MICROCHIP TC7107ACPL

The TC7106A and TC7107A 3-1/2 digit direct display drive Analog-to-Digital Converters allow existing TC7106/TC7107 based systems to be upgraded. Each device has a precision reference with a 20 ppm/°C maximum temperature coefficient. This represents a 4 to 7 times improvement over similar 3-1/2 digit converters. Existing TC7106 and TC7107 based systems may be upgraded without changing external passive component values. The TC7107A drives common anode light emitting diode (LED) displays directly with 8 mA 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 1 pA leakage current and a 10^12 Ω input impedance. The differential reference input allows ratiometric measurements for ohms or bridge transducer measurements. The 15 μV_P-P noise performance ensures a “rock solid" reading. The autozero cycle ensures a zero display reading with a zero volts input.

• Internal Reference with Low Temperature Drift: - TC7106/TC7107: 80 ppm/°C (Typical) - TC7106A/TC7107A: 20 ppm/°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: 10^12 Ω
• Differential Reference Inputs Simplify Ratiometric Measurements
• Low-Power Operation: 10 mW

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