st10f272z2 STMicroelectronics, st10f272z2 Datasheet - Page 148

• Manufacturer Part Number: st10f272z2
• Description: 16-bit Mcu With 256 Kbyte Flash Memory And 20 Kbyte Ram
• Manufacturer: STMicroelectronics

Electrical characteristics
Table 69.
Note:
25.7.2
148/189
ADCTC
11
11
11
11
10
10
10
10
ADSTC
A/D converter programming (continued)
The total conversion time is compatible with the formula valid for ST10F269, while the
meaning of the bit fields ADCTC and ADSTC is no longer compatible: the minimum
conversion time is 388 TCL, which at 40MHz CPU frequency corresponds to 4.85
ST10F269).
A/D conversion accuracy
The A/D Converter compares the analog voltage sampled on the selected analog input
channel to its analog reference voltage (V
absolute accuracy of the A/D conversion is the deviation between the input analog value and
the output digital value. It includes the following errors:
●
●
●
●
These four error quantities are explained below using
Offset error
Offset error is the deviation between actual and ideal A/D conversion characteristics when
the digital output value changes from the minimum (zero voltage) 00 to 01
OFS).
Gain error
Gain error is the deviation between the actual and ideal A/D conversion characteristics when
the digital output value changes from the 3FE to the maximum 3FF, once offset error is
subtracted. Gain error combined with offset error represents the so-called full-scale error
(Figure
Quantization error
Quantization error is the intrinsic error of the A/D converter and is expressed as 1/2 LSB.
00
01
10
11
00
01
10
11
Offset error (OFS)
Gain Error (GE)
Quantization error
Non-Linearity error (Differential and Integral)
42, OFS + GE).
TCL * 1600
TCL * 240
TCL * 280
TCL * 400
TCL * 800
TCL * 480
TCL * 560
TCL * 800
Sample
Comparison
TCL * 1120
TCL * 1120
TCL * 1120
TCL * 480
TCL * 560
TCL * 560
TCL * 560
TCL * 960
AREF
) and converts it into 10-bit digital data. The
Figure
TCL * 100
TCL * 100
TCL * 196
TCL * 164
TCL * 52
TCL * 28
TCL * 52
TCL * 52
Extra
42.
Total conversion
(Figure
TCL * 1060
TCL * 1444
TCL * 1540
TCL * 1732
TCL * 2116
TCL * 2884
TCL * 772
TCL * 868
ST10F272Z2
µ
42, see
s (see