10-Channel Gamma Buffer with VCOM Driver
ADD8710
Single-supply operation: 4.5 V to 18 V
Upper/lower buffers swing to VS/GND
Gamma continuous output current: >10 mA
VCOM peak output current: 250 mA
Offset voltage: 12 mV
Slew rate: 8 V/μs
Unity gain stable with large capacitive loads
Supply current: 700 μA per amplifier
Compact 28-lead TSSOP
Pb-free package
Drop-in replacement for BUF11702
APPLICATIONS
TFT LCD monitor panels
TFT LCD notebook panels
PIN CONFIGURATION
VS
VS
1
28
NC 2
27
NC
OUT1 3
26
IN1
OUT2 4
25
IN2
OUT3 5
24
IN3
OUT4 6
23
IN4
OUT5 7
22
IN5
21
IN6
OUT7 9
20
IN7
OUT8 10
19
IN8
OUT9 11
18
IN9
OUT10 12
17
IN10
OUTCOM 13
16
INCOM
GND 14
15
GND
OUT6 8
ADD8710
NC = NO CONNECT
04889-001
FEATURES
Figure 1. 28-Lead TSSOP (RU Suffix)
The ADD8710 is a low cost, 10-channel gamma buffer with a
VCOM driver that operates from a single supply. The part is
designed for high resolution TFT LCD panels and is built on an
advanced, high voltage CBCMOS process.
The gamma buffers have a high slew rate, minimum 10 mA
output current, and a high capacitive load drive capability. The
VCOM buffer is capable of delivering 250 mA of peak current and
can also drive large capacitive loads. The ADD8710 offers a
wide supply range and offset voltages below 12 mV.
The ADD8710 is specified over the −40°C to +85°C temperature range and is available in a Pb-free, 28-lead TSSOP package.
FUNCTIONAL BLOCK DIAGRAM
VS
ADD8710
NC
VS
NC
OUT1
1
IN1
OUT2
2
IN2
OUT3
3
IN3
OUT4
4
IN4
OUT5
5
IN5
OUT6
6
IN6
OUT7
7
IN7
OUT8
8
IN8
OUT9
9
IN9
OUT10
10
IN10
OUTCOM
VCOM
GND
INCOM
GND
04889-002
GENERAL DESCRIPTION
Figure 2.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2004–2007 Analog Devices, Inc. All rights reserved.
ADD8710
TABLE OF CONTENTS
Features .............................................................................................. 1
Absolute Maximum Ratings ............................................................4
Applications....................................................................................... 1
Thermal Resistance .......................................................................4
General Description ......................................................................... 1
ESD Caution...................................................................................4
Pin Configuration............................................................................. 1
Typical Performance Characteristics ..............................................5
Functional Block Diagram .............................................................. 1
Outline Dimensions ....................................................................... 10
Revision History ............................................................................... 2
Ordering Guide .......................................................................... 10
Specifications..................................................................................... 3
REVISION HISTORY
6/07—Rev. A to Rev. B
Changes to Figure 18........................................................................ 7
