RHF1401_12 Datasheet, PDF (16/42 Pages) STMicroelectronics – Rad-hard 14-bit 30 Msps A/D converter

Electrical characteristics
RHF1401
2.4
Results for differential input
Setup
● AVCC = DVCC = VCCBI = VCCBE = 2.5V
● VREFP = 1 V
● VREFM = 0 V
● INCM = VREFP/2
● REFMODE = 1 (internal references are disabled)
● Vin = full scale - 0.3 dB
● Tamb = 25C°
● A square clock is applied
Unless other test conditions are specified.
Figure 12. Differential configuration
2.5 V
GENERATOR
Differential
input signal
C_f
VCCBE
VIN ^VCCBI
AVCC
DVCC
VOCM
INCM
External 1V
REFP
VINB
REFM
External
Ground
AM04565
C_f is a filter capacitor to cut the HF noise. Its value is 10 nF for input frequencies equal to or
below 20 kHz. The value of the capacitor is divided by two when the input frequency is
multiplied by 2.
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Doc ID 13317 Rev 8