MAX1271BCAI+

ADCs/DACs - Special Purpose Overview

The MAX1271BCAI+ is a multirange, 12-bit data-acquisition system (DAS) operating from a single +5V supply. It features eight analog input channels with software-selectable ranges: ±VREF, ±VREF/2, 0 to VREF, and 0 to VREF/2. The device provides a throughput rate of 110ksps with a 5MHz bandwidth track/hold. It includes fault protection up to ±16.5V on all inputs. The serial interface supports SPI/QSPI and MICROWIRE protocols. Integral nonlinearity is specified at ±1 LSB for the B grade. The component is housed in a 28-pin SSOP package.

ADCs/DACs - Special Purpose Feature Summary

• Eight analog input channels with independent software-programmable range selection
• 12-bit resolution with 110ksps sampling rate and ±1 LSB INL
• Fault-protected analog inputs tolerant to ±16.5V overvoltage
• Serial interface compatible with SPI, QSPI, and MICROWIRE devices

ADCs/DACs - Special Purpose Applications

• Industrial control systems
• Data-acquisition systems
• Automatic testing equipment
• Medical instruments

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'CAI+' indicates the commercial temperature range (0°C to +70°C) and SSOP-28 packaging as per the datasheet ordering information. Confirm that the 'B' grade designation corresponds to the ±1 LSB integral nonlinearity specification required for the application. Ensure the internal reference or external reference configuration matches the design requirements before procurement.

ADCs/DACs - Special Purpose Selection Notes

Select this model when an 8-channel multiplexed ADC with multirange capability is needed. The MAX1271 variant allows ranges defined by the external reference voltage (±VREF, etc.), unlike the MAX1270 which has fixed voltage ranges. Ensure the system can provide a stable +5V supply within the 4.75V to 5.25V operating window. Consider the 110ksps throughput limit if higher speed is required.

ADCs/DACs - Special Purpose Part Context

This part belongs to the MAX1270/MAX1271 family of multirange, +5V, 8-channel, serial 12-bit ADCs. The MAX1271 differs from the MAX1270 by offering reference-dependent input ranges rather than fixed voltage ranges. The 'C' suffix denotes the commercial temperature range, while 'B' specifies the linearity grade. The 'AI' suffix indicates the 28-pin SSOP package.

ADCs/DACs - Special Purpose Replacement Considerations

The MAX1270BCAI+ is a functional substitute within the same family but offers fixed input ranges (±10V, ±5V, 0 to +10V, 0 to +5V) instead of reference-based ranges. Verify that the fixed ranges meet the signal requirements if substituting.