7107 is a monolithic analog to digital converters (ADCs) with very high input independence and requires absolutely no external display drive circuitry. It can drive a common anode 4 digit 7 segment display directly. It has a resolution of 3+½ bits, which means it can display digital value from 0 to 1999. It uses a dual-slope ADC, so an applied voltage is compared to reference voltage and then approximated to find the applied voltage. These features make it perfect for users who want to display the measured voltage without any MCU and programming. Users simply need to hook up a wire with a 7-segment display with an output of the IC and they will be ready to display the measured voltage. 

The IC has inherent features of versatility and accuracy. The dual-slope ADC technique automatically rejects interference signals and the true differential input and reference are particularly important useful while making ratiometric measurement (ohms and bridge transducers). 

Features

• Guaranteed zero reading for 0V input in all scale
• Can directly drive a 4-digit 7-segment display without any MCU and programming
• Dual slope ADC technique 
• 3+½ bit resolution and can display from 0 to 1999 digital value
• In-built oscillator, clock, and reference
• Low power dissipation
• Highly accurate and versatile
• True polarity at 0 for precise null detection
• Low noise and power dissipation
• Absolutely no additional active circuit is required

Specification

• Voltage supply
  • Single supply: 0 to 6V
  • Dual supply: -15V to +15V
• Current supply: 0.6A to 1.8A
• Input leakage current: 1 to 10 pA
• Common-mode rejection ratio: 50 µV/V
• Noise: 15µV
• Typical rollover error and linearity: ±0.2 counts
• Maximum rollover error and linearity: ±1 counts
• Digital output value: 0 to 1999 
• Typical operating frequency: 48KHz
• Operating and storage temperature range: -65℃ to 150℃

 

 

Application

• Digital voltmeter and ammeter
• Display voltage without MCU and programming
• Instrument panel display