Analog Devices ADA4851 1 4 a Datasheet

Low Cost, High Speed,

FEATURES

High speed

130 MHz, −3 dB bandwidth
375 V/µs slew rate
85 ns settling time to 0.1%

Excellent video specifications

0.1 dB flatness: 14 MHz
Differential gain: 0.04%

Differential phase: 0.06°
Fully specified at +3 V, +5 V, and ±5 V supplies
Rail-to-rail output

Output swings to within 70 mV of either rail
Low voltage offset: 0.6 mV
Wide supply range: 3 V to 10 V
Low power: 2.5 mA
Power-down mode
Available in space-saving packages: SOT-23-6 and TSSOP-14

APPLICATIONS

Consumer video
Professional video
Video switchers
Active filters

Rail-to-Rail Output Op Amps

ADA4851-1/ADA4851-4

PIN CONFIGURATIONS

ADA4851-1

1

V

OUT

2

–V

S

3

+IN

TOP VIEW (Not to Scale)

Figure 1. ADA4851-1, 6-Lead SOT-23 (RJ-6)

V

1

1

OUT

–IN 1

2

+IN 1

3

ADA4851-4

4

+V

S

5

+IN 2

6

–IN 2

V

2

7

OUT

Figure 2. ADA4851-4, 14-Lead TSSOP (RU-14)

6

5

4

+V

S

POWER DOWN

–IN

14

V

4

OUT

–IN 4

13

+IN 4

12

11

–V

S

10

+IN 3

9

–IN 3

8

3

V

OUT

05143-001

05143-054

GENERAL DESCRIPTION

The ADA4851-1 (single)/ADA4851-4 (quad) are low cost, high
speed, voltage feedback rail-to-rail output op amps. Despite
their low price, the ADA4851-1/ADA4851-4 provide excellent
overall performance and versatility. The 130 MHz, −3 dB
bandwidth and 375 V/µs slew rate make these amplifiers well­suited for many general-purpose, high speed applications.

The ADA4851-1/ADA4851-4 are designed to operate at supply
voltages as low as 3 V and up to ±5 V, using only 2.5 mA of supply
current. To further reduce power consumption, the amplifier is
equipped with a power-down mode, which lowers the supply
current to 0.2 mA.

The ADA4851-1/ADA4851-4 provide users with a true single­supply capability, allowing input signals to extend 200 mV below
the negative rail and to within 2.2 V of the positive rail. On the
output, the amplifier can swing within 70 mV of either supply rail.

With their combination of low price, excellent differential gain
(0.04%), differential phase (0.06º), and 0.1 dB flatness out to
12 MHz, these amplifiers are ideal for consumer video applications.

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 Anal og Devices. Trademarks and
registered trademarks are the property of their respective owners.

The ADA4851-1 is available in a 6-lead SOT-23 package, and
the ADA4851-4 is available in a 14-lead TSSOP package. Both
are designed to work in the extended temperature range (−40°C
to +125°C).

4

G = +1

= 5V

V

3

S

= 1kΩ

R

L

= 5pF

C

2

L

1

0

–1

–2

–3

CLOSED-LOOP GAIN (dB)

–4

–5

–6

1 10010 1k

FREQUENCY (MHz)

Figure 3. Small Signal Frequency Respon se

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
Fax: [phone] © 2005 Analog Devices, Inc. All rights reserved.

www.analog.com

05143-004

ADA4851-1/ADA4851-4

TABLE OF CONTENTS

Specifications..................................................................................... 3

Typical Performanc e C haracteri s t i c s ..............................................7

Specifications with +3 V Supply................................................. 3

Specifications with +5 V Supply................................................. 4

Specifications with ±5 V Supply................................................. 5

Absolute Maximum Ratings............................................................ 6

Thermal Resistance ...................................................................... 6

ESD Caution.................................................................................. 6

REVISION HISTORY

1/05—Rev. 0 to Rev. A

Added ADA4851-4.............................................................Universal

Added 14-Lead TSSOP ......................................................Universal

Changes to Features.......................................................................... 1

Changes to General Description .................................................... 1

Changes to Figure 3.......................................................................... 1

Changes to Specifications................................................................ 3

Changes to Figure 4.......................................................................... 6

Changes to Figure 8.......................................................................... 7

Changes to Figure 11........................................................................ 8

Changes to Figure 22........................................................................ 9

Changes to Figure 23, Figure 24, and Figure 25.......................... 10

Changes to Figure 27 and Figure 28............................................. 10

Changes to Figure 29, Figure 30, and Figure 31.......................... 11

Changes to Figure 34...................................................................... 11

Added Figure 37.............................................................................. 12

Changes to Ordering Guide.......................................................... 15

Updated Outline Dimensions....................................................... 15

Circuit Description......................................................................... 13

Headroom Considerations........................................................ 13

Overload Behavior and Recovery ............................................ 14

Outline Dimensions....................................................................... 15

Ordering Guide .......................................................................... 15

10/04—Revision 0: Initial Version

Rev. A | Page 2 of 16

ADA4851-1/ADA4851-4

SPECIFICATIONS

SPECIFICATIONS WITH +3 V SUPPLY

TA = 25°C, RF = 0 Ω for G = +1, RF = 1 kΩ for G > +1, RL = 1 kΩ, unless otherwise noted.

