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參數(shù)資料
| 型號： | AD7719 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | ADC |
| 英文描述： | Low Voltage, Low Power, Factory-Calibrated 16-/24-Bit Dual ADC |
| 中文描述： | 低電壓，低功耗，工廠校準(zhǔn)，16-/24-Bit雙ADC |
| 文件頁數(shù)： | 39/40頁 |
| 文件大小： | 367K |
| 代理商： | AD7719 |
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REV. 0
AD7719
–39–
Smart Transmitters
Smart transmitters are another key design-in area for the AD7719.
The dual sigma-delta converter, single supply operation, 3-wire
interface capabilities, and small package size are all of benefit is
in smart transmitters. Here, the entire smart transmitter must
operate from the 4 mA-to-20 mA loop. Tolerances in the loop
mean that the amount of current available to power the trans-
mitter is as low as 3.5 mA. Figure 24 shows a block diagram of a
smart transmitter which includes the AD7719.
MICROCONTROLLER
REF OUT2
REF IN
10 F
0.1 F
AV
DD
DV
DD
AIN1
AIN2
CS
DOUT
SCLK
DIN
DGND
AGND
AIN5
AIN5 COM
REFIN2
REFIN(+)
REFIN(
–
)
0.1 F
REF OUT1
CLOCK
LATCH
DATA
4.7 F
COM
C1
C2
C3
V
CC
GND
AD7719
AD421
BOOST V
CC
LV
0.01 F
1k
1000pF
LOOP
POWER
10 F
3.3V
1.25V
DN25D
0.01 F
LOOP
RTN
COMP
DRIVE
MAIN
VARIABLES
SECONDARY
VARIABLES
AIN3
AIN4
Figure 24. Smart Transmitter Employing the AD7719
Not shown in Figure 24 is the isolated power source required to
power the front end. The advantages of the AD7719 in these
applications is the dual channel operation, meaning that the
user does not have to interrupt the main channel when measur-
ing secondary variables, and therefore does not have the latency
associated with the settling times of the digital filter. The fact
that the AD7719 is factory-calibrated means that in the majority
of applications, the user will not have to perform any field cali-
bration given the excellent offset and gain drift performance of
the device as a result of the signal chain chopping employed in
the signal chain.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD7719BR | Low Voltage, Low Power, Factory-Calibrated 16-/24-Bit Dual ADC |
| AD7720 | CMOS Sigma-Delta Modulator |
| AD7720BRU | CMOS Sigma-Delta Modulator |
| AD7721 | CMOS 16-Bit, 468.75 kHz, Sigma-Delta ADC |
| AD7721AN | CMOS 16-Bit, 468.75 kHz, Sigma-Delta ADC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7719BR | 制造商:Analog Devices 功能描述:ADC Dual Delta-Sigma 105sps 24-bit Serial 28-Pin SOIC W 制造商:Rochester Electronics LLC 功能描述:DUAL 16-BIT & 24-BIT SD ADC - Bulk 制造商:Analog Devices 功能描述:Analog-Digital Converter IC Number of Bi |
| AD7719BR-REEL | 功能描述:IC ADC 16BIT 24BIT DUAL 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)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(zhuǎn)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(yīng)商設(shè)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 |
| AD7719BR-REEL7 | 功能描述:IC ADC 16BIT 24BIT DUAL 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)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(zhuǎn)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(yīng)商設(shè)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 |
| AD7719BRU | 制造商:Analog Devices 功能描述:ADC Dual Delta-Sigma 105sps 24-bit Serial 28-Pin TSSOP |
| AD7719BRU-REEL | 制造商:Analog Devices 功能描述:ADC Dual Delta-Sigma 105sps 24-bit Serial 28-Pin TSSOP T/R 制造商:Analog Devices 功能描述:ADC DUAL DELTA-SIGMA 0.105KSPS 24BIT SERL 28TSSOP - Tape and Reel |
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