參數(shù)資料
型號(hào)： TC820CKW
元件分類(lèi)： ADC
英文描述： 1-CH DUAL-SLOPE ADC, PQFP44
封裝： PLASTIC, FP-44
文件頁(yè)數(shù)： 12/24頁(yè)
文件大?。?/td> 185K
代理商： TC820CKW
2
3-3/4 A/D Converter with Frequency
Counter and Logic Probe
TC820
TC820-10 10/17/96
2001 Microchip Technology Inc.
DS21476A
A "peak reading hold" input allows the TC820 to retain
the highest A/D or frequency reading. This feature is useful
in measuring motor starting current, maximum tempera-
ture, and similar applications.
A family of instruments can be created with the TC820.
No additional design effort is required to create instru-
ments with 3-3/4 digit resolution.
The TC820 operates from a single 9V battery, with
typical power of 10 mW. Packages include a 40-pin plastic
DIP, 44-pin plastic flat package, and 44-pin PLCC.
COMPETITIVE EVALUATION
Features Comparison
TC820
7106
3-3/4 Digit Resolution
Yes
No
Auto-Ranging Frequency Counter
Yes
No
Logic Probe
Yes
No
Decimal Point Drive
Yes
No
Peak Reading Hold
Yes
No
(Frequency or Voltage)
Display Hold
Yes
No
Simple 10:1 Range Change
Yes
No
Buzzer Drive
Yes
No
Low Battery Detection
Yes
No
With Annunciator
Overrange Detection
Yes
No
With Annunciator
Low Drift Reference
Yes
No
Underrange/Overrange
Yes
No
Logic Output
Input Overload Display
"OL"
"1"
LCD Annunciator Driver
Yes
No
LCD Drive Type
Triplexed
Direct
LCD Pin Connections
15
24
LCD Elements
36
23
GENERAL DESCRIPTION
The TC820 is a 3-3/4 digit measurement system com-
bining an integrating analog-to-digital converter, frequency
counter, and logic level tester in a single package. The
TC820 supersedes the TC7106 in new designs by improv-
ing performance and reducing system cost. The TC820
adds features that are difficult, expensive, or impossible to
provide with older A/D converters (see the competitive
evaluation). The high level of integration permits TC820-
based instruments to deliver higher performance and more
features, while actually reducing parts count. Fabricated in
low-power CMOS, the TC820 directly drives a 3-3/4 digit
(3999 maximum) LCD.
With a maximum range of 3999 counts, the TC820
provides 10 times greater resolution in the 200mV to 400mV
range than traditional 3-1/2 digit meters. An auto-zero cycle
guarantees a zero reading with a 0V input. CMOS process-
ing reduces analog input bias current to only 1pA. Rollover
error (the difference in readings for equal magnitude but
opposite polarity input signals) is less than
±1 count. Differ-
ential reference inputs permit ratiometric measurements
for ohms or bridge transducer applications.
The TC820's frequency counter option simplifies de-
sign of an instrument well-suited to both analog and digital
troubleshooting: voltage, current, and resistance measure-
ments, plus precise frequency measurements to 4MHz
(higher frequencies can be measured with an external
prescaler), and a simple logic probe. The frequency counter
will automatically adjust its range to match the input fre-
quency, over a four-decade range.
Two logic level measurement inputs permit a TC820-
based meter to function as a logic probe. When combined
with external level shifters, the TC820 will display logic
levels on the LCD and also turn on a piezoelectric buzzer
when the measured logic level is low.
Other TC820 features simplify instrument design and
reduce parts count. On-chip decimal point drivers are in-
cluded, as is a low battery detection annunciator. A piezo-
electric buzzer can be controlled with an external switch or
by the logic probe inputs. Two oscillator options are pro-
vided: A crystal can be used if high accuracy frequency
measurements are desired, or a simple RC option can be
used for low-end instruments.
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參數(shù)描述
TC820CKW713 功能描述:LCD 驅(qū)動(dòng)器 3-3/4 A/D Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
TC820CLW 功能描述:LCD 驅(qū)動(dòng)器 3-3/4 A/D Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
TC820CLW713 功能描述:LCD 驅(qū)動(dòng)器 3-3/4 A/D Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
TC820CPL 功能描述:LCD 驅(qū)動(dòng)器 3-3/4 A/D Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
TC8-20S2405R 制造商:TRUMPOWER 制造商全稱(chēng):Tumbler Technologies + TRUMPower 功能描述:DC/DC CONVERTERS 2:1 Input, 12.5 to 20 Watt
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