MAX1285BCSA-T

Analog To Digital Converters (ADC) Overview

The MAX1285BCSA-T is a 12-bit successive-approximation analog-to-digital converter (ADC) designed for single-supply operation. It operates from a +2.7V to +3.6V supply and features an internal track/hold amplifier, a 400ksps sampling rate, and a +2.5V internal reference. The device utilizes a 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols. Key electrical specifications include ±1 LSB maximum differential nonlinearity (DNL) and integral nonlinearity (INL), a full-power bandwidth of 3MHz, and a typical supply current of 2.5mA at 300ksps. It is housed in an 8-pin SO package and supports an operating temperature range of 0°C to +70°C.

Analog To Digital Converters (ADC) Feature Summary

• Single-supply operation optimized for low-voltage battery-powered applications
• Integrated high-bandwidth track/hold amplifier and precision internal voltage reference
• Low power consumption with dedicated shutdown mode for extended battery life
• Direct compatibility with standard microprocessor serial interfaces without external logic

Analog To Digital Converters (ADC) Applications

• Portable data logging systems
• Medical instruments requiring precise signal acquisition
• Battery-powered measurement devices
• Process control monitoring circuits

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing this component. Confirm that the BCSA variant meets the required commercial temperature range for your design environment. Ensure the ordering documentation explicitly references the lead-free/RoHS-compliant status associated with the plus sign in the base part number.

Analog To Digital Converters (ADC) Selection Notes

Select the MAX1285BCSA-T over the MAX1284 series when system power constraints require operation below 4.5V. This model provides the necessary 12-bit resolution and speed for moderate-frequency signal acquisition while minimizing board space through its compact 8-pin form factor. Verify that the input signal range remains within the 0V to 2.5V window defined by the internal reference.

Analog To Digital Converters (ADC) Part Context

This component belongs to the MAX1284/MAX1285 family of serial ADCs, serving as a higher-speed successor to the MAX1240/MAX1241 series. The MAX1285 specifically addresses low-voltage requirements compared to the 5V-only MAX1284. Both share identical pinouts and functional architectures, differing primarily in supply voltage tolerance and maximum clock frequency capabilities.

Analog To Digital Converters (ADC) Replacement Considerations

The MAX1284BCSA+ serves as a pin-compatible alternative if the application can support a +4.5V to +5.5V supply rail. Designers must account for the difference in maximum serial clock frequencies between the two variants during interface timing adjustments.