Datasheet ADD8710 Datasheet (Analog Devices)

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

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
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

COM

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

COM

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

COM

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

COM

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

COM

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

ADD8710

TYPICAL PERFORMANCE CHARACTERISTICS

800

700

600

500

400

300

NUMBER OF UNITS

200

100

T = 25°C

= 4.5V TO 16V

V

DD

0.7

0.6

0.5

0.4

0.3

0.2

SUPPLY CURRENT/BUFFER (mA)

0.1

0

–8 8–7 7–6 6–5 5–4 4–3 3–2 2–1 10

V

(mV)

OS

Figure 3. Input Offset Voltage

300

250

200

150

100

NUMBER OF UNITS

50

0

6

9

3

121518

3

3

39

TCVOS (µV/°C)

Figure 4. Input Offset Voltage Drift Distribution

0

04889-003

0 2 4 6 8 10 12 14 16 18

SUPPLY VOLTAGE (V)

04889-006

Figure 6. Supply Current/Buffer vs. Supply Voltage

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

SUPPLY CURRENT/BUFFER (mA)

0.1

4

42

603657

485145

5

78

752172246927663063

04889-004

0

TEMPERATURE (°C)

120–40 –20 0 20 40 60 80 100

04889-007

Figure 7. Supply Current/Buffer vs. Temperature

5

4

3

2

1

0

–1

–2

INPUT OFFSET VOLTAGE (mV)

–3

–4

–40

–20

020

40

TEMPERATURE (°C)

80

60

Figure 5. Input Offset Voltage vs. Temperature

V7

V1

V8

V2

V9

V3

V10

V4

V

V5

COM

V6

120

100

04889-005

600

400

200

INPUT BIAS CURRENT (nA)

–200

–400

0

–40

–20

020

TEMPERATURE (°C)

60

40

Figure 8. Input Bias Current vs. Temperature

V1

V7

V2

V8

V3

V9

V4

V10

V5

V

COM

V6

100

120

04889-008

80

Rev. A | Page 5 of 12

ADD8710

125

105

95

75

V

55
35

(dB)

15

–5
–25

–45
–65

Figure 9. Power Supply Rejection Ratio vs. Frequency

COM

V1–V10

100k10k1k100 1M 10M

FREQUENCY (Hz)

04889-009

1.0
VIN = 0V

0.9

0.8

0.7

0.6

0.5

0.4

0.3

OUTPUT VOLTAGE (V)

0.2

0.1

0

Figure 12. Channel V

101 100

LOAD CURRENT (mA)

Output Voltage Low vs. I Load

COM

04889-012

2.5
VIN = 0V

2.0

1.5

1.0

OUTPUT VOLTAGE (V)

0.5

0

101 100

LOAD CURRENT (mA)

Figure 10. Channels 1 to 5 Output Voltage Low vs. I Load

1.4

VIN = 0V

1.2

1.0

0.8

04889-010

16.2

16.0

15.8

15.6

15.4

15.2

15.0

14.8

OUTPUT VOLTAGE (V)

14.6

14.4

14.2

Figure 13. Channel 1 Output Voltage High vs. I Load

10.00

9.99

9.98

9.97

101 100

LOAD CURRENT (mA)

VIN = 16V

VIN = 10V

04889-013

0.6

OUTPUT VOLTAGE (V)

0.4

0.2

0

101 100

LOAD CURRENT (mA)

Figure 11. Channels 6 to 10 Output Voltage Low vs. I Load

04889-011

Rev. A | Page 6 of 12

9.96

OUTPUT VOLTAGE (V)

9.95

9.94

9.93
101 100

LOAD CURRENT (mA)

Figure 14. Channels 2 to 5 Output Voltage High vs. I Load

04889-014

ADD8710

11

9

7

5

RL = 2kΩ
C

LOAD

= 100pF

3

OUTPUT VOLTAGE (V)

1

VIN = 10V

–1

101 100

LOAD CURRENT (mA)

Figure 15. Channels 6 to 10 Output Voltage High vs. I Load

10.00

9.99

9.98

9.97

9.96

9.95

9.94

9.93

OUTPUT VOLTAGE (V)

9.92

9.91

9.90

Figure 16. Channel V

101 100

LOAD CURRENT (mA)

Output Voltage High vs. I Load

COM

VIN = 10V

04889-015

04889-016

VOLTAGE (4V/DIV)

TIME (2µs/DIV)

Figure 18. Large-Signal Transient Response

20

10

0

–10
–20
–30

(dB)

