IC-MQF_15 Datasheet, PDF (21/38 Pages) IC-Haus GmbH – Sin/Cos INTERPOLATION IC WITH RS422 DRIVER

iC-MQF PROGRAMMABLE 12-BIT ^preliminary
Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
Rev C1, Page 21/38
Signal Path Multiplexer
The Pins X2 to X6 are assigned to the internal channels
CH1 and CH2 according to Table 18, the signals for
index channel CH0 are always connected to the pins
X1 and X2.
MUX(6:0)
Adr 0x03, bit 6:0
Code
Function
MUX(2:0)
Adr 0x03, bit 2:0
any
Fixed assignment
0
Differential input configuration
2
Single crossing
3
Double crossing
4
Single-ended input configuration
7
Single crossing
MUX(3)
Adr 0x03, bit 3
0
Default assignment
1
Index signal inversion
MUX(5:4)
Adr 0x03, bit 5:4
0
Default assignment
2
X2 Output function:
internal VREF_in is output to X2
3
X2 Reference function:
external VREFex supplies X2 and
replaces internal VREFin
MUX(6:0)
Adr 0x03, bit 6:0
Code
Function
Default assignment
0x40
TEST 6 (MODE = 0x6)
OpAmp bypass function
Notes re. MUX(6:0)
PCH0i
X1
NCH0i
X2
PCH1i
X4
→ PCH0o → NCH0o
→ NCH0o → PCH0o
X2
VREF_in →X2
X2←VREFex
NCH1i
X6
X5
X3
X2
X2
PCH2i
X3
X3
X5
X3
X5
NCH2i
X5
X6
X6
X2
X2
Pin PZ
X1
Pin NZ
X2
Pin PA
PCH1o
X4
Pin NA
NCH1o
X6
Pin PB
PCH2o
X3
Pin NB
NCH2o
X5
Settings which are not explicitly specified may lead to an undesired chip function.
Table 18: Input Multiplexer Function, Input Signal Mode, and Reference Selection
5V
VDDS= 4.25 V
4V
VDDS= 4.25 V
VCM 3.75 V
3V
+IN
2V
-IN
VIN 250 mV max.
1V
2.75 V
VCM 2.625 V
VCM 1.125 V
1V
V-Mode 1:1
VREFin 1.5 V or 2.5 V
+IN
VCM
-IN
VIN 1 V max.
VCM 0.75 V
GNDS 0.25 V
V-Mode 4:1
VREFin 1.5 V
NB: VREFin is referenced to GNDS.
Figure 5: Permissible common mode range and maximum input signal for lowest gain (GR12 = 0x0,
GF1, GF2 = 0x00); left side: voltage input 1:1, right side: voltage input 4:1.