Analog Devices AD8614, AD8644 Datasheet

Single and Quad +18 V

1

2

3

5

4

2IN

+IN

V+

OUT A

AD8614

V2

14

13

12

11

10

9

8

1

2

3

4

5

6

7

–IN A
+IN A

V+
+IN B
–IN B

OUT B

OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C

OUT A

AD8644

a

FEATURES
Unity Gain Bandwidth: 5.5 MHz
Low Voltage Offset: 1.0 mV
Slew Rate: 7.5 V/␮s
Single-Supply Operation: 5 V to 18 V
High Output Current: 70 mA
Low Supply Current: 800 ␮A/Amplifier
Stable with Large Capacitive Loads
Rail-to-Rail Inputs and Outputs

APPLICATIONS
LCD Gamma and V
Modems
Portable Instrumentation
Direct Access Arrangement

GENERAL DESCRIPTION

The AD8614 (single) and AD8644 (quad) are single-supply,

5.5 MHz bandwidth, rail-to-rail amplifiers optimized for LCD
monitor applications.

They are processed using Analog Devices high voltage, high speed,
complementary bipolar process—HV XFCB. This proprietary
process includes trench isolated transistors that lower internal
parasitic capacitance which improves gain bandwidth, phase mar­gin and capacitive load drive. The low supply current of 800 µA
(typ) per amplifier is critical for portable or densely packed designs.
In addition, the rail-to-rail output swing provides greater dynamic
range and control than standard video amplifiers provide.

These products operate from supplies of 5 V to as high as
18 V. The unique combination of an output drive of 70 mA,
high slew rates, and high capacitive drive capability makes the
AD8614/AD8644 an ideal choice for LCD applications.

The AD8614 and AD8644 are specified over the temperature
range of –20°C to +85°C. They are available in 5-lead SOT-23,
14-lead TSSOP and 14-lead SOIC surface mount packages in
tape and reel.

COM

Drivers

Operational Amplifiers

AD8614/AD8644

PIN CONFIGURATIONS

5-Lead SOT-23

(RT Suffix)

14-Lead TSSOP

(RU Suffix)

OUT A

2IN A
1IN A

1IN B
2IN B

OUT B

114

V1

78

AD8644

14-Lead Narrow Body SO

(R Suffix)

OUT D

2IN D
1IN D
V2
1IN C
2IN C

OUT C

REV. 0

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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 1999

AD8614/AD8644–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

(5 V ≤ VS ≤ 18 V, V

= VS/2, TA = 25ⴗC unless otherwise noted)

CM

Parameter Symbol Conditions Min Typ Max Unit

INPUT CHARACTERISTICS␣

Offset Voltage V

Input Bias Current I

Input Offset Current I

B

OS

OS

–20°C ≤ T
–20°C ≤ T
–20°C ≤ T

≤ +85°C3mV

A

≤ +85°C 500 nA

A

≤ +85°C 200 nA

A

Input Voltage Range 0V
Common-Mode Rejection Ratio CMRR V
Voltage Gain A

VO

= 0 V to V

CM

V

= 0.5 V to VS –0.5 V, R

OUT

S

= 10 kΩ 10 150 V/mV

L

60 75 dB

1.0 2.5 mV

80 400 nA

5 100 nA

S

V

OUTPUT CHARACTERISTICS␣

I

Output Voltage High V
Output Voltage Low V
Output Short Circuit Current I

OH
OL

SC

= 10 mA VS –0.15 V

LOAD

I

= 10 mA 65 150 mV

LOAD

35 70 mA

–20°C ≤ TA ≤ +85°C30 mA

POWER SUPPLY␣

PSRR PSRR V

= ±2.25 V to ±9.25 V 80 110 dB

S

Supply Current / Amplifier Isy 0.8 1.1 mA

–20°C ≤ TA ≤ +85°C 1.5 mA

DYNAMIC PERFORMANCE␣

Slew Rate SR C

= 200 pF 7.5 V/µs

L

Gain Bandwidth Product GBP 5.5 MHz
Phase Margin Φo 65 Degrees
Settling Time t

S

0.01%, 10 V Step 3 µs

NOISE PERFORMANCE

Voltage Noise Density e

Current Noise Density i

NOTE
All typical values are for V
Specifications subject to change without notice.