Table 1.

Parameter Conditions Min Typ Max Unit

DYNAMIC PERFORMANCE

−3 dB Bandwidth G = +1, VO = 0.1 V p-p 104 130 MHz

G = +1, VO = 0.5 V p-p 80 105 MHz

G = +2, VO = 1.0 V p-p, RL = 150 Ω 40 MHz
Bandwidth for 0.1 dB Flatness G = +2, VO = 0.5 V p-p, RL = 150 Ω 18 MHz
Slew Rate G = +2, VO = 1 V step 100 V/µs

NOISE/DISTORTION PERFORMANCE

Harmonic Distortion (dBc) HD2/HD3 fC = 1 MHz, VO = 0.2 V p-p, G = +2 −85/−113 dBc
Input Voltage Noise f = 100 kHz 10

Input Current Noise f = 100 kHz 2.5
Crosstalk f = 5 MHz, G = +2, VO = 1.0 V p-p −60 dB

DC PERFORMANCE

Input Offset Voltage 0.6 3.3 mV
Input Offset Voltage Drift 4 µV/°C
Input Bias Current
Input Bias Current Drift 6 nA/°C
Input Bias Offset Current 20 nA
Open-Loop Gain VO = 0.25 V to 0.75 V 80 102 dB

INPUT CHARACTERISTICS

Input Resistance Differential/common-mode 0.5/5.0 MΩ
Input Capacitance 1.2 pF
Input Common-Mode Voltage Range −0.2 to +0.8 V
Input Overdrive Recovery Time (Rise/Fall) VIN = +3.5 V, −0.5 V, G = +1 60/60 ns
Common-Mode Rejection Ratio VCM = 0 V to 0.5 V −81 −106 dB

POWER-DOWN

Power-Down Input Voltage Power-down <1.1 V

Enabled >1.6 V

Turn-Off Time 0.7 µs
Turn-On Time 60 ns
Power-Down Bias Current

Enabled Power-down = 3 V +4 +6 µA
Power-Down Power-down = 0 V −14 −20 µA

OUTPUT CHARACTERISTICS

Output Overdrive Recovery Time (Rise/Fall) VIN = +0.7 V, −0.1 V, G = +5 70/100 ns
Output Voltage Swing 0.05 to 2.91 0.03 to 2.94 V
Short-Circuit Current Sinking/sourcing 90/70 mA

POWER SUPPLY

Operating Range 2.7 12 V
Quiescent Current per Amplifier 2.4 2.7 mA
Quiescent Current (Power-Down) Power-down = low 0.2 0.3 mA
Positive Power Supply Rejection +VS = +2.5 V to +3.5 V, −VS = −0.5 V −81 −102 dB
Negative Power Supply Rejection +VS = +2.5 V, −VS = −0.5 V to –1.5 V −80 −102 dB

2.3 4.0 µA

nV/√Hz
pA/√Hz

Rev. A | Page 3 of 16

ADA4851-1/ADA4851-4

SPECIFICATIONS WITH +5 V SUPPLY

TA = 25°C, RF = 0 Ω for G = +1, RF = 1 kΩ for G > +1, RL = 1 kΩ, unless otherwise noted.

Table 2.

Parameter Conditions Min Typ Max Unit

DYNAMIC PERFORMANCE

−3 dB Bandwidth G = +1, VO = 0.1 V p-p 96 125 MHz

G = +1, VO = 0.5 V p-p 72 96 MHz

G = +2, VO = 1.4 V p-p, RL = 150 Ω 35 MHz
Bandwidth for 0.1 dB Flatness G = +2, VO = 1.4 V p-p, RL = 150 Ω 12 MHz
Slew Rate G = +2, VO = 3 V step 200 V/µs
Settling Time to 0.1% G = +2, VO = 1 V step, RL = 150 Ω 85 ns

NOISE/DISTORTION PERFORMANCE

Harmonic Distortion (dBc) HD2/HD3 fC = 1 MHz, VO = 0.2 V p-p, G = +2 −98/−113 dBc
Input Voltage Noise f = 100 kHz 10

Input Current Noise f = 100 kHz 2.5
Differential Gain G = +2, NTSC, RL = 150 Ω 0.05 %
Differential Phase G = +2, NTSC, RL = 150 Ω 0.09 Degrees
Crosstalk f = 5 MHz, G = +2, VO = 2.0 V p-p −60 dB

DC PERFORMANCE

Input Offset Voltage 0.6 3.4 mV
Input Offset Voltage Drift 4 µV/°C
Input Bias Current
Input Bias Current Drift 6 nA/°C
Input Bias Offset Current 20 nA
Open-Loop Gain VO = 1 V to 4 V 97 107 dB

