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參數(shù)資料
| 型號(hào)： | EVAL-AD5821EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 7/17頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION FOR AD5821 |
| 產(chǎn)品培訓(xùn)模塊： | DAC Architectures |
| 標(biāo)準(zhǔn)包裝： | 1 |
| DAC 的數(shù)量： | 1 |
| 位數(shù)： | 10 |
| 采樣率（每秒）： | 400k |
| 數(shù)據(jù)接口： | I²C |
| 設(shè)置時(shí)間： | 250µs |
| DAC 型： | 電流 |
| 工作溫度： | -30°C ~ 80°C |
| 已供物品： | 板，纜線，CD |
| 已用 IC / 零件： | AD5821 |
| 相關(guān)產(chǎn)品： | AD5821BCBZ-REEL7DKR-ND - IC DAC 10BIT CURRENTSINK 9WLCSP AD5821BCBZ-REEL7CT-ND - IC DAC 10BIT CURRENTSINK 9WLCSP AD5821BCBZ-REEL7TR-ND - IC DAC 10BIT CURRENTSINK 9WLCSP AD5821BCBZ-REEL-ND - IC DAC 10BIT CURRENTSINK 9WLCSP |
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AD5821
Rev. 0 | Page 14 of 16
APPLICATIONS INFORMATION
The AD5821 is designed to drive both spring-preloaded and
nonspring linear motors used in applications such as lens auto-
focus, image stabilization, or optical zoom. The operation principle
of the spring-preloaded motor is that the lens position is controlled
by the balancing of a voice coil and spring. Figure 25 shows the
transfer curve of a typical spring-preloaded linear motor for
autofocus. The key points of this transfer function are displace-
ment or stroke, which is the actual distance the lens moves in
millimeters (mm) and the current through the motor, measured
in milliamps (mA).
A start current is associated with spring-preloaded linear
motors, which is a threshold current that must be exceeded for
any displacement in the lens to occur. The start current is usually
20 mA or greater; the rated stroke or displacement is usually
0.25 mm to 0.4 mm; and the slope of the transfer curve is
approximately 10 μm/mA or less.
The AD5821 is designed to sink up to 120 mA, which is more
than adequate for available commercial linear motors or voice
coils. Another factor that makes the AD5821 the ideal solution
for these applications is the monotonicity of the device, ensuring
that lens positioning is repeatable for the application of a given
digital word.
Figure 26 shows a typical application circuit for the AD5821.
10
50
60
80
70
90 100
40
30
20
110 120
0.1
0.5
0.4
0.3
0.2
START
CURRENT
SINK CURRENT (mA)
S
T
RO
KE
(
m
)
05
95
0-
0
29
Figure 25. Spring-Preloaded Voice Coil Stroke vs. Sink Current
05
95
0-
02
8
7
2
1
XSHUTDOWN
8
VOICE
COIL
ISINK
RSENSE
REFERENCE
R
AD5821
5
SCL
SDA
I2C MASTER
DEVICE
I2C SLAVE
DEVICE
RP
VDD
VCC
VDD
D1
0.1F
I2C SERIAL
INTERFACE
3
4
6
POWER-ON
RESET
0.1F
10F
+
VCC
VDD
10-BIT
CURRENT
OUTPUT DAC
Figure 26. Typical Application Circuit
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-AD5821EBZ1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:120 mA, Current Sinking, 10-Bit, I2C DAC |
| EVAL-AD5930EB | 制造商:Analog Devices 功能描述:EVALUATION CONTROL BOARD I.C. - Bulk |
| EVAL-AD5930EBZ | 功能描述:BOARD EVAL FOR AD5930 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電信，線路接口單元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板，電源，線纜，CD 其它名稱:82EBV2081 |
| EVAL-AD5932EB | 制造商:Analog Devices 功能描述:EVALUATION BOARD - Bulk |
| EVAL-AD5932EBZ | 功能描述:BOARD EVAL FOR AD5932 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電信，線路接口單元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板，電源，線纜，CD 其它名稱:82EBV2081 |
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