MAX156ACWI

Analog To Digital Converters (ADC) Overview

The MAX156ACWI+ is an 8-bit, 4-channel analog-to-digital converter (ADC) featuring simultaneous track-and-hold inputs and a 2.5V internal reference. It operates from a single +5V supply or dual ±5V supplies, supporting unipolar and bipolar input ranges in both single-ended and differential configurations. The device utilizes a successive approximation architecture with a conversion time of 3.6µs per channel. Data is stored in an internal 8x8 RAM and accessed via a bidirectional parallel interface. The component is housed in a 28-pin wide SO package and supports an operating temperature range of 0°C to +70°C.

Analog To Digital Converters (ADC) Feature Summary

• Simultaneous sampling across all channels eliminates timing skew between input samples.
• Integrated 2.5V voltage reference reduces external component count.
• Internal 8x8 RAM stores conversion results for sequential access.
• Flexible configuration allows mixed single-ended and differential input setups.

Analog To Digital Converters (ADC) Applications

• Phase-sensitive data acquisition systems
• Vibration analysis and waveform monitoring
• DSP analog front-end interfaces
• Portable data logging equipment

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature grade (0°C to +70°C). Confirm the '+'' denotes RoHS compliance. Ensure the package matches the 28-pin wide SO specification. Cross-reference the manufacturer's latest datasheet for any pinout revisions or obsolescence notices before finalizing procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this model when four analog channels require simultaneous sampling without inter-channel delay. Choose the MAX156 over the MAX155 if only four inputs are needed to reduce pin count or cost. Verify that the required resolution is 8 bits and that the 250 kS/s aggregate throughput meets system bandwidth requirements. Consider the internal reference stability if high precision is critical.

Analog To Digital Converters (ADC) Part Context

This component belongs to the MAX155/MAX156 family of high-speed multichannel ADCs. The MAX156 variant specifically provides four analog input channels, whereas the MAX155 offers eight. Both share identical core architectures, including the SAR converter, simultaneous T/Hs, and internal reference. The ACWI+ designation specifies the commercial temperature range and surface-mount packaging.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitutes include the MAX155AEWI+ and MAX156BEWI+. Note that the MAX155 has eight channels while the MAX156 has four; verify channel count compatibility. Check accuracy grades, as 'A' variants typically offer tighter linearity specifications than 'B' variants. Ensure the replacement maintains the same 28-pin wide SO package footprint.