3/05—Rev. 0 to Rev. A
Change to Features ........................................................................... 1
Changes to Specifications ................................................................ 3
Change to Absolute Maximum Ratings......................................... 4
6/04—Revision 0: Initial Version
Rev. B | Page 2 of 12
ADD8710
SPECIFICATIONS
VS = 16 V, VCM = VS/2, TA @ 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Offset Voltage Drift
Input Bias Current
Symbol
VOS
∆VOS/∆T
IB
Condition
Applies to all channels
Min
−40°C ≤ TA ≤ +85°C
Typ
Max
Unit
4
5
0.5
12
mV
μV/°C
μA
μA
kΩ
pF
−40°C ≤ TA ≤ +85°C
Input Impedance
Input Capacitance
BUFFER CHARACTERISTICS
Common-Mode Input Range
Buffer 1 to Buffer 5
Buffer 6 to Buffer 10
Output Voltage High (V1)
ZIN
CIN
VOH
VOH
Output Voltage High (V6 to V10)
VOH
Output Voltage Low (V1 to V5)
VOL
Output Voltage Low (V6 to V9)
VOL
Output Voltage Low (V10)
VOL
Continuous Output Current
Peak Output Current
VCOM CHARACTERISTICS
Common-Mode Input Range
Output Voltage High
IOUT
IPK
Continuous Output Current
Peak Output Current
SUPPLY CHARACTERISTICS
Supply Voltage
Power Supply Rejection Ratio
Total Supply Current
DYNAMIC PERFORMANCE
Slew Rate
Bandwidth
Settling Time to 0.1% (Buffers)
Settling Time to 0.1% (VCOM)
Phase Margin
Channel Separation
400
1
VCMM
Output Voltage High (V2 to V5)
Output Voltage Low
1.1
1.5
VCMM
VOH
VOL
IOUT
IPK
VS
PSRR
ISY
SR
BW
tS
tS
ΦO
VS = 16 V, VIN = 16 V, IL = 10 mA
VS = 10 V, VIN = 9.8 V, IL = 10 mA
−40°C ≤ TA ≤ +85°C
VS = 10 V, VIN = 8.5 V, IL = 10 mA
−40°C ≤ TA ≤ +85°C
VS = 10 V, VIN = 8 V, IL = 10 mA
−40°C ≤ TA ≤ +85°C
VS = 10 V, VIN = 2 V, IL = 10 mA
−40°C ≤ TA ≤ +85°C
VS = 10 V, VIN = 1.5 V, IL = 10 mA
−40°C ≤ TA ≤ +85°C
VS = 16 V, VIN = 0 V, IL = 10 mA
VS = 10 V, VIN = 0.2 V, IL = 10 mA
−40°C ≤ TA ≤ +85°C
1.25
0
15.82
9.75
9.7
8.45
8.4
7.95
7.9
RL = 2 kΩ, CL = 200 pF
−3 dB, RL = 10 kΩ, CL = 200 pF
1 V step, RL = 10 kΩ, CL = 200 pF
1 V step, RL = 10 kΩ, CL = 200 pF
RL = 10 kΩ, CL = 200 pF
Rev. B | Page 3 of 12
8.5
8
1.5
0.1
0.2
0.3
10
100
0
7.95
7.9
2.05
2.10
1.55
1.60
0.175
0.25
VS − 1.25
8
2
2.05
2.10
35
250
VS = 16 V
VS = 4.5 V to 16.5 V, −40°C ≤ TA ≤ +85°C
VO = VS/2, no load
−40°C ≤ TA ≤ +85°C
15.9
9.8
2
VS = 16 V
VS = 10 V, VIN = 8 V, IL = 30 mA
−40°C ≤ TA ≤ +85°C
VS = 10 V, VIN = 2 V, IL = 30 mA
−40°C ≤ TA ≤ +85°C
VS
VS − 1.25
4.5
70
4
18
90
7.7
8
5
1.1
0.7
45
75
10
11.5
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
mA
mA
V
V
V
V
V
mA
mA
V
dB
mA
mA
V/μs
MHz
μs
μs
Degrees
dB
ADD8710
ABSOLUTE MAXIMUM RATINGS
THERMAL RESISTANCE
Table 2.
Parameter
Supply Voltage (VS)
Input Voltage
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature
ESD Tolerance (HBM)
ESD Tolerance (MM)
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Rating
18.5 V
−0.5 V to VS + 0.5 V
−65°C to +150°C
−40°C to +85°C
−65°C to +150°C
300°C
±2500 V
±200 V
Table 3. Thermal Resistance
Package Type
28-Lead TSSOP (RU)
ESD CAUTION
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods may
affect device reliability.
