ADC0805LCN/NOPB

Analog To Digital Converters (ADC) Overview

The ADC0805LCN/NOPB is an 8-bit successive approximation analog-to-digital converter (ADC) manufactured by Texas Instruments. It features a differential potentiometric ladder architecture and operates on a single 5-V supply. The device provides tri-state output latches for direct microprocessor bus interfacing without additional logic. Key specifications include a conversion time of 100 µs, a clock frequency range up to 640 kHz, and a total unadjusted error of ±1 LSB. It utilizes a 20-pin PDIP package with a standard 0.3-inch width.

Analog To Digital Converters (ADC) Feature Summary

• 8-Bit Resolution with Successive Approximation Architecture
• Differential Analog Voltage Inputs for Common-Mode Rejection
• Tri-State Output Latches for Direct Microprocessor Bus Interface
• On-Chip Clock Generator with External RC Timing

Analog To Digital Converters (ADC) Applications

• Interface to Temperature Sensors
• Voltage Source Monitoring
• Transducer Signal Acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'LCN' corresponds to the commercial temperature range (0°C to +70°C) and PDIP package as indicated in the datasheet table. Confirm that the NOPB designation indicates lead-free and RoHS compliance. Ensure the ordering information matches the exact part number variant required for the application's environmental constraints.

Analog To Digital Converters (ADC) Selection Notes

Select the ADC0805LCN/NOPB when an 8-bit resolution with ±1 LSB unadjusted error is sufficient. This model does not require zero adjustment. It is suitable for applications requiring differential inputs and direct connection to 8-bit microprocessors like the 8080 derivatives. Verify that the system can provide the necessary 5V supply and external clock components if using the internal generator.

Analog To Digital Converters (ADC) Part Context

The ADC0805 is part of the ADC080x family, which includes the ADC0801 through ADC0805. These devices share similar architectures but differ in accuracy specifications and reference voltage configurations. The ADC0805 specifically offers ±1 LSB total unadjusted error without requiring a VREF/2 connection, distinguishing it from higher-accuracy variants like the ADC0801 or ADC0803.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements within the same family include ADC0801CCN/NOPB, ADC0802CCN/NOPB, ADC0803CCN/NOPB, and ADC0804CCN/NOPB. Note that these alternatives may have different accuracy specifications (e.g., ±1/4 LSB or ±1/2 LSB) and reference voltage requirements. Ensure the pinout and electrical characteristics are compatible before substitution.