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| 型号： | AD5821ABCBZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/17页 |
| 文件大小： | 0K |
| 描述： | IC DAC 10BIT CURRENTSINK 9WLCSP |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 产品变化通告： | 8mm Carrier Tape Changes 28/Feb/2012 |
| 标准包装： | 10,000 |
| 设置时间： | 250µs |
| 位数： | 10 |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 功率耗散（最大）： | 5mW |
| 工作温度： | -30°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 9-UFBGA，WLCSP |
| 供应商设备封装： | 9-WLCSP（1.52 x 1.69） |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 1 电流，单极 |
| 采样率（每秒）： | * |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5821ABCBZ-REEL7 | 功能描述:IC DAC 10BIT CURRENTSINK 9-WLCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 设置时间:4µs 位数:12 数据接口:串行 转换器数目:2 电压电源:单电源 功率耗散（最大）:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-uMAX 包装:管件 输出数目和类型:2 电压，单极 采样率（每秒）:* 产品目录页面:1398 (CN2011-ZH PDF) |
| AD5821AD-WAFER | 制造商:AD 制造商全称:Analog Devices 功能描述:120 mA, Current Sinking, 10-Bit, I2C DAC |
| AD5821A-WAFER | 制造商:AD 制造商全称:Analog Devices 功能描述:120 mA, Current Sinking, 10-Bit, I2C DAC |
| AD5821BCBZ-REEL | 功能描述:IC DAC 10BIT CURRENTSINK 9WLCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 标准包装:2,400 系列:- 设置时间:- 位数:18 数据接口:串行 转换器数目:3 电压电源:模拟和数字 功率耗散（最大）:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:36-TFBGA 供应商设备封装:36-TFBGA 包装:带卷 (TR) 输出数目和类型:* 采样率（每秒）:* |
| AD5821BCBZ-REEL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:120 mA, Current Sinking, 10-Bit, I2C DAC |
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