Datasheet

Electrical characteristics STM32L476xx
192/270 DS10198 Rev 8
Figure 34. 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.
I
DDV
(DAC)
DAC consumption from
V
REF+
DAC output
buffer ON
No load, middle
code (0x800)
- 185 240
µA
No load, worst code
(0xF1C)
- 340 400
DAC output
buffer OFF
No load, middle
code (0x800)
- 155 205
Sample and hold mode, buffer ON,
C
SH
= 100 nF, worst case
-
185 
Ton / (Ton
+Toff)
(4)
400 
To n /(To n
+Toff)
(4)
Sample and hold mode, buffer OFF,
C
SH
= 100 nF, worst case
-
155 
Ton / (Ton
+Toff)
(4)
205 
To n /(To n
+Toff)
(4)
1. Guaranteed by design.
2. In buffered mode, the output can overshoot above the final value for low input code (starting from min value).
3. Refer to Table 70: I/O static characteristics.
4. Ton is the Refresh phase duration. Toff is the Hold phase duration. Refer to RM0351 reference manual for more details.
Table 82. DAC characteristics
(1)
(continued)
Symbol Parameter Conditions Min Typ Max Unit
(1)
Buffer
12-bit
digital to
analog
converter
Buffered/non-buffered DAC
DACx_OUT
R
LOAD
C LOAD
ai17157d
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