ANALOG DEVICES ADD8710 Service Manual

www.BDTIC.com/ADI

10-Channel Gamma Buffer with V

COM

Driver

FEATURES

Single-supply operation: 4.5 V to 18 V
Upper/lower buffers swing to V
Gamma continuous output current: >10 mA
V

peak output current: 250 mA

COM

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

GENERAL DESCRIPTION

The ADD8710 is a low cost, 10-channel gamma buffer with a

driver that operates from a single supply. The part is

V

COM

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

utput current, and a high capacitive load drive capability. The

o
V

buffer is capable of delivering 250 mA of peak current and

COM

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 tempera-

ure range and is available in a Pb-free, 28-lead TSSOP package.

t

/GND

S

ADD8710

PIN CONFIGURATION

1

V

S

2

NC

3

OUT1

4

OUT2

5

OUT3

6

OUT4

7

OUT5

OUT6

OUT7

OUT8

OUT9

OUT10

OUTCOM

GND

NC = NO CONNECT

8

9

10

11

12

13

14

ADD8710

Figure 1. 28-Lead TSSOP (RU Suffix)

FUNCTIONAL BLOCK DIAGRAM

V

NC

OUT1

OUT2

OUT3

OUT4

OUT5

ADD8710

S

1

2

3

4

5

28

27

26

25

24

23

22

21

20

19

18

17

16

15

V

S

NC

IN1

IN2

IN3

IN4

IN5

IN6

IN7

IN8

IN9

IN10

INCOM

GND

V

S

NC

IN1

IN2

IN3

IN4

IN5

04889-001

Rev. B

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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.

OUT6

OUT7

OUT8

OUT9

OUT10

OUTCOM

GND

6

7

8

9

10

V

COM

IN6

IN7

IN8

IN9

IN10

INCOM

GND

04889-002

Figure 2.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2004–2007 Analog Devices, Inc. All rights reserved.

ADD8710

www.BDTIC.com/ADI

TABLE OF CONTENTS

Features.............................................................................................. 1

Applications....................................................................................... 1

General Description ......................................................................... 1

Pin Configuration............................................................................. 1

Functional Block Diagram .............................................................. 1

Revision History ............................................................................... 2

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

C

hanges to Specifications................................................................ 3

Change to Absolute Maximum Ratings......................................... 4

6/04—Revision 0: Initial Version

Absolute Maximum Ratings ............................................................4

Thermal Resistance.......................................................................4

ESD Caution...................................................................................4

Typical Performance Characteristics ..............................................5

Outline Dimensions....................................................................... 10

Ordering Guide .......................................................................... 10

Rev. B | Page 2 of 12

ADD8710

www.BDTIC.com/ADI

SPECIFICATIONS

VS = 16 V, VCM = VS/2, TA @ 25°C, unless otherwise noted.

Table 1.

Parameter Symbol Condition Min Typ Max Unit

INPUT CHARACTERISTICS Applies to all channels

Offset Voltage VOS 4 12 mV
Offset Voltage Drift ∆VOS/∆T −40°C ≤ TA ≤ +85°C 5 μV/°C
Input Bias Current IB 0.5 1.1 μA

−40°C ≤ TA ≤ +85°C 1.5 μA
Input Impedance ZIN 400 kΩ
Input Capacitance CIN 1 pF

BUFFER CHARACTERISTICS

Common-Mode Input Range V

Buffer 1 to Buffer 5 1.25 VS V

Buffer 6 to Buffer 10 0 VS − 1.25 V
Output Voltage High (V1) VOH V
V

−40°C ≤ TA ≤ +85°C 9.7 V
Output Voltage High (V2 to V5) VOH V

−40°C ≤ TA ≤ +85°C 8.4 V
Output Voltage High (V6 to V10) VOH V

−40°C ≤ TA ≤ +85°C 7.9 V
Output Voltage Low (V1 to V5) VOL V

−40°C ≤ TA ≤ +85°C 2.10 V
Output Voltage Low (V6 to V9) VOL V

−40°C ≤ TA ≤ +85°C 1.60 V
Output Voltage Low (V10) VOL V
V

−40°C ≤ TA ≤ +85°C 0.3 V
Continuous Output Current I
Peak Output Current IPK V

V

CHARACTERISTICS

COM

Common-Mode Input Range V
Output Voltage High VOH V

−40°C ≤ TA ≤ +85°C 7.9 V
Output Voltage Low VOL V

−40°C ≤ TA ≤ +85°C 2.10 V
Continuous Output Current I
Peak Output Current IPK V

SUPPLY CHARACTERISTICS

Supply Voltage VS 4.5 18 V
Power Supply Rejection Ratio PSRR VS = 4.5 V to 16.5 V, −40°C ≤ TA ≤ +85°C 70 90 dB
Total Supply Current ISY V

−40°C ≤ TA ≤ +85°C 11.5 mA
DYNAMIC PERFORMANCE

Slew Rate SR RL = 2 kΩ, CL = 200 pF 4 8 V/μs
Bandwidth BW −3 dB, RL = 10 kΩ, CL = 200 pF 5 MHz
Settling Time to 0.1% (Buffers) tS 1 V step, RL = 10 kΩ, CL = 200 pF 1.1 μs
Settling Time to 0.1% (V

) tS 1 V step, RL = 10 kΩ, CL = 200 pF 0.7 μs

COM

Phase Margin ΦO RL = 10 kΩ, CL = 200 pF 45 Degrees
Channel Separation 75 dB

CMM

= 16 V, VIN = 16 V, IL = 10 mA 15.82 15.9 V

S

= 10 V, VIN = 9.8 V, IL = 10 mA 9.75 9.8 V

S

= 10 V, VIN = 8.5 V, IL = 10 mA 8.45 8.5 V

S

= 10 V, VIN = 8 V, IL = 10 mA 7.95 8 V

S

= 10 V, VIN = 2 V, IL = 10 mA 2 2.05 V

S

= 10 V, VIN = 1.5 V, IL = 10 mA 1.5 1.55 V

S

= 16 V, VIN = 0 V, IL = 10 mA 0.1 0.175 V

S

= 10 V, VIN = 0.2 V, IL = 10 mA 0.2 0.25 V

S

10 mA

OUT

= 16 V 100 mA

S

0 VS − 1.25 V

CMM

= 10 V, VIN = 8 V, IL = 30 mA 7.95 8 V

S

= 10 V, VIN = 2 V, IL = 30 mA 2 2.05 V

S

35 mA

OUT

= 16 V 250 mA

S

= VS/2, no load 7.7 10 mA

O

Rev. B | Page 3 of 12

ADD8710

www.BDTIC.com/ADI

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Supply Voltage (VS) 18.5 V
Input Voltage −0.5 V to VS + 0.5 V
Storage Temperature Range −65°C to +150°C
Operating Temperature Range −40°C to +85°C
Junction Temperature Range −65°C to +150°C
Lead Temperature 300°C
ESD Tolerance (HBM) ±2500 V
ESD Tolerance (MM) ±200 V

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.

THERMAL RESISTANCE

θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.

Table 3. Thermal Resistance

Package Type θJA Unit

28-Lead TSSOP (RU) 67.7 °C/W

ESD CAUTION

Rev. B | Page 4 of 12