ICL8052 Datasheet, PDF (12/21 Pages) Intersil Corporation – 14-Bit/16-Bit, Microprocessor- Compatible, 2-Chip, A/D Converter

ICL8052/ICL7104, ICL8068/ICL7104
AN
I/P
3
86
97
R_INT
C_INT
BUFFER
-
A1
+
2
INTEGRATOR
-
A2
+
COMP.
-
A3
+
C_AZ
ZERO
CROSS.
DET.
-+
C_REF
4 ^VREF
1
POL
FIGURE 6A. PHASE I AUTO-ZERO
AN
I/P
3
86
97
R_INT
C_INT
BUFFER
-
A1
+
2
INTEGRATOR
-
A2
+
COMP.
-
A3
+
C_AZ
ZERO
CROSS.
DET.
-+
C_REF
+AN
I/P
3
86
97
4 ^VREF
1
POL
FIGURE 6B. PHASE II INTEGRATE INPUT
R_INT
C_INT
BUFFER
-
A1
+
2
INTEGRATOR
-
A2
+
COMP.
-
A3
+
C_AZ
ZERO
CROSS.
DET.
-+
C_REF
4
V_REF
1
POL
FIGURE 6C. PHASE III + DEINTEGRATE
-AN
I/P
3
86
97
R_INT
C_INT
BUFFER
-
A1
+
2
INTEGRATOR
-
A2
+
COMP.
-
A3
+
C_AZ
ZERO
CROSS.
DET.
-+
C_REF
4
V_REF
1
POL
FIGURE 6D. PHASE III DEINTEGRATE
D
Q
ZERO
CROSSING
F/F
CL
CL
D POL Q
F/F
CL
D
Q
ZERO
CROSSING
F/F
CL
CL
POL
PHASE II
D
Q
ZERO
CROSSING
F/F
CL
CL
D
Q
ZERO
CROSSING
F/F
CL
CL
5-17