ADC0833 8-Bit Serial I/O A/D Converter with 4-Channel Multiplexer

General Description

The ADC0833 series is an 8-bit successive approximation A/D converter with a serial I/O and configurable input multiplexer with 4 channels. The serial I/O is configured to comply with the NSC MICROWIRETM serial data exchange standard for easy interface to the COPSTM family of processors, as well as with standard shift registers or μPs.

The 4-channel multiplexer is software configured for singleended or differential inputs when channel assigned by a 4- bit serial word.

The differential analog voltage input allows increasing the common-mode rejection and offsetting the analog zero input voltage value. In addition, the voltage reference input can be adjusted to allow encoding any smaller analog voltage span to the full 8 bits of resolution.

Key Specifications

Resolution 8 Bits

Total Unadjusted Error ± 1/2 LSB and ± 1 LSB

Single Supply 5 V_DC

Low Power 23 mW

Conversion Time 32 μs

Features

• NSC MICROWIRE compatible –direct interface to COPS family processors
• Easy interface to all microprocessors, or operates ‘‘stand alone’’
• Works with 2.5V (LM336) voltage reference
• No full-scale or zero adjust required
• Differential analog voltage inputs
• 4-channel analog multiplexer
• Shunt regulator allows operation with high voltage supplies
• 0V to 5V input range with single 5V power supply
• Remote operation with serial digital data link
• TTL/MOS input/output compatible
• 0.3× standard width 14-pin DIP package

Absolute Maximum Ratings (Notes 1 & 2)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.

Current into V+ (Note 3) 15 mA

Supply Voltage, V_CC (Note 3) 6.5V

Voltage

Logic Inputs -0.3V to V_CC + 0.3V

Analog Inputs -0.3V to V_CC + 0.3V

Input Current per Pin (Note 4) ±5 mA

Package Input Current (Note 4) ±20 mA

Storage Temperature -65℃ to a 150℃

Package Dissipation at

T_A - 25℃ (Board Mount) 0.8W

Lead Temperature (Soldering, 10 sec.)

Dual-In-Line Package (Plastic) 260℃

Dual-In-Line Package (Ceramic) 300℃

ESD Susceptibility (Note 5) 2000V

Operating Conditions (Notes 1 & 2)

Supply Voltage, V_CC 4.5 V_DC to 6.3 V_DC

Temperature Range T_MIN≦T_A≦T_MAX

ADC0833CCJ -40℃≦T_A≦85℃

ADC0833BCN, ADC0833CCN 0℃≦T_A≦70℃

Connection and Functional Diagrams

Physical Dimensions inches (millimeters)

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