the other hand, the analog signal can be monitored by passing the analog signal to the on-chip volume control circuit, which can drive an external driver like LM386.
XC3S500E-4FGG320C Features
Thermal Design The XC3S500E-4FGG320C incorporates an internal thermal shutdown that protects the device when the junction temperature exceeds the maximum allowable junction temperature. Although this device can operate with junction tempera- tures in the range of 1508C, it is recommended that the selected heat sink be chosen such that during maxi- mum continuous load operation the junction tempera- ture is kept below this number. The example given shows the steps in selecting the proper regulator heat sink for driving the Pentium XC3S500E-4FGG320CXC3S500E-4FGG320CTM processor GTL+ termination resistors and the Clock XC3S500E-4FGG320CC using the XC3S500E-4FGG320C TO-263 package.
XC3S500E-4FGG320C Applicatioins
(EIAJ1201) Sampling Rate: 32/44.1/48/88.2/96 kHz Recover 128 / 256 / 384 / 512 fs System Clock Very Low Jitter System Clock Output (80ps Typically) On-Chip Master Clock Oscillator, Only an External 12.000 MHz or 16.000 MHz Crystal Is Required Selectable Output PCM Audio Data Format Output User Bit Data, Flag Signals, and Channel Status Data With Block Start Signal Single + 3.3-V Power Supply Package: 28 SSOP
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