ADA4891-3ARU-EBZ AD [Analog Devices], ADA4891-3ARU-EBZ Datasheet

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ADA4891-3ARU-EBZ

Manufacturer Part Number
ADA4891-3ARU-EBZ
Description
Low Cost CMOS, High Speed, Rail-to-Rail Amplifiers
Manufacturer
AD [Analog Devices]
Datasheet
FEATURES
High speed and fast settling
Video specifications (G = +2, R
Single-supply operation
Low distortion: 79 dBc SFDR at 1 MHz
Linear output current: 125 mA at −40 dBc
Low power: 4.4 mA per amplifier
APPLICATIONS
Imaging
Consumer video
Active filters
Coaxial cable drivers
Clock buffers
Photodiode preamp
Contact image sensor and buffers
GENERAL DESCRIPTION
The ADA4891-1 (single), ADA4891-2 (dual), ADA4891-3 (triple),
and ADA4891-4 (quad) are CMOS, high speed amplifiers that
offer high performance at a low cost. The amplifiers feature true
single-supply capability, with an input voltage range that extends
300 mV below the negative rail.
In spite of their low cost, the ADA4891 family provides high
performance and versatility. The rail-to-rail output stage enables
the output to swing to within 50 mV of each rail, enabling maxi-
mum dynamic range.
The ADA4891 family of amplifiers is ideal for imaging applica-
tions, such as consumer video, CCD buffers, and contact image
sensor and buffers. Low distortion and fast settling time also
make them ideal for active filter applications.
The ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 are avail-
able in a wide variety of packages. The ADA4891-1 is available
in 8-lead SOIC and 5-lead SOT-23 packages. The ADA4891-2
is available in 8-lead SOIC and 8-lead MSOP packages. The
ADA4891-3 and ADA4891-4 are available in 14-lead SOIC and
14-lead TSSOP packages. The amplifiers are specified to operate
over the extended temperature range of −40°C to +125°C.
Rev. B
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.
−3 dB bandwidth: 220 MHz (G = +1)
Slew rate: 170 V/μs
Settling time to 0.1%: 28 ns
0.1 dB gain flatness: 25 MHz
Differential gain error: 0.05%
Differential phase error: 0.25°
Wide supply range: 2.7 V to 5.5 V
Output swings to within 50 mV of supply rails
L
= 150 Ω)
ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Low Cost CMOS, High Speed,
Figure 4. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14)
Figure 5. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14)
Figure 3. 8-Lead SOIC_N (R-8) and 8-Lead MSOP (RM-8)
CONNECTION DIAGRAMS
Rail-to-Rail Amplifiers
OUT1
+IN1
–IN1
OUT1
OUT2
OUT1
PD1
PD2
PD3
+V
–IN1
+IN1
+IN2
–IN2
–IN1
+IN1
–V
+V
–IN
+IN
NC
OUT
Figure 2. 5-Lead SOT-23 (RJ-5)
–V
Figure 1. 8-Lead SOIC_N (R-8)
–V
+IN
S
S
S
S
S
1
2
3
4
5
6
7
NC = NO CONNECT
1
2
3
4
1
2
3
4
5
6
7
©2010 Analog Devices, Inc. All rights reserved.
1
2
3
4
NC = NO CONNECT
1
2
3
ADA4891-1
ADA4891-4
ADA4891-2
ADA4891-3
ADA4891-1
8
7
6
5
14
13
12
11
10
8
7
6
5
9
8
5
4
14
13
12
11
10
9
8
NC
+V
OUT
NC
+V
OUT2
–IN2
+IN2
OUT4
–IN4
+IN4
–V
+IN3
–IN3
OUT3
+V
–IN
OUT2
–IN2
+IN2
–V
+IN3
–IN3
OUT3
S
S
S
S
S
www.analog.com

Related parts for ADA4891-3ARU-EBZ

ADA4891-3ARU-EBZ Summary of contents

Page 1

... The amplifiers feature true single-supply capability, with an input voltage range that extends 300 mV below the negative rail. In spite of their low cost, the ADA4891 family provides high performance and versatility. The rail-to-rail output stage enables the output to swing to within each rail, enabling maxi- mum dynamic range ...

Page 2

... Outline Dimensions ....................................................................... 21   Ordering Guide .......................................................................... 23 Changes to Figure 52 ...................................................................... 16 Added Figure 53 ............................................................................. 16 Changed Layout of Driving Capacitive Loads Section .............. 17 Added Disable Feature (ADA4891-3 Only) Section and Single-Supply Operation Section .......................................... 18 Added Multiplexer Section ........................................................... 19 Updated Outline Dimensions ....................................................... 21 Changes to Ordering Guide .......................................................... 23 6/10—Rev Rev. A Changes to Figure 26 ......................................................................... 9 Changes to Figure 33 and Figure 34 ...

Page 3

... SPECIFICATIONS 5 V OPERATION T = 25° kΩ to 2.5 V, unless otherwise noted. All specifications are for the ADA4891-1, ADA4891-2, ADA4891-3, and ADA4891-4, unless otherwise noted. For the ADA4891-1 and ADA4891-2, R unless otherwise noted. Table 1. Parameter DYNAMIC PERFORMANCE −3 dB Small-Signal Bandwidth Bandwidth for 0 ...

