IC-JX_16 Datasheet, PDF (34/48 Pages) IC-Haus GmbH – 16-FOLD 24 V HIGH-SIDE DRIVER

iC-JX
16-FOLD 24 V HIGH-SIDE DRIVER WITH µC INTERFACE
Rev C2, Page 34/48
The selection of the I/O stage is done via Control Word
5 (Addr. 0x1B, P. 22).
V_IO
VB_y
36V max.
5V ^{0.6V VR1} _VR2
VR5
the external supply voltages VB1 to VB4 (SELAD = 0x5)
can also be measured. For VB1 to VB4, the voltage is
downscaled first by a factor of 1/15. Selection is done
via SELES in Control Word 5 (Addr. 0x1B, P. 22) see
Tab. 11.
SELES(3:0)
Addr. 0x1B; bit 3:0
Code
selected supply voltage VB1. . . VB4
0x0. . . 0x3 VB1
0x4. . . 0x7 VB2
0x8. . . 0xB VB3
0xC. . . 0xF VB4
Table 11: ADC measurement: VB1..4 selection
0
5V _{0.6V VR3 VR4}
Figure 8: ADC measurement ranges
Note:
For the mode Overall voltage measurement range
at IO the voltage at the selected I/O stage is down-
scaled first by a factor of 1/15 using a resistive voltage
divider to permit measurement of the full voltage range
from rail to rail. The user must be aware of a input
current drawn by the voltage divider of approximately
V(IO)/200kΩ.
ADC Measurements: VB1..4 and VBG Measure-
ments
The internal reference voltage VBG (SELAD = 0x6) and
ADC Measurements: Temperature Measurement
With SELAD = 0x7 the internal chip temperature can be
determined.
ADC Measurements: Using external VREF
To improve accuracy of the A/D conversion, an external
reference voltage at pin VREF can be used by setting
the bit SVREF = 1 (see Control Word 6, P. 23). The
value of the external voltage reference should be about
2.5V ±0.2%.
SVREF
Code
0
1
Note
Addr. 0x1C; bit 5
Reference Voltage
V(Vrefad) = 2.75V¹
V(VREF) = 2.5V ±0.2%
1 _{Elec. Char. 747}
Table 12: Using external VREF