Datasheet

DS6329 Rev 16 131/184
STM32F20xxx Electrical characteristics
183
Figure 56. 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.
6.3.22 Temperature sensor characteristics
Update
rate
(2)
Max frequency for a
correct DAC_OUT change
when small variation in the
input code (from code i to
i+1LSB)
-- 1 MS/s
C
LOAD
≤ 50 pF,
R
LOAD
≥ 5 kΩ
t
WAKEUP
(4)
Wakeup time from off state
(Setting the ENx bit in the
DAC Control register)
- 6.5 10 µs
C
LOAD
≤ 50 pF, R
LOAD
≥ 5 kΩ
input code between lowest and highest
possible ones.
PSRR+
(2)
Power supply rejection
ratio (to V
DDA
) (static DC
measurement)
- –67 –40 dB No R
LOAD
, C
LOAD
= 50 pF
1. On devices in WLCSP64+2 package, if IRROFF is set to V
DD
, the supply voltage can drop to 1.7 V when the device
operates in the 0 to 70 °C temperature range using an external power supply supervisor (see Section 3.16).
2. Guaranteed by design, not tested in production.
3. The quiescent mode corresponds to a state where the DAC maintains a stable output level to ensure that no dynamic
consumption occurs.
4. Guaranteed by characterization results, not tested in production.
Table 68. DAC characteristics (continued)
Symbol Parameter Min Typ Max Unit Comments
R
L
C
L
Buffered/Non-buffered DAC
DAC_OUTx
Buffer(1)
12-bit
digital to
analog
converter
ai17157V2
Table 69. Temperature sensor characteristics
Symbol Parameter Min Typ Max Unit
T
L
(1)
1. Guaranteed by characterization results, not tested in production.
V
SENSE
linearity with temperature - ±1 ±2°C
Avg_Slope
(1)
Average slope - 2.5 - mV/°C
V
25
(1)
Voltage at 25 °C - 0.76 - V
t
START
(2)
2. Guaranteed by design, not tested in production.
Startup time - 6 10 µs
T
S_temp
(2)
ADC sampling time when reading the
temperature (1 °C accuracy)
10 - - µs
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