ADA4851-2 Analog Devices, ADA4851-2 Datasheet

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ADA4851-2

Manufacturer Part Number
ADA4851-2
Description
Low Cost, High Speed, Rail-to-Rail, Output Op Amp (Dual)
Manufacturer
Analog Devices
Datasheet

Specifications of ADA4851-2

-3db Bandwidth
130MHz
Slew Rate
375V/µs
Vos
600µV
Ib
2.2µA
# Opamps Per Pkg
2
Input Noise (nv/rthz)
10nV/rtHz
Vcc-vee
2.7V to 12V
Isy Per Amplifier
3.2mA
Packages
SOP

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FEATURES
Qualified for automotive applications
High speed
Excellent video specifications
Fully specified at +3 V, +5 V, and ±5 V supplies
Rail-to-rail output
Low voltage offset: 0.6 mV
Wide supply range: 2.7 V to 12 V
Low power: 2.5 mA per amplifier
Power-down mode
Available in space-saving packages
APPLICATIONS
Automotive infotainment systems
Automotive driver assistance systems
Consumer video
Professional video
Video switchers
Active filters
Clock buffers
GENERAL DESCRIPTION
The ADA4851-1 (single), ADA4851-2 (dual), and ADA4851-4
(quad) are low cost, high speed, voltage feedback rail-to-rail
output op amps. Despite their low price, these parts provide
excellent overall performance and versatility. The 130 MHz,
−3 dB bandwidth and high slew rate make these amplifiers well
suited for many general-purpose, high speed applications.
The ADA4851 family is designed to operate at supply voltages
as low as +3 V and up to ±5 V. These parts provide true single-
supply 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 amplifiers can swing within 60 mV of either
supply rail.
With their combination of low price, excellent differential gain
(0.08%), differential phase (0.09º), and 0.1 dB flatness out to
11 MHz, these amplifiers are ideal for consumer video applications.
The ADA4851-1W, ADA4851-2W, and ADA4851-4W are
automotive grade versions, qualified for automotive applications.
Rev. J
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.
130 MHz, −3 dB bandwidth
375 V/μs slew rate
55 ns settling time to 0.1%
0.1 dB flatness: 11 MHz
Differential gain: 0.08%
Differential phase: 0.09°
Output swings to within 60 mV of either rail
6-lead SOT-23, 8-lead MSOP, and 14-lead TSSOP
Low Cost, High Speed, Rail-to-Rail,
ADA4851-1/ADA4851-2/ADA4851-4
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
See the Automotive Products section for more details. The
ADA4851 family is designed to work over the extended
temperature range (−40°C to +125°C).
–1
–2
–3
–4
–5
–6
4
3
2
1
0
1
G = +1
V
R
C
S
L
L
= 5V
= 1kΩ
= 5pF
Figure 3. ADA4851-4, 14-Lead TSSOP (RU-14)
Figure 4. Small-Signal Frequency Response
Figure 1. ADA4851-1, 6-Lead SOT-23 (RJ-6)
Figure 2. ADA4851-2, 8-Lead MSOP (RM-8)
V
V
V
OUT
OUT
–IN 1
+IN 1
+IN 2
–IN 2
–V
OUT
+IN
+V
PIN CONFIGURATIONS
©2004–2010 Analog Devices, Inc. All rights reserved.
S
OUT1
TOP VIEW (Not to Scale)
1
S
2
–IN1
+IN1
–V
1
2
3
1
2
3
4
5
6
7
S
ADA4851-1
10
1
2
3
4
FREQUENCY (MHz)
(Not to Scale)
ADA4851-4
ADA4851-2
(Not to Scale)
TOP VIEW
TOP VIEW
Output Op Amps
6
5
4
+V
POWER DOWN
–IN
100
14
13
12
11
10
8
7
6
5
S
9
8
+V
OUT
–IN2
+IN2
V
–IN 4
+IN 4
–V
+IN 3
–IN 3
V
OUT
OUT
S
S
4
3
www.analog.com
1k

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ADA4851-2 Summary of contents

Page 1

... Video switchers Active filters Clock buffers GENERAL DESCRIPTION The ADA4851-1 (single), ADA4851-2 (dual), and ADA4851-4 (quad) are low cost, high speed, voltage feedback rail-to-rail output op amps. Despite their low price, these parts provide excellent overall performance and versatility. The 130 MHz, − ...

