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REF5040IDRG4

REF5040IDRG4 Voltage Reference, 4.096V ±0.05%, 3 ppm/°C

MPNREF5040IDRG4
End of Life

Texas Instruments REF5040IDRG4, series voltage reference, fixed 4.096V output, ±0.05% tolerance, 3 ppm/°C drift, 3µVp-p noise, 10 mA output, -40°C to 125°C, 8-SOIC.

Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

REF5040IDRG4 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeSeries
Voltage - input4.296V ~ 18V
Voltage - output (Min (Fixed))4.096V
Output current10 mA
Current - supply1.2mA
Operating temperature-40°C~125°C(TA)
PackageTape & Reel (TR)
Tolerance±0.05%
Case8-SOIC (0.154\", 3.90mm Width)
Noise - 0.1Hz to 10Hz3µVp-p
Temperature coefficient3ppm/°C

Product details

4.096V fixed reference — the ADC/DAC anchor

The Texas Instruments REF5040IDRG4 is a precision series voltage reference that puts out a fixed 4.096V — a common full-scale voltage for 12-bit and 16-bit ADCs and DACs that simplifies the math (1 LSB = 1 mV for a 12-bit converter). The ±0.05% initial tolerance means you can skip a trim pot in most 12-bit systems and still stay within the accuracy budget.

Noise and drift — the stability story

For a 4.096V reference feeding a 16-bit ADC, 3 µVp-p is about 0.2 LSB of noise, which keeps the noise budget clean without external filtering. Temperature drift is 3 ppm/°C typical.

Input voltage range is 4.296V to 18V, so it runs from a 5V rail with 200 mV headroom or straight off a 12V or 15V supply. The 10 mA output current can bias multiple ADC reference inputs or a small resistive load without a buffer. Quiescent supply current is 1.2 mA typical — low enough that the reference itself does not dominate the power budget in a battery-powered or loop-powered design.

Frequently asked questions

What is the difference between REF5040IDRG4 and REF5040IDR?

The only difference is the packaging suffix: the "G4" in REF5040IDRG4 indicates Tape & Reel packaging, while REF5040IDR typically ships in tubes or other formats. The die, the electrical specs, and the temperature range are identical between the two.

Can REF5040IDRG4 be used as a drop-in replacement for other 4.096V references?

Pin-compatibility depends on the specific reference. The REF5040 uses a standard series-reference pinout (VIN, GND, VOUT, TRIM/NC) in an SOIC-8 package. It is a direct swap for other Texas Instruments REF50xx series parts in the same package, but verify the pinout against any non-TI reference before committing the board.