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參數(shù)資料
| 型號： | UCB1200 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Advanced modem/audio analog front-end |
| 中文描述： | 先進的調(diào)制解調(diào)器/音頻模擬前端 |
| 文件頁數(shù)： | 11/54頁 |
| 文件大?。?/td> | 1052K |
| 代理商： | UCB1200 |
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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
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 (f
st
) 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:
2
F
×
(
)
TEL_DIV[n]
×
)
(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
-64
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UCB1200BE | Advanced modem/audio analog front-end |
| UCB1300 | Advanced modem/audio analog front-end |
| UCB1300BE | Advanced modem/audio analog front-end |
| UCB1400BE | Audio codec with touch screen controller and power management monitor |
| UCB1400 | Audio codec with touch screen controller and power management monitor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCB1200B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UCB1200B |
| UCB1200BE | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced modem/audio analog front-end |
| UCB1300 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced modem/audio analog front-end |
| UCB1300BE | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced modem/audio analog front-end |
| UCB1400 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Audio codec with touch screen controller and power management monitor |
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