Page 2

... C to Rev. D Added Video Reconstruction Filter Section ............................... 15 5/05—Rev Rev. C Changes to General Description ..................................................... 1 Changes to Input Section .............................................................. 14 4/05—Rev Rev. B Added ADA4851-2, Added 8-Lead MSOP ..................... Universal Changes to Features .......................................................................... 1 Changes to General Description ..................................................... 1 Changes to Table 1 ............................................................................. 3 Changes to Table 2 ............................................................................. 4 Changes to Table 3 ............................................................................. 5 Changes to Table 4 and Figure 5 ...................................................... 6 Changes to Figure 12, Figure 15, and Figure 17 ...

Page 3

... 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 ADA4851-1/ADA4851-2/ADA4851-4 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 ...

Page 4

... Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Harmonic Distortion, HD2/HD3 Input Voltage Noise Input Current Noise Differential Gain Differential Phase Crosstalk (RTI)—ADA4851-2/ADA4851-4 DC PERFORMANCE Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Bias Current Drift Input Bias Offset Current Open-Loop Gain ...

Page 5

... Output Overdrive Recovery Time (Rise/Fall) Output Voltage Swing Short-Circuit Current POWER SUPPLY Operating Range Quiescent Current per Amplifier Quiescent Current (Power-Down) Positive Power Supply Rejection Negative Power Supply Rejection ADA4851-1/ADA4851-2/ADA4851-4 Conditions/Comments V = +0.7 V, −0 ADA4851-1W/2W/4W only MIN MAX ...

Page 6

... Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Harmonic Distortion, HD2/HD3 Input Voltage Noise Input Current Noise Differential Gain Differential Phase Crosstalk (RTI)—ADA4851-2/ADA4851-4 DC PERFORMANCE Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Bias Current Drift Input Bias Offset Current Open-Loop Gain ...

Page 7

... Output Voltage Swing Linear Output Current Short-Circuit Current POWER SUPPLY Operating Range Quiescent Current per Amplifier Quiescent Current (Power-Down) Positive Power Supply Rejection Negative Power Supply Rejection ADA4851-1/ADA4851-2/ADA4851-4 Conditions V = +1.1 V, −0 ADA4851-1W/2W/4W only MIN MAX 1% THD with 1 MHz, V ...

Page 8

... Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Harmonic Distortion, HD2/HD3 Input Voltage Noise Input Current Noise Differential Gain Differential Phase Crosstalk (RTI)—ADA4851-2/ADA4851-4 DC PERFORMANCE Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Bias Current Drift Input Bias Offset Current Open-Loop Gain ...

Page 9

... Output Voltage Swing Linear Output Current Short-Circuit Current POWER SUPPLY Operating Range Quiescent Current per Amplifier Quiescent Current (Power-Down) Positive Power Supply Rejection Negative Power Supply Rejection ADA4851-1/ADA4851-2/ADA4851-4 Conditions V = ±1 ADA4851-1W/2W/4W only MIN MAX 1% THD with 1 MHz, V ...

Page 10

... TSSOP 120 Maximum Power Dissipation The maximum safe power dissipation for the ADA4851-1/ ADA4851-2/ADA4851-4 is limited by the associated rise in junction temperature ( the die. At approximately 150°C, J which is the glass transition temperature, the plastic changes its properties. Even temporarily exceeding this temperature limit ...

Page 11

... Figure 10. Small-Signal Frequency Response for Various Temperatures V = +5V S –1 –2 –3 –4 –5 –6 –7 100 300 Rev Page ADA4851-1/ADA4851-2/ADA4851 1kΩ 0.1V p-p 2 OUT 1 0 5pF 0pF 1 10 FREQUENCY (MHz) ...

Page 12

... ADA4851-1/ADA4851-2/ADA4851-4 6.2 6.1 6.0 5 100mV p-p OUT 5 p-p OUT p-p 5.7 OUT 5.6 5.5 5.4 0.1 1 FREQUENCY (MHz) Figure 12. 0.1 dB Flatness Response for Various Output Amplitudes 1 0 –1 – 150Ω L –3 –4 –5 – FREQUENCY (MHz) Figure 13. Large Frequency Response for Various Loads 140 120 100 ...

Page 13

... TIME (ns) Figure 20. Input Overdrive Recovery ADA4851-1/ADA4851-2/ADA4851-4 0.075 0.050 0.025 0 = 150Ω HD3 L –0.025 –0.050 –0.075 10 0 Figure 21. Small-Signal Transient Response for Various Supplies 2 ...

