# AD8218BRMZ-R7

**Analog Devices** · Current-Sensing Amplifiers · MSOP-8

AD8218BRMZ-R7 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 | +IN | input | Noninverting input of the shunt amplifier, which also powers the internal LDO from 4 V to 80 V when VS is floating. |
| 2 | VS | power_in | Supply pin, bypass with a standard 0.1 µF capacitor; may be left floating or driven from a low impedance 4 V to 5.5 V supply. |
| 3 | ENB | input | Enable pin; connect to GND to enable the internal 80 mV reference. |
| 4 | GND | power_in | Ground. |
| 5 | OUT | output | Buffered output with gain of 20 V/V, internally clamped to 5.2 V. |
| 6 | NC | unconnected | No connect; do not connect to this pin. |
| 7 | REF | input | Reference input with 1 V/V gain to the output (0 V to 5 V range); connect to a low impedance voltage. |
| 8 | −IN | input | Inverting input of the shunt amplifier. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-8 |
| Category | Amplifiers |
| 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 |
|---|---|---|---|---|---|---|---|
| Gain Accuracy |  | -0.1 |  | 0.1 | % | VO ≥ 0.1 V dc, TA | 3 |
| Gain Accuracy over Temperature |  | -0.35 |  | 0.35 | % | TOPR | 3 |
| Gain vs. Temperature |  | -5 |  | 5 | ppm/°C | TOPR | 3 |
| Offset Voltage (RTI) |  | -200 |  | 200 | µV | 25°C | 3 |
| Offset Voltage over Temperature (RTI) |  | -300 |  | 300 | µV | TOPR | 3 |
| Offset Drift |  | -100 |  | 100 | nV/°C | TOPR | 3 |
| Input Bias Current |  |  |  | 130 | µA | TA, input common mode = 4 V, VS = 4 V | 3 |
| Input Bias Current over Temperature |  |  |  | 220 | µA | TOPR, input common mode = 4 V, VS = 4 V | 3 |
| Common-Mode Input Voltage Range |  | 4 |  | 80 | V | Common-mode continuous | 3 |
| Differential Input Voltage Range |  | 0 |  | 250 | mV | Differential input voltage | 3 |
| Common-Mode Rejection (CMRR) | CMRR | 90 | 110 |  | dB | TOPR | 3 |
| Output Voltage Range Low |  |  |  | 0.01 | V |  | 3 |
| Internal Reference Offset (RTI) |  | -150 |  | 150 | µV | ENB pin connected to GND | 3 |
| Internal Reference Offset Drift (RTO) |  | -10 |  | 10 | µV/°C | VS = NC or VS = 5 V | 3 |
| Reference Input Current |  | 3 |  | 60 | µA | Dependent on VREF/1.5 MΩ | 3 |
| Reference Input Voltage Range |  | 0 |  | 5 | V | ENB not connected to GND | 3 |
| Operating Range (Pin 2 Floating) |  | 4 |  | 80 | V | Power regulated from common mode, VS pin floating | 3 |
| VS Range (Pin 2) | VS | 4 |  | 5.5 | V | VS must be less than 5.5 V if standalone supply is used | 3 |
| Quiescent Current over Temperature | IQ |  |  | 800 | µA | Throughout input common mode | 3 |
| Power Supply Rejection Ratio (PSRR) | PSRR | 90 | 110 |  | dB | TOPR | 3 |
| Temperature Range for Specified Performance |  | -40 |  | 125 | °C |  | 3 |
| Maximum Input Voltage (+IN, −IN to GND) |  | -0.3 |  | 85 | V |  | 4 |
| Differential Input Voltage (+IN to -IN) |  | -5 |  | 5 | V |  | 4 |
| Human Body Model (HBM) ESD Rating |  | -2000 |  | 2000 | V |  | 4 |
| Operating Temperature Range (TOPR) | TOPR | -40 |  | 125 | °C |  | 4 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 4 |
| Gain Initial |  |  | 20 |  | V/V |  | 3 |
| Output Impedance |  |  | 2 |  | Ω |  | 3 |
| Internal Reference Initial Value |  |  | 80 |  | mV | Voltage at OUT with a differential input of 0V and a common-mode input of 4V | 3 |
| Reference Input Impedance |  |  | 1.5 |  | MΩ |  | 3 |
| Reference Input-to-Output Gain |  |  | 1 |  | V/V |  | 3 |
| Small-Signal −3 dB Bandwidth |  |  | 450 |  | kHz |  | 3 |
| Slew Rate |  |  | 1 |  | V/µs |  | 3 |
| Noise 0.1 Hz to 10 Hz (RTI) |  |  | 2.3 |  | µV p-p |  | 3 |
| Noise Spectral Density, 1 kHz (RTI) |  |  | 110 |  | nV/√Hz |  | 3 |

## CAD (KiCad official)

- Symbol: `AD8218BRMZ-R7`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ad8218brmz-r7-etched.step` / `ad8218brmz-r7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ad8218brmz-r7.step` / `ad8218brmz-r7.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/AD8218.pdf) (16 pp, sha256 `3be93bd58c2ec560`, retrieved 2026-10-30, 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/ad8218brmz-r7-datasheet.pdf)