Texas Instruments TMS320F2802 - Manual (Page 64)

ADCINA[7:0]
ADCINB[7:0]
ADCLO
ADCREFIN
ADCRESEXT
ADCREFP
V
DD1A18
V
DD2A18
V
SS1AGND
V
SS2AGND
V
DDAIO
V
SSAIO
V
DDA2
V
SSA2
ADCREFM
Analog input 0-3 V with respect to ADCLO
Connect to analog ground
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 External Current Bias Resistor
ADC Reference Positive Output
ADC Reference Medium Output
ADC Power
ADC Analog and Reference I/O Power
ADC 16-Channel Analog Inputs
Float or ground if internal reference is used
ADC Analog Ground Pin
ADC Analog Ground Pin
22 k
2.2 F μ
(A)
2.2 F μ
(A)
TMS320F2809, TMS320F2808, TMS320F2806
TMS320F2802, TMS320F2801, TMS320C2802
TMS320C2801, TMS320F28016, TMS320F28015
SPRS230N – OCTOBER 2003 – REVISED MAY 2012 www.ti.com
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
64 Peripherals Copyright © 2003–2012, Texas Instruments Incorporated
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TMS320C2801 TMS320F28016 TMS320F28015