參數(shù)資料
型號(hào)： AD5821ABCBZ-REEL7
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 5/17頁(yè)
文件大?。?/td> 0K
描述： IC DAC 10BIT CURRENTSINK 9-WLCSP
產(chǎn)品培訓(xùn)模塊： Data Converter Fundamentals
DAC Architectures
產(chǎn)品變化通告： 8mm Carrier Tape Changes 28/Feb/2012
標(biāo)準(zhǔn)包裝： 1
設(shè)置時(shí)間： 250µs
位數(shù)： 10
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)目： 1
電壓電源： 單電源
功率耗散（最大）： 5mW
工作溫度： -30°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 9-UFBGA，WLCSP
供應(yīng)商設(shè)備封裝： 9-WLCSP（1.52 x 1.69）
包裝： 標(biāo)準(zhǔn)包裝
輸出數(shù)目和類(lèi)型： 1 電流，單極
采樣率（每秒）： *
產(chǎn)品目錄頁(yè)面： 784 (CN2011-ZH PDF)
其它名稱(chēng)： AD5821ABCBZ-REEL7DKR
AD5821
Rev. 0 | Page 12 of 16
05
95
0-
0
17
PD
X
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
X
00
SCL
SDA
START BY
MASTER
ACK BY
AD5821
11
91
ACK BY
AD5821
ACK BY
AD5821
STOP BY
MASTER
FRAME 3
LEAST SIGNIFICANT
DATA BYTE
FRAME 2
MOST SIGNIFICANT
DATA BYTE
FRAME 1
SERIAL BUS
ADDRESS BYTE
01
1
R/W
9
Figure 22. Write Operation
05
95
0-
01
8
PD
X
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
X
00
SCL
SDA
START BY
MASTER
ACK BY
AD5821
11
91
ACK BY
AD5821
ACK BY
AD5821
STOP BY
MASTER
FRAME 3
LEAST SIGNIFICANT
DATA BYTE
FRAME 2
MOST SIGNIFICANT
DATA BYTE
FRAME 1
SERIAL BUS
ADDRESS BYTE
01
1
R/W
9
Figure 23. Read Operation
Table 6. Data Format1
Serial Data-Words
High Byte
Low Byte
Serial Data Bits
SD7
SD6
SD5
SD4
SD3
SD2
SD1
SD0
SD7
SD6
SD5
SD4
SD3
SD2
SD1
SD0
Input Register
R15
R14
R13
R12
R11
R10
R9
R8
R7
R6
R5
R4
R3
R2
R1
R0
Function
XSHUTDOWN
X
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
X
1 XSHUTDOWN = soft power-down; X = unused/don’t care; and D9 to D0 = DAC data.
POWER SUPPLY BYPASSING AND GROUNDING
When accuracy is important in an application, it is beneficial to
consider power supply and ground return layout on the PCB.
The PCB for the AD5821 should have separate analog and digital
power supply sections. Where shared AGND and DGND is
necessary, the connection of grounds should be made at only
one point, as close as possible to the AD5821.
Special attention should be paid to the layout of the AGND return
path and, and it should be tracked between the voice coil motor
and ISINK to minimize any series resistance. Figure 24 shows the
output current sink of the AD5821 and illustrates the importance
of reducing the effective series impedance of AGND and the track
resistance between the motor and ISINK. The voice coil is modeled
as Inductor LC and Resistor RC. The current through the voice coil
is effectively a dc current that results in a voltage drop, VC, when
the AD5821 is sinking current. The effect of any series inductance
is minimal.
05
95
0-
0
19
AGND
AD5821
Q1
GROUND
RETURN
ISINK
VDROP
RSENSE
R
RG
LG
VCOIL
VBATTERY
RT
RC
LC
TRACE
RESISTANCE
VOICE
COIL
SDA
SCL
XSHUTDOWN
DGND
VDD
Figure 24. Effect of PCB Trace Resistance and Inductance
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AD5821BCBZ-REEL 功能描述:IC DAC 10BIT CURRENTSINK 9WLCSP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:2,400 系列:- 設(shè)置時(shí)間:- 位數(shù):18 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:3 電壓電源:模擬和數(shù)字 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:36-TFBGA 供應(yīng)商設(shè)備封裝:36-TFBGA 包裝:帶卷 (TR) 輸出數(shù)目和類(lèi)型:* 采樣率（每秒）:*
AD5821BCBZ-REEL1 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:120 mA, Current Sinking, 10-Bit, I2C DAC
AD5821BCBZ-REEL7 功能描述:IC DAC 10BIT CURRENTSINK 9WLCSP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 設(shè)置時(shí)間:4µs 位數(shù):12 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-uMAX 包裝:管件 輸出數(shù)目和類(lèi)型:2 電壓，單極 采樣率（每秒）:* 產(chǎn)品目錄頁(yè)面:1398 (CN2011-ZH PDF)
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