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參數(shù)資料
| 型號： | HI7133CPL |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | ADC |
| 英文描述： | Power Resistor; Series:200; Resistance:4.5kohm; Resistance Tolerance: 5%; Power Rating:8W; Resistor Element Material:Ceramic; Temperature Coefficient:260 ppm; Leaded Process Compatible:No; Packaging:Bulk RoHS Compliant: No |
| 中文描述： | DUAL-SLOPE ADC, PARALLEL ACCESS, PDIP40 |
| 文件頁數(shù)： | 10/21頁 |
| 文件大?。?/td> | 209K |
| 代理商： | HI7133CPL |
3-1835
HI7131/33 vs ICL7136/37
Figure 5 shows the analog front end block diagram of both
HI7131/33 and ICL7136/37. The difference is the common
reference voltage generator connection and 2 extra analog
switches in the ICL7136. The HI7131 architecture uses the
INLO as the reference point of the integrator (non-inverting
input of the integrator amplifier) in all the phases of the con-
version cycle. The ICL7136 uses INLO as a reference point
only during integration cycle and COMMON pin is used as
the integrator reference point during auto-zero, deintegrate,
and zero integrate phases.
The circuit configuration of the HI7131 results in a superior
120dB rejection of DC common mode on the inputs. How-
ever, the HI7131 has reduced AC common mode noise
rejection, since the noise on the INLO input can cause errors
during the deintegration phase.
The circuit configuration of the ICL7136 is unaffected by the
AC noise riding on the inputs, but the DC common mode
rejection on the input is only 86dB.
FIGURE 93A. HI7131 AND HI7133 ANALOG SECTION FUNCTIONAL DIAGRAM
FIGURE 93B.
ICL7136 AND ICL7137 ANALOG SECTION FUNCTIONAL DIAGRAM
FIGURE 93. HI7131, HI7133 vs ICL7136, ICL7137 ANALOG SECTIONS
DE-
DE+
V
COMMON
GENERATOR
POLARITY
FLIP-FLOP
ZERO
CROSSING
DETECTOR
V
-
26
C
INT
C
AZ
R
INT
BUFF
A-Z
INT
V+
AZ
COMPARATOR
INHI
COMMON
INLO
31
32
30
DE-
DE+
INT
AZ
34
C
REF
+
36
REFHI
C
REF
REFLO
35
AZ AND
ZI
AZ AND
ZI
ZI
INPUT HIGH
33
C
REF
-
28
29
27
V +
TO
DIGITAL
SECTION
V -
INTEGRATOR
1
-
+
-
+
-
+
DE-
DE+
V
COMMON
GENERATOR
POLARITY
FLIP-FLOP
ZERO
CROSSING
DETECTOR
V -
26
C
INT
C
AZ
R
INT
BUFF
A-Z
INT
V+
-
+
AZ
COMPARATOR
INHI
COMMON
INLO
31
32
30
DE-
DE+
INT
AZ
34
C
REF
+
36
REFHI
C
REF
REFLO
35
AZ AND
ZI
AZ AND
ZI
ZI
INPUT HIGH
33
C
REF
-
28
29
27
V +
TO
DIGITAL
SECTION
AZ AND DE
±
AND ZI
V -
INTEGRATOR
1
-
+
-
+
HI7131, HI7133
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