MAX1409CAP+

ADCs/DACs - Special Purpose Overview

The MAX1409CAP+ is a low-power, general-purpose multichannel data-acquisition system (DAS) from Analog Devices Inc./Maxim Integrated. It integrates a multiplexed fully differential 16-bit sigma-delta ADC, one 10-bit force/sense DAC, and a real-time clock (RTC). The device operates on a single +2.7V to +3.6V supply, consuming 1.09mA in Run mode and 2.5µA in Sleep mode. It features a buffered 1.25V bandgap reference, SPI/QSPI/MICROWIRE-compatible serial interface, and power-supply voltage monitors. Packaged in a 20-pin SSOP, it supports unipolar/bipolar modes with gains of +1/3, +1, or +2.

ADCs/DACs - Special Purpose Feature Summary

• 16-Bit Sigma-Delta ADC with 30Hz or 60Hz continuous conversion rates
• One 10-bit Force/Sense DAC with monotonic linearity
• Integrated Real-Time Clock (RTC) valid until year 9999
• Single +2.7V to +3.6V supply operation with 2.5µA Sleep mode current

ADCs/DACs - Special Purpose Applications

• Medical Instruments
• Industrial Control Systems
• Portable Equipment
• Data-Acquisition Systems
• Automatic Testing

ADCs/DACs - Special Purpose Procurement Notes

Verify the component matches the specific pinout and feature set of the MAX1409 family, which differs from the MAX1407/1408/1414 variants. Confirm the ordering suffix 'CAP' corresponds to the 20-pin SSOP package and commercial temperature range (+0°C to +70°C). Ensure compatibility with the required serial interface protocol (SPI/QSPI/MICROWIRE) for the target design.

ADCs/DACs - Special Purpose Selection Notes

Select the MAX1409CAP+ when a compact solution with minimal analog inputs is required. This variant provides only one auxiliary analog input and lacks the three-state digital output found in other family members. It is suitable for applications needing a 16-bit ADC and a single DAC within a 20-pin footprint. Verify that the 4:1 input multiplexer meets the channel requirements.

ADCs/DACs - Special Purpose Part Context

The MAX1409 is part of the MAX1407/MAX1408/MAX1409/MAX1414 DAS family. It shares core architecture with the 28-pin variants but is optimized for space-constrained designs via its 20-pin SSOP package. Key distinctions include a reduced 4:1 differential input multiplexer, one auxiliary analog input, and the absence of a programmable three-state digital output compared to the MAX1407/1408/1414.

ADCs/DACs - Special Purpose Replacement Considerations

MAX1407CAI, MAX1408CAI, MAX1414CAI are compatible family members offering more channels or outputs in 28-pin packages.