ST10F296 datasheet(302/346 Pages) STMICROELECTRONICS

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Electrical characteristics

ST10F296E

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24.7

ADC characteristics

VDD = 5 V ± 10 %, VSS = 0 V, TA = -40 to 125°C,

4.5 V

≤ VAREF ≤ VDD,

VSS ≤VAGND ≤VSS + 0.2 V

Table 166.

ADC characteristics

Symbol

Parameter

Test condition

Limit values

Unit

Min

Max

VAREF (SR) Analog reference voltage

(1)

VAREF can be tied to ground when ADC is not in use: An extra consumption (around 200 µA) on main VDD

is added because the internal analog circuitry is not completely turned off. It is suggested to maintain the

VAREF at VDD level even when not in use, and to eventually switch off the ADC circuitry setting bit, ADOFF,

in the ADCON register.

4.5

VDD

VAGND (SR) Analog ground voltage

VSS

VSS + 0.2

VAIN (SR)

Analog input voltage(2)

VAIN may exceed VAGND or VAREF up to the absolute maximum ratings. However, the conversion result in

these cases is 0x000H or 0x3FFH, respectively.

VAGND

VAREF

IAREF (CC) Reference supply current

Running mode(3)

Power-down mode

Not 100% tested, guaranteed by design characterization.

µA

tS (CC)

Sample time

(4)

During the sample time, tS, the input capacitance, CAIN, can be charged/discharged by the external source.

The internal resistance of the analog source must allow the capacitance to reach its final voltage level

within

S. After the end of the sample time, changes of the analog input voltage have no effect on the

conversion result. Values for the sample clock, tS, depend on programming and can be taken from

Table 167.

µs

tC (CC)

Conversion time

(5)

This parameter includes the sample time, tS, the time for determining the digital result, and the time to load

the result register with the conversion result. Values for the conversion clock, tCC, depend on programming

and can be taken from Table 167.

µs

DNL (CC)

Differential nonlinearity(6)

No overload

-1

LSB

INL (CC)

Integral nonlinearity (6)

No overload

-1.5

1.5

LSB

OFS (CC)

Offset error (6)

No overload

-1.5

1.5

LSB

TUE (CC)

Total unadjusted error(6)

-2.0

2.0

LSB

K (CC)

Coupling factor between

inputs(3)(7)

On both Port 5 and XPort 10

10-6

CP1 (CC)

Input pin capacitance(3)(8)

-3

CP2 (CC)

Port 5

XPort 10

CS (CC)

Sampling capacitance(3)(8)

-3.5

RSW (CC)

Analog switch resistance (3)(8)

Port 5

XPort 10

600

1600

Ω

RAD (CC)

1300

Ω

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