MAX157ACPA+

Analog To Digital Converters (ADC) Overview

The MAX157ACPA+ is a low-power, 10-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated. It utilizes a successive-approximation register (SAR) architecture and operates on a single +2.7V to +5.25V supply. The device features two single-ended input channels, an internal track/hold circuit, and an on-chip clock. It supports a maximum sampling rate of 108ksps with a conversion time of 7.4µs. Power consumption is 0.9mA at 108ksps and drops below 0.2µA in shutdown mode. Data is transmitted via a high-speed, 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE standards. It is housed in an 8-pin PDIP package.

Analog To Digital Converters (ADC) Feature Summary

• 10-bit SAR ADC with 108ksps sampling rate
• Single-supply operation (+2.7V to +5.25V)
• Two single-ended analog input channels
• 3-wire serial interface (SPI/QSPI/MICROWIRE compatible)
• Low power: 0.9mA active, <0.2µA shutdown

Analog To Digital Converters (ADC) Applications

• Battery-powered systems
• Portable data logging
• Medical instruments
• Process-control monitoring systems
• Isolated data acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the component status as discontinued or obsolete through official manufacturer channels before procurement planning. Confirm that the 8-PDIP package and 0°C to +70°C temperature range meet system requirements. Ensure external reference voltage specifications are compatible with the design constraints.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring low power consumption and moderate speed. The MAX157 variant provides two single-ended channels, whereas the MAX159 offers one pseudo-differential channel. Ensure the external reference voltage is stable within 1LSB to achieve the specified wake-up time of 2.5µs. Source impedance should be considered for acquisition time calculations.

Analog To Digital Converters (ADC) Part Context

The MAX157ACPA+ belongs to the MAX157/MAX159 family of low-power, serial 10-bit ADCs. It is pin-compatible with the MAX144/MAX145 series, which offer 12-bit upgrades. The 'A' suffix indicates a commercial temperature range of 0°C to +70°C, while 'CPA' denotes an 8-pin plastic DIP package.

Analog To Digital Converters (ADC) Replacement Considerations

Pin-compatible 12-bit upgrades include the MAX144 and MAX145 series. Verify electrical characteristics and software compatibility when migrating from the 10-bit MAX157 to higher-resolution alternatives.