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參數資料
| 型號： | UTC7106 |
| 廠商： | 友順科技股份有限公司 |
| 元件分類： | 串行ADC |
| 英文描述： | 3/12 DIGIT,LCD DISPLAY A/D CONVERTERS |
| 中文描述： | 3 / 12位數字，液晶顯示器的A / D轉換器 |
| 文件頁數： | 9/15頁 |
| 文件大?。?/td> | 233K |
| 代理商： | UTC7106 |
UTC 7106
CMOS IC
UTC
UNISONIC TECHNOLOGIES CO., LTD.
9
QW-R502-018,B
segments are driven at the same frequency and amplitude and are in phase with BP when OFF, but out of phase
when ON. In all cases negligible DC voltage exists across the segments.
LCD PHASE DRIVER
7
SEGMENT
DECODE
7
SEGMENT
DECODE
7
SEGMENT
DECODE
LATCH
1000 s
COUNTER
,
100 s
COUNTER
,
10 s
COUNTER
,
1 s
COUNTER
,
BACKPLANE
÷
200
LOGIC
CONTROL
÷
4
FROM COMPARATOR OUTPUT
*
THREE INVERTERS ONE INVERTER SHOWN FOR CLARITY
CLOCK
40
39
38
OSC 1
OSC 2
OSC 3
FIGURE 5. DIGITAL SECTION
V
TH
=1V
26
37
6.2V
500
TEST
V-
V+
1
21
TYPICAL SEGMENT OUTPUT
SEGMENT
OUTPUT
2mA
0.5mA
V+
INTERNAL DIGITAL GROUND
INTERNAL
DIGITAL
GROUND
*
a
b
a
b
g
f
e
c
d
a
b
g
f
e
c
d
a
b
g
f
e
c
d
TO SWITCH DRIVERS
SYSTEM TIMING
Figure 6 shows the clocking arrangement used in the UTC 7106. Two basic clocking arrangements can be used:
1. Figure 6A. An external oscillator connected to pin 40.
2. Figure 6B. 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 ~ 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 1/3kHz, etc should be selected. For 50Hz
rejection, Oscillator frequencies of 200kHz, 100kHz, 66 2/3kHz, 50kHz, 40kHz, etc would be suitable. Note that
40kHz (2.5 readings/second) will reject both 50Hz and 60Hz (also 400Hz and 440Hz).
相關PDF資料 |
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| UTC75185 | LINEAR INTEGRATED CIRCUIT |
| UTC75323 | LINEAR INTEGRATED CIRCUIT |
| UTC7642 | ONE CHIP AM RADIO CIRCUIT |
| UTC78D | LINEAR INTEGRATED CIRCUIT |
| UTC78L05M | LINEAR INTEGRATED CIRCUIT |
相關代理商/技術參數 |
參數描述 |
|---|---|
| UTC75185 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:LINEAR INTEGRATED CIRCUIT |
| UTC75323 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:LINEAR INTEGRATED CIRCUIT |
| UTC7642 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:ONE CHIP AM RADIO CIRCUIT |
| UTC78D | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:LINEAR INTEGRATED CIRCUIT |
| UTC78L05L | 制造商:UTC 功能描述: |
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