參數(shù)資料
型號: ICL7137
廠商: Intersil Corporation
元件分類: 串行ADC
英文描述: 3 1/2 Digit LED, Low Power Display,A/D Converters(3 1/2 位用于低功耗LED的A/D轉(zhuǎn)換器)
中文描述: 低功耗、3 1/2位A/D轉(zhuǎn)換器
文件頁數(shù): 12/15頁
文件大小: 497K
代理商: ICL7137
12
FN3086.6
July 21, 2005
FIGURE 10. ICL7136 USED AS A DIGITAL CENTIGRADE
THERMOMETER
FIGURE 11. CIRCUIT FOR DEVELOPING UNDERRANGE AND
OVERRANGE SIGNAL FROM ICL7136 OUTPUTS
FIGURE 12. AC TO DC CONVERTER WITH ICL7136
28
27
26
25
24
23
22
21
40
39
38
37
36
35
34
33
32
31
30
29
OSC 1
OSC 2
OSC 3
TEST
REF HI
REF LO
C
REF
C
REF
COMMON
IN HI
IN LO
A-Z
BUFF
INT
V
-
G2
C3
A3
G3
BP
50pF
TO PIN 1
0.1
μ
F
0.01
μ
F
100k
1M
200k
470k
9V
390k
0.47
μ
F
TO BACKPLANE
TO DISPLAY
A silicon diode-connected transistor has a temperature coefficient
of about -2mV/
o
C. Calibration is achieved by placing the sensing
transistor in ice water and adjusting the zeroing potentiometer for a
000.0 reading. The sensor should then be placed in boiling water
and the scale-factor potentiometer adjusted for a 100.0 reading.
Value depends on clock frequency.
SCALE
FACTOR
ADJUST
22k
SILICON NPN
MPS 3704 OR
SIMILAR
ZERO
ADJUST
+
-
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
V+
D1
C1
B1
A1
F1
G1
E1
D2
C2
B2
A2
F2
E2
D3
B3
F3
E3
AB4
POL
28
40
39
38
37
36
35
34
33
32
31
30
29
27
26
25
24
23
22
21
OSC 1
OSC 2
OSC 3
TEST
REF HI
REF LO
C
REF
C
REF
COMMON
IN HI
IN LO
A-Z
BUFF
INT
V
-
G2
C3
A3
G3
BP
O /RANGE
U /RANGE
CD4023 OR
74C10
CD4077
TO LOGIC
V
CC
V+
TO
LOGIC
GND
V-
28
40
39
38
37
36
35
34
33
32
31
30
29
27
26
25
24
23
22
21
OSC 1
OSC 2
OSC 3
TEST
REF HI
REF LO
C
REF
C
REF
COMMON
IN HI
IN LO
A-Z
BUFF
INT
V
-
G2
C3
A3
G3
BP
50pF
TO PIN 1
0.1
μ
F
180k
20k
220k
180k
0.047
μ
F
0.47
μ
F
TO BACKPLANE
TO DISPLAY
Test is used as a common-mode reference level to ensure compatibility with most op amps.
10
μ
F
9V
10
μ
F
470k
1
μ
F
4.3k
100pF
(FOR OPTIMUM
BANDWIDTH)
1
μ
F
10k
10k
1N914
1
μ
F
0.22
μ
F
5
μ
F
CA3140
2.2M
+
-
100k
AC IN
SCALE FACTOR ADJUST
(V
REF
= 100mV FOR AC TO RMS)
+
-
ICL7136
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