MAX1400CAI+

Analog To Digital Converters (ADC) Overview

The MAX1400CAI+ is an 18-bit, low-power, multichannel oversampling sigma-delta analog-to-digital converter (ADC) designed for +5V operation. It achieves true 16-bit accuracy with no missing codes at output data rates up to 480 samples per second. The device features three fully differential input channels and two additional calibration channels, configurable as five pseudo-differential inputs. It supports programmable gain from +1V/V to +128V/V and includes an internal offset DAC for DC compensation. Operating within a commercial temperature range of 0°C to +70°C, it utilizes a SPI-compatible 3-wire serial interface and is housed in a 28-pin SSOP package.

Analog To Digital Converters (ADC) Feature Summary

• Sigma-delta architecture providing high-resolution conversion with selectable decimation factors
• Multichannel input configuration supporting three fully differential or five pseudo-differential signal paths
• Integrated programmable gain amplifier and offset compensation capabilities
• Low-power design optimized for portable industrial instruments and loop-powered systems

Analog To Digital Converters (ADC) Applications

• Portable Industrial Instruments
• Portable Weigh Scales
• Pressure Transducers

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'CAI+' corresponds to the commercial temperature grade (0°C to +70°C) and 28-pin SSOP package. Confirm that the ordering information matches the manufacturer's current datasheet revision, as older documentation may list 'MAX1400CAI' without the plus sign. Ensure compatibility with +5V analog supply requirements.

Analog To Digital Converters (ADC) Selection Notes

Select this component when system requirements demand high resolution (16-bit noise-free) with moderate speed (up to 480sps). It is suitable for applications requiring multiple differential inputs with programmable gain. Consider the +5V analog supply constraint and the need for external reference voltage if utilizing the differential reference inputs.

Analog To Digital Converters (ADC) Part Context

The MAX1400 belongs to Maxim Integrated's family of high-precision, low-power sigma-delta ADCs. The CAI variant specifically denotes the commercial temperature range extension compared to the EAI version which supports -40°C to +85°C. This part is distinct from the MAX14001 series, which offers isolation and different input architectures.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1400EAI+ serves as the extended temperature range equivalent within the same package and pinout. For higher throughput requirements, the MAX1403 provides similar functionality but operates at lower power consumption with different clocking characteristics.