IC-NQC_13 Datasheet, PDF (28/30 Pages) IC-Haus GmbH – Sin/D CONVERTER WITH SIGNAL CALIBRATION

iC-NQC
13-bit Sin/D CONVERTER WITH SIGNAL CALIBRATION
Input Circuit for Sine Encoders (1 Vpp)
Rev D3, Page 28/30
+SINE
R2
1 kÙ
ENCODER
R1
120 Ù
-SINE
R3
1 kÙ
C1
47 pF
R4
5 kÙ
R5
5 kÙ
P-IN
+
-
GAIN = 8
-
N-IN
+
case
C2
470 pF
C3
C4
470 pF 47 nF
VREF
iC-NQx
GNDA
GND
Figure 28: Input circuit for sine encoders (0.8 Vpp to 1.2 Vpp) with 120 Ω termination and low-pass filtering.
R2/R3 serve as protection against ESD and transients, R4/R5 reduce the input signal to suit an
input gain of 8.
Basic Circuit for MR Sensors
Figure 29: Basic circuit for the evaluation of MR bridge sensors.