Datasheet

DS6329 Rev 16 129/184
STM32F20xxx Electrical characteristics
183
Figure 55. Power supply and reference decoupling (V
REF+
connected to V
DDA
)
1. V
REF+
and V
REF–
inputs are both available on UFBGA176 package. V
REF+
is also available on all packages
except for LQFP64. When V
REF+
and V
REF–
are not available, they are internally connected to V
DDA
and
V
SSA
.
6.3.21 DAC electrical characteristics
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Table 68. DAC characteristics
Symbol Parameter Min Typ Max Unit Comments
V
DDA
Analog supply voltage 1.8
(1)
-3.6 V -
V
REF+
Reference supply voltage 1.8
(1)
-3.6VV
REF+
≤ V
DDA
V
SSA
Ground 0 - 0 V -
R
LOAD
(2)
Resistive load with buffer
ON
5- - kΩ -
R
O
(2)
Impedance output with
buffer OFF
-- 15 kΩ
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
Gives the maximum output excursion of
the DAC.
Corresponds to 12-bit input code
(0x0E0) to (0xF1C) at V
REF+
= 3.6 V
and (0x1C7) to (0xE38) at
V
REF+
= 1.8 V
DAC_OUT
max
(2)
Higher DAC_OUT voltage
with buffer ON
--V
DDA
– 0.2 V
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