IC-MSA Datasheet, PDF (28/29 Pages) IC-Haus GmbH – SIN/COS SIGNAL CONDITIONER with AGC and 1Vpp DRIVER

iC-MSA SIN/COS SIGNAL
preliminary
CONDITIONER with AGC and 1Vpp DRIVER
Rev A1, Page 28/29
Motor feedback encoder with iC-MSA, iC-MSB and single EEPROM
In this application iC-MSB is fed with typically 2048 CPR sine and cosine signals, and an index signal. A constant
signal level is achieved by controlling the sensor’s LED current. iC-MSA is utilized to provide C/D commutation
signals, typically with 1 CPR, at a constant amplitude. At higher rotation speed the sine/cosine amplifier cut-off-
frequency is exceeded and iC-MSB increases the LED current. In order to keep the low frequency signals of C/D
constant, iC-MSA automatically reduces the gain.
iC-MSA and iC-MSB are multi-master I²C capable and feature non-overlapping configuration register addresses.
Thus, both devices can share a single EEPROM providing individual configuration data.
C3
100nF
R6
R5
2.2k
2.2k
VP
SCL
24xx
VN^SDA
Disc
iC-TL85
R9
D3
47
C7
100nF
iC-PD3948
VCC
DPZ
DPC
VREF
PZ
NZ
VRSC
VRDC
DPSIN
DNC
DPCOS
DND
DNSIN
DPD
PSIN
NSIN
PCOS
DNCOS
NCOS
PC
NC
PD
ND
DNZ
GND
C2
C1
100nF
1μF
R1
1k
SCL
VDDS
VDD
D2
SDA ^I2C
Reverse
ERR
Polarity
Protection
iC-MSB
X4 ₊
PS
X6 -
NS
X3 ₊
PC
X5 _-
X1 ₊
NC
X2 _-
PZ
SIGNAL
ACO LEVEL
NZ
CONTROL
GNDS
GND
C6
100nF
SCL
VDDS
VDD
I2C
SDA
Reverse
Polarity
Protection
iC-MSA
X4 ₊
X6 _-
X3 ₊
X5 _-
X1 ₊
X2 _-
C5
C4
100nF
1μF
ERR
PS
NS
PC
NC
PZ
AUTOMATIC
GAIN
NZ
CONTROL
GNDS
GND
+5V
ERR
PSIN
NSIN
PCOS
NCOS
PZ
NZ
VN
TVS-Diode-Array
PC
NC
PD
ND
Figure 9: Example circuit with iC-MSA, iC-MSB and single EEPROM.
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