Electronic Components Datasheet Search |
|
UCB1200 Datasheet(PDF) 11 Page - NXP Semiconductors |
|
UCB1200 Datasheet(HTML) 11 Page - NXP Semiconductors |
11 / 54 page 1998 Jul 22 11 Philips Semiconductors Product specification Advanced modem/audio analog front-end UCB1200 TELECOM CODEC The telecom codec contains an input channel, built up from a 64 times oversampling sigma delta analog to digital converter (ADC) with digital decimation filters, programmable attenuation and built-in sidetone suppression circuit. The output path consist of a digital up sample filter, a 64 time oversampling 4 bit digital to analog converter (DAC) circuit followed by a differential output driver, capable of directly driving a 600 Ω isolation transformer. The output path includes a mute function. The telecom codec also incorporates a loopback mode, in which codec output path and the input path are connected in series. The telecom sample rate (fst) is derived from the SIB interface clock pin (SIBCLK) and is programmable through the SIB interface. The telecom sample rate is given by the following formula: (15 < TEL_DIV[n] <128) For example, a SIBCLK of 9.216 MHz, with a divisor of 40, results in a telecom sample rate of 7.2 kHz. Both the rising and the falling edges of the SIBCLK are used in case TEL_DIV[n] is set to an odd number. In that case a 50% duty cycle of the SIBCLK signal is mandatory to obtain time equidistant sampling. The input path of the telecom codec has a programmable attenuation. It also implements a voice band filter, which consists of an digital low pass filter, which is a part of the decimation filter. Therefore the pass band of the voice band Fig.7 Telecom codec block diagram. TINP TOUTP TOUTN TEL_SIDE_ENA TEL_LOOP 1bit ADC DIGITAL DECIMATION FILTER 14 TEL_IN_ENA TEL_OUT_ENA 14 TEL_MUTE 4bit DAC DIGITAL NOISE SHAPER TINN SIDETONE SUPPRESSION CIRCUIT TEL_ATT f st 2F SIBCLK × () 64 TEL_DIV[n] × () -------------------------------------------------- = |
Similar Part No. - UCB1200 |
|
Similar Description - UCB1200 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |