# ADR4550CRZ

**Analog Devices** · Voltage References · SOIC-8

ADR4550CRZ 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 | NIC | unconnected | Not Internally Connected; this pin is not connected internally. |
| 2 | VIN | power_in | Input voltage connection, specified for a supply range of 3 V to 15 V (16 V absolute maximum). |
| 3 | NIC | unconnected | Not Internally Connected; this pin is not connected internally. |
| 4 | GND | power_in | Ground. |
| 5 | NIC | unconnected | Not Internally Connected; this pin is not connected internally. |
| 6 | VOUT | power_out | Output voltage, able to source 10 mA and sink up to 10 mA per the features list. |
| 7 | NIC | unconnected | Not Internally Connected; this pin is not connected internally. |
| 8 | DNC | unconnected | Do Not Connect; do not connect to this pin. |

## 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 |
|---|---|---|---|---|---|---|---|
| Initial Output Voltage Error | VOUT_ERR | -0.02 |  | 0.02 | % | C Grade | 8 |
| Initial Output Voltage Error | VOUT_ERR |  |  | 1 | mV | B, C, D Grade | 8 |
| Solder Heat Resistance Shift |  | -0.02 |  | 0.02 | % | A, B, C, D Grade | 8 |
| Temperature Coefficient (box method) | TCVOUT |  |  | 1 | ppm/°C | C Grade, 0°C ≤ TA ≤ +70°C (box method) | 8 |
| Temperature Coefficient (bowtie method) | TCVOUT |  |  | 2 | ppm/°C | C Grade, 0°C ≤ TA ≤ +70°C (bowtie method) | 8 |
| Line Regulation | ΔVOUT/ΔVIN |  | 1 | 10 | ppm/V | −40°C ≤ TA ≤ +125°C | 8 |
| Load Regulation (source) | ΔVOUT/ΔIL |  | 25 | 80 | ppm/mA | A, B, C Grade, IL = 0 mA to +10 mA source, −40°C ≤ TA ≤ +125°C | 8 |
| Load Regulation (sink) | ΔVOUT/ΔIL |  | 35 | 120 | ppm/mA | A, B, C Grade, IL = 0 mA to −10 mA sink, −40°C ≤ TA ≤ +125°C | 8 |
| Quiescent Current | IQ |  | 700 | 950 | μA | −40°C ≤ TA ≤ +125°C, no load | 8 |
| Dropout Voltage | VDO |  |  | 100 | mV | −40°C ≤ TA ≤ +125°C, no load | 8 |
| Dropout Voltage | VDO |  |  | 300 | mV | −40°C ≤ TA ≤ +125°C, IL = 2 mA | 8 |
| Output Current Capacity, Sinking | IL | -10 |  |  | mA | Sinking | 8 |
| Output Current Capacity, Sourcing | IL | 10 |  |  | mA | Sourcing | 8 |
| Load Capacitance |  | 0.1 |  | 100 | µF |  | 9 |
| Input Voltage Range | VIN | 5.1 |  | 15 | V | IL = 0 mA, TA = 25°C | 8 |
| Operating Temperature Range (C grade) |  | 0 |  | 70 | °C | ADR4550 C and D Grade only | 10 |
| Output Voltage | VOUT |  | 5 |  | V |  | 8 |
| Ripple Rejection Ratio | RRR |  | 90 |  | dB | fIN = 1 kHz | 8 |
| Output Voltage Noise | eNp-p |  | 2.8 |  | μV p-p | 0.1 Hz to 10.0 Hz | 8 |
| Output Voltage Noise Density | eN |  | 95.3 |  | nV/√Hz | 1 kHz | 8 |
| Output Voltage Hysteresis | ΔVOUT_HYS |  | -13 |  | ppm | A, B, C Grade, +25°C to +125°C to −40°C to +25°C (full cycle) | 8 |
| Output Voltage Hysteresis | ΔVOUT_HYS |  | -97 |  | ppm | 25°C to 125°C to 25°C (half cycle) | 9 |
| Output Voltage Hysteresis | ΔVOUT_HYS |  | -8 |  | ppm | 25°C to 70°C to 0°C to 25°C (full cycle) | 9 |
| Output Voltage Hysteresis | ΔVOUT_HYS |  | -17 |  | ppm | 25°C to 70°C to 25°C (half cycle) | 9 |
| Long-Term Drift, 250 hours | ΔVOUT_LTD |  | 19 |  | ppm | A, B, C Grade, TA = 25°C, 250 hours (early life drift) | 9 |
| Long-Term Drift, 1000 hours | ΔVOUT_LTD |  | 25 |  | ppm | A, B, C Grade, TA = 25°C, 1000 hours | 9 |
| Long-Term Drift, 4500 hours | ΔVOUT_LTD |  | 51 |  | ppm | A, B, C Grade, TA = 25°C, 4500 hours | 9 |
| Turn-On Settling Time | tR |  | 160 |  | µs | COUT = 0.1 µF, CIN = 0.1 µF, RLOAD = 1 kΩ | 9 |
| Supply Voltage |  |  |  | 16 | V | TA = 25°C | 10 |
| Operating Temperature Range (C and D grade) |  | 0 |  | 70 | °C | ADR4525, ADR4540, ADR4550 C and D Grade Only | 10 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 10 |
| Junction Temperature Range |  | -65 |  | 150 | °C |  | 10 |
| ESD Human Body Model | HBM |  |  | 6 | kV |  | 10 |
| Thermal Resistance Junction to Ambient, 8-Lead SOIC | θJA |  | 120 |  | °C/W | 2-Layer JEDEC Board | 10 |
| Thermal Resistance Junction to Case, 8-Lead SOIC | θJC |  | 63 |  | °C/W | 1-Layer JEDEC Board | 10 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | abs |  | is packaged in a SOIC plastic package and has a moisture sensi￾tivity level of MSL-1, per the JEDEC standard. However, moisture absorption from the air into the package changes the internal | 38 |

## CAD (KiCad official)

- Symbol: `ADR4550CRZ`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `adr4550crz-etched.step` / `adr4550crz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `adr4550crz.step` / `adr4550crz.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/adr4520_4525_4530_4533_4540_4550.pdf) (41 pp, sha256 `de2dca59e24477c2`, retrieved 2026-10-31, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/adr4550crz-datasheet.pdf)