ADC0816 8-Bit Analog-to-Digital Converter with 16-Channel Multiplexer

Overview

The ADC0816 is a monolithic CMOS data acquisition component that integrates an 8-bit analog-to-digital converter (ADC), a 16-channel multiplexer, and microprocessor-compatible control logic. This device is designed for applications requiring high-performance analog signal acquisition and conversion. The ADC0816 employs successive approximation as its conversion technique, ensuring accurate and efficient analog-to-digital conversion.

The converter includes a high-impedance chopper-stabilized comparator, a 256R voltage divider with an analog switch tree, and a successive approximation register. The integrated 16-channel multiplexer allows direct access to any of 16 single-ended analog signals, with additional logic for channel expansion. The ADC0816 simplifies signal conditioning by providing direct access to both the multiplexer output and the ADC input, eliminating the need for external zero and full-scale adjustments.

Features

• 8-Bit Resolution: Provides accurate digital representation of analog signals.
• 16-Channel Multiplexer: Supports up to 16 single-ended analog inputs.
• Successive Approximation Conversion: Ensures fast and precise analog-to-digital conversion.
• High-Impedance Chopper-Stabilized Comparator: Reduces offset errors and improves accuracy.
• 256R Voltage Divider with Analog Switch Tree: Enhances linearity and reduces distortion.
• Microprocessor-Compatible Control Logic: Simplifies interfacing with microcontrollers and processors.
• No External Zero or Full-Scale Adjustments Required: Reduces external component count and simplifies calibration.
• Direct Access to Multiplexer Output and ADC Input: Facilitates signal conditioning and system integration.
• Wide Operating Voltage Range: Compatible with standard power supply configurations.

Applications

The ADC0816 is suitable for a wide range of applications requiring analog signal acquisition and conversion, including:

• Data Acquisition Systems: Used in industrial and laboratory environments for monitoring and logging analog signals.
• Process Control: Integrates into control systems for real-time analog signal processing.
• Instrumentation: Provides accurate analog measurements in test and measurement equipment.
• Automotive Systems: Supports sensor interfacing and signal conditioning in automotive electronics.
• Medical Devices: Used in medical instrumentation for precise analog signal conversion.
• Consumer Electronics: Enables analog input processing in audio and video equipment.
• Communication Systems: Facilitates signal processing in telecommunication devices.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_CC): -0.3V to +18V
• Analog Input Voltage Range: -0.3V to V_CC + 0.3V
• Digital Input Voltage Range: -0.3V to V_CC + 0.3V
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (V_CC): +4.5V to +6.0V
• Analog Input Voltage Range: 0V to V_CC
• Clock Frequency: 10kHz to 1280kHz
• Conversion Time: 100µs (typical at 640kHz clock frequency)

Performance Characteristics

• Resolution: 8 bits
• Integral Nonlinearity (INL): ±1 LSB (max)
• Differential Nonlinearity (DNL): ±1 LSB (max)
• Signal-to-Noise Ratio (SNR): 48dB (typical)
• Total Harmonic Distortion (THD): -56dB (typical)
• Power Consumption: 15mW (typical at 5V supply)

Package Information

The ADC0816 is available in a 28-pin dual in-line package (DIP) and a 28-lead plastic leaded chip carrier (PLCC). The package dimensions and pin configurations are as follows:

28-Pin DIP Package

• Package Dimensions: 36.32mm x 13.97mm (1.43" x 0.55")
• Pin Pitch: 2.54mm (0.1")
• Lead Material: Copper alloy
• Lead Finish: Tin-lead or RoHS-compliant alternative

28-Lead PLCC Package

• Package Dimensions: 11.43mm x 11.43mm (0.45" x 0.45")
• Lead Pitch: 1.27mm (0.05")
• Lead Material: Copper alloy
• Lead Finish: Tin-lead or RoHS-compliant alternative

Pin Configuration

The ADC0816 pinout includes the following key pins:

• IN0-IN15: Analog input channels
• V_REF: Reference voltage input
• V_CC: Power supply input
• GND: Ground reference
• START: Conversion start control
• EOC: End-of-conversion output
• OE: Output enable
• DB0-DB7: Digital output bus
• ALE: Address latch enable
• ADD A, B, C, D: Multiplexer address inputs

Conclusion

The ADC0816 is a versatile and high-performance 8-bit analog-to-digital converter with an integrated 16-channel multiplexer, making it ideal for a wide range of data acquisition and signal processing applications. Its microprocessor-compatible interface, high accuracy, and ease of use make it a preferred choice for designers seeking reliable analog-to-digital conversion solutions. With no need for external adjustments and robust electrical characteristics, the ADC0816 simplifies system design while delivering consistent performance.