TC1797_14 Datasheet, PDF (148/192 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller

TC1797
Electrical Parameters
Table 13 FADC Characteristics (Operating Conditions apply) (cont’d)
Parameter
Symbol
Values
Min. Typ. Max.
Unit Note /
Test Condition
Conversion time
t_C
CC –
– 21
Converter Clock
f_FADC SR –
– 90
Input resistance of R_FAIN
100 – 200
the analog voltage
CC
path (Rn, Rp)
CLK For 10-bit conv.
of f_ADC
MHz –
kΩ
9)
Channel Amplifier f_COFF
2
Cutoff Frequency⁹⁾
CC
––
MHz –
Settling Time of a t_SET
Channel Amplifier
after changing ENN
or ENP⁹⁾
CC –
–5
μs –
1) Calibration should be performed at each power-up. In case of continuous operation, calibration should be
performed minimum once per week, or on regular basis in order to compensate for temperature changes.
2) The offset error voltage drifts over the whole temperature range maximum ±6 LSB.
3) Applies when the gain of the channel equals one. For the other gain settings, the offset error increases; it must
be multiplied with the applied gain.
4) Voltage overshoots up to 4 V are permissible, provided the pulse duration is less than 100 μs and the
cumulated summary of the pulses does not exceed 1 h.
5) Voltage overshoots up to 1.7 V are permissible, provided the pulse duration is less than 100 μs and the
cumulated sum of the pulses does not exceed 1 h.
6) A running conversion may become inexact in case of violating the normal operating conditions (voltage
overshoots).
7) Current peaks of up to 40 mA with a duration of max. 2 ns may occur
8) This value applies in power-down mode.
9) Not subject to production test, verified by design / characterization.
The calibration procedure should run after each power-up, when all power supply
voltages and the reference voltage have stabilized. The offset calibration must run first,
followed by the gain calibration.
Data Sheet
144
V1.3, 2014-08