MAX1243AESA

Analog To Digital Converters (ADC) Overview

The MAX1243AESA+ 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 a 7.5µs successive-approximation conversion time with a fast track/hold of 1.5µs. The device utilizes an external reference voltage at the REF pin, accepting signals from 0V to VREF. It includes an on-chip clock and communicates via a high-speed, 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE standards. Power consumption is 3mW at maximum sampling speed of 73ksps, with a shutdown mode reducing current to 2µA. It is housed in an 8-pin SO package.

Analog To Digital Converters (ADC) Feature Summary

• Requires external reference voltage input for analog-to-digital conversion
• Features a 3-wire serial interface compatible with standard microcontroller I/O ports
• Includes internal track/hold circuitry for signal acquisition
• Operates within a wide single-supply voltage range

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 'A' indicates the commercial temperature range (0°C to +70°C) as documented in the ordering information. Confirm the '+' suffix denotes lead-free/RoHS compliance. Ensure the external reference circuit meets the minimum impedance and load current requirements specified in the datasheet for accurate operation.

Analog To Digital Converters (ADC) Selection Notes

Select the MAX1243 over the MAX1242 when an external reference voltage is preferred or required for system flexibility. Verify that the external reference can supply up to 250µA during conversion. Consider the 10-bit resolution and 73ksps throughput against application bandwidth needs. Ensure the serial interface timing aligns with the microcontroller's capabilities.

Analog To Digital Converters (ADC) Part Context

The MAX1243 is part of the MAX1242/MAX1243 family of low-power, 10-bit serial ADCs. It shares the same pinout and core architecture as the MAX1242 but differs in reference configuration. The MAX1242 integrates a 2.5V reference, while the MAX1243 requires an external one. Both devices are available in 8-pin PDIP and SO packages.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1242 is pin-compatible but contains an internal reference; verify if external reference usage is mandatory. The MAX1240 and MAX1241 are 12-bit upgrades that are pin-compatible. Check if the increased resolution and potential power differences suit the design requirements.