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MCP48CMB21 数据表(PDF) 76 Page - Microchip Technology

部件名 MCP48CMB21
功能描述  8/10/12-Bit Digital-to-Analog Converters, 1 LSb INL Single/Dual Voltage Outputs with SPI Interface
PDF  106 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

MCP48CMB21 数据表(HTML) 76 Page - Microchip Technology

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MCP48CXBXX
DS20006160A-page 76
 2019 Microchip Technology Inc.
8.1.2
LAYOUT CONSIDERATIONS
Several layout considerations may be applicable to
your application. These may include:
• Noise
• PCB Area Requirements
8.1.2.1
Noise
Inductively-coupled AC transients and digital switching
noise can degrade the input and output signal integrity,
potentially masking the MCP48CXBXX’s performance.
Careful board layout minimizes these effects and
increases the Signal-to-Noise Ratio (SNR). Multilayer
boards utilizing a low-inductance ground plane,
isolated inputs, isolated outputs and proper decoupling
are critical to achieving the performance that the silicon
is
capable
of
providing.
Particularly
harsh
environments may require shielding of critical signals.
Separate digital and analog ground planes are
recommended. In this case, the VSS pin and the ground
pins of the VDD capacitors must be terminated to the
analog ground plane.
8.1.2.2
PCB Area Requirements
In some applications, PCB area is a criteria for device
selection. Table 8-1 shows the typical package
dimensions and area for the different package options.
Note:
Breadboards and wire-wrapped boards
are not recommended.
TABLE 8-1:
PACKAGE FOOTPRINT(1)
Package
Package Footprint
Type
Code
Dimensions
(mm)
Area (mm2)
Length Width
10 MSOP
UN
3.00
4.90
14.70
10 DFN
MF
3.00
3.00
9.00
16 QFN
MG
3.00
3.00
9.00
Note 1: Does not include recommended land
pattern dimensions. Dimensions are
typical values.



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