|Category||Data Conversion => DAC (Digital to Analog Converters) => Display A/D Converters|
|Title||Display A/D Converters|
|Description||The TC7116A/TC7117A Are 3-1/2 Digit CMOS Analog-to-digital Converters (ADCs)containing All The Active Components Necessary to Construct a 0|
|Company||Microchip Technology, Inc.|
|Datasheet||Download TC7116 datasheet
Low Temperature Drift Internal Reference TC7116/TC7117 80 ppm/°C Typ. TC7116A/TC7117A 20 ppm/°C Typ. Display Hold Function Directly Drives LCD or LED Display Zero Reading with Zero Input Low Noise for Stable Display or 200mV Full Scale Range (FSR) Auto-Zero Cycle Eliminates Need for Zero Adjustment Potentiometer True Polarity Indication for Precision Null Applications Convenient 9V Battery Operation: (TC7116/TC7116A) High Impedance CMOS Differential Inputs: 1012 Low Power Operation: 10mW
The TC7116A/TC7117A are 3-1/2 digit CMOS analogto-digital converters (ADCs) containing all the active components necessary to construct a 0.05% resolution measurement system. Seven-segment decoders, polarity and digit drivers, voltage reference, and clock circuit are integrated on-chip. The TC7116A drives liquid crystal displays (LCDs) and includes a backplane driver. The TC7117A drives common anode light emitting diode (LED) displays directly with an 8mA drive current per segment. These devices incorporate a display hold (HLDR) function. The displayed reading remains indefinitely, as long as HLDR is held high. Conversions continue, but output data display latches are not updated. The reference low input (VREF-) is not available, it is with the TC7106/7107. VREF- is tied internally to analog common in the TC7116A/7117A devices. The TC7116A/7117A 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 15µVP-P noise performance enables a "rock solid" reading. The auto-zero cycle ensures a zero display reading with a 0V input. The TC7116A and TC7117A feature a precision, low drift internal reference, and are functionally identical to the TC7116/TC7117. A low drift external reference is not normally required with the TC7116A/TC7117A.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 CPL IJL CKW CLW Package 40-Pin PDIP 40-Pin CERDIP 44-Pin PQFP 44-Pin PLCC Temperature Range to +70°C
Note = No internal connection. 2: Pins 25, 40 and 56 are connected to the die substrate. The potential at these pins is approximately V+. No external connections should be made.
LCD Display (TC7116/7116A) or Common Anode LED Display 34 (TC7117/7117A) CREF+ CREF- HLDR 31 219 Segment VIN+ 2225 Drive POL 20 30 VINBackplane Drive Minus Sign BP/GND 21 32 ANALOG COMMON 35 28
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