SPC56EL70L3 datasheet(98/128 Pages) STMICROELECTRONICS

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Electrical characteristics

SPC56EL70L3, SPC56EL70L5,PC564L70L3, SPC564L70L5

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DocID023953 Rev 5

Table 25. ADC conversion characteristics

Symbol

Parameter

Conditions(1)

Min

Typ

Max

Unit

fCK

ADC Clock frequency (depends on ADC

configuration)

(The duty cycle depends on AD_CK(2)

frequency)

—3

—

MHz

Sampling frequency

—

— 983.6(3) KHz

tsample

D Sample time(4)

60 MHz

383

—

teval

D Evaluation time(5)

60 MHz

625

—

CS(6)

D ADC input sampling capacitance

—

7.32

CP1(6)

D ADC input pin capacitance 1

—

5(7)

CP2(6)

D ADC input pin capacitance 2

—

0.8

RSW1(6)

D Internal resistance of analog source

VREF range = 4.5 to 5.5 V

—

0.3



VREF range = 3.0 to 3.6 V

—

875



RAD(6)

D Internal resistance of analog source

—

825



INL

P Integral non linearity

—

–3

—

LSB

DNL

P Differential non linearity(8)

—–1

—

LSB

OFS

T Offset error

—

–6

—

LSB

GNE

T Gain error

—

–6

—

LSB

IS1WINJ

—

(single ADC channel)

C Max positive/negative injection

–3

—

IS1WWINJ

(double ADC channel)

C Max positive/negative injection

|Vref_ad0 - Vref_ad1| <

150mV

–3.6

—

3.6

SNR

T Signal-to-noise ratio

Vref = 3.3V

—

SNR

T Signal-to-noise ratio

Vref = 5.0V

—

THD

T Total harmonic distortion

—

-65

—

SINAD

T Signal-to-noise and distortion

—

ENOB

T Effective number of bits

—

10.5

—

bits

TUEIS1WINJ T

Total unadjusted error for IS1WINJ

(single ADC channels)

Without current injection

–6

—

LSB

With current injection

–8

—

LSB

TUEIS1WWINJ

P Total unadjusted error for IS1WWINJ

(double ADC channels)

Without current injection

–8

—

LSB

With current injection

–10

—

LSB

1. TJ = –40 to +150 °C, unless otherwise specified and analog input voltage from VAGND to VAREF.

2. AD_CK clock is always half of the ADC module input clock defined via the auxiliary clock divider for the ADC.

3. This is the maximum frequency that the analog portion of the ADC can attain. A sustained conversion at this frequency is

not possible.

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