參數(shù)資料
型號(hào)： TMS57014ADWBLE
廠商： TEXAS INSTRUMENTS INC
元件分類： DAC
英文描述： DUAL, SERIAL INPUT LOADING, 18-BIT DAC, PDSO28
封裝： PLASTIC, SOIC-28
文件頁(yè)數(shù)： 17/17頁(yè)
文件大?。?/td> 250K
代理商： TMS57014ADWBLE
TMS57014A
DUAL AUDIO DIGITAL-TO-ANALOG CONVERTER
SLAS077D – SEPTEMBER 1993 – REVISED NOVEMBER 1995
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PWM output (L2 – L1 and R2 – R1)
The L 2 – L1 and the R2 – R1 output pairs are PWM signals with the L 2 – L1 differential pulse duration determining
the left-channel analog voltage and the R2 – R1 differential pulse duration determining the right-channel analog
voltage.
Each DAC left and right output consists of 15 levels of PWM and provides a differential signal as the input to
two external differential amplifiers configured as a low-pass filter to produce the left and right audio outputs (see
Figure 7).
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Analog supply voltage range, left and right, AVDDL, AVDDR (see Note 1)
– 0.3 V to 7 V
. . . . . . . . . . . . . . . . . .
Digital supply voltage range, DVDD (see Note 2)
– 0.3 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock supply voltage range, XVDD (see Note 3)
– 0.3 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, VO: L1, L2
– 0.3 V to AVDDL + 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R1, R2
– 0.3 V to AVDDR + 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI
– 0.3 V to DVDD + 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA
0
°C to 70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Case temperature for 10 seconds, TC
260
°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg
–55
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES:
1. Voltage values for maximum ratings are with respect to AGNDL and AGNDR respectively.
2. Voltage values for maximum ratings are with respect to DGND.
3. Voltage values for maximum ratings are with respect to XGND.
recommended operating conditions (see Note 4)
MIN
NOM
MAX
UNIT
Analog supply voltage, left and right, AVDDL, AVDDR
4.75
5
5.25
V
Digital supply voltage, DVDD
4.75
5
5.25
V
Clock supply voltage, XVDD
4.75
5
5.25
V
High level input voltage VIH
XIN
0.9 VDD
V
High-level input voltage, VIH
All other digital inputs
0.76 VDD
V
Low level input voltage VIL
XIN
0.1 VDD
V
Low-level input voltage, VIL
All other digital inputs
0.24 VDD
V
Load resistance at PWM, RL
10
k
Master clock frequency at XIN
16.3
24.6
MHz
Operating free-air temperature, TA
0
70
°C
NOTE 4: DVDD, AVDDL, XVDD and AVDDR tied together represents VDD.
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