Precision 2.5V reference for ADC and DAC bias rails
The MAX6133A25+ is a series voltage reference from Analog Devices, delivering a fixed 2.5V output with ±0.06% initial accuracy and a 7ppm/°C temperature coefficient. This level of precision suits it for biasing the reference input of high-resolution ADCs and DACs where the conversion error budget is dominated by the reference drift.
Supply headroom and quiescent budget
The reference itself draws 85µA supply current while sourcing up to 15mA to the load — the quiescent-to-output current ratio means the reference's self-heating is negligible in most signal-chain layouts.
Noise floor for low-level signal chains
Output noise is specified as 16µVp-p (0.1Hz to 10Hz) and 12µVrms (10Hz to 10kHz). For a 16-bit ADC with a 2.5V reference, this noise contribution sits below 1 LSB — the reference does not limit the converter's effective resolution in most precision measurement applications.
Available in an 8-pin MSOP package (3.00mm width, 0.118" pitch), designated as 8-uMAX/uSOP by Analog Devices. The surface-mount footprint is compatible with standard MSOP-8 land patterns. Supplied in tube packaging — suitable for hand assembly or low-volume reflow without tape-and-reel fees.
ROHS3 compliant per.