Page 14

... ADA4851-1/ADA4851-2/ADA4851-4 1 150Ω L 1.0 = ± + 0.5 0 –0.5 –1.0 –1 100 TIME (ns) Figure 24. Large-Signal Transient Response for Various Supplies 0.5 +V – OUT 0 +3V S 0.3 0.2 0 LOAD CURRENT (mA) Figure 25. Output Saturation Voltage vs. Load Current 600 ±5V ...

Page 15

... Figure 31. Output Saturation vs. Temperature for Various Supplies 3 3.0 2.8 V 2.6 2 +3V S 2.2 2.0 –40 –25 – TEMPERATURE (°C) Figure 32. Supply Current vs. Temperature for Various Supplies ADA4851-1/ADA4851-2/ADA4851-4 1000 100 110 125 10 100 110 125 80 = ± ...

Page 16

... DRIVE AMPS 1, 2, AND 4 LISTEN AMP 3 DRIVE AMP 1 LISTEN AMP 2 0 FREQUENCY (MHz) Figure 38. ADA4851-4, RTI Crosstalk vs. Frequency 1kΩ p-p IN DRIVE AMP 1 LISTEN AMP 2 DRIVE AMP 2 LISTEN AMP 1 0 FREQUENCY (MHz) Figure 39. ADA4851-2, RTI Crosstalk vs. Frequency 100 100 ...

Page 17

... CIRCUIT DESCRIPTION The ADA4851-1/ADA4851-2/ADA4851-4 feature a high slew rate input stage that is a true single-supply topology, capable of sensing signals at or below the negative supply rail. The rail-to- rail output stage can pull within either supply rail when driving light loads and within 0.17 V when driving 150 Ω. High speed performance is maintained at supply voltages as low as 2 ...

Page 18

... OVERLOAD BEHAVIOR AND RECOVERY Input The specified input common-mode voltage of the ADA4851-1/ ADA4851-2/ADA4851-4 is 200 mV below the negative supply to within 2 the positive supply. Exceeding the top limit results in lower bandwidth and increased rise time, as shown in Figure 41 and Figure 42. Pushing the input voltage of a unity- gain follower to less than 2 V from the positive supply leads to the behavior shown in Figure 43— ...

Page 19

... V OUT 75Ω Gain V’ V OUT (V/V) (V) (V) 2 1.6 0.8 3 2.4 1.2 2 4.9 2.45 0.03 Figure 47. Video Reconstruction Filter Frequency Performance Rev Page ADA4851-1/ADA4851-2/ADA4851-4 C2 51pF +3V OUT 47Ω 125Ω R6 6.8Ω 37.4Ω 51pF R4 2kΩ 6.8pF 1kΩ Figure 46. 8 MHz Video Reconstruction Filter Schematic 5dB/REF – ...

Page 20

... ADA4851-1/ADA4851-2/ADA4851-4 OUTLINE DIMENSIONS 1.70 1.60 1.50 PIN 1 INDICATOR 1.30 1.15 0.90 0.15 MAX 0.05 MIN IDENTIFIER 3.00 2.90 2. 3.00 2.80 2. 0.95 BSC 1.90 BSC 0.20 MAX 1.45 MAX 0.08 MIN 0.95 MIN SEATING 0.50 MAX PLANE 0.30 MIN COMPLIANT TO JEDEC STANDARDS MO-178-AB Figure 48. 6-Lead Small Outline Transistor Package [SOT-23] (RJ-6) Dimensions shown in millimeters 3.20 3.00 2.80 5. 3.20 4.90 3.00 4.65 1 2.80 4 PIN 1 0.65 BSC 0.95 15° ...

Page 21

... W = qualified for automotive applications. AUTOMOTIVE PRODUCTS The ADA4851-1W/ADA4851-2W/ADA4851-4W models are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. Note that these automotive models may have specifications that differ from the commercial models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for use in automotive applications ...

Page 22

... ADA4851-1/ADA4851-2/ADA4851-4 NOTES Rev Page ...

Page 23

... NOTES ADA4851-1/ADA4851-2/ADA4851-4 Rev Page ...

Page 24

... ADA4851-1/ADA4851-2/ADA4851-4 NOTES ©2004–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05143-0-10/10(J) Rev Page ...

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