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參數(shù)資料
| 型號： | EVAL-AD7706EB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs |
| 中文描述： | 3伏/ 5伏，1毫瓦2-/3-Channel 16位Σ-Δ模數(shù)轉(zhuǎn)換器 |
| 文件頁數(shù)： | 30/32頁 |
| 文件大?。?/td> | 264K |
| 代理商： | EVAL-AD7706EB |
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AD7705/AD7706
–30–
REV. A
AD7705
V
DD
+5V
AIN1(+)
AIN1(–)
REF IN(–)
GND
MCLK IN
MCLK OUT
RESET
DRDY
DOUT DIN
CS
SCLK
REF IN(+)
6.25k
V
400
m
A
R
L1
R
L2
R
L3
R
L4
RTD
Figure 24. RTD Measurement Using the AD7705
Smart Transmitters
Another area where the low power, single supply, three-wire
interface capabilities is of benefit is in smart transmitters. Here,
the entire smart transmitter must operate from the 4mA to
20mA loop. Tolerances in the loop mean that the amount of
current available to power the transmitter is as low as 3.5mA.
The AD7705 consumes only 320
μ
A, leaving at least 3mA
available for the rest of the transmitter. Figure 25 shows a block
diagram of a smart transmitter which includes the AD7705. The
AD7705 with its dual input channel is ideally suited to systems
requiring an auxiliary channel whose measured variable is used
to correct that of the primary channel.
V
DD
GND
REF IN
ISOLATED SUPPLY
4.7
m
F
100k
V
MCLK IN
MCLK OUT
AD7705
ISOLATED GROUND
MICROCONTROLLER UNIT
PID
RANGE SETTING
CALIBRATION
LINEARIZATION
OUTPUT CONTROL
SERIAL COMMUNICATION
HART PROTOCOL
V
CC
COM
V
CC
BOOST
REF OUT1
REF OUT2
REF IN
AD421
C1 C2 C3
COM
LOOP
RTN
COMP
DRIVE
4.7
m
F
0.01
m
F
0.1
m
F
2.2
m
F
DN25D
1k
V
1000pF
0.01
m
F
0.01
m
F
0.0033
m
F
ISOLATION
BARRIER
SENSORS
RTD
mV
V
TC
MAIN TRANSMITTER ASSEMBLY
4mA
TO
20mA
Figure 25. Smart Transmitter Using the AD7705
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EVAL-AD7707EB | Evaluation Board for the AD7707 3V/5V, +/-10V Input Range, 1mW, 3Channel, 16-Bit, Sigma Delta ADC |
| EVAL-AD7708EB | 8-/10-Channel, Low Voltage, Low Power, ADCs |
| EVAL-AD7718EB | 8-/10-Channel, Low Voltage, Low Power, ADCs |
| EVAL-AD7710EB | CAPACITOR 0.1UF CERAMIC 0805 |
| EVAL-AD7711EB | CERAMIC CHIP CAPACITOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-AD7706EBZ | 功能描述:BOARD EVALUATION FOR AD7706 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7707EB | 制造商:Analog Devices 功能描述:EVAL KIT FOR 3V/5 V, 610 V INPUT RANGE, 1 MW 3-CH 16BIT, SIG - Bulk |
| EVAL-AD7708EB | 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
| EVAL-AD7708EBZ | 功能描述:BOARD EVAL FOR AD7708 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| EVAL-AD7709EB | 制造商:Analog Devices 功能描述:EVAL KIT FOR 16BIT- ADC W/ SWITABLE CURRENT SOURCES - Bulk |
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