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IC-NQC_11 Datasheet, PDF (17/29 Pages) IC-Haus GmbH – 13-bit Sin/D CONVERTER WITH SIGNAL CALIBRATION | |||
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iC-NQC
preliminary
13-bit Sin/D CONVERTER WITH SIGNAL CALIBRATION
SIGNAL MONITORING and ERROR MESSAGES
Rev D1, Page 17/29
SELAMPL Adr 0x0C, Bit 2
AMPL
Adr 0x0C, Bit 1:0
Max ( |Sin| , |Cos| ) for SELAMPL = 0
Code
Voltage threshold Vth
Output amplitude*
0x00
0.60 x VDDA
1.4 Vpp
0x01
0.64 x VDDA
2.0 Vpp
0x02
0.68 x VDDA
2.6 Vpp
0x03
0.72 x VDDA
Sin2 + Cos2 for SELAMPL = 1
3.1 Vpp
Code
Vthmin â Vthmax
Output amplitude*
0x04
(0.20 â 0.9) x VDDA
1.0 Vpp â 4.5 Vpp
0x05
(0.30 â 0.9) x VDDA
1.5 Vpp â 4.5 Vpp
0x06
(0.40 â 0.9) x VDDA
2.0 Vpp â 4.5 Vpp
0x07
(0.50 â 0.9) x VDDA
2.5 Vpp â 4.5 Vpp
Notes
Vth, Vthmin, Vthmax are typical values; refer to Elec.
Char. No. H01 cf. for maximal values.
*) Entries are calculated with VDDA = 5 V.
Table 24: Signal amplitude monitoring
Vss
Vth
Figure 13: Signal monitoring at minimum amplitude.
Vthmax
Vthmin
Figure 14: Sin2 + Cos2 signal monitoring.
AERR
Code
0x00
0x01
Adr 0x03, Bit 1
Amplitude error message
disabled
enabled
Table 25: Amplitude error
FERR
Code
0x00
0x01
Notes
Adr 0x03, Bit 0
Excessive frequency error message
disabled
enabled
Input frequency monitoring is operational for
resolutions ⥠16
Table 26: Frequency error
Conï¬guration error
-
Always enabled
Table 27: Conï¬guration error
Error Indication at NERR
Failure Mode
Pin signal NERR
No error
HI
Amplitude error LO/HI = 75 % (resp. HI for AERR = 0)
Frequency error LO/HI = 50 % (resp. HI for FERR = 0)
Conï¬guration
LO
Undervoltage
LO
System error
NERR = low caused by an external error
signal
Table 28: Error indication at NERR
Error Messages
Failure Mode
No error
Amplitude error
Frequency error
System error*
Warning**
Notes
*System error
**Warning
Line Signal SLO
Error bits E1, E0
for BiSS and SSI
CRC6 = 0
1, 1
0, 1
1, 0
0, 0
â
Error bits nE, nW
for BiSS and SSI
CRC6 = 1
1, nW
0, nW
0, nW
0, nW
nE, 0
NERR pulled low by external signal
Automatic step-back of resolution
Data output is deactivated and SLO
permanently high in case of: conï¬guration
phase, invalid conï¬guration, undervoltage.
Table 29: Error messages
To enable the diagnosis of faults, the various types
of error are signaled at NERR using a PWM code as
given in the key on the left.
Two error bits are provided to enable communication
via the I/O interface; these bits can decode four differ-
ent types of error. If NERR is held at low by an external
source, such as an error message from the system, for
example, this can also be veriï¬ed via the I/O interface.
Error are stored until the sensor data is output via the
I/O interface and then deleted. Errors at NERR are
displayed for a minimum of ca. 10 ms unless they are
deleted beforehand by a data output.
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