= 18 V.

S

ABSOLUTE MAXIMUM RATINGS

n

e

n

n

1

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 V

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to V

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Operating Temperature Range . . . . . . . . . . . –20°C to +85°C

Junction Temperature Range . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Range (Soldering, 60 sec) . . . . . . . . 300°C

NOTES

1

Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute maximum rating condi­tions for extended periods may affect device reliability.

f = 1 kHz 12 nV/√Hz
f = 10 kHz 11 nV/√Hz
f = 10 kHz 1 pA/√Hz

Package Type ␪

5-Lead SOT-23 (RT) 230 140 °C/W

S

14-Lead TSSOP (RU) 180 35 °C/W

1

JA

␪

JC

Unit

14-Lead SOIC (R) 120 56 °C/W

NOTE

1

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

onto a circuit board for surface mount packages.

is specified for device soldered

JA

ORDERING GUIDE

Temperature Package Package

Model Range Description Option

AD8614ART
AD8644ARU
AD8644AR

NOTES

1

Available in 3,000 or 10,000 piece reels.

2

Available in 2,500 piece reels only.

1

–20°C to +85°C 5-Lead SOT-23 RT-5

2

–20°C to +85°C 14-Lead TSSOP RU-14

2

–20°C to +85°C 14-Lead SOIC R-14

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.

WARNING!

Although the AD8614/AD8644 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.

ESD SENSITIVE DEVICE

–2– REV. 0

Typical Performance Characteristics –

GAIN – dB

FREQUENCY – Hz

1k

100M

10k 100k 1M 10M

80
60
40
20

0

45
90
135
180

5V # VS # 18V
R

L

= 1MV
CL = 40pF
T

A

= 258C

PHASE SHIFT – Degrees

TIME – 500ns/Div

VS = 5V # VS # 18V
R

L

= 2kV
CL = 200pF
AV = 1
T

A

= 258C

V

S

2

VOLTAGE – 50mV/Div

COMMON-MODE VOLTAGE – Volts

400

0

2400

22.5

2.5

21.5 20.5

0.5 1.5

300

200

2200

2300

100

2100

VS = 62.5V

INPUT BIAS CURRENT – nA

AD8614/AD8644

50

VS = 18V
R

= 2kV

45

L

T

= 258C

A

40
35

30
25
20
15
10

SMALL SIGNAL OVERSHOOT – %

5
0

10 10k100 1k

+OS

2OS

CAPACITANCE – pF

Figure 1. Small Signal Overshoot vs.
Load Capacitance

7.5
VS = 5V

6.5

R

= 2kV

L

CL = 200pF

5.5
AV = 1

= 258C

T

4.5

A

3.5

2.5

1.5

VOLTAGE – 1V/Div

0.5

20.5

21.5

22.5

TIME – 1ms/Div

Figure 4. Large Signal Transient
Response

12

8

0.1%

4

0

24

28

OUTPUT SWING FROM 0 TO 6 V

212

0

0.1%

1.0 1.5 2.0 2.5 3.0

0.5 3.5
SETTLING TIME – ms

0.01%

0.01%

Figure 2. Settling Time

29

VS = 18V

25

R

= 2kV

L

CL = 200pF

21

AV = 1

17

= 258C

T

A

13

9
5

VOLTAGE – 4V/Div

1

23
27

211

TIME – 1ms/Div

Figure 5. Large Signal Transient
Response

Figure 3. Open-Loop Gain and Phase
vs. Frequency

Figure 6. Small Signal Transient
Response

10k

1k

100

10

DOUTPUT VOLTAGE – mV

1

0.001 100

Figure 7. Output Voltage to Supply
Rail vs. Load Current

5V # VS # 18V
T

= 258C

A

0.01
LOAD CURRENT – mA

SINK

SOURCE

0.1 1 10

1,000

900

TA = 258C

800
700
600
500
400

300
200

SUPPLY CURRENT/AMPLIFIER – mA

100

0

010123456789

SUPPLY VOLTAGE – 6Volts

Figure 8. Supply Current vs. Supply
Voltage

–3–REV. 0

Figure 9. Input Bias Current vs.
Common-Mode Voltage