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參數(shù)資料
| 型號： | LC78834M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Stereo 18-bit Digital Audio D/A Converter with On-Chip 4 fs Digital Filters(立體聲18位數(shù)字音頻D/A轉(zhuǎn)換器帶片上4 fs數(shù)字濾波器) |
| 中文描述： | 立體聲18位數(shù)字音頻D / A轉(zhuǎn)換器與在片4個FS數(shù)字濾波器（立體聲18位數(shù)字音頻的D / A轉(zhuǎn)換器帶片上4個FS數(shù)字濾波器） |
| 文件頁數(shù)： | 10/14頁 |
| 文件大小： | 196K |
| 代理商： | LC78834M |
R-string DAC
The R-string DAC is a 9-bit D/A converter that consists of 512 (= 2
9
) individual resistors (each with resistance R)
connected in series that divide the voltage applied at the ends of that resistor string into 512 equal sections. Two
adjacent potentials, V1 and V2, of the voltage divided potentials, are selected by a switching circuit according to
the upper 9 bits of the data (D9 to D15). These two potentials are output to the PWM DAC. Note that V2 – V1 will
be equal to (VH – VL)/512.
PWM DAC
The PWM DAC is a 3-bit D/A converter that divides the span of the two potentials V1 and V2 output from the R-
string DAC by eight. This circuit outputs one or the other of the two potentials V1 and V2 from the CH1OUT (or
CH2OUT) pin depending on the value of the middle three bits (D6 to D8) of the data.
Level-shift DAC
The level-shift DAC is a 6-bit D/A converter that consists of two variable resistors, VRH and VRL, inserted in
series at the ends of the R-string DAC resistor string. The level-shift DAC controls the VRH and VRL variable
resistors according to the lower six bits of the data (D0 to D5) as follows.
— The sum of the resistances of VRH and VRL is held constant for all values of the data.
— The values of VRH and VRL are set to be between 0 and 63 times R/512 according to the value of the data.
(Here, R is the value of the resistance of the individual resistors in the R-string DAC.)
This changes the values of the R-string DAC outputs V1 and V2 in the range 0 to 63
×
V/512
(where
V = (VH – VL)/512) in steps of
V/512.
Reference resistors RH and RL
Capacitors (about 10 μF) must be connected between REFH and AGND and between REFL and AGND.
When AV
DD
= 5.0 V and AGND = 0 V, the LC78834M’s maximum output amplitude should be set to be the range
1.3 to 3.7 V (2.4 Vp-p) for a 0 dB playback level by the resistors RH and RL.
No. 4838-10/14
LC78834M
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LC78835 | 18 Bits Digital Filter and D/A Converter for Digital Audio |
| LC78835K | 18 Bits Digital Filter and D/A Converter for Digital Audio |
| LC78835KM | 18 Bits Digital Filter and D/A Converter for Digital Audio |
| LC78836 | Digital Audio 16-Bit D/A Converter with On-Chip Digital Filters |
| LC78836M | Digital Audio 16-Bit D/A Converter with On-Chip Digital Filters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC78835 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:18 Bits Digital Filter and D/A Converter for Digital Audio |
| LC78835K | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:18 Bits Digital Filter and D/A Converter for Digital Audio |
| LC78835KM | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:18 Bits Digital Filter and D/A Converter for Digital Audio |
| LC78835M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio Digital-to-Analog Converter |
| LC78836 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Digital Audio 16-Bit D/A Converter with On-Chip Digital Filters |
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