–40
–50
–60

–70
–80

100k 1M 10M

1040pF

510pF

FREQUENCY (Hz)

140pF

90pF

40pF

Figure 19. Channels 1 to 5 Frequency Response vs. Capacitive Loading

04889-018

04889-019

RL = 2kΩ
C

= 100pF

LOAD

VOLTAGE (50mV/DIV)

TIME (2µs/DIV)

04889-017

Figure 17. Small-Signal Transient Response

20

10

0

–10
–20
–30

(dB)

–40
–50
–60

–70
–80

100k 1M 10M

1040pF

510pF

FREQUENCY (Hz)

140pF

90pF
40pF

Figure 20. Channels 6 to 10 Frequency Response vs. Capacitive Loading

04889-020

Rev. A | Page 7 of 12

ADD8710

20

10

0

–10
–20
–30

(dB)

–40
–50
–60

–70
–80

100k 1M 10M

Figure 21. Channel V

Frequency Response vs. Capacitive Loading

COM

1040pF

FREQUENCY (Hz)

510pF

140pF

90pF
40pF

04889-021

10

5
0

–5
–10
–15

(dB)

–20
–25
–30

–35
–40

100k

Figure 24. Channel V

10kΩ

150Ω

1M 10M 100M

FREQUENCY (Hz)

Frequency Response vs. Resistive Loading

COM

2kΩ

1kΩ

560Ω

04889-024

10

(dB)

–10
–15

–20
–25
–30

–35
–40

–5

5
0

100k

10kΩ

1M 10M 100M

FREQUENCY (Hz)

2kΩ

1kΩ

560Ω

150Ω

Figure 22. Channels 1 to 5 Frequency Response vs. Resistive Loading

10

2kΩ

10kΩ

150Ω

FREQUENCY (Hz)

1kΩ

560Ω

(dB)

–10
–15

–20
–25
–30

–35
–40

–5

5

0

100k

1M 10M 100M

Figure 23. Channels 6 to 10 Frequency Response vs. Resistive Loading

04889-022

04889-023

750

675

600

525

450

375

300

IMPEDANCE (Ω)

225

150

75

0

100

FREQUENCY (Hz)

100k10k1k 1M 10M

GAMMA

V

COM

Figure 25. Closed-Loop Output Impedance vs. Frequency

70

VIN = 100mV p-p
A

= 1

V

60

R

= 10kΩ

L

50

40

30

OVERSHOOT (%)

20

10

0

CAPACITIVE LOAD (pF)

–OS

+OS

10010 1000

Figure 26. Channels 1 to 5 Small-Signal O vershoot vs. Load Capacitance

04889-025

04889-026

Rev. A | Page 8 of 12

ADD8710

70

VIN = 100mV p-p
A

= 1

V

60

R

= 10kΩ

L

50

40

30

OVERSHOOT (%)

20

–OS

+OS

60

VIN = 100mV p-p
A

= 1

V

R

= 10kΩ

L

50

40

30

OVERSHOOT (%)

20

–OS

+OS

10

0

10010 1000

CAPACITIVE LOAD (pF)

Figure 27. Channels 6 to 10 Small-Signal Overshoot vs. Load Capacitance

04889-027

10

0

Figure 28. Channel V

10010 1000

CAPACITIVE LOAD (pF)

Small-Signal Overshoot vs. Load Capacitance

COM

04889-028

Rev. A | Page 9 of 12

ADD8710

OUTLINE DIMENSIONS

9.80

9.70

9.60

28

PIN 1

0.15

0.05

COPLANARITY

0.10

0.65
BSC

0.30

0.19

COMPLIANT TO JEDEC STANDARDS MO-153AE

1.20 MAX

SEATING

PLANE

15

4.50

4.40

4.30

0.20

0.09

6.40 BSC

8°
0°

0.75

0.60

0.45

141

Figure 29. 28-Lead Thin Shrink Small Outline Package [TSSOP]

(RU-28)

Dimensions shown in millimeters

ORDERING GUIDE

Model Temperature Range Package Description Package Option

ADD8710ARUZ1 −40°C to +85°C 28-Lead TSSOP RU-28
ADD8710ARUZ-REEL1 −40°C to +85°C 28-Lead TSSOP RU-28

1

Z = Pb-free part.

Rev. A | Page 10 of 12

ADD8710

NOTES

Rev. A | Page 11 of 12

ADD8710

NOTES

© 2005 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.

D04889–0–3/05(A)

Rev. A | Page 12 of 12