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參數(shù)資料
| 型號： | ICL7107 |
| 廠商： | Intersil Corporation |
| 元件分類： | 串行ADC |
| 英文描述： | LED Display, A/D Converters(3 1/2 位LED 顯示器驅動 A/D轉換器) |
| 中文描述： | 3 1/2位A/D轉換器 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 534K |
| 代理商： | ICL7107 |
8
FN3082.8
Digital Section
Figures 7 and 8 show the digital section for the ICL7106 and
ICL7107, respectively. In the ICL7106, an internal digital
ground is generated from a 6V Zener diode and a large
P-Channel source follower. This supply is made stiff to
absorb the relative large capacitive currents when the back
plane (BP) voltage is switched. The BP frequency is the
clock frequency divided by 800. For three readings/sec., this
is a 60Hz square wave with a nominal amplitude of 5V. The
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.
Figure 8 is the Digital Section of the ICL7107. It is identical to
the ICL7106 except that the regulated supply and back plane
drive have been eliminated and the segment drive has been
increased from 2mA to 8mA, typical for instrument size
common anode LED displays. Since the 1000 output (pin 19)
must sink current from two LED segments, it has twice the
drive capability or 16mA.
In both devices, the polarity indication is “on” for negative
analog inputs. If IN LO and IN HI are reversed, this indication
can be reversed also, if desired.
ICL7106
V+
BP
TEST
DECIMAL
POINT
SELECT
CD4030
GND
V+
TO LCD
DECIMAL
POINTS
FIGURE 6. EXCLUSIVE ‘OR’ GATE FOR DECIMAL POINT DRIVE
7
SEGMENT
DECODE
SEGMENT
OUTPUT
0.5mA
2mA
INTERNAL DIGITAL GROUND
TYPICAL SEGMENT OUTPUT
V+
LCD PHASE DRIVER
LATCH
7
SEGMENT
DECODE
÷
200
LOGIC CONTROL
INTERNAL
DIGITAL
GROUND
V
TH
= 1V
7
SEGMENT
DECODE
1000’s
COUNTER
100’s
10’s
1’s
TO SWITCH DRIVERS
FROM COMPARATOR OUTPUT
÷
4
CLOCK
40
39
38
OSC 1
OSC 2
OSC 3
BACKPLANE
21
V+
TEST
V-
500
37
26
6.2V
COUNTER
COUNTER
COUNTER
1
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 7. ICL7106 DIGITAL SECTION
ICL7106, ICL7107, ICL7107S
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ICL7107C/D | 功能描述:顯示驅動器和控制器 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 |
| ICL7107CJL | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ICL7107CM44 | 功能描述:IC ADC 3.5 DIGIT LED 44-MQFP RoHS:否 類別:集成電路 (IC) >> PMIC - 顯示器驅動器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 顯示器類型:真空熒光 (VF) 配置:5 x 7（矩陣） 接口:串行 數(shù)字或字符:- 電流 - 電源:3.5mA 電源電壓:2.7 V ~ 3.6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.154"，3.90mm 寬） 供應商設備封裝:16-QSOP 包裝:帶卷 (TR) |
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