Rev. B | Page 4 of 12
θJA
67.7
Unit
°C/W
ADD8710
TYPICAL PERFORMANCE CHARACTERISTICS
800
0.7
T = 25°C
VS = 4.5V TO 16V
SUPPLY CURRENT/BUFFER (mA)
700
500
400
300
200
0.5
0.4
0.3
0.2
0.1
–8 –7 –6 –5 –4 –3 –2 –1 0 1 2
VOS (mV)
3
4
5
6
7
8
04889-003
100
0
0.6
0
0
2
4
6
8
10
12
SUPPLY VOLTAGE (V)
14
16
18
04889-006
NUMBER OF UNITS
600
Figure 6. Supply Current/Buffer vs. Supply Voltage
Figure 3. Input Offset Voltage Distribution
1.0
300
0.9
SUPPLY CURRENT/BUFFER (mA)
NUMBER OF UNITS
250
200
150
100
50
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0
–40
2
INPUT BIAS CURRENT (nA)
3
20
40
60
80
TEMPERATURE (°C)
100
V1
V2
V3
V4
V5
V6
600
1
0
–1
–2
120
400
V7
V8
V9
V10
VCOM
200
0
–200
–4
–40
–20
0
80
60
40
20
TEMPERATURE (°C)
100
120
–400
–40
Figure 5. Input Offset Voltage vs. Temperature
–20
0
80
60
40
20
TEMPERATURE (°C)
100
Figure 8. Input Bias Current vs. Temperature
Rev. B | Page 5 of 12
120
04889-008
–3
04889-005
INPUT OFFSET VOLTAGE (mV)
V7
V8
V9
V10
VCOM
V1
V2
V3
V4
V5
V6
4
0
Figure 7. Supply Current/Buffer vs. Temperature
Figure 4. Input Offset Voltage Drift Distribution
5
–20
04889-007
TCVOS (µV/°C)
04889-004
0
3
6
9
12
15
18
21
24
27
30
33
36
39
42
45
48
51
54
57
60
63
66
69
72
75
78
0.1
ADD8710
1.0
125
105
0.8
95
35
15
–5
0.6
0.5
0.4
0.3
–25
0.2
–45
0.1
1k
10k
100k
1M
10M
FREQUENCY (Hz)
0
04889-009
–65
100
1
10
100
LOAD CURRENT (mA)
04889-012
VCOM
55
(dB)
0.7
OUTPUT VOLTAGE (V)
75
Figure 12. Channel VCOM Output Voltage Low vs. Load Current
Figure 9. Power Supply Rejection Ratio vs. Frequency
16.2
2.5
VIN = 0V
VIN = 16V
16.0
15.8
2.0
15.6
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
VIN = 0V
0.9
V1–V10
1.5
1.0
15.4
15.2
15.0
14.8
14.6
0.5
10
100
LOAD CURRENT (mA)
14.2
04889-010
1
9.99
1.0
9.98
OUTPUT VOLTAGE (V)
0.6
0.4
VIN = 10V
9.97
9.96
9.95
9.94
0.2
10
LOAD CURRENT (mA)
100
9.93
04889-011
1
Figure 11. Channel 6 to Channel 10 Output Voltage Low vs. Load Current
1
10
LOAD CURRENT (mA)
100
04889-014
OUTPUT VOLTAGE (V)
10.00
VIN = 0V
0.8
100
Figure 13. Channel 1 Output Voltage High vs. Load Current
1.2
0
10
LOAD CURRENT (mA)
Figure 10. Channel 1 to Channel 5 Output Voltage Low vs. Load Current
1.4
1
04889-013
14.4
0
Figure 14. Channel 2 to Channel 5 Output Voltage High vs. Load Current
Rev. B | Page 6 of 12
ADD8710
11
RL = 2kΩ
CL = 100pF
VOLTAGE (2V/DIV)
OUTPUT VOLTAGE (V)
9
7
5
3
1
10
100
LOAD CURRENT (mA)
TIME (2µs/DIV)
Figure 18. Large Signal Transient Response
Figure 15. Channel 6 to Channel 10 Output Voltage High vs. Load Current
10.00
04889-018
1
04889-015
VIN = 10V
–1
20
VIN = 10V
9.99
10
9.98
0
9.97
–10
9.96
–20
140pF
90pF
–40
9.93
–50
9.92
–60
9.91
–70
10
100
LOAD CURRENT (mA)
–80
100k
Figure 16. Channel VCOM Output Voltage High vs. Load Current
1M
10M
