參數(shù)資料
型號(hào): UDA1334TS
廠商: NXP SEMICONDUCTORS
元件分類: DAC
英文描述: Low power audio DAC
中文描述: SERIAL INPUT LOADING, 24-BIT DAC, PDSO16
封裝: 4.40 MM, PLASTIC, MO-152, SSOP-16
文件頁(yè)數(shù): 9/24頁(yè)
文件大?。?/td> 108K
代理商: UDA1334TS
2002 May 22
9
Philips Semiconductors
Product specification
Low power audio DAC
UDA1334BT
8.6
Feature settings
The features of the UDA1334BT can be set by control
pins SFOR1, SFOR0, MUTE, DEEM and PCS.
8.6.1
D
IGITAL INTERFACE FORMAT SELECT
The digital audio interface formats (see Fig.5) can be
selected via the pins SFOR1 and SFOR0 as shown in
Table 4.
Table 4
Data format selection
8.6.2
M
UTE CONTROL
The output signal can be soft muted by setting pin MUTE
to HIGH level as shown in Table 5.
Table 5
Mute control
8.6.3
D
E
-
EMPHASIS CONTROL
De-emphasis can be switched on for f
s
= 44.1 kHz by
setting pin DEEM at HIGH level. The function description
of pin DEEM is given in Table 6.
Table 6
De-emphasis control
Remark:
the de-emphasis function in only supported in
the normal operating mode, not in the low sampling
frequency mode.
8.6.4
P
OWER CONTROL AND SAMPLING FREQUENCY
SELECT
Pin PCS is a 3-level pin and is used to set the mode of the
UDA1334BT. The definition is given in Table 7.
Table 7
PCS function definition
The low sampling frequency mode is required to have a
higher oversampling rate in the noise shaper in order to
improve the signal-to-noise ratio. In this mode the
oversamplingratioofthenoiseshaperwillbe128f
s
instead
of 64f
s
.
SFOR1
SFOR0
INPUT FORMAT
I
2
S-bus input
LSB-justified 16 bits input
LSB-justified 20 bits input
LSB-justified 24 bits input
LOW
LOW
HIGH
HIGH
LOW
HIGH
LOW
HIGH
MUTE
FUNCTION
LOW
HIGH
mute off
mute on
DEEM
FUNCTION
LOW
HIGH
de-emphasis off
de-emphasis on
PCS
FUNCTION
LOW
MID
HIGH
normal operating mode
low sampling frequency mode
Power-down or Sleep mode
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