iC-NQC
13-bit Sin/D CONVERTER WITH SIGNAL CALIBRATION
Rev D1, Page 15/29
INCREMENTAL SIGNALS
CFGABZ
Code
Adr 0x02, Bit 3:2
Mode
Pin A
A
Pin B
B
Pin Z
Z
0x00
Normal
0x01
Control signals for
CA
CB
CZ
external period counters
0x02
0x03
Notes
Calibration mode
Offset+Phase
The following settings
are required additionally:
SELRES = 0x0D
ZPOS = 0x00
HYS = 0x07
ROT = 0x00
CFGAB = 0x00
AERR = 0x00
Figure 5: Offset SIN*
Figure 6: Offs. COS*
Figure 7: Phase*
Calibration mode
Offset+Amplitude
The following settings
are required additionally:
SELRES = 0x0D
ZPOS = 0x00
HYS = 0x07
ROT = 0x00
CFGAB = 0x00
AERR = 0x00
Figure 8: Offset SIN*
Figure 9: Offs. COS*
Figure 10: Amplit.*
*) Trimmed accurately when duty cycle is 50 %;
Recommended trimming order (after selecting GAIN): offset, phase, amplitude ratio, offset;
Table 17: Outputs A, B, Z
ROT
Code
0x00
0x01
Adr 0x02, Bit 5
Code direction
SIN
Ascending order, B then A
Descending order, A then B
COS
Table 18: Code direction
cw: F->0
FFFFFF
P(23:0)
000000
CBZ
Code
0x00
0x01
Adr 0x02, Bit 4
Reset via zero
Not activated
Activated
ccw: 0->F
A
B
Z
Table 19: Reset enable for period counter
-180°
-90°
0°
45°
90°
180°
Figure 11: Period counter reset by zero signal (en-
abled by CBZ = 1).
ENRESDEL Adr 0x02, Bit 7
Example gives
a resolution of 64
Code
0x00
Output*
Function
(SELRES = 0x0A), a zero signal at 45°
(ZPOS = 0x04, CFGAB = 0x00) and no
inversion of the direction of rotation
(ROT = 0x00, COS leads SIN).
immediately
An external counter displays the
absolute angle following power-on.
0x01
after 5 ms
An external counter only displays
changes vs. the initial power-on
(conditional on standby at
power-on)
Notes
*) Output delay after device configuration and
internal reset (A, B, Z remains on high).
Table 20: Output delay A, B, Z
ICHAUS [ IC-HAUS GMBH ]
