TC7117A-

      Here is the description about TC7116/A/TC7117/TC7117A- of the 3-1/2 Digit Analog-to-Digital Converters with Hold. The TC7116A/TC7117A are 3-1/2 digit CMOS Analog- to-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 back- plane driver. The TC7117A drives common anode Light Emitting Diode (LED) displays directly with an 8mA drive current per segment. 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.
      Here are the features: Low Temperature Drift Internal Reference: - TC7116/TC7117A- 80 ppm/°C, Typ and - 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: - 2V or 200mV Full Scale Range (FSR); Auto-Zero Cycle Eliminates Need for Zero; True Polarity Indication for Precision Null Applications; High-Impedance CMOS Differential Inputs: 1012; Low-Power Operation: 10mW.
      Here are its maximum ratings. Supply Voltage: TC7116/TC7116A (V+ to V-) is 15V. TC7117/TC7117A- (V+ to GND) is +6V. V- to GND is -9V. Reference Input Voltage (Either Input) is V+ to V-. Operating Temperature: C (Commercial) Device is  from 0°C to +70°C and I (Commercial) Device is from 0°C to +70°C. Storage Temperature is from -65°C to +150°C.
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