ADC0804LCWM

Analog To Digital Converters (ADC) Overview

The ADC0804LCWM is a CMOS 8-bit successive approximation analog-to-digital converter (ADC) from the ADC080x series. 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 an 8-bit resolution, a conversion time of 100 µs at a 640 kHz clock frequency, and a total unadjusted error of ±1 LSB. It supports a 0-V to 5-V analog input voltage range and includes an on-chip clock generator.

Analog To Digital Converters (ADC) Feature Summary

• CMOS 8-bit SAR architecture with differential analog inputs
• Compatible with 8080-microprocessor derivatives; no interface logic required
• On-chip clock generator with external RC timing
• Tri-state data outputs for direct bus connection

Analog To Digital Converters (ADC) Applications

• Interface to temperature sensors, voltage sources, and transducers
• General-purpose A/D conversion in 8-bit microprocessor systems
• Stand-alone device operation

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'LCWM' against the manufacturer's current orderable addendum to confirm package type and availability status. Ensure that the operating temperature range (0°C to 70°C) aligns with the system requirements, as other variants in the ADC080x family may support extended industrial temperatures.

Analog To Digital Converters (ADC) Selection Notes

Select this component when an 8-bit resolution and parallel interface are sufficient for the application. The ADC0804LCWM offers a total unadjusted error of ±1 LSB. If higher accuracy is required, consider the ADC0801 or ADC0803 variants which offer ±1/4 LSB and ±1/2 LSB errors respectively. Ensure the analog input signal remains within the GND to VCC + 0.05 VDC range to avoid parasitic diode conduction.

Analog To Digital Converters (ADC) Part Context

The ADC0804LCWM belongs to the ADC080x family, which includes the ADC0801 through ADC0805. These devices share a common functional block diagram and pinout structure but differ in accuracy specifications and reference resistor configurations. The LCWM suffix indicates a Small Outline Package (SOIC) variant manufactured by Texas Instruments.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements within the same family include ADC0801LCWM, ADC0802LCWM, ADC0803LCWM, and ADC0805LCWM. Note that these alternatives have different accuracy specifications (±1/4 LSB, ±1/2 LSB, or ±1 LSB) and internal reference resistor values compared to the ADC0804.