STM32L021D4 datasheet(85/114 Pages) STMICROELECTRONICS

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STM32L021x4

Electrical characteristics

6.3.17

Comparators

Table 58. Comparator 1 characteristics

Symbol

Parameter

Conditions

Min(1)

Typ

Max(1)

1. Guaranteed by characterization, not tested in production.

Unit

VDDA

Analog supply voltage

1.65

3.6

R400K

R400K value

400

R10K

R10K value

VIN

Comparator 1 input

voltage range

-0.6

VDDA

tSTART

Comparator startup time

µs

Propagation delay(2)

2. The delay is characterized for 100 mV input step with 10 mV overdrive on the inverting input, the non-

inverting input set to the reference.

Voffset

Comparator offset(3)

3. In TSSOP14 package, where VDDA pin is shared with VDD pin, I/O toggling should be minimized to reach

the values given in the above table. I/O toggling with loaded I/O pins can generate ripple on VDD/VDDA and

degrade the comparator performance.

±3

±10

dVoffset/dt

Comparator offset

variation in worst voltage

stress conditions(3)

VDDA = 3.6 V

VIN+ = 0 V

VIN- = VREFINT

TA = 25 ° C

1.5

mV/1000 h

ICOMP1

Current consumption(4)

4. Comparator consumption only. Internal reference voltage not included.

160

260

Table 59. Comparator 2 characteristics

Symbol

Parameter

Conditions

Min Typ Max(1) Unit

VDDA

Analog supply voltage

1.65

3.6

VIN

Comparator 2 input voltage range

VDDA

tSTART

Comparator startup time

Fast mode

µs

Slow mode

td slow

Propagation delay(2) in slow mode

1.65 V

≤ VDDA ≤ 2.7 V

1.8

3.5

2.7 V

≤ VDDA ≤ 3.6 V

2.5

td fast

Propagation delay(2) in fast mode

1.65 V

≤ VDDA ≤ 2.7 V

0.8

2.7 V

≤ VDDA ≤ 3.6 V

1.2

Voffset

Comparator offset error(3)

±4

±20

dThreshold/

Threshold voltage temperature

coefficient

VDDA = 3.3V

TA = 0 to 50 ° C

V- =VREFINT,

3/4 VREFINT,

1/2 VREFINT,

1/4 VREFINT.

-15

ppm

/°C

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