Details, datasheet, quote on part number: TC7107ACPI
PartTC7107ACPI
CategoryData Conversion => DAC (Digital to Analog Converters) => Display A/D Converters
TitleDisplay A/D Converters
DescriptionThe TC7106A And TC7107A 3-1/2 Digit Direct-display Drive Analog-to-digital Converters Allow Existing 7106/7107 Based Systems to be Upgraded
CompanyMicrochip Technology, Inc.
DatasheetDownload TC7107ACPI datasheet
  

 

Features, Applications
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

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 temperature coefficient. This represents to 7 times improvement 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 input impedance. The differential reference input allows ratiometric measurements for ohms or bridge transducer measurements. The 15VPP noise performance ensures a "rock solid" reading. The auto-zero cycle ensures a zero display reading with a zero volts input.

Applications

Thermometry Bridge Readouts: Strain Gauges, Load Cells, Null Detectors Digital Meters: Voltage/Current/Ohms/Power, pH Digital Scales, Process Monitors Portable Instrumentation

Package Code CPI IPL IJL CKW CLW Package 40-Pin PDIP 40-Pin PDIP 40-Pin CERDIP 44-Pin PQFP 44-Pin PLCC Pin Layout Normal Formed Leads Temperature Range to +70C

OSC3 37 TEST 36 VREF+ 35 VREF34 CREF+ 33 CREF32 ANALOG COMMON 31 VIN+ 30 VIN29 CAZ 28 VBUFF 27 VINT G3 21 BP/GND (7106A/7107A) 100's



34 + Analog Input 33 CREF2 POL BP V+ Segment Drive 24k + VREF VREF+ 1k 9V Minus Sign Backplane Drive LCD Display (TC7106/A) or Common Node w/ LED Display (TC7107/A)

VREF- 26 To Analog Common (Pin 32) 3 Conversions/Sec 200mV Full Scale

 

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