MAX1101CWG

Analog To Digital Converters (ADC) Overview

The MAX1101CWG is a single-chip, 8-bit analog-to-digital converter (ADC) designed for digitizing linear CCD array outputs. It integrates a programmable-gain amplifier (PGA), a three-input multiplexer, and clamp circuitry for black-level correction or correlated double sampling (CDS). The device operates with a sample rate up to 1MHz and features an 8-bit serial interface. Electrical characteristics include a maximum PGA gain of -10 and a minimum of -2, with 64 adjustable steps. The part functions within a +4.75V to +5.25V supply range and is rated for commercial temperatures from 0°C to +70°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 8-bit ADC with half-flash conversion technique
• Built-in clamp circuitry for black-level correction or CDS
• 6-bit PGA with gain settings from -2 to -10 in 64 steps
• Three-input multiplexer selecting between CCDIN, AIN1, and AIN2

Analog To Digital Converters (ADC) Applications

• Scanners
• Fax Machines
• Digital Copiers
• CCD Imaging Systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix CWG corresponds to the 24-pin Wide SO package and the 0°C to +70°C temperature range. Confirm that the ordering information matches the manufacturer's current datasheet revision, as legacy Maxim Integrated products may have updated documentation or packaging details.

Analog To Digital Converters (ADC) Selection Notes

Select this component when interfacing directly with monochrome CCD sensors requiring on-chip signal conditioning. Ensure the application supports a 5V logic interface and utilizes the serial data line for both configuration and output. Verify that the required sample rate does not exceed 1MHz and that the external capacitor values for CEXT align with the chosen CDS or black-level compensation mode.

Analog To Digital Converters (ADC) Part Context

The MAX1101 belongs to the Maxim Integrated family of CCD digitizers. It consolidates analog front-end functions typically handled by discrete components into a single 24-pin SO package. This integration reduces board space and simplifies the design of imaging systems by providing dedicated clamp and PGA stages optimized for CCD video signals.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate alternative solutions based on pin compatibility, resolution requirements, and integrated peripheral availability.

Analog To Digital Converters (ADC) FAQ

How is the PGA gain adjusted?

The PGA gain is set via a 6-bit control word shifted into the device through the DATA pin while MODE is low. Gain ranges from -2 to -10 in increments of -0.125 across 64 steps.

What is the recommended value for CEXT in CDS applications?

For Correlated Double Sampling (CDS), the recommended value for the external capacitor CEXT is 4nF to minimize errors from switch resistance and charge injection.

How does the device handle data input and output?

The DATA pin is bidirectional. When MODE is low, data is shifted in to configure the mux and PGA. When MODE is high, the 8-bit ADC result is shifted out synchronously with the SCLK rising edge.