- 您现在的位置：买卖IC网 > PDF目录16560 > MAX749ESA+T (Maxim Integrated Products)IC SUPPLY LCD BIAS ADJ 8-SOIC PDF资料下载
参数资料
| 型号： | MAX749ESA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC SUPPLY LCD BIAS ADJ 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | LCD 显示器 |
| 电流 - 电源： | 60µA |
| 电源电压： | 2 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
Digitally Adjustable LCD Bias Supply
In Figure 3, the MAX749 is reset when it is taken out of
ADJ
CTRL
shutdown, which sets the output at mid-scale. Figure 4
shows how to increment the counter. Figure 5 illustrates
a reset without shutting the device down.
Figure 7 provides an example of a sequence of opera-
t R
t SD
tions: Starting from shutdown, the device is turned on,
incremented, reset to mid-scale without being shut
SHUTDOWN RESET
ON
SHUTDOWN
down, incremented again, and finally shut down.
Shutdown Mode
Figure 3. Shutdown-Reset-On-Shutdown Sequence of Operation.
The device is not shut down during reset.
When CTRL and ADJ are both low, the MAX749 is shut
down (Table 1): The internal reference and biasing cir-
cuitry turn off, the output voltage drops to zero, and the
supply current drops to 15μA. The MAX749 retains its
DAC setting, simplifying software control.
ADJ
CTRL
t SH
t SL
HIGH
Reset Mode
If ADJ is high when CTRL is low, the DAC set point is
reset to mid-scale and the MAX749 is not shut down.
Mid-scale is 32 steps from the minimum, 31 steps from
the maximum.
Design Procedure
Figure 4. Count-Up Operation
ADJ
CTRL
_________and Component Selection
Setting the Output Voltage
The MAX749’s output voltage is set using an external
resistor and the internal current-output DAC. The full-
scale output voltage is set by selecting the feedback
resistor R FB according to the formula:
-V OUT(MAX) = R FB x 20μA (Figure 1).
t RS
t R
t RH
The device is in regulation when V FB = 0V.
DAC Adjustment
ON
RESET
ON
On power-up or after a reset, the counter sets the DAC
output to mid-range, and -V OUT = R FB x 13.33μA. Each
rising edge of ADJ increments the counter (and there-
Figure 5. Reset Sequence without Shutdown. The device is not
shut down during reset.
fore the DAC output) in the direction of -V OUT(MAX) by
one count. When incremented beyond -V OUT(MAX) , the
ADJ
CTRL
t R
t RH
ADJ
CTRL
INCREMENT
RESET
INCREMENT
SHUTDOWN
RESET
ON
SHUTDOWN
ON
SHUTDOWN
Figure 6. Reset Sequence with Shutdown
Figure 7. Control Sequence Example (see Output Voltage
Control section)
_______________________________________________________________________________________
7
相关PDF资料 |
PDF描述 |
|---|---|
| RSA06DRSN-S288 | CONN EDGECARD 12POS .125 EXTEND |
| H3CCS-6406M | IDC CABLE - HKC64S/AE64M/HKC64S |
| UPC3218GV-EVAL | EVAL BOARD FOR UPC3218GV |
| M2MXH-2020K | IDC CABLE - MDM20H/MC20F/X |
| GBC19DRES-S734 | CONN EDGECARD 38POS .100 EYELET |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX749ESA-TG074 | 制造商:Maxim Integrated Products 功能描述:DIGITALLY ADJUSTABLE LCD BIAS SUPPLY - Rail/Tube |
| MAX749EVKIT-SO | 功能描述:显示开发工具 RoHS:否 制造商:4D Systems 产品:4Display Shields 工具用于评估:?OLED-160-G1, ?OLED-160-G2 接口类型:Serial 工作电源电压:5 V |
| MAX-750 | 制造商:SLPOWER 制造商全称:SL Power Electronics 功能描述:MAX-750 Multiple Output |
| MAX7500EVKIT+ | 功能描述:板上安装温度传感器 MAX7500 Eval Kit RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX7500MSA | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
发布紧急采购，3分钟左右您将得到回复。