TMS320F28027 Datasheet, PDF (110/130 Pages) Texas Instruments – Piccolo Microcontrollers

TMS320F28027, TMS320F28026, TMS320F28023, TMS320F28022
TMS320F28021, TMS320F28020, TMS320F280200
SPRS523F – NOVEMBER 2008 – REVISED DECEMBER 2010
www.ti.com
6.11.9 On-Chip Comparator/DAC
Table 6-37. Electrical Characteristics of the Comparator/DAC
CHARACTERISTIC
MIN
TYP
MAX UNITS
Comparator
Comparator Input Range
Comparator response time to PWM Trip Zone (Async)
V_SSA – V_DDA
V
30
ns
Input Offset
Input Hysteresis⁽¹⁾
±5
mV
35
mV
DAC
DAC Output Range
DAC resolution
V_SSA – V_DDA
V
10
bits
DAC settling time
See
Figure 6-23
DAC Gain
–1.5
%
DAC Offset
10
mV
Monotonic
Yes
INL
±3
LSB
(1) Hysteresis on the comparator inputs is achieved with a Schmidt trigger configuration. This results in an effective 100-kΩ feedback
resistance between the output of the comparator and the non-inverting input of the comparator. There is an option to disable the
hysteresis and, with it, the feedback resistance; see the TMS320x2802x, 2803x Piccolo Analog-to-Digital Converter (ADC) and
Comparator Reference Guide (literature number SPRUGE5) for more information on this option if needed in your system.
1100
1000
900
800
700
600
500
400
300
200
100
0
0
50
100
150
200
250
300
350
400
450
500
DAC Step Size (Codes)
DAC Accuracy
15 Codes
7 Codes
3 Codes
1 Code
Figure 6-23. DAC Settling Time
110 Electrical Specifications
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