Datasheet

Electrical characteristics STM32F765xx STM32F767xx STM32F768Ax STM32F769xx
172/255 DocID029041 Rev 6
5.3.28 DAC electrical characteristics
T
Coeff
(2)
Temperature coefficient - - 30 50 ppm/°C
t
START
(2)
Startup time - - 6 10 µs
1. Shortest sampling time can be determined in the application by multiple iterations.
2. Guaranteed by design.
Table 81. internal reference voltage (continued)
Symbol Parameter Conditions Min
Typ
Max Unit
Table 82. Internal reference voltage calibration values
Symbol Parameter Memory address
V
REFIN_CAL
Raw data acquired at temperature of 30 °C
VDDA
= 3.3 V 0x1FF0 F44A - 0x1FF0 F44B
Table 83. DAC characteristics
Symbol Parameter Min Typ Max Unit Comments
V
DDA
Analog supply voltage 1.7
(1)
-3.6 V -
V
REF+
Reference supply voltage 1.7
(1)
-3.6VV
REF+
≤ V
DDA
V
SSA
Ground 0 - 0 V -
R
LOAD
(2)
Resistive load
with buffer ON
Connected to
V
SSA
5- -
kΩ -
Connected to
V
DDA
25 - -
R
O
(2)
Impedance output with buffer
OFF
--15kΩ
When the buffer is OFF, the Minimum
resistive load between DAC_OUT and
V
SS
to have a 1% accuracy is 1.5 MΩ
C
LOAD
(2)
Capacitive load - - 50 pF
Maximum capacitive load at DAC_OUT
pin (when the buffer is ON).
DAC_OUT
min
(2)
Lower DAC_OUT voltage
with buffer ON
0.2 - - V
It gives the maximum output excursion of
the DAC.
It corresponds to 12-bit input code
(0x0E0) to (0xF1C) at V
REF+
= 3.6 V and
(0x1C7) to (0xE38) at V
REF+
= 1.7 V
DAC_OUT
max
(2)
Higher DAC_OUT voltage
with buffer ON
--
V
DDA
−
0.2
V
DAC_OUT
min
(2)
Lower DAC_OUT voltage
with buffer OFF
-0.5 -mV
It gives the maximum output excursion of
the DAC.
DAC_OUT
max
(2)
Higher DAC_OUT voltage
with buffer OFF
--
V
REF+
−
1LSB
V
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