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參數(shù)資料
| 型號(hào)： | T8532 |
| 元件分類： | Codec |
| 英文描述： | T8502 and T8503 Dual PCM Codecs with Filters |
| 中文描述： | T8502和T8503雙的PCM編解碼器與濾波器 |
| 文件頁數(shù)： | 45/48頁 |
| 文件大?。?/td> | 999K |
| 代理商： | T8532 |
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Lucent Technologies Inc.
45
Preliminary Data Sheet
November 2000
Codec Chip Set
T8531/T8532 Multichannel Programmable
Applications
(continued)
Common Voltage Reference
Every channel of the T8532 codec requires a 2.4 V ref-
erence (VRTX) for operation. Some SLICs provide this
reference for the codec. An external circuit is required
for SLICs without the reference voltage.
Figure 14 shows a circuit that can provide the 2.4 V ref-
erence for 16 or more channels. Even with the com-
mon reference voltage, interchannel crosstalk remains
insignificant. The circuit employs a single supply op
amp as a voltage follower. R1 and R2 set up the refer-
ence voltage. RL provides a reference bias when all
channels are programmed off and provides a dis-
charge path for the reference filtering. The op amp
s
upplies an ample minimum of 20 mA. Each channel’s
VRTX node only requires a maximum of 340
μ
A, and
VTX is a high-impedance input. The R
VREFx
resistors
provide the necessary bias for the VTX inputs.
12-3570 (F)x
Figure 14. Common 2.4 V Voltage Reference
2.15 k
R2
2.37 k
R1
0.1
μ
F
10
μ
F
5 V
3
2
–
+
5 V
8
4
1
1/2 LM2904
OR
EQUIVALENT
1.91 k
RL
0.1
μ
F
10
μ
F
VRTX15
VRTX1
VRTX0
VTX0
VTX1
VTX15
TO
T8531/2
R
VREF15
301 k
R
VREF1
301 k
R
VREF0
301 k
+
+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| T8533 | T8533/34 Quad Programmable Line Card Signal Processor |
| T8534 | T8533/34 Quad Programmable Line Card Signal Processor |
| T8535B | T8535B/T8536B Quad Programmable Codec |
| T8536B | T8535B/T8536B Quad Programmable Codec |
| T8538B | T8538B Quad Programmable Codec |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T8533 | 制造商:AGERE 制造商全稱:AGERE 功能描述:T8533/34 Quad Programmable Line Card Signal Processor |
| T85331G | 制造商:BITECH 制造商全稱:Bi technologies 功能描述:Thick Film Super Low Profile SIP Resistor Networks |
| T85331J | 制造商:BITECH 制造商全稱:Bi technologies 功能描述:Thick Film Super Low Profile SIP Resistor Networks |
| T8534 | 制造商:AGERE 制造商全稱:AGERE 功能描述:T8533/34 Quad Programmable Line Card Signal Processor |
| T8535B | 制造商:AGERE 制造商全稱:AGERE 功能描述:T8535B/T8536B Quad Programmable Codec |
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