Datasheet

Electrical characteristics STM32F745xx STM32F746xx
152/227 DocID027590 Rev 4
5.3.25 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 71. internal reference voltage (continued)
Symbol Parameter Conditions Min
Typ
Max Unit
Table 72. Internal reference voltage calibration values
Symbol Parameter Memory address
V
REFIN_CAL
Raw data acquired at temperature of 30 °C V
DDA
= 3.3 V 0x1FF0 F44A - 0x1FF0 F44B
Table 73. 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- 0V -
R
LOAD
(2)
Resistive load with buffer ON 5 - - kΩ -
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
I
VREF+
(4)
DAC DC V
REF
current
consumption in quiescent
mode (Standby mode)
-170240
µA
With no load, worst code (0x800) at
V
REF+
= 3.6 V in terms of DC
consumption on the inputs
-5075
With no load, worst code (0xF1C) at
V
REF+
= 3.6 V in terms of DC
consumption on the inputs
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