# ADR4540ARZ-R7

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

ADR4540ARZ-R7 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 | Internally not connected; the pin has no internal connection and is labelled NIC in the datasheet. |
| 2 | VIN | power_in | Input voltage connection; for the ADR4540 the specified input range is 4.2 V to 15 V, and the absolute maximum supply rating is 16 V. |
| 3 | NIC | unconnected | Internally not connected; the pin has no internal connection and is labelled NIC in the datasheet. |
| 4 | GND | power_in | Ground reference for the reference output. |
| 5 | NIC | unconnected | Internally not connected; the pin has no internal connection and is labelled NIC in the datasheet. |
| 6 | VOUT | power_out | Voltage reference output; the datasheet states that VOUT should be connected directly to the load for the highest output voltage accuracy, and the ADR4540 nominal output is 4.096 V. |
| 7 | NIC | unconnected | Internally not connected; the pin has no internal connection and is labelled NIC in the datasheet. |
| 8 | DNC | unconnected | Do not connect; this pin must be left unconnected on the PCB. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| 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 (grade A, ±0.04%) | VOUT_ERR | -0.04 |  | 0.04 | % |  | 8 |
| Initial output voltage error (grade A, absolute) | VOUT_ERR |  |  | 1.64 | mV |  | 8 |
| Temperature coefficient, box method (grade A) | TCVOUT |  |  | 4 | ppm/°C | −40°C ≤ TA ≤ +125°C（黑盒法） | 8 |
| Temperature coefficient, bow-tie method (grade A) | TCVOUT |  |  | 8 | ppm/°C | −40°C ≤ TA ≤ +125°C（领结法） | 8 |
| Line regulation | ΔVOUT/ΔVIN |  | 1 | 10 | ppm/V | −40°C ≤ TA ≤ +125°C | 8 |
| Load regulation, source current | ΔVOUT/ΔIL |  | 25 | 80 | ppm/mA | IL = 0 mA至+10 mA源电流，−40°C ≤ TA ≤ +125°C | 8 |
| Load regulation, sink current | ΔVOUT/ΔIL |  | 50 | 120 | ppm/mA | IL = 0 mA至−10 mA吸电流，−40°C ≤ TA ≤ +125°C | 8 |
| Quiescent current | IQ |  | 700 | 950 | μA | −40°C ≤ TA ≤ +125°C，空载 | 8 |
| Dropout voltage, no load | VDO |  |  | 100 | mV | −40°C ≤ TA ≤ +125°C，空载 | 8 |
| Dropout voltage, IL = 2 mA | VDO |  |  | 300 | mV | −40°C ≤ TA ≤ +125°C，IL = 2 mA | 8 |
| Output current capability, sink | IL | -10 |  |  | mA | 吸电流 | 8 |
| Output current capability, source | IL |  |  | 10 | mA | 源电流 | 8 |
| Load capacitance |  | 0.1 |  | 100 | µF |  | 8 |
| Solder heat shift (SHR) change |  | -0.02 |  | 0.02 | % |  | 8 |
| Nominal output voltage | VOUT |  | 4.096 |  | V |  | 8 |
| Output voltage noise, peak-to-peak | eNp-p |  | 2.7 |  | μV p-p | 0.1 Hz至10.0 Hz | 8 |
| Output voltage noise density | eN |  | 83.5 |  | nV/√Hz | 1 kHz | 8 |
| Power supply rejection ratio | RRR |  | 90 |  | dB | fIN = 1 kHz | 8 |
| Output voltage hysteresis, full cycle | ΔVOUT_HYS |  | -13 |  | ppm | +25°C至+125°C至−40°C至+25°C（全循环） | 8 |
| Output voltage hysteresis, half cycle | ΔVOUT_HYS |  | -97 |  | ppm | 25°C至125°C至25°C（半循环） | 8 |
| Output voltage hysteresis, full cycle (0 to 70°C) | ΔVOUT_HYS |  | -8 |  | ppm | 25°C至70°C至0°C至25°C（全循环） | 8 |
| Output voltage hysteresis, half cycle (0 to 70°C) | ΔVOUT_HYS |  | -17 |  | ppm | 25°C至70°C至25°C（半循环） | 8 |
| Long-term drift, early drift | ΔVOUT_LTD |  | 19 |  | ppm | TA = 25°C，250小时（早期漂移） | 8 |
| Long-term drift, 1000 hours | ΔVOUT_LTD |  | 25 |  | ppm | TA = 25°C，1000小时 | 8 |
| Long-term drift, 4500 hours | ΔVOUT_LTD |  | 51 |  | ppm | TA = 25°C，4500小时 | 8 |
| Turn-on settling time | tR |  | 155 |  | µs | COUT = 0.1 µF，CIN = 0.1 µF，RLOAD = 1 kΩ | 8 |
| Input voltage range (part test range) |  | 4.2 |  | 15 | V | VIN test range in ADR4540 table header, unless otherwise noted | 8 |
| Supply voltage |  |  |  | 16 | V |  | 10 |
| Operating temperature range |  | -40 |  | 125 | °C |  | 10 |
| Storage temperature range |  | -65 |  | 150 | °C |  | 10 |
| Junction temperature range |  | -65 |  | 150 | °C |  | 10 |
| ESD, human body model |  |  |  | 6 | kV | HBM | 10 |
| Junction-to-ambient thermal resistance, 2-layer JEDEC board | θJA |  | 120 |  | °C/W | 2层JEDEC板，8引脚SOIC | 10 |
| Junction-to-case thermal resistance | θJC |  | 63 |  | °C/W | θJC，100 µm TIM（1层JEDEC板行） | 10 |

## CAD (KiCad official)

- Symbol: `ADR4540ARZ-R7`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `adr4540arz-r7-etched.step` / `adr4540arz-r7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `adr4540arz-r7.step` / `adr4540arz-r7.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Analog Devices datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588883854162087936) (37 pp, sha256 `48d4d0fe0ae23886`, retrieved 2026-10-19, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/adr4540arz-r7-datasheet.pdf)