admin 发表于 2010-4-17 17:39:06

TC7126/126A Data Sheet

http://www.microchip.com/stellent/images/mchpsiteimages/dwnfolder.gifTC7126/126A Data Sheet


The TC7126A is a 3-1/2 digit CMOS analog-to-digital converter (ADC)containing all the active components necessary to construct a 0.05%resolution measurement system.Seven-segment decoders,digit and polarity drivers, voltage reference,and clock circuit are integrated on-chip. The TC7126A directly drives a liquid crystal display (LCD), and includes a backplane driver. A low-cost,high-resolution indicating meter requires only a display,four resistors,and four capacitors. The TC7126A's extremely low power drain and 9V battery operation make it ideal for portable applications. The TC7126A reduces linearity error to less than 1 count.Roll-over error (the difference in readings for equal magnitude but opposite polarity input signals)is below ±1 count.High-impedance differential inputs offer 1 pA leakage current and a 10 12 Ω input impedance.The 15 µVP-P noise performance guarantees a "rock solid"reading,and the auto-zero cycle guarantees a zero display reading with a 0V input. The TC7126A features a precision, low-drift internal voltage reference an disfunctionally identical to the TC7126. A low-drift external reference is not normally required with the TC7126A.

Parameter NameValue
Supply Voltage (V)9
Power (mW)0.5
Hold FunctionNo
For DMM, DPM, data loggersNo
Resolution (Digits)3.5
Resolution (Counts)2000
Display TypeLCD
Temp. Range (°C)-25 to 85

   Features
- Fast Overrange Recovery, GuaranteedFirst Reading Accuracy
- Low Temperature Drift Internal Reference
   TC7136...............70 ppm/°C Typ.
   TC7136A...............35ppm/°C Typ.
- Guaranteed Zero Reading With Zero Input
- Low Noise: 15 µVP-P
- High Resolution: 0.05%
- Low Input Leakage Current: 1pA Typ. 10pA Max
- Precision Null Detectors With True Polarity at Zero
- High-Impedance Differential Input
- Convenient 9V Battery Operation With Low PowerDissipation: 500Ω
Typ. 900W Max



推荐MICROCHIP全系列产品推广商：（可申请部分免费样片，资料，大家赶快行动吧！）
授权A级代理商;提供技术支持;提供成熟方案;提供免费样品;提供详细资料！
深圳市英锐恩科技有限公司
联系电话: 0755-88845951 82543411传真：0755-82543511
E-mail: enroo@enroo.com
网址: www.enroo.com （”o”为字母）
公司地址: 福田区深南中路嘉汇新城汇商中心1203-1205
专业为客户提供芯片选型指导、技术咨询、开发工具技术支持、产品开发设计等专业的技术服务。
同时为Microchip全系列芯片代理推广商,分销服务商,专业提供Microchip全系列开发工具及技术支持。
页: [1]
查看完整版本: TC7126/126A Data Sheet