UPD160040 NEC, UPD160040 Datasheet - Page 6

• Manufacturer Part Number: UPD160040
• Description: 384-OUTPUT TFT-LCD SOURCE DRIVER
• Manufacturer: NEC

5. RELATIONSHIP BETWEEN INPUT DATA AND OUTPUT VOLTAGE VALUE
gray scale voltages of differing polarity with respect to the LCD’s counter electrode voltage. The D/A converter
consists of ladder resistors and switches.
V
and V
0.5 V
to the all pins, as V
6
The PD160040 incorporates a 8-bit D/A converter whose odd output pins and even output pins output respectively
The ladder resistors (r
Figure 5 1 shows the relationship between the driving voltages such as liquid-crystal driving voltages V
Also, V
Figures 5 3 shows the relationship between the input data and the output voltage.
0
”-V
DD2
255
8
-V
” is almost equivalent as shown in Figure 5 2. For the 2 sets of eight -compensated power supplies, V
, and -corrected voltages V
6
15
-V
0.2 V
, respectively, input gray scale voltages of the same polarity with respect to the 0.5 V
7
0.2 V
and V
V
0.5 V
DD2
0.5 V
Figure 5 1. Relationship between Input Data and -corrected Power Supplies
8
– 0.2 V
0
DD2
V
-V
-V
V
DD2
DD2
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SS2
0
1
2
3
5
6
7
8
9
10
11
4
12
13
14
15
9
15
– 0.5 V
0
are left open in the IC. Be sure to input the gray scale level power supply at a constant level
.
00 01
to r
253
V
0
) are designed so that the ratio of LCD panel ( -compensated voltages to V
> V
V
8
20
1
> V
> V
0
to V
9
2
> V
> V
15
40
10
and the input data. Be sure to maintain the voltage relationships below.
3
> V
> V
Data Sheet S15859EJ1V0DS
11
4
> V
> V
5
12
Input Data (HEX)
> V
> V
6
80
13
> V
> V
7
14
0.5 V
> V
15
DD2
V
+ 0.5 V
C0
SS2
+ 0.2 V
F0
FF
DD2
www.DataSheet4U.com
.
0.5 V
0.5 V
DD2
PD160040
0
’-V
, V
255
SS2
0
’ and
-V
and
7