BUF11702
BUF07702
SLOS359F − MARCH 2001 − REVISED MAY 2004
MULTI CHANNEL LCD GAMMA CORRECTION BUFFER
FEATURES
D
Gamma Correction Channels: 10, 6
D
Integrated V
COM
Buffer
D
Excellent Output Current Drive:
− Gamma Channels: > 30mA at
0.5V Swing to Rails
(1)
− V
COM
: > 150mA at
5V Swing to Rails
(1)
Large Capacitive Load Drive Capability
Rail-to-Rail Output
PowerPAD Package
Low-Power/Channel: < 340µA
Wide Supply Range: 4.5V to 16V
Specified for 0°C to 85°C
High ESD Rating: 4kV
DESCRIPTION
The BUFxx702 are a series of multi-channel buffers
targeted towards gamma correction in high-resolution
LCD panels. The number of gamma correction
channels required depends on a variety of factors and
differs greatly from design to design. Therefore, various
channel options are offered. For additional space and
cost savings, a V
COM
channel with higher current drive
capability is integrated in the BUF11702 and
BUF07702.
The various buffers within the BUFxx702 are carefully
matched to the voltage I/O requirements for the gamma
correction application. Each buffer is capable of driving
heavy capacitive loads and offers fast load current
switching. The V
COM
channel has increased output
drive of > 100mA and can handle even larger capacitive
loads.
The BUF07702 and BUF11702 is available in the
TSSOP-PowerPAD package for dramatically
increased power dissipation capability. This way, a
large number of channels can be handled safely in one
package.
A flow-through pinout has been adopted to allow simple
PCB routing and maintain the cost-effectiveness of this
solution. All inputs and outputs of the BUFxx702
incorporate internal ESD protection circuits that prevent
functional failures at voltages up to 4kV (HBM) as
tested under MIL-STD-883C Method 3015.
D
D
D
D
D
D
D
(1) See typical characteristic curves for detail.
MODEL
BUF11702
BUF07702(1)
GAMMA
CHANNELS
10
6
VCOM CHANNELS
1
1
(1) The BUF07702 is not recommended for new designs. Informa-
tion is provided for reference only. For new designs, the pin-com-
patible BUF07703 is recommended; more information can be
found at www.ti.com.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments Incorporated. All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
2001−2004, Texas Instruments Incorporated
www.ti.com
BUF11702
BUF07702
www.ti.com
SLOS359F − MARCH 2001 − REVISED MAY 2004
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1)
PARAMETERS
Supply, VDD(2)
Input Voltage Range, VI
Continuous Total Power Dissipation
Operating Free-Air Temperature Range, TA
Maximum Junction Temperature, TJ
Storage Temperature Range, TSTG
BUFXX702
16.5
VDD
See Dissipation
Rating Table
0 to 85
150
−65 to 150
UNIT
V
V
°C
°C
°C
Lead Temperature 1.6mm (1/16 inch) from case for 10s
260
°C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to GND.
ORDERING INFORMATION
PRODUCT
BUF11702
BUF11702
BUF07702(2)
PACKAGE−LEAD
TSSOP−28
TSSOP−28
TSSOP−20
PACKAGE
DESIGNATOR(1)
PWP
PWP
PWP
SPECIFIED
TEMPERATURE
RANGE
0°C to +85°C
0°C to +85°C
0°C to +85°C
ORDERING
NUMBER
BUF11702PWP
BUF11702PWPR
BUF07702PWP
TRANSPORT MEDIA,
QUANTITY
Tube, 50
Reels, 2000
Tube, 70
BUF07702(2)
TSSOP−20
PWP
0°C to +85°C
BUF07702PWPR
Reels, 2000
(1) For the most current specification and package information, refer to the Package Option Addendum at the end of this data sheet.
(2) The BUF07702 is not recommended for new designs. For new designs, the pin-compatible BUF07703 is recommended.
