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TSC2007 Scheda tecnica(PDF) 32 Page - Texas Instruments

Il numero della parte TSC2007
Spiegazioni elettronici  TSC2007-Q1 1.2-V to 3.6-V, 12-Bit, Nanopower, 4-Wire Micro Touch-Screen Controller With I2C Interface
PDF  43 Pages
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Produttore elettronici  TI2 [Texas Instruments]
Homepage  https://www.ti.com
Logo TI2 - Texas Instruments

TSC2007 Scheda tecnica(HTML) 32 Page - Texas Instruments

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Panel Resistance ( )
200
400
600
800
1000 1200 1400 1600 1800 2000
0
2
4
6
8
10
12
14
16
18
V
= 1.6 VDC
DD
V
= 2.5 VDC
DD
V
= 3 VDC
DD
V
= 3.6 VDC
DD
32
TSC2007-Q1
SBAS545A – SEPTEMBER 2011 – REVISED DECEMBER 2016
www.ti.com
Product Folder Links: TSC2007-Q1
Submit Documentation Feedback
Copyright © 2011–2016, Texas Instruments Incorporated
Typical Application (continued)
Figure 37 only shows the ideal TSC driving condition where the internal resistance of the TSC is ignored
because the resistance is small (5 to 6 Ω) compared to the resistance of the touch panel (hundreds to thousands
of Ω). Therefore the actual power consumption may be less than that shown in Figure 37.
A user can reduce power consumption in three ways:
•
Using touch screens with higher resistance
•
Using a low-power supply (VDD) to the TSC
•
Reducing the driver on-time or the on-off ratio of the driver
Touch panels with higher resistance are likely to cause more noise and longer settling time which limits the
options for users.
The TSC2007-Q1 device is designed with a power supply (VDD) range from 1.2 V to 3.6 V.
8.2.3 Application Curve
Figure 37. Touch-Panel Power Consumption



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