MAX1242ACSA

Analog To Digital Converters (ADC) Overview

The MAX1242ACSA+ is a low-power, 10-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +2.7V to +5.25V supply and features an internal 2.5V reference. The device utilizes a successive-approximation register (SAR) architecture with a maximum sampling rate of 73ksps. It includes a fast track/hold circuit with a 1.5µs acquisition time and communicates via a high-speed, 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE standards. Power consumption is 3mW at full speed, with a shutdown mode reducing current to below 10µA. The component is housed in an 8-pin SO package and supports an operating temperature range of 0°C to +70°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrated 2.5V voltage reference for simplified system design
• Low power operation with dedicated shutdown mode
• Fast track/hold circuitry for accurate signal sampling
• Compatible with standard microcontroller serial interfaces

Analog To Digital Converters (ADC) Applications

• Portable data logging systems
• Process control monitoring
• Temperature measurement circuits
• Isolated data acquisition modules

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature grade (0°C to +70°C). Confirm the '+' suffix denotes lead-free/RoHS compliance as per manufacturer documentation. Ensure the ordering code matches the exact pinout and package dimensions required for the target PCB layout. Cross-reference the datasheet revision to confirm electrical characteristics remain unchanged.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a single-channel, 10-bit resolution is sufficient for the application. Choose the MAX1242 variant specifically if an integrated internal reference is desired over an external one. Consider the 73ksps throughput limit against the required sampling rate. Evaluate the 8-pin SO package constraints regarding thermal dissipation and board space availability compared to alternative packages.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX1242/MAX1243 family of low-power serial ADCs. The MAX1242 distinguishes itself from the MAX1243 by including an on-chip 2.5V reference, whereas the MAX1243 requires an external reference source. Both share identical pinouts and performance metrics, allowing for flexible design choices based on reference requirements.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1242BESA+ serves as a direct replacement offering extended temperature range (-40°C to +85°C) with ±1 LSB INL accuracy. The MAX1242AEPA+ provides the same extended temperature range but in an 8-pin PDIP package. Verify that any substitute maintains the 10-bit resolution and 73ksps sampling rate specifications.