參數(shù)資料
型號(hào)： ICL7137
廠商： Intersil Corporation
元件分類(lèi)： 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(yè)數(shù)： 9/15頁(yè)
文件大?。?/td> 497K
代理商： ICL7137
9
FN3086.6
July 21, 2005
Digital Section
Figures 6 shows the digital section for the ICL7136. In the
ICL7136, 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 relatively large capacitive
currents when the back plane (BP) voltage is switched. The
BP frequency is the clock frequency divided by 800. For
three readings/second 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.
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.
ICL7136
V+
BP
TEST
DECIMAL
POINT
SELECT
CD4030
GND
V+
TO LCD
DECIMAL
POINTS
FIGURE 5. EXCLUSIVE “OR” GATE FOR DECIMAL POINT DRIVE
FIGURE 6. ICL7136 DIGITAL SECTION
7
SEGMENT
DECODE
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
THREE INVERTERS
ONLY ONE INVERTER SHOWN
FOR CLARITY
SEGMENT
OUTPUT
0.5mA
2mA
INTERNAL DIGITAL GROUND
TYPICAL SEGMENT OUTPUT
V+
c
a
b
c
d
f
g
e
a
b
a
b
c
d
f
g
e
a
b
c
d
f
g
e
ICL7136
相關(guān)PDF資料
PDF描述
ICL7605 HIGH RELIABILITY COMMUTATING AUTO - ZERO ( CAZ ) INSTRUMENTATION AMPLIFIER
ICL7606 HIGH RELIABILITY COMMUTATING AUTO - ZERO ( CAZ ) INSTRUMENTATION AMPLIFIER
ICL7612DCPAZ 1.4MHz, Low Power CMOS Operational Amplifiers
ICL7611DCBAZ 1.4MHz, Low Power CMOS Operational Amplifiers
ICL7611DCBAZ-T 1.4MHz, Low Power CMOS Operational Amplifiers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICL7137C/D 功能描述:顯示驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel
ICL7137CDL 制造商:Rochester Electronics LLC 功能描述:- Bulk
ICL7137CJL 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ICL7137CM44 制造商:Rochester Electronics LLC 功能描述:44 PQFP, 0 + 70, 3 1/2 DIG A/D (LED DRIVE) - Bulk
ICL7137CMH 制造商:Maxim Integrated Products 功能描述:LOW POWER, 3 1/2 DIGIT ADC WITH DIRECT LED DR - Rail/Tube 制造商:Rochester Electronics LLC 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*