參數(shù)資料
型號: TLV320DAC3101IRHBR
廠商: TEXAS INSTRUMENTS INC
元件分類: DAC
英文描述: DAC WITH PROGRAMMABLE PLL, PQCC32
封裝: 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁數(shù): 29/100頁
文件大?。?/td> 1281K
代理商: TLV320DAC3101IRHBR
DAC_L
DAC_R
24 dB to Mute
Digital
7- Bit ADC
AVDD
P1
AVSS
R1
R2
18 dB to Mute
24 dB to Mute
D-
DAC
S
D-
DAC
S
Volume Level
Register Controlled
Vol
Ctl
Vol
Ctl
B0210-08
VREF
IN
AVDD
C
VOL
Tone Generator and Mixer Are
NOT Shown
VOL/
MICDET
Processing
Blocks
Processing
Blocks
SLAS666 – JANUARY 2010
www.ti.com
When the volume-pin function is used, a 7-bit Vol ADC reads the voltage on the VOL/MICDET pin and
updates the digital volume control. (It overwrites the current value of the volume control.) The new volume
setting which has been applied due to a change of voltage on the volume control pin can be read on
page 0 / register 117, bits D6–D0. The 7-bit Vol ADC clock source can be selected on page 0 /
register 116, bit D6. The update rate can be programmed on page 0 / register 116, bits D2–D0 for this
7-bit SAR ADC.
The VOL/MICDET pin gain mapping is shown in Table 5-18.
Table 5-18. VOL/MICDET Pin Gain Mapping
VOL/MICDET PIN SAR OUTPUT
DIGITAL GAIN APPLIED
0
18 dB
1
17.5 dB
2
17 dB
:
35
0.5 dB
36
0.0 dB
37
–0.5 dB
:
89
–26.5 dB
90
–27 dB
91
–28 dB
:
125
–62 dB
126
–63 dB
127
Mute
The VOL/MICDET pin connection and functionality are shown in Figure 5-17.
Figure 5-17. Digital Volume Controls for Beep Generator and DAC Play Data
34
APPLICATION INFORMATION
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TLV320DAC3101
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