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参数资料
| 型号： | AS1108WL-T |
| 厂商： | ams |
| 文件页数： | 13/21页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER LED 4-DIGIT 20-SOIC |
| 标准包装： | 1,500 |
| 显示器类型： | LED |
| 配置： | 7 段 + DP |
| 接口： | 串行 |
| 数字或字符： | 4 位数字 |
| 电流 - 电源： | 330mA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC |
| 包装： | 带卷 (TR) |
AS1108
Datasheet - D e t a i l e d D e s c r i p t i o n
Intensity Control Register (0xXA)
The brightness of the display can be controlled by digital means using the Intensity Control Register and by analog
means using R SET (see Selecting RSET Resistor Value and Using External Drivers on page 14).
Display brightness is controlled by an integrated pulse-width modulator which is controlled by the lower-nibble of the
Intensity Control Register. The modulator scales the average segment-current in 16 steps from a maximum of 31/32
down to 1/32 of the peak current set by R SET .
Table 14. Intensity Register Format (Address (HEX) = 0xXA))
Duty Cycle
AS1108
1/32 (min on)
3/32
5/32
7/32
9/32
11/32
13/32
15/32
17/32
19/32
21/32
23/32
25/32
27/32
29/32
31/32 (max on)
HEX Code
0xX0
0xX1
0xX2
0xX3
0xX4
0xX5
0xX6
0xX7
0xX8
0xX9
0xXA
0xXB
0xXC
0xXD
0xXE
0xXF
D7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D6
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D5
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Register Data
D4 D3
X 0
X 0
X 0
X 0
X 0
X 0
X 0
X 0
X 1
X 1
X 1
X 1
X 1
X 1
X 1
X 1
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Scan-Limit Register (0x0B)
The Scan-Limit Register controls which of the digits are to be displayed. When all 4 digits are to be displayed, the
update frequency is typically 1600Hz. If the number of digits displayed is reduced, the update frequency is increased.
The frequency can be calculated using 8fOSC/N, where N is the number of digits. Since the number of displayed digits
influences the brightness, R SET should be adjusted accordingly. Table 16 lists the maximum allowed current when
fewer than 4 digits are used.
Note: To avoid differences in brightness this register should not be used to blank parts of the display (leading zeros).
Table 15. Scan-Limit Register Format (Address (HEX) = 0xXB))
Scan Limit
Display digits 0:3
HEX Code
0xX0
0xX1
0xX2
0xX3
D7
X
X
X
X
D6
X
X
X
X
D5
X
X
X
X
Register Data
D4 D3
X X
X X
X X
X X
D2
0
0
0
0
D1
0
0
1
1
D0
0
1
0
1
Table 16. Maximum Segment Current for 1-, 2-, or 3-Digit Displays
Number of Digits Displayed
1
2
3
Maximum Segment Current (mA)
10
20
30
Revision 2.13
12 - 20
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1108WL-T-Z | 制造商:AMS 功能描述:0 |
| AS1108-XXX-I-A1-D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1108-XXX-I-A1-S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1108-XXX-I-A2-D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1108-XXX-I-A2-S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
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