參數(shù)資料
型號(hào): TMS320C242PGS
元件分類: 數(shù)字信號(hào)處理
英文描述: 16-Bit Digital Signal Processor
中文描述: 16位數(shù)字信號(hào)處理器
文件頁數(shù): 56/66頁
文件大?。?/td> 803K
代理商: TMS320C242PGS
TMS320C242
DSP CONTROLLER
SPRS063B – DECEMBER 1997 – REVISED DECEMBER 1999
56
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
10-bit dual analog-to-digital converter (ADC)
The 10-bit ADC has a separate power bus for its analog circuitry. These pins are referred to as V
CCA
and V
SSA
.
The power bus isolation is to enhance ADC performance by preventing digital switching noise of the logic
circuitry that can be present on V
SS
and V
CC
from coupling into the ADC analog stage. All ADC specifications
are given with respect to V
SSA
unless otherwise noted.
Resolution
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monotonic
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output conversion mode
000h to 3FFh (000h for V
I
V
SSA
; 3FFh for V
I
V
CCA
)
. . . . . . . . . . . . . . . . . . . . . . .
Conversion time (including sample time)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10-bit (1024 values)
Assured
1 s
recommended operating conditions
MIN
NOM
MAX
UNIT
VCCA
VSSA
VREFHI
VREFLO
VAI
VREFHI and VREFLO must be stable, within
±
1/2 LSB of the required resolution, during the entire conversion time.
Analog supply voltage
4.5
5
5.5
V
Analog ground
Analog supply reference source
Analog ground reference source
0
V
VREFLO
VSSA
VSSA
VCCA
VREFHI
VCCA
V
V
Analog input voltage, ADCIN00–ADCIN07
V
ADC operating frequency
MIN
MAX
20
UNIT
MHz
ADC operating frequency
A
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