DS3508E+ Maxim Integrated Products, DS3508E+ Datasheet - Page 8

• Manufacturer Part Number: DS3508E+
• Description: IC GAMMA BUFFER 8CH 20-TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of DS3508E+

• Applications: TFT-LCD Panels: Gamma Buffer
• Number Of Circuits: 8
• Current - Supply: 2mA
• Current - Output / Channel: 6mA
• Voltage - Supply, Single/dual (±): 9 V ~ 15.5 V
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

I
On power-up, the gamma data that is stored in each
channel’s EEPROM register is loaded into the corre-
sponding SRAM registers. The volatile CR register pow-
ers up as 00h, setting the device into mode 0.
The DACs are composed of a resistor string array and
a switching network per channel. A high-voltage array
Figure 1. Single-Channel Block Diagram
Figure 2. DAC Block Diagram
8
2
_______________________________________________________________________________________
C, 8-Channel Gamma Buffer with EEPROM
VHM
VHH
SDA
SCL
A0
R
R
R
H253
H254
H255
R
R
R
H1
H2
H3
DAC Description
INTERFACE
I
2
C
CODE 0
CODE 1
CODE 2
CODE 253
CODE 254
CODE 255
EEPROM
SRAM
with end points VHH and VHM controls outputs
GM1–GM4, and a low-voltage array with end points
VLM and VLL controls outputs GM5–GM8. The resistor
string arrays are composed of 255 identical resistors.
The switching networks can select any tap point
between adjacent resistors as well as either end point
(VHH/VHM or VLM/VLL pins). Table 1 shows the rela-
tionship between the 8-bit data and the DAC voltage.
VLM
VLL
8-BIT
DAC
R
R
R
L253
L254
L255
R
R
R
L1
L2
L3
GMx
CODE 0
CODE 1
CODE 2
CODE 253
CODE 254
CODE 255