ICL8052A Datasheet, PDF (7/23 Pages) Intersil Corporation – Precision 4 1/2 Digit, A/D Converter

ICL8052A/ICL71C03, ICL8068A/ICL71C03
4
V_IN
V_REF (+1.000V)
BUFFER
5
2
1µF
C_REF
1
6
-
A1
+
C_STRAY
R_INT
C_INT
INTEGRATOR
-
A2
+
COMPARATOR
-
ZERO
A3
CROSSING
+
DETECTOR
C_AZ
3
FIGURE 2A. PHASE I AUTO-ZERO
4
V_IN
V_REF (+1.000V)
BUFFER
5
2
1µF
C_REF
1
6
-
A1
+
C_STRAY
R_INT
C_INT
INTEGRATOR
-
A2
+
COMPARATOR
-
A3
+
ZERO
CROSSING
DETECTOR
C_AZ
3
FIGURE 2B. PHASE II INTEGRATE INPUT
POLARITY
FF
4
V_IN
V_REF (+1.000V)
BUFFER
5
2
1µF
C_REF
1
6
-
A1
+
C_STRAY
R_INT
C_INT
INTEGRATOR
-
A2
+
COMPARATOR
-
ZERO
A3
CROSSING
+
DETECTOR
C_AZ
3
FIGURE 2C. PHASE III + DEINTEGRATE
POLARITY
FF
4
V_IN
V_REF (+1.000V)
BUFFER
5
2
1µF
C_REF
1
6
-
A1
+
C_STRAY
R_INT
C_INT
INTEGRATOR
-
A2
+
COMPARATOR
-
ZERO
A3
CROSSING
+
DETECTOR
C_AZ
POLARITY
3
FF
FIGURE 2D. PHASE III - DEINTEGRATE
FIGURE 2. ANALOG SECTION OF EITHER ICL8052A OR ICL8068A WITH ICL71C03
7