AD8210WYRZ-R7 datasheet(13/15 Pages) AD

Nome de Peças	AD8210WYRZ-R7

Descrição Electrónicos	High Voltage, Bidirectional Current Shunt Monitor

PDF	15 Pages

Scroll/Zoom	100%

Fabricante Electrônico	AD [Analog Devices]

Página de início	http://www.analog.com

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13 / 15 page

Data Sheet

AD8210

Rev. E | Page 13 of 15

INPUT FILTERING

In typical applications, such as motor and solenoid current

sensing, filtering at the input of the AD8210 can be beneficial

in reducing differential noise, as well as transients and current

ripples flowing through the input shunt resistor. An input low-

pass filter can be implemented as shown in Figure 32.

The 3 dB frequency for this filter can be calculated by

FILTER

(1)

Adding outside components, such as RFILTER and CFILTER,

introduces additional errors to the system. To minimize these

errors as much as possible, it is recommended that RFILTER be

10 Ω or lower. By adding the RFILTER in series with the 2 kΩ

internal input resistors of the AD8210, a gain error is

introduced. This can be calculated by













−

FILTER

Error

Gain

kΩ

100

(%)

(2)

AD8210

OUTPUT

G = +20

RSHUNT < RFILTER

CFILTER

RFILTER ≤ 10Ω

+IN

–IN

VREF1

VREF2

GND

VREF

0.1µF

≤ VREF ≤ VS

Figure 32. Input Low-Pass Filtering

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