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參數(shù)資料
| 型號： | ICL7106S |
| 廠商： | Intersil Corporation |
| 元件分類： | 串行ADC |
| 英文描述： | LCDDisplay, A/D Converters(3 1/2 位驅(qū)動LCD顯示器的A/D轉(zhuǎn)換器) |
| 中文描述： | LCDDisplay，A / D轉(zhuǎn)換（3 1 / 2位驅(qū)動液晶顯示器的的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 534K |
| 代理商： | ICL7106S |
9
FN3082.8
System Timing
Figure 9 shows the clocking arrangement used in the
ICL7106 and ICL7107. Two basic clocking arrangements
can be used:
1. Figure 9A. An external oscillator connected to pin 40.
2. Figure 9B. An R-C oscillator using all three pins.
The oscillator frequency is divided by four before it clocks the
decade counters. It is then further divided to form the three
convert-cycle phases. These are signal integrate (1000
counts), reference de-integrate (0 to 2000 counts) and
auto-zero (1000 to 3000 counts). For signals less than full
scale, auto-zero gets the unused portion of reference
de-integrate. This makes a complete measure cycle of 4,000
counts (16,000 clock pulses) independent of input voltage.
For three readings/second, an oscillator frequency of 48kHz
would be used.
To achieve maximum rejection of 60Hz pickup, the signal
integrate cycle should be a multiple of 60Hz. Oscillator
frequencies of 240kHz, 120kHz, 80kHz, 60kHz, 48kHz,
40kHz, 33
1
/
3
kHz, etc. should be selected. For 50Hz
rejection, Oscillator frequencies of 200kHz, 100kHz,
66
2
/
3
kHz, 50kHz, 40kHz, etc. would be suitable. Note that
40kHz (2.5 readings/second) will reject both 50Hz and 60Hz
(also 400Hz and 440Hz).
7
SEGMENT
DECODE
TO
SEGMENT
0.5mA
8mA
DIGITAL GROUND
TYPICAL SEGMENT OUTPUT
V+
LATCH
7
SEGMENT
DECODE
LOGIC CONTROL
7
SEGMENT
DECODE
1000’s
COUNTER
100’s
10’s
1’s
TO SWITCH DRIVERS
FROM COMPARATOR OUTPUT
DIGITAL
GROUND
÷
4
CLOCK
40
39
38
OSC 1
OSC 2
OSC 3
V+
TEST
500
COUNTER
COUNTER
COUNTER
1
V+
37
27
c
a
b
c
d
f
g
e
a
b
a
b
c
d
f
g
e
a
b
c
d
f
g
e
THREE INVERTERS
ONE INVERTER SHOWN FOR CLARITY
FIGURE 8. ICL7107 DIGITAL SECTION
CLOCK
INTERNAL TO PART
40
39
38
GND ICL7107
TEST ICL7106
÷
4
CLOCK
INTERNAL TO PART
40
39
38
÷
4
RC OSCILLATOR
R
C
FIGURE 9B.
FIGURE 9. CLOCK CIRCUITS
FIGURE 9A.
ICL7106, ICL7107, ICL7107S
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|---|---|
| ICL7106 | LCD Display, A/D Converters(3 1/2 位驅(qū)動LCD顯示器的A/D轉(zhuǎn)換器) |
| ICL7107 | LED Display, A/D Converters(3 1/2 位LED 顯示器驅(qū)動 A/D轉(zhuǎn)換器) |
| ICL7109IJL | 12 Bit A/D Converter With 3-State Binary Outputs |
| ICL7109CPL | Dual LVDS Receiver 5-SOT-23 -40 to 85 |
| ICL7109MJL | Dual LVDS Receiver 8-SOIC -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICL7106SCPL | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Harris Corporation 功能描述: |
| ICL7107 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:3 Digit, LCD/LED Display, A/D Converters |
| ICL7107C/D | 功能描述:顯示驅(qū)動器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| ICL7107CDL | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ICL7107CIL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
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