Overview
The TLC7135CDWR is a 4 1/2-digit, dual-slope-integrating analog-to-digital converter (ADC) manufactured by Texas Instruments. This device is designed to provide interfaces to both microprocessors and visual displays such as LEDs or LCDs. It utilizes highly efficient CMOS technology, offering high precision and low power consumption. The TLC7135CDWR is characterized for operation from 0°C to 70°C and is suitable for various measurement and data acquisition applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC-28-300mil | - |
| Operating Temperature Range | 0°C to 70°C | °C |
| Supply Voltage (VCC+ with respect to VCC−) | 4 to 6 V | V |
| Reference Voltage Range | VCC− to VCC+ | V |
| Differential Input Voltage | VCC− +1 V to VCC+ -0.5 V | V |
| Maximum Operating Frequency | Up to 2 MHz | Hz |
| Zero Error | < 10 µV | µV |
| Zero Drift | < 0.5 µV/°C | µV/°C |
| Input Current | < 10 pA | pA |
| Rollover Error | ±1 Count Max | - |
Key Features
- 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
Applications
The TLC7135CDWR is suitable for a variety of applications, including:
- Microprocessor-based measurement systems
- Remote data acquisition systems with data transfer through UARTs
- High-accuracy absolute measurements requiring a high-quality reference voltage
- LED or LCD display systems
- Industrial and scientific instrumentation
Q & A
- What is the operating temperature range of the TLC7135CDWR?
The operating temperature range is from 0°C to 70°C.
- What is the typical input current of the TLC7135CDWR?
The typical input current is 1 pA.
- What is the resolution of the TLC7135CDWR?
The resolution is 50 ppm (one part in 20,000) with a maximum linearity error of one count.
- Does the TLC7135CDWR support autoranging?
- How does the TLC7135CDWR interface with microprocessors?
- What is the maximum rollover error of the TLC7135CDWR?
- What type of technology is used in the TLC7135CDWR?
- Can the TLC7135CDWR be used with LED or LCD displays?
- What are the recommended power supplies for the TLC7135CDWR?
- How does the BUSY output signal work in the TLC7135CDWR?
The BUSY output goes high at the beginning of the signal integrate phase and remains high until the first clock pulse after zero crossing or at the end of the measurement cycle when an over-range condition occurs.
