Datasheet

DocID028800 Rev 1 147/200
STM32L431xx Electrical characteristics
168
Figure 32. 12-bit buffered / non-buffered DAC
1. The DAC integrates an output buffer that can be used to reduce the output impedance and to drive external loads directly
without the use of an external operational amplifier. The buffer can be bypassed by configuring the BOFFx bit in the
DAC_CR register.
.
3. Refer to Table 59: I/O static characteristics.
4. Ton is the Refresh phase duration. Toff is the Hold phase duration. Refer to RM0392 reference manual for more details.
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Table 71. DAC accuracy
(1)
Symbol Parameter Conditions Min Typ Max Unit
DNL
Differential non
linearity
(2)
DAC output buffer ON - - ±2
LSB
DAC output buffer OFF - - ±2
- monotonicity 10 bits guaranteed
INL
Integral non
linearity
(3)
DAC output buffer ON
CL 50 pF, RL 5 k
--±4
DAC output buffer OFF
CL 50 pF, no RL
--±4
Offset
Offset error at
code 0x800
(3)
DAC output buffer ON
CL 50 pF, RL 5 k
V
REF+
= 3.6 V - - ±12
V
REF+
= 1.8 V - - ±25
DAC output buffer OFF
CL 50 pF, no RL
--±8
Offset1
Offset error at
code 0x001
(4)
DAC output buffer OFF
CL 50 pF, no RL
--±5
OffsetCal
Offset Error at
code 0x800
after calibration
DAC output buffer ON
CL 50 pF, RL 5 k
V
REF+
= 3.6 V - - ±5
V
REF+
= 1.8 V - - ±7
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