Datasheet

Electrical characteristics STM32F427xx STM32F429xx
166/239 DocID024030 Rev 10
6.3.25 DAC electrical characteristics
Table 85. DAC characteristics
Symbol Parameter Conditions 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
DAC output
buffer ON
R
LOAD
connected
to V
SSA
5- -
kΩ
-
R
LOAD
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_O
UT
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_O
UT
max
(2)
Higher DAC_OUT
voltage with buffer ON
---
V
DDA
− 0.2
V
DAC_O
UT
min
(2)
Lower DAC_OUT
voltage with buffer
OFF
--0.5-mV
It gives the maximum output
excursion of the DAC.
DAC_O
UT
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)
- - 170 240
µA
With no load, worst code
(0x800) at V
REF+
= 3.6 V in
terms of DC consumption on
the inputs
- - 50 75
With no load, worst code
(0xF1C) at V
REF+
= 3.6 V in
terms of DC consumption on
the inputs
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