AD8218: Zero Drift, Bidirectional Current Shunt Monitor Data Sheet (Rev. B)1/31/2011364 kB
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
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
Markets and Technologies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Tools & Simulations
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|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|
Select a model from the dropdown below to subscribe to PCN/PDN notifications and view past notifications as well.
Support & Discussions
Sample & Buy
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Please see the latest communication from our CCO regarding lead times.
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.