iC-MQ PROGRAMMABLE 9-BIT
Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
Rev D4, Page 18/39
nel analog signals are available following signal condi- this end at a resolution of 8 the interpolator generates
tioning (PCH0 and NCH0).
a switchpoint every 45 degrees. The objective of the
calibration procedure is a pulse duty cycle of exactly
In mode Calibration 2 the conditioned sine and cosine 50% respectively for A4, B4 und A8, B8. The following
signals are output (PCH1, NCH1, PCH2 and NCH2). settings are required for mode System Test:
In addition intermediate potential VDC1 is provided for
compensating circuit CH1, as is intermediate potential
VDC2 for CH2 (for a description of the calibration pro-
cess, see page 21).
• MODE = 0x0B
• SELRES = 0x1B0
• SELHYS = 0xF
In mode Calibration 3 the internal temperature moni-
toring signals are provided. Calibration of the bias cur-
rent source and temperature monitoring is described
on page 16 and calibration of the zero channel on page
24.
• CFGABZ(7:4) = ’0000’
System Test
TEST 6
Pin
PA
Signal
A4
Description
Offset CH1
The input voltages at pins X3 to X6 can be checked in
mode Test 6. The following settings are required here:
NA
A8
Phase deviation from 90° between
CH1 and CH2
PB
NB
B4
B8
Offset CH2
• GF1 = 0x0
Amplitude deviation between
CH1 and CH2
• GF2 = 0x0
PZ
NZ
ZIn
Digital zero signal, unmasked
• Byte 0x05, bit 3:0 = ’0000’
• Byte 0x0F, bit 3 = ’1’
• Byte 0x0F, bit 4 = ’0’
TP1
Verification of line count (pulses) between
two zero pulses
Low signal: verification running (state after
power on reset)
High signal: verification finished
An error messaging at ERR is valid after the
second zero signal (enable required).
System Test
This mode enables the signal conditioning to be ad-
justed using comparated sine and cosine signals. To
Table 15: Digital Calibration Signals
ICHAUS [ IC-HAUS GMBH ]
