Datasheet

Electrical characteristics STM32L431xx
154/200 DocID028800 Rev 1
R
network
R2/R1 internal
resistance
values in PGA
mode
(5)
PGA Gain = 2 - 80/80 -
k/k
PGA Gain = 4 -
120/
40
-
PGA Gain = 8 -
140/
20
-
PGA Gain = 16 -
150/
10
-
Delta R
Resistance
variation (R1 or
R2)
--15-15%
PGA gain error PGA gain error - -1 - 1 %
PGA BW
PGA bandwidth
for different non
inverting gain
Gain = 2 - -
GBW/
2
-
MHz
Gain = 4 - -
GBW/
4
-
Gain = 8 - -
GBW/
8
-
Gain = 16 - -
GBW/
16
-
en
Voltage noise
density
Normal mode
at 1 kHz, Output
loaded with 4 k
-500-
nV/Hz
Low-power mode
at 1 kHz, Output
loaded with 20 k
-600-
Normal mode
at 10 kHz, Output
loaded with 4 k
-180-
Low-power mode
at 10 kHz, Output
loaded with 20 k
-290-
I
DDA
(OPAMP)
(3)
OPAMP
consumption
from V
DDA
Normal mode
no Load, quiescent
mode
- 120 260
µA
Low-power mode - 45 100
1. Guaranteed by design, unless otherwise specified.
2. The temperature range is limited to 0 °C-125 °C when V
DDA
is below 2 V
3. Guaranteed by characterization results.
4. Mostly I/O leakage, when used in analog mode. Refer to I
lkg
parameter in Table 59: I/O static characteristics.
5. R2 is the internal resistance between OPAMP output and OPAMP inverting input. R1 is the internal resistance between
OPAMP inverting input and ground. The PGA gain =1+R2/R1
Table 74. OPAMP characteristics
(1)
(continued)
Symbol Parameter Conditions Min Typ Max Unit
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