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Analog Devices REF191FS — Discrete Semiconductors

REF191FS Voltage Reference, 2.048V Fixed, 10ppm/°C

MPNREF191FS
End of Life

Analog Devices REF19 series, REF191FS, fixed 2.048V output, ±0.24% tolerance, 10ppm/°C temperature coefficient, 30mA output current, 45µA supply current, 8-SOIC surface-mount package, -40°C to 85°C operating temperature.

$4.05Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSRoHS non-compliant
SeriesREF19
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

REF191FS specifications
ParameterValue
SeriesREF19
Output typeFixed
MountingSurface Mount
Reference typeSeries
Voltage - input18V
Voltage - output (Min (Fixed))2.048V
Output current30 mA
Current - supply45µA
Operating temperature-40°C ~ 85°C (TA)
PackageBulk
Tolerance±0.24%
Case8-SOIC (0.154\", 3.90mm Width)
Noise - 0.1Hz to 10Hz20µVp-p
Temperature coefficient10ppm/°C

Product details

Precision 2.048 V reference for industrial and instrumentation rails

The REF191FS from Analog Devices is a fixed-output series voltage reference delivering 2.048 V with ±0.24% initial accuracy. The series topology means it regulates from an input up to 18 V and can source up to 30 mA to external loads — enough to drive multiple converter reference inputs or a resistive bridge.

RoHS compliance is listed as non-compliant, which matters for designs requiring full RoHS exemption — verify your assembly's exemption allowance if this is a concern.

Frequently asked questions

What are the key differences between REF191FS and REF192FS?

The REF191FS outputs 2.048 V, while the REF192FS outputs 2.5 V. Both share the same REF19 series architecture, 10 ppm/°C drift, 30 mA output, and 8-SOIC package — the choice is driven by the required reference voltage for the ADC or DAC range.