tc9404fng TOSHIBA Semiconductor CORPORATION, tc9404fng Datasheet - Page 10

• Manufacturer Part Number: tc9404fng
• Description: Modulation System Da Converter With Analog Filter
• Manufacturer: TOSHIBA Semiconductor CORPORATION

(1)
(2)
Digital attenuator
different ways. The relationship with the command’s output is shown below.
Digital de-emphasis filter
The digital attenuation command is enabled when D7 = “L”. The attenuation data can be set in 128
01 (HEX) to 7E (HEX): The attenuation value is obtained with the following equation.
Example: In case of attenuator = 7 A
The Digital De-emphasis setting mode is enabled when D7 = “H”.
Controlled with µ EMP and µ BS signal.
ATT = 20 ℓog (input data/127) dB
ATT = 20 ℓog (122/127) dB = − 0.349dB
Table 6 Attenuation Data/Audio Data Output
Table 7 Digital De-Emphasis Filter Setting
µEMP
Mode
µBS
Attenuation Data D6~D0
7F (HEX)
7E (HEX)
01 (HEX)
00 (HEX)
:
32
H
H
10
48
H
L
44.1
Audio Output
H
L
−42.076dB
−0.000dB
−0.069dB
− ∞
:
OFF
L
L
(kHz)
TC9404FNG
2006-04-27