Series voltage reference that holds 2.5 V to 0.02% initial accuracy with a 2 ppm/C temperature drift, in a SOIC-8. Low output noise and high stability suit it to driving the reference input of a precision ADC or DAC, where the converter's accuracy is capped by the reference. It takes any supply from a few hundred mV above the output up to 15 V. The 2.5 V member of the ADR45xx family (2.048 V through 5.0 V).

Pinout

Pin	Name	Type	Function
1	NIC	unconnected	Not Internally Connected. This pin is not connected internally; may be tied to any potential or left floating.
2	VIN	power_in	Input Voltage Connection. Operating range 3 V to 15 V. Decouple with a 0.1 µF ceramic capacitor to GND close to the pin.
3	NIC	unconnected	Not Internally Connected. This pin is not connected internally.
4	GND	power_in	Ground return for the device. Connect to the system analog ground with a low-impedance path.
5	NIC	unconnected	Not Internally Connected. This pin is not connected internally.
6	VOUT	power_out	Reference Output Voltage, nominal 2.500 V. Sources up to +10 mA and sinks up to -10 mA. Recommended output capacitor 1 µF (load capacitance range 1 µF to 100 µF).
7	NIC	unconnected	Not Internally Connected. This pin is not connected internally.
8	DNC	unconnected	Do Not Connect. Do not connect to this pin, do not tie to any potential and do not route a trace to it.

Key specifications

Parameter	Value
Type	Series (bandgap) voltage reference
Output	2.5 V
Initial accuracy	+/-0.02% (A grade)
Temp coefficient	2 ppm/C (max)
Output noise	1.25 uV p-p (0.1-10 Hz)
Supply	Output + 0.3 V to 15 V
Package	SOIC-8

Ordering variants

ADR4525ARMZ (MSOP-8)
ADR4525BRZ (SOIC-8)
ADR4525ARZ (SOIC-8)

CAD (KiCad official)

Symbol: Reference_Voltage:ADR4525 (KiCad official)
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Analog Devices datasheet (41 pp, sha256 de2dca59e24477c2, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF