component
ADR291GRZ
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Analog Devices Voltage References, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownADR291GRZ
Analog Devices · Voltage References · SOIC-8
ADR291GRZ from Analog Devices, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | NC | unconnected | No connect; the datasheet reserves internal connections at NC pins for manufacturing and says users should not connect anything to them. |
| 2 | VIN | power_in | Input voltage supply; the ADR291 operates from a supply range of 2.8 V to 15 V. |
| 3 | NC | unconnected | No connect; the datasheet reserves internal connections at NC pins for manufacturing and says users should not connect anything to them. |
| 4 | GND | power_in | Ground reference; a bypass capacitor is connected from VOUT to GND in the basic reference configuration. |
| 5 | NC | unconnected | No connect; the datasheet reserves internal connections at NC pins for manufacturing and says users should not connect anything to them. |
| 6 | VOUT | power_out | Reference output voltage of 2.500 V for the ADR291, guaranteed to deliver load currents up to 5 mA. |
| 7 | NC | unconnected | No connect; the datasheet reserves internal connections at NC pins for manufacturing and says users should not connect anything to them. |
| 8 | NC | unconnected | No connect; the datasheet reserves internal connections at NC pins for manufacturing and says users should not connect anything to them. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | SOIC-8 |
| Category | Power Supply Chip |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage | VOUT | 2.494 | 2.5 | 2.506 | V | IOUT = 0 mA | 3 |
| Initial Accuracy | VOERR | -6 | 6 | mV | 3 | ||
| Initial Accuracy | VOERR | -0.24 | 0.24 | % | 3 | ||
| Temperature Coefficient G Grade (TA = -25°C to +85°C) | TCVOUT | 10 | 25 | ppm/°C | 3 | ||
| Line Regulation G Grade (TA = 25°C) | ∆VOUT/∆VIN | 40 | 125 | ppm/V | 3 | ||
| Load Regulation G Grade (TA = 25°C) | ∆VOUT/∆ILOAD | 40 | 125 | ppm/mA | 3 | ||
| Line Regulation G Grade (TA = -25°C to +85°C) | ∆VOUT/∆VIN | 50 | 150 | ppm/V | 3 | ||
| Load Regulation G Grade (TA = -25°C to +85°C) | ∆VOUT/∆ILOAD | 30 | 150 | ppm/mA | 3 | ||
| Temperature Coefficient G Grade (TA = -40°C to +125°C) | TCVOUT | 10 | 30 | ppm/°C | 4 | ||
| Line Regulation G Grade (TA = -40°C to +125°C) | ∆VOUT/∆VIN | 70 | 250 | ppm/V | 4 | ||
| Load Regulation G Grade (TA = -40°C to +125°C) | ∆VOUT/∆ILOAD | 30 | 300 | ppm/mA | 4 | ||
| Supply Current (TA = 25°C) | IS | 9 | 12 | μA | TA = 25°C | 4 | |
| Supply Current (TA = -40°C to +125°C) | IS | 12 | 15 | μA | -40°C ≤ TA ≤ +125°C | 4 | |
| Supply Voltage | VS | 18 | V | 6 | |||
| Storage Temperature Range | TSTG | -65 | 150 | °C | T, R, RU packages | 6 | |
| Operating Temperature Range | TA | -40 | 125 | °C | ADR291/ADR292 | 6 | |
| Junction Temperature Range | TJ | -65 | 125 | °C | T, R, RU packages | 6 | |
| Lead Temperature (Soldering) | 300 | °C | Soldering, 60 sec | 6 | |||
| Supply Voltage Range | VS | 2.8 | 15 | V | ADR291 supply range (Features) | 1 | |
| Noise Voltage | eN | 8 | μV p-p | 0.1 Hz to 10 Hz | 3 | ||
| Wideband Noise Density | eN | 480 | nV/√Hz | @ 1 kHz | 3 | ||
| Long-Term Stability | ∆VOUT | 50 | ppm | After 1000 hours of operation @ 125°C | 3 | ||
| Thermal Hysteresis | VOUT-HYS | 50 | ppm | 8-lead SOIC, 8-lead TSSOP | 4 | ||
| Junction-to-Ambient Thermal Resistance | θJA | 158 | °C/W | 8-Lead SOIC (R), worst-case | 6 | ||
| Junction-to-Case Thermal Resistance | θJC | 43 | °C/W | 8-Lead SOIC (R) | 6 |
CAD (KiCad official)
- Symbol:
ADR291GRZ - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
adr291grz-etched.step/adr291grz-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);adr291grz.step/adr291grz.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (20 pp, sha256
ffe6ab07adedf6a8, retrieved 2026-10-30, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).