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TC7107ACLW 데이터시트(PDF) 1 Page - Microchip Technology

부품명 TC7107ACLW
상세설명  3-1/2 Digit Analog-to-Digital Converters
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
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© 2002 Microchip Technology Inc.
DS21455B-page 1
TC7106/A/TC7107/A
Features
• Internal Reference with Low Temperature Drift
- TC7106/7: 80ppm/°C Typical
- TC7106A/7A: 20ppm/°C Typical
• Drives LCD (TC7106) or LED (TC7107)
Display Directly
• Zero Reading with Zero Input
• Low Noise for Stable Display
• Auto-Zero Cycle Eliminates Need for Zero
Adjustment
• True Polarity Indication for Precision Null
Applications
• Convenient 9V Battery Operation (TC7106A)
• High Impedance CMOS Differential Inputs: 1012
• Differential Reference Inputs Simplify Ratiometric
Measurements
• Low Power Operation: 10mW
Applications
• Thermometry
• Bridge Readouts: Strain Gauges, Load Cells, Null
Detectors
• Digital Meters: Voltage/Current/Ohms/Power, pH
• Digital Scales, Process Monitors
• Portable Instrumentation
Device Selection Table
General Description
The TC7106A and TC7107A 3-1/2 digit direct display
drive analog-to-digital converters allow existing 7106/
7107 based systems to be upgraded. Each device has
a precision reference with a 20ppm/°C max tempera-
ture coefficient. This represents a 4 to 7 times improve-
ment over similar 3-1/2 digit converters. Existing 7106
and 7107 based systems may be upgraded without
changing external passive component values. The
TC7107A drives common anode light emitting diode
(LED) displays directly with 8mA per segment. A low
cost, high resolution indicating meter requires only a
display,
four
resistors,
and
four
capacitors.The
TC7106A low power drain and 9V battery operation
make it suitable for portable applications.
The TC7106A/TC7107A reduces linearity error to less
than 1 count. Rollover error – the difference in readings
for equal magnitude, but opposite polarity input signals,
is below ±1 count. High impedance differential inputs
offer 1pA leakage current and a 1012
Ω input imped-
ance. The differential reference input allows ratiometric
measurements for ohms or bridge transducer mea-
surements. The 15
µVP–P noise performance ensures a
“rock solid” reading. The auto-zero cycle ensures a
zero display reading with a zero volts input.
Package
Code
Package
Pin Layout
Temperature
Range
CPI
40-Pin PDIP
Normal
0
°Cto +70°C
IPL
40-Pin PDIP
Normal
-25
°Cto +85°C
IJL
40-Pin CERDIP
Normal
-25
°Cto +85°C
CKW
44-Pin PQFP
Formed Leads
0
°Cto +70°C
CLW
44-Pin PLCC
0
°Cto +70°C
3-1/2 Digit Analog-to-Digital Converters


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