參數(shù)資料
型號(hào)： TMP320R2811PBKS
廠商： Texas Instruments, Inc.
元件分類： 數(shù)字信號(hào)處理
英文描述： TMS320R2811, TMS320R2812 Digital Signal Processors
中文描述： TMS320R2811，TMS320R2812數(shù)字信號(hào)處理器
文件頁數(shù)： 61/147頁
文件大小： 2021K
代理商： TMP320R2811PBKS
Peripherals
61
June 2004
SPRS257
ADCINA[7:0]
ADCINB[7:0]
ADCLO
ADCBGREFIN
ADC External Current Bias Resistor
ADCRESEXT
ADCREFP
V
DDA1
V
DDA2
V
SSA1
V
SSA2
AVDDREFBG
AVSSREFBG
V
DDAIO
V
SSAIO
V
DD1
V
SS1
Test Pin
ADC Reference Positive Input
ADCREFM
ADC Reference Medium Input
ADC Analog Power
ADC Reference Power
ADC Analog I/O Power
ADC Digital Power
Analog Input 0
3 V With Respect to ADCLO
Connect to Analog Ground
24.9 k
Analog 3.3 V
Analog 3.3 V
Analog 3.3 V
Analog 3.3 V
Analog Ground
1.8 V Can use the same 1.8-V (or 1.9-V)
supply as the digital core but separate the
two with a ferrite bead or a filter
Digital Ground
ADC 16-Channel Analog Inputs
1 F
10 F
2 V
1 V
1 F
10 F
NOTES: A. External decoupling capacitors are recommended on all power pins.
B. Analog inputs must be driven from an operational amplifier that does not degrade the ADC performance.
C. It is recommended that buffered external references be provided with a voltage difference of (ADCREFP
ADCREFM)
= 1 V
0.1% or better.
External reference is enabled using bit 8 in the ADCTRL3 Register at ADC power up. In this mode, the accuracy of
external reference is critical for overall gain. The voltage ADCREFP
ADCREFM will determine the overall accuracy.
Do not enable internal references when external references are connected to ADCREFP and ADCREFM. See the
TMS320F28x DSP Analog-to-Digital Converter (ADC) Reference Guide
(literature number SPRU060) for more
information.
(See
Note C)
Figure 4
6. ADC Pin Connections With External Reference
A
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