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参数资料
| 型号： | A3904ECGTR |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 7/8页 |
| 文件大小： | 0K |
| 描述： | IC VOICE COIL MOTOR DVR 6-WLCSP |
| 标准包装： | 24,000 |
| 应用： | 音圈电机驱动器 |
| 输出数： | 1 |
| 电流 - 输出： | 127mA |
| 电压 - 负载： | 0.5 V ~ 5.9 V |
| 电源电压： | 2.4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-XFBGA，WLCSP |
| 供应商设备封装： | 6-WLCSP |
| 包装： | 带卷 (TR) |
A3904
Low Voltage Voice Coil Motor Driver
Application Information
Headroom The current may not reach the programmed level
if there is not adequate headroom in the output circuit. The IC
output voltage must be over 500 mV to guarantee normal linear
operation. V DD , I LOAD , and R LOAD can be adjusted to ensure that
the device operates in the linear range.
If the equation shown below is not satisfied, the load current
will be limited by the series impedance, and may not reach the
programmed level
V DD (min) – R LOAD (max) × I OUT (max) ≥ 500 mV .
I OUT Errors
Relative accuracy (INL) This error is calculated by measuring
the worse case deviation from a straight line, defined from end
points. The straight line end points are defined by the actual mea-
sured values at Code = 16 and Code = 255. See figure 1.
Differential nonlinearity (DNL) A measure of the monotonic-
ity of the D-to-A converter. The slope of the line must always
be positive for each incremental step, according to the following
formula:
DNL = ( I OUT( n +1) – I OUT( n ) ) / LSB – 1 (LSB) .
where n is in the range 16 to 255.
Offset error The measured output current at input Code = 16,
compared to the ideal value according to the transfer function
(8 mA).
Gain Error The difference in the slopes of the ideal transfer
function and the actual transfer function. The gain error is calcu-
lated by subtracting out the offset error, at Code = 16, from the
actual transfer function. This calculated value is compared to the
ideal transfer function and reported as a percentage of the ideal
full scale value (127.5 mA). See figure 2.
Gain Error Drift The change in slope of the transfer function
due to temperature, expressed as LSB/°C.
127.5
96.0
INL
127.5
Offset
Error
Gain
Error
64.0
32.0
0
0
0
16
128
255
0
16
128
255
Code
Straight line between measured Codes 16 and 255
Relative Accuracy ( Codes 16-255), errors exaggerated for clarity
Figure 1. Relative accuracy error
Code
Ideal DAC
Actual DAC, errors exaggerated for clarity
Calculated Gain Error, Offset Error removed
Figure 2. Gain error
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A3904ECW | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Low Voltage Voice Coil Motor Driver |
| A3904EEWTR-P | 功能描述:IC MOTOR DRVR VOICE COIL LV 6DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:步进电机驱动器，1-2 相，2 相 评估套件:- 输出数:1 电流 - 输出:800mA 电压 - 负载:10 V ~ 28 V 电源电压:4.75 V ~ 5.25 V 工作温度:-20°C ~ 90°C 安装类型:表面贴装 封装/外壳:28-SOP + 2 翼片裸露焊盘 供应商设备封装:28-HSOPHC（15.2x7.9） 包装:剪切带 (CT) 其它名称:869-1268-1 |
| A3906 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Low Voltage Stepper and Single/Dual DC Motor Driver |
| A3906-0000T | 制造商:3M 制造商全称:3M Electronics 功能描述:100 x 100, PCB Two Row |
| A3906-0010T | 制造商:3M 制造商全称:3M Electronics 功能描述:100 x 100, PCB Two Row |
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