TLC7135 4 1/2 Digit Precision Analog to Digital Converters IC SMD Package

The TLC7135 is a high-precision 4½-digit analog-to-digital converter (ADC) designed by Texas Instruments for applications requiring accurate, stable, and easy-to-read digital measurement of analog signals.

This IC offers true 4½-digit resolution (±19,999 counts) and excellent linearity and stability, making it an ideal choice for digital voltmeters, panel meters, and data acquisition systems. Its dual-slope conversion technique provides superior noise rejection and accuracy, even in electrically noisy environments.

Available in SMD and DIP packages, the TLC7135 combines high performance, low power consumption, and TTL-compatible digital outputs, enabling seamless integration into both analog and digital systems.

• Zero Reading for 0-V Input
• Precision Null Detection With True Polarity at Zero
• 1-pA Typical Input Current
• True Differential Input
• Multiplexed Binary-Coded-Decimal (BCD) Output
• Low Rollover Error: ±1 Count Max
• Control Signals Allow Interfacing With UARTs or Microprocessors
• Autoranging Capability With Over-and Under-Range Signals
• TTL-Compatible Outputs
• Second Source to Teledyne TSC7135, Intersil ICL7135, Maxim ICL7135, and Siliconix Si7135
• CMOS Technology

Display and Output Interface

• Provides Binary-Coded Decimal (BCD) outputs suitable for direct driving of 7-segment displays or microcontroller interfaces.
• Polarity and over-range indications are available for user feedback.
• Latch enable signals simplify direct connection to display driver ICs like 4511 or microcontroller GPIOs.

Applications

• Digital voltmeters (DVMs)
• Digital panel meters
• Analog instrumentation and data loggers
• Battery voltage monitoring systems
• Laboratory test equipment
• Temperature and sensor measurement instruments
• Precision measurement control systems
• Industrial and process control displays