MAX1245BCAP+

Analog To Digital Converters (ADC) Overview

The MAX1245BCAP+ is a 12-bit analog-to-digital converter (ADC) featuring an 8-channel multiplexer and high-bandwidth track/hold circuit. It operates from a single +2.375V to +3.3V supply with a sampling rate of up to 100ksps. The device utilizes a successive-approximation architecture and includes a 4-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols. It supports software-configurable unipolar or bipolar input modes and offers low power consumption, drawing 0.8mA at full speed and 1µA in power-down mode. The component is housed in a 20-pin SSOP package.

Analog To Digital Converters (ADC) Feature Summary

• Integrates an 8-channel analog multiplexer with a high-bandwidth track/hold circuit for efficient multi-point data acquisition.
• Features a flexible 4-wire serial interface that connects directly to standard microprocessor protocols without external logic.
• Supports software-selectable unipolar and bipolar input configurations for versatile signal conditioning applications.
• Provides hardware and software power-down capabilities to minimize current consumption during idle periods.

Analog To Digital Converters (ADC) Applications

• Portable Data Logging Systems
• Medical Instruments
• Battery-Powered Instruments
• Data Acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'BCAP+' against the manufacturer's official documentation to confirm pin compatibility and performance grade. Ensure the ordering information matches the required temperature range and accuracy specifications. Cross-reference the datasheet revision date to validate electrical characteristics before finalizing procurement orders.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a low-power, 12-bit resolution ADC is required for battery-operated systems. Verify that the system voltage falls within the +2.375V to +3.3V operating range. Confirm that the serial interface timing requirements align with the host processor's clock speeds and protocol settings.

Analog To Digital Converters (ADC) Part Context

The MAX1245BCAP+ belongs to the MAX1245 family of low-power, serial 12-bit ADCs manufactured by Analog Devices Inc./Maxim Integrated. This series is designed for applications requiring multiple analog inputs and minimal power usage. The BCAP variant specifically denotes the commercial temperature range and SSOP packaging configuration.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX147 is a pin-compatible alternative for supply voltages ranging from +2.7V to +5.25V. Verify functional equivalence regarding interface compatibility and power requirements before substitution.

Analog To Digital Converters (ADC) FAQ

How does the MAX1245 handle differential input signals?

In differential mode, the device samples the difference between two channels (e.g., CH0/CH1). The return side must remain stable within ±0.5LSB relative to AGND during conversion.

What is the function of the SHDN pin?

The SHDN pin controls the power-down state. Pulling it low reduces supply current to under 10µA, while leaving it open enables the internal clock at 1.5MHz.

Can the MAX1245 operate with an external reference voltage?

Yes, the device uses an external reference applied to the VREF pin to define the full-scale input range for the analog-to-digital conversion.