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參數(shù)資料
| 型號： | EVAL-AD7171EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD7171 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 125 |
| 數(shù)據(jù)接口： | 串行 |
| 輸入范圍： | ±VREF |
| 工作溫度： | -40°C ~ 105°C |
| 已用 IC / 零件： | AD7171 |
| 已供物品： | 板 |
Data Sheet
AD7171
Rev. A | Page 13 of 16
APPLICATIONS INFORMATION
The AD7171 provides a low cost, high resolution analog-to-
digital function. Because the analog-to-digital function is
provided by a Σ-Δ architecture, the part is more immune to
noisy environments, making it ideal for use in sensor measure-
ment and industrial and process-control applications.
TEMPERATURE SYSTEM
Figure 13 shows the AD7171 used in a temperature measure-
ment system. The thermistor is connected in series with a
precision resistor, RREF, the precision resistor being used to
generate the reference voltage. The value of RREF is equal to the
maximum resistance produced by the thermistor. The complete
dynamic range of the ADC is then used, resulting in optimum
performance. See Table 7 for suitable external R-C
combinations.
16-BIT Σ-Δ
ADC
AD7171
GND
VDD
INTERNAL
CLOCK
VDD
RREF
REFIN(+)
AIN(+)
AIN(–)
REFIN(–)
SCLK
DOUT/RDY
PDRST
08417-
013
Figure 13. Temperature System Using the AD7171
SIGNAL CONDITIONING CIRCUIT
Figure 14 shows the AD7171 used in a signal conditioning
circuit for a single-ended analog input. In a low side shunt
current monitor, a low resistance shunt resistor converts the
current to voltage. The resulting voltage is amplified and
applied to the AD7171.
08417-
018
AD7171
REFIN(+)
AIN(+)
AIN(–)
REFIN(–)
GND VDD
INTERNAL
CLOCK
SCLK
DOUT/RDY
AD5041
AD8628
1F
ANALOG
INPUT
1k
32k
16-BIT
Σ-Δ ADC
Figure 14. Signal Conditioning Circuit
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