# AD7278BRMZ

**Analog Devices** · Analog To Digital Converters (ADCs) · MSOP-8

AD7278BRMZ from Analog Devices, in a MSOP-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 | VDD | power_in | Power supply input; the VDD range for the AD7278 is 2.35 V to 3.6 V. |
| 2 | SDATA | output | Serial data out carrying the conversion result MSB first, clocked out on the falling edge of SCLK, with two leading zeros, 8 conversion bits and six trailing zeros for the AD7278. |
| 3 | CS | input | Active-low chip select that initiates conversion on its falling edge and frames the serial data transfer. |
| 4 | NC | unconnected | No connect pin. |
| 5 | NC | unconnected | No connect pin. |
| 6 | SCLK | input | Serial clock logic input that provides the data access clock and the clock source for the conversion process. |
| 7 | GND | power_in | Analog ground reference point for all circuitry; all analog input signals are referred to this GND voltage. |
| 8 | VIN | power_in | Single-ended analog input channel with an input range of 0 V to VDD. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-8 |
| Category | Data Converters |
| 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 |
|---|---|---|---|---|---|---|---|
| VDD to GND | VDD | -0.3 |  | 6 | V |  | 11 |
| Analog Input Voltage to GND |  | -0.3 |  |  | V | Upper limit printed as VDD + 0.3 V | 11 |
| Digital Input Voltage to GND |  | -0.3 |  | 6 | V |  | 11 |
| Digital Output Voltage to GND |  | -0.3 |  |  | V | Upper limit printed as VDD + 0.3 V | 11 |
| Input Current to Any Pin Except Supplies |  | -10 |  | 10 | mA |  | 11 |
| Operating Temperature Range |  | -40 |  | 125 | °C | Commercial (B grade) | 11 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 11 |
| Junction Temperature |  |  |  | 150 | °C |  | 11 |
| Supply voltage VDD | VDD | 2.35 |  | 3.6 | V |  | 1 |
| θJA Thermal Impedance | θJA |  | 205.9 |  | °C/W | 8-Lead MSOP package | 11 |
| θJC Thermal Impedance | θJC |  | 43.74 |  | °C/W | 8-Lead MSOP package | 11 |

## CAD (KiCad official)

- Symbol: `AD7278BRMZ`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ad7278brmz-etched.step` / `ad7278brmz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ad7278brmz.step` / `ad7278brmz.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/AD7276_7277_7278.pdf) (28 pp, sha256 `393a1ddf269a9ce0`, retrieved 2026-10-28, tier: manufacturer)
- **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/ad7278brmz-datasheet.pdf)