Texas Instruments TMS320F28069

Zero-Pin Oscillator Frequency Movement With Temperature
9.6
9.7
9.8
9.9
10
10.1
10.2
10.3
10.4
10.5
10.6
–40
–30
–20 –10 0 10 20
30
40 50 60 70 80 90 100 110 120
Temperature (°C)
Output Frequency (MHz)
Typical
Max
33
TMS320F28069 , TMS320F28068 , TMS320F28067 , TMS320F28066
TMS320F28065, TMS320F28064, TMS320F28063, TMS320F28062
www.ti.com SPRS698F –NOVEMBER 2010–REVISED MARCH 2016
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SpecificationsCopyright © 2010–2016, Texas Instruments Incorporated
(1) In order to achieve better oscillator accuracy (10 MHz ± 1% or better) than shown, refer to the Oscillator Compensation Guide
Application Report (SPRAB84).
(2) Frequency range ensured only when VREG is enabled, VREGENZ = V
SS
.
(3) Output frequency of the internal oscillators follows the direction of both the temperature gradient and voltage (V
DD
) gradient. For
example:
• Increase in temperature will cause the output frequency to increase per the temperature coefficient.
• Decrease in voltage (V
DD
) will cause the output frequency to decrease per the voltage coefficient.
Table 5-7. Internal Zero-Pin Oscillator (INTOSC1/INTOSC2) Characteristics
PARAMETER MIN TYP MAX UNIT
Internal zero-pin oscillator 1 (INTOSC1) at 30°C
(1)(2)
Frequency 10.000 MHz
Internal zero-pin oscillator 2 (INTOSC2) at 30°C
(1)(2)
Frequency 10.000 MHz
Step size (coarse trim) 55 kHz
Step size (fine trim) 14 kHz
Temperature drift
(3)
3.03 4.85 kHz/°C
Voltage (V
DD
) drift
(3)
175 Hz/mV
Figure 5-8. Zero-Pin Oscillator Frequency Movement With Temperature