參數(shù)資料
型號(hào)： T7503
廠商： Lineage Power
元件分類： Codec
英文描述： Dual PCM Codec with Filters(帶濾波器的雙PCM編解碼器)
中文描述： 雙PCM編解碼器與過(guò)濾器（帶濾波器的雙的PCM編解碼器）
文件頁(yè)數(shù)： 12/16頁(yè)
文件大?。?/td> 351K
代理商： T7503
12
Lucent Technologies Inc.
Data Sheet
February 1998
T7503 Dual PCM Codec with Filters
Applications
Figure 7 shows one possible analog connection. Fully differential structures used for the inputs minimize the noise
gain from the internal 2.4 V bias voltage to the output of the single-ended transmitter op amp. The forward path gain
is G, and by using resistors on the positive side that are a factor of 1/(2G + 1) of those on the negative side, the
microphone and transformer feeds are kept well balanced. Using this ratio, G can be as low as unity (0 dB) without
exceeding the common-mode limit of the op amp.
Users have wide latitude when selecting between a balanced amplifier configuration or a single-ended
configuration. Single-ended configurations usually need fewer external components (e.g., R
IP
=
∞
and R
FP
= 0 in
Figure 2) but have two disadvantages: one, dc blocking from the source is typically required; two, internally
generated noise at the common-mode pin VCM0 or VCM1 is amplified by G. For G > 10 (20 dB), this noise gain
can become the factor that could limit performance. Single-ended configurations can be used even with
microphones and transformers (R
IP
= 0 in these cases), but parasitic issues become somewhat more complex; so
single-ended configurations are only suggested for gains of four (12 dB) or less.
5-3789.a
Figure 7. Typical T7503 Application
2.4 V
MICROPHONE
SPEAKER
DSP
D
X
D
R
MCLK
FS
2.4 V
T7503
CENTRAL
OFFICE
LINE
G x R
SPEAKER
DRIVER
+
–
+
–
+
–
+
–
R
R
(
2G + 1)
R
R
(
2G + 1)
G x R
(
2G + 1)
G x R
G x R
(
2G + 1)
相關(guān)PDF資料
PDF描述
T7504 Quad PCM Codecs with Filters(帶濾波器的四PCM編解碼器)
T7507 Quad PCM Codec with Filters,Termination Impedance, and Hybrid Balance(帶濾波器、終端阻抗和混合平衡的四PCM編解碼器)
T7536 16-Channel Programmable Codec Chip Set(十六通道可編程編解碼器芯片組)
T7531A 16-Channel Programmable Codec Chip Set(十六通道可編程編解碼器芯片組)
T7570 Programmable PCM Codec with Hybrid-Balance Filter(帶混合平衡濾波器的可編程PCM編解碼器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T75-03A 制造商:The Cherry Corporation 功能描述:
T7504 制造商:AGERE 制造商全稱:AGERE 功能描述:T7504 and T75504 Quad PCM Codecs with Filters
T7507 制造商:AGERE 制造商全稱:AGERE 功能描述:T7507 Quad PCM Codec with Filters, Termination Impedance, and Hybrid Balance
T75-08M2 制造商:The Cherry Corporation 功能描述:
T-751 制造商:RHOMBUS-IND 制造商全稱:Rhombus Industries Inc. 功能描述:Fly Back Transformer
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*