UPD16716 查看數據表（PDF） - NEC => Renesas Technology
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UPD16716 Datasheet PDF : 20 Pages
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µ PD16716
5. RELATIONSHIP BETWEEN INPUT DATA AND OUTPUT VOLTAGE VALUE
This product incorporates a 6-bit D/A converter whose odd output pins and even output pins output respectively
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.
The ladder resistors (r0 to r62) are designed so that the ratio of LCD panel γ -compensated voltages to V0’ to V63’
and V0’’ to V63’’ is almost equivalent. For the 2 sets of five γ -compensated power supplies, V0 to V4 and V5 to V9,
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 γ -compensated power
supplies V1 to V3 and V6 to V8.
Figure 5−1 shows the relationship between the driving voltages such as liquid-crystal driving voltages VDD2 and
VSS2, common electrode potential VCOM, and γ -corrected voltages V0 to V9 and the input data. Be sure to maintain
the voltage relationships as follows:
VDD2 – 0.1 V ≥ V0 > V1 > V2 > V3 > V4 ≥ 0.5 VDD2 ≥ V5 > V6 > V7 > V8 > V9 ≥ VSS2 + 0.1 V.
Figures 5−2 and 5−3 show the relationship between input data and output voltage. This driver IC is designed for
only single-sided mounting
Figure 5−1. Relationship between Input Data and γ - corrected Power Supply
0.1 V
VDD2
V0
16
V1
16
V2
16
V3
15
V4
0.5 VDD2
V5
V6
V7
V8
0.1 V
V9
VSS2
00
10
20
30
Input data (HEX)
Split interval
15
16
16
16
3F
6
Data Sheet S14417EJ1V1DS
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