TMS320F28069_12 Datasheet, PDF (87/174 Pages) Texas Instruments – Piccolo Microcontrollers

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ADC OPERATING MODE
Mode A – Operating Mode
Mode B – Quick Wake Mode
Mode C – Comparator-Only Mode
Mode D – Off Mode
TMS320F28069, TMS320F28068, TMS320F28067, TMS320F28066
TMS320F28065, TMS320F28064, TMS320F28063, TMS320F28062
SPRS698D – NOVEMBER 2010 – REVISED DECEMBER 2012
Table 5-22. ADC Power Modes
CONDITIONS
ADC Clock Enabled
Bandgap On (ADCBGPWD = 1)
Reference On (ADCREFPWD = 1)
ADC Powered Up (ADCPWDN = 1)
ADC Clock Enabled
Bandgap On (ADCBGPWD = 1)
Reference On (ADCREFPWD = 1)
ADC Powered Up (ADCPWDN = 0)
ADC Clock Enabled
Bandgap On (ADCBGPWD = 1)
Reference On (ADCREFPWD = 0)
ADC Powered Up (ADCPWDN = 0)
ADC Clock Enabled
Bandgap On (ADCBGPWD = 0)
Reference On (ADCREFPWD = 0)
ADC Powered Up (ADCPWDN = 0)
I_DDA
16
UNITS
mA
4
mA
1.5
mA
0.075
mA
5.10.1.3.1 Internal Temperature Sensor
Table 5-23. Temperature Sensor Coefficient
T_SLOPE
PARAMETER ⁽¹⁾
MIN
Degrees C of temperature movement per measured ADC LSB change of the
temperature sensor
TYP
0.18 ^{(2) (3)}
MAX UNIT
°C/LSB
T_OFFSET
ADC output at 0°C of the temperature sensor
1750
LSB
(1) The temperature sensor slope and offset are given in terms of ADC LSBs using the internal reference of the ADC. Values must be
adjusted accordingly in external reference mode to the external reference voltage.
(2) ADC temperature coeffieicient is accounted for in this specification
(3) Output of the temperature sensor (in terms of LSBs) is sign-consistent with the direction of the temperature movement. Increasing
temperatures will give increasing ADC values relative to an initial value; decreasing temperatures will give decreasing ADC values
relative to an initial value.
5.10.1.3.2 ADC Power-Up Control Bit Timing
Table 5-24. ADC Power-Up Delays
PARAMETER ⁽¹⁾
MIN
MAX UNIT
t_d(PWD)
Delay time for the ADC to be stable after power up
1 ms
(1) Timings maintain compatibility to the ADC module. The 2806x ADC supports driving all 3 bits at the same time t_d(PWD) ms before first
conversion.
ADCPWDN/
ADCBGPWD/
ADCREFPWD/
ADCENABLE
Request for ADC
Conversion
td(PWD)
Figure 5-17. ADC Conversion Timing
Copyright © 2010–2012, Texas Instruments Incorporated
Peripheral and Electrical Specifications
87
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