STM32W108CB datasheet(249/278 Pages) STMICROELECTRONICS

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STM32W108HB STM32W108CC STM32W108CB STM32W108CZ

Electrical characteristics

Doc ID 16252 Rev 14

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Table 57 describes the key ADC parameters measured at 25°C and VDD_PADS at 3.0 V, for

a sampling rate of 6 MHz. HVSELP and HVSELN are programmed to 0 to disable the input

buffer. The single-ended measurements were done at finput = 7.7% fNyquist; 0 dBFS level

(where full-scale is a 1.2 V p-p swing). The differential measurements were done at finput =

7.7% fNyquist; -6 dBFS level (where full-scale is a 2.4 V p-p swing) and a common mode

voltage of 0.6 V.

SMP[2:0]

Conversion Time (µs)

Nyquist Freq (kHz)

3 dB Cut-off (kHz)

INL (codes peak)

INL (codes RMS)

DNL (codes peak)

DNL (codes RMS)

ENOB (from single-cycle test)

SNR (dB)

SINAD (dB)

SDFR (dB)

THD (dB)

ENOB (from SNR)

ENOB (from SINAD)

Equivalent ADC Bits

Table 57.

ADC module key parameters for input buffer disabled

and 6 MHz sampling(1)

INL and DNL are referenced to a LSB of the Equivalent ADC Bits shown in the last row of Table 57. ENOB

(effective number of bits) can be calculated from either SNR (signal to non-harmonic noise ratio) or SINAD

(signal-to-noise and distortion ratio).

Parameter

Performance

5.33

10.7

21.3

42.7

85.3

171

341

683

93.8

46.9

23.4

11.7

5.86

2.93

1.47

0.732

56.6

28.3

14.1

7.07

3.54

1.77

0.884

0.442

0.084

0.15

0.274

0.518

1.057

2.106

4.174

0.046

0.044

0.076

0.147

0.292

0.58

1.14

2.352

0.026

0.023

0.044

0.052

0.096

0.119

0.196

0.371

0.007

0.009

0.013

0.015

0.024

0.03

0.05

0.082

5.6

7.0

8.5

10.0

11.4

12.6

13.1

13.2

Single-Ended

Differential

Single-Ended

Differential

Single-Ended

Differential

Single-Ended

Differential

-45

-54

-63

-68

-71

-70

-76

-70

-77

-70

-78

-70

-78

Single-Ended

Differential

5.6

7.1

8.6

10.0

10.1

11.4

11.5

12.1

12.5

12.4

12.9

12.5

13.0

Single-Ended

Differential

5.5

5.6

7.0

7.1

8.5

8.6

9.9

10.1

11.0

11.4

12.4

11.5

12.8

11.5

13.0

[15:11]

[15:10]

[15:9]

[15:8]

[15:7]

[15:6]

[15:5]

[15:4]

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