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AD8218: Zero Drift, Bidirectional Current Shunt Monitor Data Sheet (Rev. B)1/31/2011PDF364 kB
Overview
Features and Benefits
- High common-mode voltage range
-- 4 V to 80 V operating
-- -0.3 V to 85 V survival - Buffered output voltage
- Gain = 20 V/V
- Wide operating temperature range:
−40°C to +125°C - Excellent ac and dc performance
-- ±100 nV/°C typical offset drift
-- ±50 μV typical offset
-- ±5 ppm/°C typical gain drift
-- 110 dB typical CMRR at dc
Product Details
The AD8218 is a high voltage, high resolution current shunt amplifier. It features a set gain of 20 V/V, with a maximum ±0.35% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8218 offers excellent input common-mode rejection from 4 V to 80 V. The AD8218 performs bidirectional current measurements across a shunt resistor in a variety of industrial and telecom applications, including motor control, battery management, and base station power amplifier bias control.
The AD8218 offers breakthrough performance throughout the −40°C to +125°C temperature range. It features a zero-drift core, which leads to a typical offset drift of ±100 nV/°C throughout the operating temperature range and the common-mode voltage range. Special attention is devoted to output linearity being maintained throughout the input differential voltage range of 0 mV to ~250 mV. The AD8218 also includes an internal 80 mV reference that can be enabled for optimal dynamic range in unidirectional current sense applications. The typical input offset voltage is ±50 μV.
The AD8218 is offered in an 8-lead MSOP package.
Applications-
High-side current sensing
- 48V telecom
- Power Management
- Base Stations
- Bidirectional motor control Precision high voltage current sources
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AD8218 SPICE Macro Model
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| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD8218BCPZ-RL | Material Declaration | Reliability Data | 8-Lead LFCSP (3mm x 2mm x 0.75mm) | |
| AD8218BCPZ-WP | Material Declaration | Reliability Data | 8-Lead LFCSP (3mm x 2mm x 0.75mm) | |
| AD8218BRMZ | Material Declaration | Reliability Data | 8-Lead MSOP | |
| AD8218BRMZ-R7 | Material Declaration | Reliability Data | 8-Lead MSOP | |
| Wafer Fabrication Data |
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