STM32F398VE datasheet(140/151 Pages) STMICROELECTRONICS

140 / 151 page

Electrical characteristics

STM32F398VE

140/151

DocID027227 Rev 2

PGA gain

Non inverting gain value

-2

-4

-8

-16

Rnetwork

R2/R1 internal resistance values in

PGA mode (2)

Gain=2

5.4/5.4



Gain=4

16.2/5.4

Gain=8

37.8/5.4

Gain=16

40.5/2.7

PGA gain error

-1%

Ibias

OPAMP input bias current

0.2(3)

µA

PGA BW

PGA bandwidth for different non

inverting gain

PGA Gain = 2,

Cload = 50pF,

Rload = 4 K



-4

MHz

PGA Gain = 4,

Cload = 50pF,

Rload = 4 K



-2

PGA Gain = 8,

Cload = 50pF,

Rload = 4 K



-1

PGA Gain = 16,

Cload = 50pF,

Rload = 4 K



-0.5

Voltage noise density

@ 1KHz, Output

loaded with

4 K



-109

@ 10KHz,

Output loaded

with 4 K



-43

1. Guaranteed by design, not tested in production.

2. 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

3. Mostly TTa I/O leakage, when used in analog mode.

Table 80. Operational amplifier characteristics(1) (continued)

Symbol

Parameter

Condition

Min

Typ

Max

Unit

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