参数资料
| 型号： | EL5326IR-T7 |
| 厂商： | Intersil |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC VREF GEN 12CH TFT-LCD28TSSOP |
| 标准包装： | 1,000 |
| 应用： | 转换器，TFT，LCD |
| 输入电压： | 5 V ~ 16.5 V |
| 输出数： | 12 |
| 输出电压： | 0.5 V ~ 14.95 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 带卷 (TR) |
EL5226, EL5326
General Description
The EL5226 and EL5326 provide a versatile method of
providing the reference voltages that are used in setting the
transfer characteristics of LCD display panels. The V/T
(Voltage/Transmission) curve of the LCD panel requires that
a correction is applied to make it linear; however, if the panel
is to be used in more than one application, the final curve
may differ for different applications. By using the EL5226
and EL5326, the V/T curve can be changed to optimize its
characteristics according to the required application of the
display product. Each of the eight reference voltage outputs
can be set with a 10-bit resolution. These outputs can be
driven to within 50mV of the power rails of the EL5226 and
EL5326. As all of the output buffers are identical, it is also
possible to use the EL5226 and EL5326 for applications
other than LCDs where multiple voltage references are
required that can be set to 10 bit accuracy.
Digital Interface
The EL5226 and EL5326 use a simple two-wire I 2 C digital
interface to program the outputs. The bus line SCLK is the
clock signal line and bus SDA is the data information signal
line. The EL5226 and EL5326 can support the clock rate up
to 400kHz. External pull up resistor is required for each bus
line. The typical value for these two pull up resistor is about
1k ? .
START AND STOP CONDITION
The Start condition is a high to low transition on the SDA line
while SCLK is high. The Stop condition is a low to high
transition on the SDA line while SCLK is high. The start and
stop conditions are always generated by the master. The
the Device Address and write/read bit. This address is a 7-
bit long device address and only two device addresses (74H
and 75H) are allowed for the EL5226 and EL5326. The first
6 bits (A6 to A1, MSBs) of the device address have been
factory programmed and are always 111010. Only the least
significant bit A0 is allowed to change the logic state, which
can be tied to V SD or DGND. A maximum of two EL5226
and EL5326 may be used on the same bus at one time. The
EL5226 and EL5326 monitor the bus continuously and
waiting for the start condition followed by the device address.
When a device recognizes its device address, it will start to
accept data. An eighth bit is followed by the device address,
which is a data direction bit (W/R). A "0" indicates a Write
transmission and a "1" indicates a Read transmission.
The EL5226 and EL5326 can be operated as Standard
mode and Register mode. See the I 2 C Timing Diagram 1 for
detail formats.
STANDARD MODE
The part operates at Standard Mode if pin 1 (STD/REG) is
held high. The Standard Mode allows the user to program all
outputs at one time. Two data bytes are required for 10-bit
data for each channel output and there are a total of 20/24
data bytes for 10/12 channels. Data in data byte 1 and 2 is
for channel A. Data in data byte 15 and 16 is for channel H.
D9 to D0 are the 10-bit data for each channel. The unused
bits in the data byte are "don't care" and can be set to either
one or zero. See Table 1 for program sample for one
channel setting:
TABLE 1.
DATA
bus is considered to be busy after the start condition and to
be free again a certain time after the stop condition. The two
D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
CONDITION
bus lines must be high when the buses are not in use. The
I 2 C Timing Diagram 2 shows the format.
DATA VALIDITY
The data on the SDA line must be stable during the high
0
1
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Data value = 0
Data value = 512
Data value = 31
Data value = 1023
period of the clock. The high or low state of the data line can
only change when the clock signal on the SCLK line is low.
BYTE FORMAT AND ACKNOWLEDGE
Every byte put on the SDA line must be eight bits long. The
number of bytes that can be transmitted per transfer is
unrestricted. Each byte has to be followed by an
acknowledge bit. Data is transferred with the most significant
bit first (MSB).
The master puts a resistive high level on the SDA line during
the acknowledge clock pulse. The peripheral that
acknowledges has to pull down the SDA line during the
acknowledge clock pulse.
DEVICES ADDRESS AND W/R BIT
Data transfers follow the format shown in Timing Diagram 1.
After the Start condition, a first byte is sent which contains
7
When the W/R bit is high, the master can read the data from
the EL5226 and EL5326. See Timing Diagram 1 for detail
formats.
REGISTER MODE
The part operates at Register Mode if pin 1 (STD/REG) is
held low. The Register Mode allows the user to program
each output individually. Followed by the first byte, the
second byte sets the register address for the programmed
output channel. Bits R0 to R3 set the output channel
address. For the unused bits in the R4 to R7 are "don't care".
See Table 2 for program sample.
The EL5226 and EL5326 also allows the user to read the
data at Register Mode. See Timing Diagram 1 for detail
formats.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EL5326IRZ | 功能描述:基准电压& 基准电流 EL5326IRZ OCTAL 12 MHZ R2R I/O BUFR RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| EL5326IRZ-T13 | 功能描述:基准电压& 基准电流 EL5326IRZ OCTAL 12 MHZ R2R I/O BUFR RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| EL5326IRZ-T7 | 功能描述:基准电压& 基准电流 EL5326IRZ OCTAL 12 MHZ R2R I/O BUFR RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| EL5327 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:2.5MHz 4. 8. 10 & 12 Channel Rail-to-Rail Buffers |
| EL5327CL | 功能描述:IC BUFFER LP 10CH 2.5MHZ 24-QFN RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:LinCMOS™ 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.05 V/µs 增益带宽积:110kHz -3db带宽:- 电流 - 输入偏压:0.7pA 电压 - 输入偏移:210µV 电流 - 电源:57µA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):3 V ~ 16 V，±1.5 V ~ 8 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:管件 产品目录页面:865 (CN2011-ZH PDF) 其它名称:296-1834296-1834-5 |
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