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參數資料
| 型號： | UCB1200 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Advanced modem/audio analog front-end |
| 中文描述： | 先進的調制解調器/音頻模擬前端 |
| 文件頁數： | 9/54頁 |
| 文件大小： | 1052K |
| 代理商： | UCB1200 |
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1998 Jul 22
9
Philips Semiconductors
Product specification
Advanced modem/audio analog front-end
UCB1200
The output level can be attenuated in 3 dB steps down to -69 dB. The first 8 attenuation steps (0 to 21 dB) are
implemented in the analog domain. The digital up sample filter contains a 24 dB and a 48 dB attenuation setting. This
arrangement preserves the resolution, thus the ‘audio quality’ of the audio output signal for attenuation settings till 21 dB.
The speaker driver is muted when AUDIO_MUTE in the audio control register B is set. The speaker driver will remain
activated in that case, however no signal is produced by the speaker driver circuit.
The speaker driver is designed to directly drive a bridge tied load (BTL). This yields the highest output power and this
arrangement does not require external DC blocking capacitors. The speaker driver also accepts single ended connection
of a speaker, in which case the maximum output power is reduced to a quarter of the BTL situation. Consequently this
way of connecting the speaker to the speaker driver reduces the power consumption of the speaker driver in the
UCB1200 by a factor of 2. Fig.6 shows possible ways to connect a speaker to the driver. Loading the amplifiers with a
capacitive load may cause high frequency oscillations and should be done cautiously.
Fig.5 Analog and digital attenuation settings audio output path.
programmed attenuation
0dB
24dB
48dB
69dB
21dB
0dB
24dB
48dB
相關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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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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