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MCP6G01-E/MS датащи(PDF) 24 Page - Microchip Technology

номер детали MCP6G01-E/MS
подробное описание детали  110 關A Selectable Gain Amplifier
PDF  38 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP6G01-E/MS датащи(HTML) 24 Page - Microchip Technology

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MCP6G01/1R/1U/2/3/4
DS22004B-page 24
© 2006 Microchip Technology Inc.
4.8.4
SHIFTED GAIN RANGE SGA
Figure 4-12 shows a circuit using a MCP6271 at a gain
of +10 in front of a MCP6G01. This shifts the overall
gain range to +10 V/V to +500 V/V (from +1 V/V to
+50 V/V).
FIGURE 4-12:
SGA with Higher Gain
Range.
It is also easy to shift the gain range to lower gains (see
Figure 4-13). The MCP6001 acts as a unity gain buffer,
and the resistive voltage divider shifts the gain range
down to +0.1 V/V to +5.0 V/V (from +1 V/V to +50 V/V).
FIGURE 4-13:
SGA with Lower Gain
Range.
4.8.5
ADC DRIVER
This family of SGAs is well suited for driving Analog-to-
Digital Converters (ADC). The gains (1, 10, and 50)
effectively increase the ADC’s input resolution by a
factor of as large as 50 (i.e., by 5.6 bits). This works
well for applications needing relative accuracy more
than absolute accuracy (e.g., power monitoring); see
Figure 4-14.
FIGURE 4-14:
SGA as an ADC Driver.
The low-pass filter in the block diagram reduces the
integrated noise at the MCP6G01’s output and serves
as an anti-aliasing filter. This filter may be designed
using Microchip’s FilterLab® software, available at
www.microchip.com.
VIN
VOUT
MCP6271
MCP6G01
1.11 k
Ω
10.0 k
Ω
VIN
MCP6001
1.11 k
Ω
10.0 k
Ω
VOUT
MCP6G01
OUT
MCP3001
10-bit
ADC
3
MCP6G01
VIN
Low-pass
Filter



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