INPUT CHARACTERISTICS

Input Resistance Differential/common-mode 0.5/5.0 MΩ
Input Capacitance 1.2 pF
Input Common-Mode Voltage Range −0.2 to +2.8 V
Input Overdrive Recovery Time (Rise/Fall) VIN = +5.5 V, −0.5 V, G = +1 50/45 ns
Common-Mode Rejection Ratio VCM = 0 V to 2 V −88 −105 dB

POWER-DOWN

Power-Down Input Voltage Power-down <1.1 V
Enabled >1.6 V
Turn-Off Time 0.7 µs
Turn-On Time 50 ns
Power-Down Bias Current

Enabled Power-down = 5 V 33 40 µA
Power-Down Power-down = 0 V −22 −30 µA

OUTPUT CHARACTERISTICS

Output Overdrive Recovery Time (Rise/Fall) VIN = +1.1 V, −0.1 V, G = +5 60/70 ns
Output Voltage Swing 0.09 to 4.91 0.06 to 4.94 V
Short-Circuit Current Sinking/sourcing 110/90 mA

POWER SUPPLY

Operating Range 2.7 12 V
Quiescent Current per Amplifier 2.5 2.8 mA
Quiescent Current (Power-Down) Power-down = low 0.2 0.3 mA
Positive Power Supply Rejection +VS = +5 V to +6 V, −VS = 0 V −82 −101 dB
Negative Power Supply Rejection +VS = +5 V, −VS = −0 V to −1 V −81 −101 dB

2.2 3.9 µA

nV/√Hz
pA/√Hz

Rev. A | Page 4 of 16

ADA4851-1/ADA4851-4

SPECIFICATIONS WITH ±5 V SUPPLY

TA = 25°C, RF = 0 Ω for G = +1, RF = 1 kΩ for G > +1, RL = 1 kΩ, unless otherwise noted.

Table 3.

Parameter Conditions Min Typ Max Unit

DYNAMIC PERFORMANCE

−3 dB Bandwidth G = +1, VO = 0.1 V p-p 83 105 MHz

G = +1, VO = 1 V p-p 52 74 MHz

G = +2, VO = 2 V p-p, RL = 150 Ω 40 MHz
Bandwidth for 0.1 dB Flatness G = +2, VO = 2 V p-p, RL = 150 Ω 10 MHz
Slew Rate G = +2, VO = 7 V p-p step 375 V/µs
G = +2, VO = 2 V p-p step 190 V/µs
Settling Time to 0.1% G = +2, VO = 2 V step, RL = 150 Ω 90 ns

NOISE/DISTORTION PERFORMANCE

Harmonic Distortion (dBc) HD2/HD3 fC = 1 MHz, VO = 1 V p-p, G = +1 −90/−117 dBc
Input Voltage Noise f = 100 kHz 10

Input Current Noise f = 100 kHz 2.5
Differential Gain G = +2, NTSC, RL = 150 Ω 0.04 %
Differential Phase G = +2, NTSC, RL = 150 Ω 0.06 Degrees
Crosstalk f = 5 MHz, G = +2, VO = 2.0 V p-p −60 dB

DC PERFORMANCE

Input Offset Voltage 0.6 3.5 mV
Input Offset Voltage Drift 4 µV/°C
Input Bias Current
Input Bias Current Drift 6 nA/°C
Input Bias Offset Current 20 nA
Open-Loop Gain

INPUT CHARACTERISTICS

Input Resistance Differential/common-mode 0.5/5.0 MΩ
Input Capacitance 1.2 pF
Input Common-Mode Voltage Range −5.2 to +2.8 V
Input Overdrive Recovery Time (Rise/Fall) VIN = ±6 V, G = +1 50/25 ns
Common-Mode Rejection Ratio VCM = 0 V to 4 V −90 −105 dB

POWER-DOWN

Power-Down Input Voltage Power-down < −3.9 V
Enabled > −3.4 V
Turn-Off Time 0.7 µs
Turn-On Time 30 ns
Power-Down Bias Current

Enabled Power-down = +5 V 0.1 0.13 mA
Power-Down Power-down = −5 V −0.05 −0.06 mA

OUTPUT CHARACTERISTICS

Output Overdrive Recovery Time (Rise/Fall) VIN = ±1.2 V, G = +5 80/50 ns
Output Voltage Swing −4.88 to +4.88 −4.92 to +4.92 V
Short-Circuit Current Sinking/sourcing 125/110 mA

POWER SUPPLY

Operating Range 2.7 12 V
Quiescent Current per Amplifier 2.9 3.2 mA
Quiescent Current (Power-Down) Power-down = low 0.2 0.3 mA
Positive Power Supply Rejection +VS = +5 V to +6 V, −VS = −5 V −82 −102 dB
Negative Power Supply Rejection +VS = +5 V, −VS = −5 V to −6 V −81 −102 dB

2.2 4.0 µA

= ±2.5 V

V

O

99 106 dB

nV/√Hz
pA/√Hz

Rev. A | Page 5 of 16