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參數(shù)資料
| 型號： | TP3054J |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 編解碼器 |
| 英文描述： | Enhanced Serial Interface CODEC/Filter COMBO Family |
| 中文描述： | MU-LAW, PCM CODEC, CDIP16 |
| 封裝： | DIP-16 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 671K |
| 代理商： | TP3054J |
Applications Information
POWER SUPPLIES
While the pins of the TP3050 family are well protected
against electrical misuse, it is recommended that the stan-
dard CMOS practice be followed, ensuring that ground is
connected to the device before any other connections are
made. In applications where the printed circuit board may be
plugged into a “hot” socket with power and clocks already
present, an extra long ground pin in the connector should be
used.
All ground connections to each device should meet at a
common point as close as possible to the GNDA pin. This
minimizes the interaction of ground return currents flowing
through a common bus impedance. 0.1 μF supply decou-
pling capacitors should be connected from this common
ground point to V
CC
and V
BB
, as close to device pins as
possible.
For best performance, the ground point of each CODEC/
FILTER on a card should be connected to a common card
ground in star formation, rather than via a ground bus.
This common ground point should be decoupled to V
CC
and
V
BB
with 10 μF capacitors.
RECEIVE GAIN ADJUSTMENT
For applications where a TP3050 family CODEC/filter re-
ceive output must drive a 600
load, but a peak swing lower
than
±
2.5V is required, the receive gain can be easily ad-
justed by inserting a matched T-pad or
π
-pad at the output.
Table 2
lists the required resistor values for 600
termina-
tions. As these are generally non-standard values, the equa-
tions can be used to compute the attenuation of the closest
practical set of resistors. It may be necessary to use unequal
values for the R1 or R4 arms of the attenuators to achieve a
precise attenuation. Generally it is tolerable to allow a small
deviation of the input impedance from nominal while still
maintaining a good return loss. For example a 30 dB return
loss against 600
is obtained if the output impedance of the
attenuator is in the range 282
to 319
(assuming a perfect
transformer).
T-Pad Attenuator
00867411
T
www.national.com
12
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| TP3054N | Enhanced Serial Interface CODEC/Filter COMBO Family |
| TP3054WM | Enhanced Serial Interface CODEC/Filter COMBO Family |
| TP3057 | Enhanced Serial Interface CODEC/Filter COMBO Family |
| TP3057J | Enhanced Serial Interface CODEC/Filter COMBO Family |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TP3054J-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:u-Law CODEC |
| TP3054J-X | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:u-Law CODEC |
| TP3054N | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| TP3054N/NOPB | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| TP3054N-X | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Extended Temperature Serial Interface CODEC/Filter COMBO Family |
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