UPD160040 NEC, UPD160040 Datasheet - Page 6
UPD160040
Manufacturer Part Number
UPD160040
Description
384-OUTPUT TFT-LCD SOURCE DRIVER
Manufacturer
NEC
Datasheet
1.UPD160040.pdf
(19 pages)
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