Precision 4.096V reference for ADC signal chains
The MAX6043AAUT41-T is a series voltage reference from Maxim Integrated, delivering a fixed 4.096V output with ±0.06% initial accuracy and 15ppm/°C temperature coefficient. This combination makes it suitable as the reference for 12-bit successive-approximation ADCs where the reference error budget must stay under 1 LSB across the industrial temperature range. Input voltage spans 6.1V to 40V, allowing the reference to run from an unregulated 12V or 24V rail without a separate preregulator. The series topology draws 650 µA quiescent current and can source up to 10 mA to the load — enough to bias the ADC reference input and its decoupling capacitor simultaneously. For a 12-bit ADC with a 4.096V full-scale range (1 mV/bit), the wideband noise contributes roughly 0.012 LSB rms — negligible in most industrial data-acquisition chains.
Package and temperature grade
Housed in a 6-lead SOT-23 (SOT-23-6, supplier package SOT-6), the part occupies minimal board area and suits space-constrained designs. The device is listed as RoHS non-compliant. Verify whether your application falls under a RoHS exemption (e.g., lead in high-melting-temperature solder) or whether a RoHS-compliant alternative in the same family is required.
No official successor or pin-compatible cross-reference is listed in the manufacturer's documentation. For a second-source option, parametric equivalents from other vendors (e.g., 4.096V, ±0.05% to ±0.1%, SOT-23-6) should be evaluated against the BOM's accuracy and tempco requirements.