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MCP3909-E/SS датащи(PDF) 28 Page - Microchip Technology

номер детали MCP3909-E/SS
подробное описание детали  Energy Metering IC with SPI Interface and Active Power Pulse Output
PDF  44 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP3909-E/SS датащи(HTML) 28 Page - Microchip Technology

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MCP3909
DS22025C-page 28
 2006-2012 Microchip Technology Inc.
FIGURE 5-5:
Dual Channel Output Mode.
5.6
Filter Input Mode
The filter input mode allows the user to feed the
MCP3909 device an input to the LPF1. Data is
received MSB first. The MCP3909 will treat this data
as if it were the output of the multiplier and will LPF
and D-F the result as normal, giving the resulting out-
put frequency on HFOUT, FOUT0 and FOUT1. See
Tables 4-2 and 4-3 for transfer functions of the output
frequencies.
When using filter input mode, the user must wait for
the data ready flag (DR) to appear on SDO before
attempting to clock in data to the device. The user can
not access either the multiplier output or the dual
channel output while in this mode.
FIGURE 5-6:
Filter Input Mode.
D15 D14 D1
D0
Hi-z
Hi-z
D16
D17
1
215
17 18 31 32
Hi-z
X 32
X 32
16
DR
D30
D31
F1 / SDI
F2 / SCK
NEG / SDO
F0 / CS
X 16
X 16
X 16
X 16
Channel 1
Channel 0
D3 D2
D1 D0
Hi-z
D16
D18 D17
1
23
17 18
19 20
X 20
X 20
4
D19
Hi-z
DR
F1 / SDI
F2 / SCK
NEG / SDO
F0 / CS



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