參數(shù)資料
型號(hào): TB1254N
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PDIP56
封裝: 0.600 INCH, PLASTIC, SDIP-56
文件頁數(shù): 30/58頁
文件大小: 526K
代理商: TB1254N
Ver3.7
00/01/28 36
Note
Items/Symbols
Bus conditions
Measurement methods
S12
Audio switch cross-
talk
/ CT(s)T-E
/ CT(s)E-T
SIF-Freq. : 5.5M
AUDIO-SW : 0/1
AUDIO ATT : 127
Other : Preset
(1) Input a signal that 5.5[MHz], 100[dB
V], 50[kHz] deviated by
1[kHz] sine wave at pin 56.
(2) Connect pin 53 to GND through a 4.7[
F] capacitor.
(3) Measure level of the 1[kHz] at pin 4 (v#4T1[dB
V]).
(4) Set the bit of “AUDIO-SW” to “1”.
(5) Measure level of the 1[kHz] at pin 4 (v#4E1[dB
V]).
(6) CT(s)T-E[dB] = v#4E1-v#4T1
(7) Input a 5.5[MHz], 100[dB
V] signal at pin 56.
(8) Measure level of the 1[kHz] at pin 4 (v#4E2[dB
V]).
(9) Input a 1[kHz], 927[mVrms] signal at pin 53.
(10) Set the bit of “AUDIO-SW” to “0”.
(11) Measure level of the 1[kHz] at pin 4 (v#4T2[dB
V]).
(12) CT(s)E-T[dB] = v#4T2-v#4E2
S13
Audio switch off-set
/ Vos sw
SIF-Freq. : 5.5M
AUDIO-SW : 0/1
AUDIO ATT : 127
Other : Preset
(1) Input a 5.5[MHz], 100[dB
V] signal at pin 56.
(2) Connect pin 53 to GND through a 4.7[
F] capacitor.
(3) Set the bit of “AUDIO-SW” to “0”.
(4) Measure the voltage at pin 4 (V#4T[V]).
(5) Set the bit of “AUDIO-SW” to “1”.
(6) Measure the voltage at pin 4 (V#E[V]).
(7) Vos sw[V] = V#4E-V#4T
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