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| 型号： | TMPSNS-RTD1 |
| 厂商： | Microchip Technology |
| 文件页数： | 26/43页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL PT100 RTD TEMP SENSOR |
| 标准包装： | 1 |
| 传感器类型： | 温度 |
| 接口： | USB |
| 嵌入式： | 是，MCU，8 位 |
| 已供物品： | 板，缆线，CD |
| 已用 IC / 零件： | MCP3301，MCP6S26，PIC18F2550 |
| 产品目录页面： | 672 (CN2011-ZH PDF) |
| 相关产品： | MCP3301T-BI/SN-ND - IC ADC 13BIT 2.7V 1CH SPI 8-SOIC MCP3301-BI/SN-ND - IC ADC 13BIT 2.7V SPI 8-SOIC MCP3301T-CI/SN-ND - IC ADC 13BIT 2.7V 1CH SPI 8-SOIC MCP3301T-BI/MS-ND - IC ADC 13BIT 2.7V 1CH SPI 8-MSOP MCP3301T-CI/MS-ND - IC ADC 13BIT 2.7V 1CH SPI 8-MSOP MCP3301-BI/P-ND - IC ADC 13BIT 2.7V SPI 8-DIP MCP3301-BI/MS-ND - IC ADC 13BIT 2.7V SPI 8-MSOP MCP3301-CI/SN-ND - IC ADC 13BIT 2.7V 1CH SPI 8SOIC MCP3301-CI/P-ND - IC ADC 13BIT 2.7V 1CH SPI 8-DIP MCP3301-CI/MS-ND - IC ADC 13BIT 2.7V 1CH SPI 8-MSOP |
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MCP6S21/2/6/8
6.4
6.4.1
Typical Applications
GAIN RANGING
V IN
+
It benefits from changing the gain on the PGA. Just as
a hand-held multimeter uses different measurement
MCP6021
_
10.0 k ?
ranges to obtain the best results, this circuit makes it
easy to set a high gain for small signals and a low gain
for large signals. As a result, the required dynamic
range at the PGA’s output is less than at its input (by up
1.11 k ?
MCP6S21
V OUT
to 30 dB).
FIGURE 6-5:
PGA with lower gain range.
MCP6S2X
V OUT
6.4.3
EXTENDED GAIN RANGE PGA
I X
R S
which is much greater than the range for a single PGA
(+1 V/V to +32 V/V). The first PGA provides input mul-
tiplexing capability, while the second PGA only needs
FIGURE 6-3: Wide Dynamic Range
Current Measurement Circuit.
one input. These devices can be daisy chained
6.4.2
SHIFTED GAIN RANGE PGA
of +10 in front of an MCP6S21. This changes the over-
V IN
MCP6S28
MCP6S21
V OUT
all gain range to +10 V/V to +320 V/V (from +1 V/V to
+32 V/V).
FIGURE 6-6:
PGA with Extended Gain
V IN
+
Range.
MCP6021
MCP6S21
V OUT
6.4.4
MULTIPLE SENSOR AMPLIFIER
_
10.0 k ?
1.11 k ?
The multiple channel PGAs (except the MCP6S21)
allow the user to select which sensor appears on the
output (see Figure 6-7). These devices can also
change the gain to optimize performance for each
sensor.
Sensor # 0
FIGURE 6-4:
Range.
PGA with Modified Gain
Sensor # 1
MCP6S26
V OUT
It is also easy to shift the gain range to lower gains (see
Figure 6-6). The MCP6021 acts as a unity gain buffer,
Sensor # 5
and the resistive voltage divider shifts the gain range
down to +0.1 V/V to +3.2 V/V (from +1 V/V to +32 V/V).
DS21117A-page 26
FIGURE 6-7:
Inputs.
PGA with Multiple Sensor
? 2003 Microchip Technology Inc.
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