IC-MQ_15 Datasheet, PDF (26/43 Pages) IC-Haus GmbH – Sin/Cos INTERPOLATION IC WITH RS422 DRIVER

iC-MQ PROGRAMMABLE 9-BIT
Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
SINE-TO-DIGITAL CONVERSION
Rev F3, Page 26/43
SELRES
Value
0x00E0
0x01B0
0x02A0
0x0398
0x0414
0x0590
0x078C
0x090A
0x0B88
0x0F86
0x1305
0x1784
0x1804
0x1F83
0x2F82
0x3102
0x5F81
0x6301
Addr 0x1C, bit 6:0; Addr 0x1B, bit 7:0
STEP
Angle Steps
Per Period
IPF
Interpolation
Factor
fin()max
Permissible Input
Frequency
(MTD=0x8)
4
1
500 kHz
8
2
500 kHz
12
3
200 kHz
16
4
200 kHz
20
5
200 kHz
24
6
166 kHz
32
8
125 kHz
40
10
100 kHz
48
12
83 kHz
64
16
62.5 kHz
80
20
50 kHz
96
24
40 kHz
100
25
40 kHz
128
32
30 kHz
192
48
20 kHz
200
50
20 kHz
384
96
10 kHz
400
100
10 kHz
Table 42: Converter Resolution
iC-MQ’s converter resolution can be set using SELRES.
For a resolution of 4, four angle steps per input signal
period are generated so that the switching frequency at
the A and B output matches the sine frequency at the
input.
The programmable converter hysteresis is determined
by SELHYS. It is set in multiples of 0.9° (360°/400) of
the input sin/cos cycle and may have a maximum of
11.7° of the input signal period. Two additional values
for SELHYS select 1/2 or 1 AB output step (edge).
SELHYS
Code
0x0
0x1
0x2
0x3-0xD
0xE*
0xF**
Notes
Addr 0x1D, bit 3:0
Function
Nearly no hysteresis
≈ 0.9°
≈ 1.8°
≈ 2.7°-11.7°
1/2 increment of STEP
1 increment of STEP
*) permissible for STEP ≤ 200;
**) not permissible for STEP = 4;
Table 43: Converter Hysteresis