DISSIPATION RATING TABLE
PACKAGE TYPE
TSSOP−28
TSSOP−20(3)
PACKAGE
DESIGNATOR
PWP (28)
PWP (20)
q
JC
(°C/W)
0.72
1.40
q
JA(1)
(°C/W)
27.9
26.1
TA
≤
25°C(2)
POWER RATING
3.5 W
3.8 W
(1) With 2oz trace and PowerPAD soldered to copper landing pad.
(2) TJ = 125°C.
(3) The BUF07702 is not recommended for new designs. For new designs, the pin-compatible BUF07703 is recommended.
RECOMMENDED OPERATING CONDITIONS
MIN
Supply Voltage, VDD
Operating Free-Air Temperature, TA
4.5
0
NOM
MAX
16
85
UNIT
V
°C
2
BUF11702
BUF07702
www.ti.com
SLOS359F − MARCH 2001 − REVISED MAY 2004
EQUIVALENT SCHEMATICS OF INPUTS AND OUTPUTS
INPUT STAGE OF BUFFERS
BUF11702: 1 to 5 and VCOM
BUF07702: 1 to 3 and VCOM
VS
Next
Stage
Buffer
Input
Buffer
Output
Internal to
BUF11702
GND
Internal to
BUF11702
VS
Buffer
Input
Buffer
Output
Next Stage
INPUT STAGE OF BUFFERS
BUF11702: 6 to 10
BUF07702: 4 to 6
OUTPUT STAGE OF ALL BUFFERS
VS
Previous
Stage
Inverting
Input
Previous
Stage
GND
Buffer
Output
GND
ELECTRICAL CHARACTERISTICS
Over operating free-air temperature range, VDD = 4.5V to 16V, TA = 25°C, unless otherwise noted.
PARAMETER
VIO
Input offset voltage
TEST CONDITIONS
VI = VDD/2, RS = 50
Ω
TA
25°C
Full
Range(1)
25°C
IIB
Input bias current
VI = VDD/2
Full
Range(1)
25°C
kSVR
Supply voltage rejection ratio (∆VDD/∆VIO)
Buffer gain
BW_3dB
SR
3dB bandwidth
Slew rate
Gamma buffers
VCOM buffer
Gamma buffers
VCOM buffer
VDD = 4.5 V to 16 V
VI = 5 V
CL = 100 pF, RL = 2 kΩ
CL = 100 pF, RL = 2 kΩ
VIN = 2V to 8V
IO = 0 to
±5
mA, VO = 5 V
CL = 100 pF tT = 0.1
µs
See Figure 2
IO = 0 to −5 mA VO = 5 V
CL = 100 pF RL = 2 kΩ
IO = 0 to +5 mA VO = 5 V
CL = 100 pF RL = 2 kΩ
VI = 4.5 V to 5.5 V 0.1%
VI = 5.5 V to 4.5 V 0.1%
VI = 4.5 V to 5.5 V 0.1%
VI = 5.5 V to 4.5 V 0.1%
VI = 5 V f = 1 kHz
VIP−P = 6 V, f = 1 kHz
Full
Range(1)
25°C
25°C
25°C
25°C
25°C
Full
Range(1)
Full
Range(1)
62
60
0.9995
1
0.6
1
0.7
900
160
1
2
6
4.6
5.8
5.6
45
40
85
1
200
80
dB
V/V
MHz
V/µs
mV
mV
µs
µs
µs
µs
nV/Hz
dB
pA
MIN
TYP
1.5
MAX
12
15
mV
UNIT
Transient load regulation
Transient load response
tS (I−sink)
tS (I−src)
Settling time-current
Settling time-current
Gamma buffers
VCOM buffer
Gamma buffers
VCOM buffer
tS
Settling time-
voltage
25°C
Vn
Noise voltage
25°C
25°C
Crosstalk
(1) Full Range is 0°C to 85°C.
3
Analog electronics
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