參數(shù)資料
型號: SM320F2812HFGM
廠商: TEXAS INSTRUMENTS INC
元件分類: 數(shù)字信號處理
英文描述: 16-BIT, 150 MHz, OTHER DSP, CQFP172
封裝: NCTB, CERAMIC, QFP-172
文件頁數(shù): 103/147頁
文件大?。?/td> 1721K
代理商: SM320F2812HFGM
Peripherals
59
December 2004
SGUS053
Figure 45 shows the ADC pin-biasing for internal reference and Figure 46 shows the ADC pin-biasing for
external reference.
ADCINA[7:0]
ADCINB[7:0]
ADCLO
ADCBGREFIN
ADC External Current Bias Resistor
ADCRESEXT
ADCREFP
VDDA1
VDDA2
VSSA1
VSSA2
AVDDREFBG
AVSSREFBG
VDDAIO
VSSAIO
VDD1
VSS1
Test Pin
ADC Reference Positive Output
ADCREFM
ADC Reference Medium Output
ADC Analog Power
ADC Reference Power
ADC Analog I/O Power
ADC Digital Power
Analog input 03 V with respect to ADCLO
Connect to Analog Ground
24.9 k
W/20 kW (See Note C)
10
mF
10
mF
Analog 3.3 V
Analog Ground
1.8 V
ADCREFP and ADCREFM should not
be loaded by external circuitry
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
Provide access to this pin in PCB layouts. Intended for test purposes only.
TAIYO YUDEN EMK325F106ZH, EMK325BJ106MD, or equivalent
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. Use 24.9 k
for ADC clock range 1 18.75 MHz; use 20 k for ADC clock range 18.75 25 MHz.
Figure 45. ADC Pin Connections With Internal Reference (See Notes A and B)
NOTE:
The temperature rating of any recommended component must match the rating of the end
product.
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