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參數(shù)資料
| 型號： | TC820CLW |
| 廠商： | Microchip Technology Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 3-3/4 Digit A/D Converter with Frequency Counter and Logic Probe |
| 中文描述： | 3-3/4位A / D轉(zhuǎn)換頻率計數(shù)器和邏輯轉(zhuǎn)換的探討 |
| 文件頁數(shù)： | 2/22頁 |
| 文件大?。?/td> | 275K |
| 代理商： | TC820CLW |
3-150
TELCOM SEMICONDUCTOR, INC.
3-3/4 DIGIT A/D CONVERTER WITH
FREQUENCY AND LOGIC PROBE
TC820
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 instruments
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
Auto-Ranging Frequency Counter
Logic Probe
Decimal Point Drive
Peak Reading Hold
(Frequency or Voltage)
Display Hold
Simple 10:1 Range Change
Buzzer Drive
Low Battery Detection
With Annunciator
Overrange Detection
With Annunciator
Low Drift Reference
Underrange/Overrange
Logic Output
Input Overload Display
LCD Annunciator Driver
LCD Drive Type
LCD Pin Connections
LCD Elements
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
No
No
No
No
Yes
No
Yes
Yes
No
No
"OL"
Yes
"1"
No
Triplexed
15
36
Direct
24
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 design
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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| TC820CPL | 3-3/4 Digit A/D Converter with Frequency Counter and Logic Probe |
| TC820CLW | 3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY COUNTER AND LOGIC PROBE |
| TC820CPL | 3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY COUNTER AND LOGIC PROBE |
| TC820 | 3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY COUNTER AND LOGIC PROBE |
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| TC820CLW713 | 功能描述:LCD 驅(qū)動器 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 |
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