IC-MQF_15 Datasheet, PDF (36/38 Pages) IC-Haus GmbH – Sin/Cos INTERPOLATION IC WITH RS422 DRIVER

iC-MQF PROGRAMMABLE 12-BIT ^preliminary
Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
Signal Conditioning Example 2:
Rev C1, Page 36/38
Encoder supplying 100 mVpp to voltage inputs
Step
1.
2.
3.
4.
Operating Mode
Test 5
Test 5
Test 5
Test 5
Test 5
Test 5
System Test
Calibration and Signal
Presets
VOS12= 0x1, GF1= 0x400, OF1= 0x0, GF2= 0x10, OF2= 0x0
Calibration of Channel 1:
Parameter GR12: Adjust the diff. signal at PA vs. NA to approx. 6 Vpp amplitude
Parameter GF1: Adjust the diff. signal at PA vs. NA to exactly 6 Vpp amplitude
Parameter OR1, OF1: Minimize the DC fraction of the diff. signal PA vs. NA (< 5 mVdc)
Calibration of Channel 2:
Parameter GF2: Adjust the diff. signal at PB vs. NB to exactly 6 Vpp amplitude
Parameter OR2, OF2: Minimize the DC fraction of the diff. signal PB vs. NB (< 5 mVdc)
Calibration of Channel 1 vs. Channel 2:
Parameter OF1: Adjust duty ratio of A₄ at PA to 50 %
Parameter OF2: Adjust duty ratio of B₄ at PB to 50 %
Parameter PH12: Adjust duty ratio of A₈ at NA to 50 %
Parameter GF1: Adjust duty ratio of B₈ at NB to 50 %
Table 61: Conditioning example 2
APPLICATION NOTES: CIRCUIT EXAMPLES
Refer to the datasheet of iC-MQ.
DESIGN REVIEW: Notes On Chip Functions
iC-MQF 3
No.
1
Function, Parameter/Code
SELRES, MTD
2
EMASKA, EMASKO, EMASKE
3
END
4
ENZFF
Description and Application Notes
Recommended settings for resolution and minimum transition distance:
STEP 400: t_MTD ≥ 125 ns (MTD 0x4)
STEP 800, 1000: t_MTD ≥ 175 ns (MTD 0x6)
STEP 2000: t_MTD ≥ 200 ns (MTD 0x7)
STEP 4000: t_MTD ≥ 300 ns (MTD 0x8)
Error monitoring is not operational for: temporal tracking error, and loss of tracking;
Mandatory programming:
EMASKO(6) = 0. Allow driver reactivation by toggling bit END.
EMASKO(7) = 0. Do not use driver shutdown for loss of tracking.
EMASKE(6) = 0. Do not use error logging for configuration error.
EMASKE(7) = 0, EMASKE(8) = 0. Do not use error logging for loss of tracking.
Recommended default programming of EEPROM: END = 1
Recommended default programming of EEPROM: ENZFF = 0.
NB: ENZFF = 1 can blank index output if the external gating window is smaller than
the selected AB cycle for indexing (adjusted by CFGZPOS).
Table 62: Chip release iC-MQF_3.