参数资料
型号: BUF20820EVM
厂商: Texas Instruments
文件页数: 14/29页
文件大小: 0K
描述: EVAL MOUDLE FOR BUF20820
标准包装: 1
系列: *
BUF20820
SBOS330E DECEMBER 2005 REVISED OCTOBER 2008
www.ti.com
21
TOTAL TI PANEL SOLUTION
In addition to the BUF20820 programmable voltage
reference, TI offers a complete set of ICs for the LCD panel
market, including gamma correction buffers, various
power-supply solutions, and audio power solutions. See
Figure 19 for the total IC solution from TI.
THE BUF20820 IN INDUSTRIAL
APPLICATIONS
The wide supply range, high output current, and very low
cost make the BUF20820 attractive for a range of medium
accuracy industrial applications such as programmable
power supplies, multi-channel data acquisition systems,
data
loggers,
sensor
excitation
and
linearization,
power-supply generation, and others. Each DAC channel
features 1LSB DNL and INL.
Many systems require different levels of biasing and power
supply for various components as well as sensor
excitation, control-loop set-points, voltage outputs, current
outputs, and other functions. The BUF20820, with its 20
total programmable DAC channels, provides great
flexibility to the entire system by allowing the designer to
change all these parameters via software.
Figure 20 provides various ideas on how the BUF20820
can be used in applications. A micro-controller with
two-wire serial interface controls the various DACs of the
BUF20820. The BUF20820 can be used for:
D sensor excitation
D programmable bias/reference voltages
D variable power-supplies
D high-current voltage output
D 4-20mA output
D set-point generators for control loops.
NOTE: At power-up, the output voltages of the BUF20820
DACs are configured to the programmed OTP memory
values, or (VREFH VREFL)/2 if the OTP values have not been
programmed.
2.7 V5 V
3.3 V
nn
26 V
14 V
15 V
TPA3005D2
TPA3008D2
Audio
Speaker
Driver
Logic and
Timing
Controller
HighResolution
TFTLCS Panel
Source Driver
Gamma Correction
BUF20820
V
COM
Ga
te
D
ri
v
e
r
TPS651xx
LCD
Supply
Figure 19. TI LCD Solution
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