TSM1285BCSA+

Analog To Digital Converters (ADC) Overview

The TSM1285BCSA+ is a single-supply, single-channel, 12-bit analog-to-digital converter (ADC) manufactured by Silicon Labs. It operates within a voltage range of +2.7V to +3.6V and features an internal track-and-hold circuit and a factory-trimmed +2.5V reference. The device achieves a sampling rate of 300ksps with a conversion time of 3.3μs. Key electrical specifications include a maximum differential nonlinearity (DNL) and integral nonlinearity (INL) of ±1 LSB, a full-power bandwidth of 3 MHz, and a supply current of 2.5mA at maximum speed. It utilizes a 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols.

Analog To Digital Converters (ADC) Feature Summary

• Single-supply operation from +2.7V to +3.6V with low power consumption (2.5mA at 300ksps).
• Integrated high-bandwidth track-and-hold and internal +2.5V reference output.
• High accuracy with DNL and INL specified at ±1 LSB maximum.
• Compatible with standard SPI, QSPI, and MICROWIRE digital interfaces.

Analog To Digital Converters (ADC) Applications

• Process control and factory automation systems.
• Portable data logging equipment.
• Medical instrumentation devices.
• Pen digitizers and tablet computers.
• Battery-powered instruments.

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix 'CSA+' confirms the SOIC-8 package and the 'B' grade indicates the commercial temperature range of 0°C to +70°C. Confirm lead-free packaging status as per manufacturer standards. Check for end-of-life notices or alternative sourcing options if long-term availability is required.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 12-bit resolution and 300ksps sampling rate are sufficient for the application. Ensure the input signal remains within the 0V to VREF range. Verify that the host microcontroller supports the required 3-wire serial interface timing. Consider the TSM1285BE variant if the operating environment requires an extended temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Part Context

The TSM1285BCSA+ serves as an alternate source for the MAX1285 and offers a higher-speed upgrade path compared to the MAX1240 and MAX1241 ADCs. It belongs to the TSM1285 series, which includes variants with different temperature ratings and packaging options, all sharing the same core SAR architecture and performance characteristics.

Analog To Digital Converters (ADC) Replacement Considerations

The datasheet explicitly identifies the TSM1285 as an alternate source for the Maxim Integrated MAX1285. It is also noted as a higher-speed upgrade option relative to the MAX1240 and MAX1241 models. No other substitute part numbers are documented in the provided material.