Precision 5V anchor for ADC/DAC reference rails
The MAX6126B50+ is a series voltage reference from Analog Devices that delivers a fixed 5V output with ±0.1% initial accuracy and an ultra-low 2.85µVp-p noise from 0.1Hz to 10Hz. This noise floor is low enough to preserve the effective number of bits in a 16-bit SAR ADC without additional filtering — the reference's own noise contribution sits well below the ADC's quantization noise. The 12ppm/°C temperature coefficient means the output drifts less than 1 mV over a 100°C swing, so a precision measurement system holds its calibration across the full industrial temperature range without a trim pot in the reference path.
Supply headroom and load capability
The input voltage range spans 5.2V to 12.6V, giving the designer flexibility to run this reference from a 5.5V regulated rail or a 12V unregulated bus. The 10 mA output current is sufficient to bias the reference input of a single ADC or DAC plus a small resistive divider — but if the load exceeds 10 mA, a buffer amplifier must be inserted between the reference and the load. Quiescent supply current is 725 µA typical, which matters for battery-powered instruments where every microamp counts. The series topology means the load current is drawn from the input, not the output — the reference's own dissipation stays low even at full output current.
Delivery is in Tube format, not tape and reel. If your pick-and-place line requires reel packaging, factor in a tube-to-reel transfer step or confirm with your assembler that tube-fed parts are acceptable for the feeder bank.
Active lifecycle and sourcing posture
No lead-free process change is required for reflow soldering.