5

General Description

The EL5126 provides 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 EL5126,

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 EL5126. As all of the output

buffers are identical, it is also possible to use the EL5126 for

applications other than LCDs where multiple voltage

references are required that can be set to 10 bit accuracy.

Digital Interface

program the outputs. The bus line SCLK is the clock signal

line and bus SDA is the data information signal line. The

EL5126 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

Ω.

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

bus is considered to be busy after the start condition and to

be free again a certain time after the stop condition. The two

bus lines must be high when the buses are not in use. The

FIGURE 9. SMALL SIGNAL RESPONSE (FALLING FROM

200mV TO 0V)

FIGURE 10. POWER DISSIPATION vs AMBIENT

TEMPERATURE

FIGURE 11. POWER DISSIPATION vs AMBIENT TEMPERATURE

SDA

OUTPUT

SCLK

M=400µs/DIV

JEDEC JESD51-7 HIGH EFFECTIVE THERMAL

CONDUCTIVITY TEST BOARD - LPP EXPOSED

DIEPAD SOLDERED TO PCB PER JESD51-5

3

2.5

2

1.5

1

0.5

0

0

255075

100

150

AMBIENT TEMPERATURE (°C)

2.857W

125

85

JEDEC JESD51-3 AND SEMI G42-88

(SINGLE LAYER) TEST BOARD

0.8

0.7

0.5

0.3

0.2

0.1

0

0

255075

100

150

AMBIENT TEMPERATURE (°C)

758mW

125

85

0.6

0.4

EL5126