Precision parametric profile
The MAX6126A41: This is a series voltage reference with a fixed 4.096V output. Initial accuracy is ±0.06%, which translates to a maximum output error of about 2.5 mV at 25°C — tight enough for a 12-bit ADC's full-scale budget without external trimming. Over a 100°C swing, the output shifts by roughly 2 mV — the dominant error term in a precision data-acquisition chain after the initial tolerance. For a 16-bit ADC with a 4.096V reference, this noise contributes less than 0.1 LSB of peak-to-peak uncertainty at the converter's input — it does not limit the effective resolution.
Supply and load margins
Input voltage range is 4.3V to 12.6V, giving 204 mV of headroom above the 4.096V output at the minimum input. Quiescent supply current is 725 µA — the reference's own draw is negligible in a battery-powered system that spends most of its time in sleep, but the 10 mA output limit still governs the load budget.
Available in an 8-MSOP (µMAX) package, 3.00 mm body width. The 0.65 mm pin pitch is standard for this footprint; the exposed pad on the underside (if present on the variant) should be soldered to a quiet ground plane for best thermal and noise performance.