MAX155ACPI+

Analog To Digital Converters (ADC) Overview

The MAX155ACPI+ is an 8-bit, 8-channel analog-to-digital converter (ADC) featuring simultaneous track-and-hold inputs. It operates from a single +5V supply or dual ±5V supplies, supporting unipolar and bipolar input ranges. The device includes an internal 2.5V reference and stores conversion results in an 8x8 RAM. Key electrical parameters include a 3.6µs conversion time per channel, 4MHz small-signal bandwidth, and 20ns aperture delay. Logic inputs operate with VIL of 0.8V and VIH of 2.4V. Power consumption is 18mA to 24mA at +5V. The component is housed in a 28-pin PDIP package.

Analog To Digital Converters (ADC) Feature Summary

• Eight simultaneously sampling track-and-hold inputs eliminate timing differences between channel samples.
• Internal 2.5V voltage reference reduces external component count.
• Bidirectional interface allows flexible configuration for single-ended or differential conversions.
• Power-down capability significantly reduces current drain while retaining register data.

Analog To Digital Converters (ADC) Applications

• Phase-sensitive data acquisition systems
• Vibration and waveform analysis equipment
• DSP analog input interfaces
• AC power meters
• Portable data loggers

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature range (0°C to +70°C). Confirm the 'P' suffix corresponds to the PDIP package type. Ensure the '+T' designation aligns with tape-and-reel requirements if applicable, though standard ordering may vary by distributor. Cross-reference the manufacturer's discontinuation status before finalizing procurement plans.

Analog To Digital Converters (ADC) Selection Notes

Select this component when simultaneous multi-channel sampling is required without external multiplexing latency. The internal reference simplifies board layout compared to external reference designs. Consider the 8-bit resolution and 3.6µs conversion speed against application requirements. Evaluate source impedance constraints, as high impedance requires longer acquisition times exceeding the minimum 800ns specification.

Analog To Digital Converters (ADC) Part Context

This part belongs to the MAX155/MAX156 family of high-speed ADCs. The MAX155 variant provides eight analog channels, whereas the MAX156 offers four. Both share identical core architecture, including the simultaneous track-and-hold circuitry and internal reference. The MAX155ACPI+ specifically denotes the 8-channel version in a PDIP package with commercial temperature rating.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Analog Devices/Maxim Integrated for recommended products or related parts lists found on official manufacturer resources.