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參數(shù)資料
| 型號： | AD5662 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 2.7 V to 5.5 V, 250 ??A, Rail-to-Rail Output 16-Bit DAC D/A in a SOT-23 |
| 中文描述： | 2.7 V至5.5 V，250？？甲，軌到軌輸出16位DAC數(shù)/阿中采用SOT - 23 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大?。?/td> | 357K |
| 代理商： | AD5662 |
Preliminary Technical Data
AD5662
USING AD5662 WITH A
GALVANICALLY ISOLATED
INTERFACE
In process-control applications in industrial environments, it is
often necessary to use a galvanically isolated interface to protect
and isolate the controlling circuitry from any hazardous
common-mode voltages that may occur in the area where the
DAC is functioning. Isocouplers provide isolation in excess of
3 kV. The AD5662 uses a 3-wire serial logic interface so the
ADuM130x 3-channel digital isolator provides the required
isolation (see Figure 38). The power supply to the part also
needs to be isolated. This is done by using a transformer. On the
DAC side of the transformer, a 5 V regulator provides the 5 V
supply required for the AD5662.
Rev. PrA | Page 17 of 20
V
DD
0.1
μ
F
V
DD
10k
10k
V
DD
10k
+5V
REGULATOR
V
OUT
GND
0
DIN
SYNC
SCLK
POWER
10
μ
F
V
DD
SYNC
SCLK
DATA
AD5662
Figure 38. AD5662 with an Opto-Isolated Interface
POWER SUPPLY BYPASSING AND GROUNDING
When accuracy is important in a circuit, it is helpful to carefully
consider the power supply and ground return layout on the
board. The printed circuit board containing the AD5662 should
have separate analog and digital sections, each having its own
area of the board. If the AD5662 is in a system where other
devices require an AGND-to-DGND connection, the connection
should be made at one point only. This ground point should be
as close as possible to the AD5662.
The power supply to the AD5662 should be bypassed with 10 μF
and 0.1 μF capacitors. The capacitors should be located as close
as possible to the device, with the 0.1 μF capacitor ideally right
up against the device. The 10 μF capacitors are the tantalum
bead type. It is important that the 0.1 μF capacitor has low
effective series resistance (ESR) and effective series inductance
(ESI), for example, common ceramic types of capacitors. This
0.1 μF capacitor provides a low impedance path to ground for
high frequencies caused by transient currents due to internal
logic switching.
The power supply line itself should have as large a trace as
possible to provide a low impedance path and reduce glitch
effects on the supply line. Clocks and other fast switching
digital signals should be shielded from other parts of the board
by digital ground. Avoid crossover of digital and analog signals
if possible. When traces cross on opposite sides of the board,
ensure that they run at right angles to each other to reduce
feedthrough effects through the board. The best board layout
technique is the microstrip technique where the component
side of the board is dedicated to the ground plane only and the
signal traces are placed on the solder side. However, this is not
always possible with a 2-layer board.
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| AD5662ARJ | 制造商:Analog Devices 功能描述: |
| AD5662ARJ-1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:2.7 V to 5.5 V, 250 ??A, Rail-to-Rail Output 16-Bit DAC D/A in a SOT-23 |
| AD5662ARJ-1500RL7 | 功能描述:IC DAC 16BIT BUFF V-OUT SOT23-8 RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:nanoDAC™ 產(chǎn)品培訓(xùn)模塊:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色產(chǎn)品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 標(biāo)準(zhǔn)包裝:91 系列:- 設(shè)置時間:4µs 位數(shù):10 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:8 電壓電源:單電源 功率耗散（最大）:2.7mW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-DFN-EP（4x3） 包裝:管件 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:* |
| AD5662ARJ-1REEL7 | 功能描述:IC DAC 16BIT BUFF V-OUT SOT23-8 RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:nanoDAC™ 產(chǎn)品培訓(xùn)模塊:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色產(chǎn)品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 標(biāo)準(zhǔn)包裝:91 系列:- 設(shè)置時間:4µs 位數(shù):10 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:8 電壓電源:單電源 功率耗散（最大）:2.7mW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-DFN-EP（4x3） 包裝:管件 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:* |
| AD5662ARJ-2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:2.7 V to 5.5 V, 250 ??A, Rail-to-Rail Output 16-Bit DAC D/A in a SOT-23 |
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