參數(shù)資料
型號： AD7715AR-5REEL
廠商： Analog Devices Inc
文件頁數(shù)： 31/40頁
文件大?。?/td> 0K
描述： IC ADC 16BIT SIGMA-DELTA 16-SOIC
標準包裝： 1
位數(shù)： 16
采樣率（每秒）： 500
數(shù)據(jù)接口： DSP，MICROWIRE?，QSPI?，串行，SPI?
轉換器數(shù)目： 1
功率耗散（最大）： 9.5mW
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-SOIC（0.295"，7.50mm 寬）
供應商設備封裝： 16-SOIC W
包裝： 標準包裝
輸入數(shù)目和類型： 1 個差分，單極；1 個差分，雙極
配用： EVAL-AD7715-3EBZ-ND - BOARD EVALUATION FOR AD7715
其它名稱： AD7715AR-5REELDKR
AD7715
Rev. D | Page 37 of 40
TEMPERATURE MEASUREMENT
Another application area for the AD7715 is in temperature
measurement. Figure 15 outlines a connection from a thermo-
couple to the AD7715. In this application, the AD7715 is operated
in its buffered mode to allow large decoupling capacitors on the
front end to eliminate any noise pickup that there may have
been in the thermocouple leads. When the AD7715 is operated
in buffered mode, it has a reduced common-mode range. To place
the differential voltage from the thermocouple on a suitable
common-mode voltage, the AIN() input of the AD7715 is
biased up at the reference voltage, 2.5 V.
Figure 16 shows another temperature measurement application
for the AD7715. In this case, the transducer is an resistive tem-
perature device (RTD), a PT100. The arrangement is a 4-lead
RTD configuration. There are voltage drops across the lead
resistances RL1 and RL4, but these simply shift the common-
mode voltage. There is no voltage drop across lead resistances
RL2 and RL3 as the input current to the AD7715 is very low. The
lead resistances present a small source impedance so it would
not generally be necessary to turn on the buffer on the AD7715.
If the buffer is required, the common-mode voltage should be
set accordingly by inserting a small resistance between the bottom
end of the RTD and AGND of the AD7715. In the application
shown in Figure 16, an external 400 μA current source provides
the excitation current for the PT100 and it also generates the
reference voltage for the AD7715 via the 6.25 kΩ resistor. Varia-
tions in the excitation current do not affect the circuit as both the
input voltage and the reference voltage vary ratiometrically with
the excitation current. However, the 6.25 kΩ resistor must have
a low temperature coefficient to avoid errors in the reference
voltage over temperature.
SERIAL INTERFACE
MCLK IN
MCLK OUT
REF IN(+)
REF IN(–)
AGND
DGND
DOUT
DIN
SCLK
AD7715
AIN(+)
AIN(–)
A = 1 TO 128
PGA
BUFFER
CLOCK
GENERATION
GND
VOUT
REF192
THERMOCOUPLE
JUNCTION
+5V
+VIN
R
CC
AUTO-ZEROED
Σ-
MODULATOR
CHARGE BALANCING ADC
DIGITAL
FILTER
AVDD
REGISTER BANK
CS
DRDY
RESET
DVDD
5V
08
51
9-
0
15
Figure 15. Thermocouple Measurement Using the AD7715
SERIAL INTERFACE
MCLK IN
MCLK OUT
DOUT
DIN
SCLK
AD7715
A = 1 TO 128
PGA
BUFFER
CLOCK
GENERATION
AUTO-ZEROED
Σ-
MODULATOR
CHARGE BALANCING ADC
DIGITAL
FILTER
AVDD
REGISTER BANK
CS
DRDY
RESET
DVDD
+5V
400A
RL4
RL3
RL2
RL1
RTD
6.25k
REF IN(+)
REF IN(–)
AGND
DGND
AIN(+)
AIN(–)
0
85
19
-0
16
Figure 16. RTD Measurement Using the AD7715
相關PDF資料
PDF描述
MAX9770ETI+T IC AMP AUDIO 1.2W MONO D 28TQFN
17982-7PG-3ES CONN RCPT 7POS PNL MNT PIN
LTC1285IS8#TRPBF IC A/D CONV SAMPLING 12BIT 8SOIC
LTC1285IS8#TR IC ADC 12BIT 3V SAMPLING 8SOIC
MAX9761ETI+T IC AMP AUDIO PWR 3W STER 28TQFN
相關代理商/技術參數(shù)
參數(shù)描述
AD7715ARU-3 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 19.2ksps 16-bit Serial 16-Pin TSSOP
AD7715ARU-3REEL 功能描述:IC ADC 16BIT SIGMA-DELTA 16TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極
AD7715ARU-3REEL7 功能描述:IC ADC 16BIT SIGMA-DELTA 16TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極
AD7715ARU-5 功能描述:IC ADC 16BIT SIGMA-DELTA 16TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極
AD7715ARU-5REEL 功能描述:IC ADC 16BIT SIGMA-DELTA 16TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*