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AD7225LP Folha de dados(PDF) 16 Page - Analog Devices

Nome de Peças AD7225LP
Descrição Electrónicos  LC2MOS Quad 8-Bit DAC with Separate Reference Inputs
PDF  24 Pages
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
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AD7225LP Folha de dados(HTML) 16 Page - Analog Devices

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AD7225
Rev. C | Page 16 of 24
AC REFERENCE SIGNAL
In some applications, it may be desirable to have ac reference
signals. The AD7225 has multiplying capability within the
upper (VDD − 4 V) and lower (2 V) limits of reference voltage
when operated with dual supplies. Therefore, ac signals need to
be ac-coupled and biased up before being applied to the
reference inputs. Figure 19 shows a sine wave signal applied to
VREFA. For input signal frequencies up to 50 kHz, the output
distortion typically remains less than 0.1%. The typical 3 dB
bandwidth figure for small signal inputs is 800 kHz.
*DIGITAL INPUTS OMITTED FOR CLARITY.
VDD
VSS
AGND
DGND
VOUTA
DAC A
AD7225*
VREFA
+15V
+15V
15k
Ω
10k
Ω
+4V
–4V
REFERENCE
INPUT
Figure 19. Applying an AC Signal to the AD7225



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