TC7129

The TC7129 is a 4-1/2 digit analog-to-digital converter (ADC) that directly drives a multiplexed liquid crystal display (LCD).Fabricated in high-performance, low-power CMOS, the TC7129 ADC is designed specifically for high-resolution, battery-powered digital multimeter applications. The traditional dual-slope method of A/D conversion has been enhanced with a successive integration technique to produce readings accurate to better than 0.005% of full scale, and resolution down to 10µV per count. The TC7129 includes features important to multimeter applications. It detects and indicates low-battery condition. A continuity output drives an annunciator on the display, and can be used with an external driver to sound an audible alarm. Overrange and underrange outputs and a range-change input provide the ability to create auto-ranging instruments. For snapshot readings, the TC7129 includes a latch-and-hold input to freeze the present reading. This combination of features makes the TC7129 the ideal choice for full-featured multimeter and digital measurement applications.

Features
  • Count Resolution: ±19,999
  • Resolution on 200 mV Scale: 10 µV
  • True Differential Input and Reference
  • Low Power Consumption: 500 µA at 9V
  • Direct LCD Driver for 4-1/2 Digits
  • Low Battery Indicator, and Continuity Indicator
  • Overrange and Underrange Outputs
  • Range Select Input: 10:1
  • High Common Mode Rejection Ratio: 110 dB
  • External Phase Compensation Not Required
Parameter
Parameter Name Value Value
Supply Voltage (V) 9 9
Power (mW) 4.5 4.5
Resolution (Digits) 4.5 4.5
Resolution (Counts) 20000 20000
Display Type LCD LCD
Temp. Range (°C) 0 to 70 0 to 70
Documents
TC7129 Data SheetData Sheets02/05/2013426KB
Analog & Interface Guide (Volume 2)Brochures10/11/20051067KB
Quick Guide to Microchip Development ToolsBrochures10/15/201411223KB
Analog & Interface Product Selector GuideProduct Line Card03/21/20164116KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
TC7129CKW44MQFP0C to +70CTRAY15.8413.2012.0010.009.23
TC7129CKW71344MQFP0C to +70CT/R15.8413.2012.0010.009.23
TC7129CLW44PLCC0C to +70CTUBE19.3216.1014.6412.2011.26
TC7129CPL40PDIP0C to +70CTUBE14.0411.7010.648.878.18
Similar Devices
ProductDisplay TypeSupply Voltage (V)Resolution (Digits)Price5K
TC7106LCD93.5$2.83
TC7106ALCD93.5$2.80
TC7107LED53.5$2.46
TC7107ALED53.5$2.64
TC7116LCD93.5$3.33
TC7116ALCD93.5$3.56
TC7117LED53$4.75
TC7117ALED53$3.71
TC7126LCD93.5$3.57
TC7126ALCD93.5$4.61
TC7129LCD94.5$7.60
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
TC7129CPL6.50000010.60000040PDIP.600inMatte Tine3
TC7129CLW2.3755003.70370444PLCC-Matte Tine3
TC7129CKW0.4854003.89583344MQFP10x10x2mmMatte Tine3
TC7129CKW7130.4854001.29666744MQFP10x10x2mmMatte Tine3
TC7129 Data Sheet TC7129
Analog & Interface Guide (Volume 2) MCP23S08
Quick Guide to Microchip Development Tools ENC28J60
Analog & Interface Product Selector Guide ENC624J600