参数资料
型号: TMS320C2812ZHHS
厂商: TEXAS INSTRUMENTS INC
元件分类: 数字信号处理
英文描述: 16-BIT, 150 MHz, OTHER DSP, PBGA179
封装: LEAD FREE, BGA-179
文件页数: 121/156页
文件大小: 1826K
代理商: TMS320C2812ZHHS
Peripherals
67
April 2001 Revised October 2005
SPRS174M
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(A)
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(B)
10
mF(C)
10
mF(C)
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
NOTES: A. Provide access to this pin in PCB layouts. Intended for test purposes only.
B. Use 24.9 k
for ADC clock range 1 18.75 MHz; use 20 k for ADC clock range 18.75 25 MHz.
C. TAIYO YUDEN EMK325F106ZH, EMK325BJ106MD, or equivalent
D. External decoupling capacitors are recommended on all power pins.
E. Analog inputs must be driven from an operational amplifier that does not degrade the ADC performance.
Figure 45. ADC Pin Connections With Internal Reference
NOTE:
The temperature rating of any recommended component must match the rating of the end
product.
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