FREQUENCY (Hz)
Figure 19. Channel 1 to Channel 5 Frequency Response vs. Capacitive Loading
20
RL = 2kΩ
CL = 100pF
10
140pF
90pF
0
VOLTAGE (50mV/DIV)
40pF
–10
1040pF
(dB)
–20
510pF
–30
–40
–50
–60
–70
Figure 17. Small Signal Transient Response
04889-017
TIME (2µs/DIV)
–80
100k
1M
FREQUENCY (Hz)
10M
04889-020
1
510pF
–30
9.94
9.90
1040pF
04889-019
(dB)
9.95
04889-016
OUTPUT VOLTAGE (V)
40pF
Figure 20. Channel 6 to Channel 10 Frequency Response vs. Capacitive Loading
Rev. B | Page 7 of 12
ADD8710
20
10
140pF
10
5
90pF
0
40pF
–10
1040pF
–20
–50
–25
–60
–30
–70
–35
1M
10M
–40
100k
1M
10M
100M
FREQUENCY (Hz)
Figure 21. Channel VCOM Frequency Response vs. Capacitive Loading
04889-024
(dB)
–15
–40
04889-021
Figure 24. Channel VCOM Frequency Response vs. Resistive Loading
10
750
5
2kΩ
10kΩ
1kΩ
0
–5
675
560Ω
600
525
IMPEDANCE (Ω)
150Ω
–10
–15
–20
375
300
–25
225
–30
150
–35
75
10M
100M
FREQUENCY (Hz)
VCOM
0
100
04889-022
1M
GAMMA
450
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 22. Channel 1 to Channel 5 Frequency Response vs. Resistive Loading
04889-025
(dB)
510pF
–30
FREQUENCY (Hz)
(dB)
150Ω
–10
–80
100k
Figure 25. Closed-Loop Output Impedance vs. Frequency
10
70
2kΩ
10kΩ
5
60
1kΩ
560Ω
0
VIN = 100mV p-p
AV = 1
RL = 10kΩ
50
–5
OVERSHOOT (%)
150Ω
–10
(dB)
2kΩ
1kΩ
560Ω
–5
–20
–40
100k
10kΩ
0
–15
–20
–25
40
–OS
30
+OS
20
–30
1M
10M
FREQUENCY (Hz)
100M
0
10
04889-023
–40
100k
Figure 23. Channel 6 to Channel 10 Frequency Response vs. Resistive Loading
100
CAPACITIVE LOAD (pF)
1000
04889-026
10
–35
Figure 26. Channel 1 to Channel 5 Small Signal Overshoot vs. Load Capacitance
Rev. B | Page 8 of 12
ADD8710
60
70
60
VIN = 100mV p-p
AV = 1
RL = 10kΩ
50
VIN = 100mV p-p
AV = 1
RL = 10kΩ
–OS
–OS
40
30
+OS
+OS
40
OVERSHOOT (%)
OVERSHOOT (%)
50
30
20
20
100
CAPACITIVE LOAD (pF)
1000
0
10
04889-027
0
10
Figure 27. Channel 6 to Channel 10 Small Signal Overshoot vs. Load Capacitance
100
1000
CAPACITIVE LOAD (pF)
Figure 28. Channel VCOM Small Signal Overshoot vs. Load Capacitance
Rev. B | Page 9 of 12
04889-028
10
10
ADD8710
OUTLINE DIMENSIONS
9.80
9.70
9.60
28
15
4.50
4.40
4.30
1
6.40 BSC
14
PIN 1
0.65
BSC
0.15
0.05
COPLANARITY
0.10
0.30
0.19
1.20 MAX
SEATING
PLANE
0.20
0.09
8°
0°
0.75
0.60
0.45
COMPLIANT TO JEDEC STANDARDS MO-153-AE
Figure 29. 28-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-28)
Dimensions shown in millimeters
ORDERING GUIDE
Model
ADD8710ARUZ 1
ADD8710ARUZ-REEL1
1
Temperature Range
−40°C to +85°C
−40°C to +85°C
Package Description
28-Lead TSSOP
28-Lead TSSOP
Z = RoHS Compliant Part.
Rev. B | Page 10 of 12
Package Option
RU-28
RU-28
ADD8710
NOTES
Rev. B | Page 11 of 12
ADD8710
NOTES
©2004–2007 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D04889-0-6/07(B)
Rev. B | Page 12 of 12