MAX191AEWG+

Analog To Digital Converters (ADC) Overview

The MAX191AEWG+ is a monolithic, CMOS, 12-bit analog-to-digital converter (ADC) featuring differential inputs, a track/hold circuit, an internal voltage reference, and power-down capability. It operates from a single +5V or dual ±5V supply and supports parallel or serial microprocessor interfaces. The device guarantees a 100ksps sampling rate with a 7.5µs conversion time and 2µs acquisition time. Key electrical specifications include ±1/2 LSB integral nonlinearity for the 'A' grade, 3mA operating current, and 20µA power-down current. It is housed in a 24-pin Wide SO package and functions within a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• 12-Bit Resolution with ±1/2 LSB Integral Nonlinearity
• Internal Voltage Reference with Gain Error Trimming via REFADJ Pin
• Flexible Interface: Two 8-bit Parallel Modes and SPI/QSPI/Microwire Compatible Serial Mode
• Low Power Consumption: 3mA Active, 20µA Power-Down

Analog To Digital Converters (ADC) Applications

• Battery-Powered Data Logging Systems
• PC Pen Digitizers
• High-Accuracy Process Control Equipment
• Data-Acquisition Boards for Personal Computers
• Automatic Testing Systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix EWG confirms the 24-pin Wide SO package and -40°C to +85°C temperature range. Confirm the 'A' designation indicates ±1/2 LSB INL performance. Check for RoHS compliance status associated with the '+' suffix. Ensure the source document matches the specific part number MAX191AEWG+ to avoid confusion with other package variants like BCNG or AMRG.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution at 100ksps is required with low power constraints. The internal reference simplifies design by reducing external components, though an external reference can be used via the VREF pin. Choose the 'A' grade version if tighter linearity specifications (±1/2 LSB INL) are necessary compared to the 'B' grade (±1 LSB). Ensure the system interface supports either parallel data bus access or serial clocking protocols.

Analog To Digital Converters (ADC) Part Context

The MAX191AEWG+ belongs to the MAX191 family of low-power, 12-bit sampling ADCs. This family includes variants with different packages (Narrow DIP, Wide SO, CERDIP) and temperature ranges (Commercial, Extended, Military). The AEWG suffix specifically denotes the Extended temperature range (-40°C to +85°C), Wide SO package, and 'A' grade linearity performance within the Maxim Integrated product portfolio.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements must match the 12-bit resolution, 100ksps rate, and 24-pin Wide SO package. Consider the MAX191ACWG+ for commercial temperature range applications or MAX191AMRG/883B for military-grade ceramic DIP requirements. Verify that substitute parts support the same parallel/serial interface modes and power supply configurations.