Analog Devices ADD8710 a Datasheet

10-Channel Gamma Buffer

FEATURES

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

peak output current: 250 mA

V

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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
V

driver that operates from a single supply. The part is

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

buffer is capable of delivering 250 mA of peak current and

V

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can also drive large capacitive loads. The ADD8710 offers 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.

/GND

S

with V

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ADD8710

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

OUT6

OUT7

ADD8710

S

1

2

3

4

5

6

7

28

V

S

27

NC

26

IN1

25

IN2

24

IN3

23

IN4

22

IN5

21

IN6

20

IN7

19

IN8

18

IN9

17

IN10

16

INCOM

15

GND

04889-001

V

S

NC

IN1

IN2

IN3

IN4

IN5

IN6

IN7

Driver

Rev. A

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.

OUT8

OUT9

OUT10

OUTCOM

GND

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

8

9

10

V

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Figure 2.

IN8

IN9

IN10

INCOM

GND

Tel: [phone] www.analog.com
Fax: [phone] © 2005 Analog Devices, Inc. All rights reserved.

04889-002

ADD8710

TABLE OF CONTENTS

Electrical Characteristics ................................................................. 3

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

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

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

REVISION HISTORY

13/05—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

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

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

Rev. A | Page 2 of 12

ADD8710

ELECTRICAL CHARACTERISTICS

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

Buffers 1 to 5 1.25 VS V
Buffers 6 to 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

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Common-Mode Input Range V
Output Voltage High VOH V

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

−40°C ≤ TA ≤ +85°C 2.10
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

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Phase Margin Øo RL = 10 kΩ, CL = 200 pF 45 Degree
Channel Separation 75 dB

CMM

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

S

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

S

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

S

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

S

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

S

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

S

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

S

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

S

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

S

35 mA

OUT

= 16 V 250 mA

S

= VS/2, no load 7.7 10 mA

O

Rev. A | Page 3 of 12

ADD8710

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 Range 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.

Table 3. Package Characteristics

Package Type θ

28-Lead TSSOP (RU) 67.7 °C/W

1

θJA is specified for worst-case conditions, i.e., θJA is specified for devices

soldered onto a circuit board for surface-mount packages.

1

Unit

JA

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

Rev. A | Page 4 of 12