IC-MQF Datasheet, PDF (36/37 Pages) IC-Haus GmbH – PROGRAMMABLE 12-BIT Sin/Cos INTERPOLATION IC WITH RS422 DRIVER

iC-MQF PROGRAMMABLE 12-BIT ^preliminary
Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
Signal Conditioning Example 2:
Encoder supplying 100 mVpp to voltage inputs
Rev A1, Page 36/37
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: Function Notes
iC-MQF 3
No.
1
Function, Parameter/Code
SELRES, MTD
2
EMASKA, EMASKO, EMASKE
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
Table 62: Notes on chip functions regarding iC-MQF chip release 3.
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