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參數(shù)資料
| 型號： | EVAL-AD5398EB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 120 mA, Current Sinking, 10-Bit, I2C DAC |
| 中文描述： | 120毫安，灌電流，10位和I2C數(shù)模轉(zhuǎn)換器 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 223K |
| 代理商： | EVAL-AD5398EB |
AD5398
Rev. A | Page 11 of 16
0
PD
X
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
X
X
X
X
0
0
SCL
SDA
START BY
MASTER
ACK BY
AD5398
1
1
9
1
ACK BY
AD5398
ACK BY
AD5398
STOP BY
MASTER
FRAME 3
LEAST SIGNIFICANT
DATA BYTE
FRAME 2
MOST SIGNIFICANT
DATA BYTE
FRAME 1
SERIAL BUS
ADDRESS BYTE
0
1
1
X
X
R/W
9
Figure 17. Write Operation
0
PD
X
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
X
X
X
X
0
0
SCL
SDA
START BY
MASTER
ACK BY
AD5398
1
1
9
1
ACK BY
AD5398
ACK BY
AD5398
STOP BY
MASTER
FRAME 3
LEAST SIGNIFICANT
DATA BYTE
FRAME 2
MOST SIGNIFICANT
DATA BYTE
FRAME 1
SERIAL BUS
ADDRESS BYTE
0
1
1
X
X
R/W
9
Figure 18. Read Operation
Table 6. Data Format
1
Serial Data-Words
Serial Data Bits
Input Register
Function
1
PD = soft power-down; X = unused/don’t care; 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 AD5398 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 AD5398.
High Byte
SD7
R15
PD
Low Byte
SD7
R7
D3
SD6
R14
X
SD5
R13
D9
SD4
R12
D8
SD3
R11
D7
SD2
R10
D6
SD1
R9
D5
SD0
R8
D4
SD6
R6
D2
SD5
R5
D1
SD4
R4
D0
SD3
R3
X
SD2
R2
X
SD1
R1
X
SD0
R0
X
Special attention should be paid to the layout of the AGND
return path and track between the voice coil motor and I
SINK
to
minimize any series resistance. Figure 19 shows the output
current sink of the AD5398 and illustrates the importance of
reducing the effective series impedance of AGND, and the track
resistance between the motor and I
SINK
. The voice coil is
modeled as inductor L
C
and resistor R
C
. The current through
the voice coil is effectively a dc current that results in a voltage
drop, V
C
, when the AD5398 is sinking current; the effect of any
series inductance is minimal. The maximum voltage drop
allowed across R
SENSE
is 400 mV, and the minimum drain to
source voltage of Q1 is 200 mV. This means that the AD5398
output has a compliance voltage of 600 mV. If V
DROP
falls below
600 mV, the output transistor, Q1, can no longer operate
properly and I
SINK
might not be maintained as a constant.
0
7
AGND
V
G
Q1
GROUND
RESISTANCE
GROUND
INDUCTANCE
8
I
SINK
R
SENSE
Ω
R
G
L
G
V
DROP
V
T
V
C
V
BAT
R
T
R
C
L
C
TRACE
RESISTANCE
VOICE
COIL
ACTUATOR
Figure 19. Effect of PCB Trace Resistance and Inductance
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-AD5398EBZ | 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
| EVAL-AD5405EB | 功能描述:BOARD EVAL FOR AD5405 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| EVAL-AD5405EBZ | 功能描述:BOARD EVAL FOR AD5405 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| EVAL-AD5415EB | 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
| EVAL-AD5415EBZ | 制造商:Analog Devices 功能描述:Evaluation Board For Dual 12-Bit, High Bandwidth, Multiplying DAC With 4-Quadrant Resistors And Serial Interface 制造商:Analog Devices 功能描述:DUAL 12-BIT, HIGH BANDWIDTH, MULTIPLYING DAC W/ 4-QUADRANT R - Bulk |
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