UPD160062 NEC, UPD160062 Datasheet - Page 6

• Manufacturer Part Number: UPD160062
• Description: 420-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 (common electrode) voltage. The
D/A converter consists of ladder resistors and switches.
and V
respectively, input gray scale voltages of the same polarity with respect to the common voltage. When fine gray scale
voltage precision is not necessary, there is no need to connect a voltage follower circuit to the
supplies V
common electrode potential V
voltage relationships of
between the input data and the output voltage.
6
The
The ladder resistors (r0 to r62) are designed so that the ratio of LCD panel
Figure 5−1 shows the relationship between the driving voltages such as liquid-crystal driving voltages V
Figures 5−2 shows
0.1 V
0.1 V
µ
0
” to V
PD160062 incorporates a 6-bit D/A converter whose odd output pins and even output pins output respectively
V
0.5 V
1
0.5 V
DD2
to V
63
V
V
V
COM
−0.1 V ≥ V
DD2
V
V
V
V
DD2
V
V
” is almost equivalent. For the 2 sets of five
DD2
V
V
V
SS2
V
1
2
3
4
5
6
8
0
7
3
9
Figure 5−1. Relationship between Input Data and
and V
≥ V
γ
5
-corrected power supply voltage and ladder resistors ratio and figure 5−3 shows the relationship
> V
6
00
0
to V
> V
6
> V
8
1
.
COM
> V
7
> V
, and
2
> V
8
> V
3
> V
γ
9
10
-corrected voltages V
≥ V
4
SS2
≥ 0.5 V
Data Sheet S16449EJ1V0DS
+0.1 V
DD2
Input data (HEX)
20
γ
-compensated power supplies, V
0
to V
γ
9
-corrected Power Supplies
and the input data. Be sure to maintain the
30
γ
-compensated voltages to V
γ
3F
0
-compensated power
www.DataSheet4U.com
to V
µ
4
Split interval
and V
DD2
PD160062
16
16
16
16
15
15
16
16
and V
0
’ to V
5
to V
SS2
63
9
’
,
,