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ADCINA[7:0]
ADCINB[7:0]
ADCLO
ADCREFIN
ADC External Current Bias Resistor
ADCRESEXT
ADCREFP
V
DD1A18
V
DD2A18
V
SS1AGND
V
SS2AGND
V
DDAIO
V
SSAIO
V
DDA2
V
SSA2
ADC Reference Positive Output
ADCREFMADC Reference Medium Output
ADC Power
ADC Analog and Reference I/O Power
Analog input 0−3 V with respect to ADCLO
Connect to analog ground
22 kW
2.2 mF
(A)
2.2 mF
(A)
ADC Analog Power Pin (1.8 V)
ADC Analog Power Pin (1.8 V)
ADC Analog Power Pin (3.3 V)
ADC Analog I/O Ground Pin
ADC Analog Power Pin (3.3 V)
ADCREFP and ADCREFM should not
be loaded by external circuitry
ADC Analog Ground Pin
ADC 16-Channel Analog Inputs
Float or ground if internal reference is used
ADC Analog Ground Pin
ADC Analog Ground Pin
TMS320F2809, TMS320F2808, TMS320F2806
TMS320F2802, TMS320F2801, TMS320C2802
TMS320C2801, TMS320F28016, TMS320F28015
www.ti.com
SPRS230L–OCTOBER 2003–REVISED DECEMBER 2009
Figure 4-8 shows the ADC pin-biasing for internal reference and Figure 4-9 shows the ADC pin-biasing for
external reference.
A. TAIYO YUDEN LMK212BJ225MG-T or equivalent
B. External decoupling capacitors are recommended on all power pins.
C. Analog inputs must be driven from an operational amplifier that does not degrade the ADC performance.
Figure 4-8. ADC Pin Connections With Internal Reference
Copyright © 2003–2009, Texas Instruments Incorporated Peripherals 65
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Product Folder Link(s): TMS320F2809 TMS320F2808 TMS320F2806 TMS320F2802 TMS320F2801 TMS320C2802
TMS320C2801 TMS320F28016 TMS320F28015