Page 4

... Positive PSRR Negative PSRR OPERATING TEMPERATURE RANGE 3 V OPERATION T = 25° kΩ to 1.5 V, unless otherwise noted. All specifications are for the ADA4891-1, ADA4891-2, ADA4891-3, and ADA4891-4, unless otherwise noted. For the ADA4891-1 and ADA4891-2, R unless otherwise noted. Table 2. ...

Page 5

... THD with 1 MHz p-p O ADA4891-3 only Part enabled Part powered down Part enabled, output rises to 90% of final value Part powered down, output falls to 10% of final value ADA4891-3 only + 3.15 V, − −V = −0. Rev ...

Page 6

... TSSOP 1.5 8-LEAD SOIC_N 1.0 8-LEAD MSOP 5-LEAD SOT-23 0.5 14-LEAD SOIC_N 0 –55 –35 – AMBIENT TEMPERATURE (°C) Figure 6. Maximum Power Dissipation vs. Ambient Temperature ) for each ADA4891-1/ JA θ JA 146 115 133 162 108 T = 150° 105 125 Unit °C/W °C/W ° ...

Page 7

... TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted, all plots are characterized for the ADA4891-1, ADA4891-2, ADA4891-3, and ADA4891-4. For the ADA4891-1 and ADA4891-2, the typical R value is 604 Ω. For the ADA4891-3 and ADA4891-4, the typical –1 –2 –3 – +10 – ...

Page 8

... OUT –0 374Ω 150Ω 1.4V p-p L OUT –0.5 0 FREQUENCY (MHz) Figure 17. 0.1 dB Gain Flatness vs. Supply Voltage +2, ADA4891-3/ADA4891 –1 – – 453Ω F –4 –5 –6 – – 150Ω ...

Page 9

... OUT OUT p-p OUT 453Ω 150Ω 100 FREQUENCY (MHz) ADA4891-3/ADA4891 1kΩ p-p OUT THIRD HARMONIC SECOND HARMONIC SECOND HARMONIC +V = +1. 50Ω THIRD HARMONIC –V = – ...

Page 10

... MODULATING RAMP LEVEL (IRE) Figure 29. Differential Gain and Phase Errors 47pF 22pF 10pF 0pF 150Ω 200mV p-p OUT 0 100 FREQUENCY (MHz) Figure 30. Small-Signal Frequency Response vs. C ADA4891-3/ADA4891-4 1M 10M ...

Page 11

... p-p OUT 0.5 –0.5 5ns/DIV = Rev Page 0 FREQUENCY (MHz) (ADA4891-3 Only 1kΩ OUT 150Ω 150Ω 1kΩ ...

Page 12

... ADA4891-1/ADA4891-2/ADA4891-3/ADA4891 150Ω p-p OUT 0.10 0 –0.10 –0.20 –0. TIME (ns) Figure 37. Short-Term Settling Time to 0.1% 3 INPUT 2 OUTPUT 1 0 1V/DIV –1 Figure 38. Input Overdrive Recovery from Positive Rail 3 OUTPUT 2 1 INPUT 0 –1 –2 1V/DIV –3 Figure 39 ...

Page 13

... FREQUENCY (MHz) Figure 45. All-Hostile Crosstalk (Output-to-Output) vs. Frequency ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 0.1 10 100 Figure 46. Forward Isolation vs. Frequency (ADA4891-3 Only) 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 100 0 Figure 47. Output Saturation Voltage vs. Load Current and Temperature 6.0 5.5 5.0 4.5 4.0 3.5 3.0 1k – ...

Page 14

... ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 4.4 4.2 4.0 3.8 3.6 3.4 3.2 3.0 2.7 3.0 3.3 3.6 3.9 SUPPLY VOLTAGE (V) Figure 49. Supply Current per Amplifier vs. Supply Voltage 4.2 4.5 4.8 Rev Page ...

Page 15

... In a controlled impedance signal path, R termination resistor designed to match the input source imped- ance. Note that R is not required for normal operation generally set to match the input source impedance. Table 5. Recommended Component Values and Effect of Gain on ADA4891-1/ADA4891-2 Performance (R Feedback Network Values Gain R (Ω) R (Ω ...

Page 16

... ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 Table 6. Recommended Component Values and Effect of Gain on ADA4891-3/ADA4891-4 Performance (R Feedback Network Values Gain R (Ω) R (Ω −1 453 453 +1 0 Open +2 453 453 +5 453 90.6 +10 453 45.3 EFFECT 0.1 dB GAIN FLATNESS F Gain flatness is an important specification in video applications. ...

Page 17

... Figure 54. 0.1 dB Gain Flatness vs. C ADA4891-1/ADA4891-2 DRIVING CAPACITIVE LOADS A highly capacitive load reacts with the output impedance of the amplifiers, causing a loss of phase margin and subsequent peaking or even oscillation. The ADA4891-1/ADA4891-2 are used to demonstrate this effect (see Figure 55 and Figure 56 ...

Page 18

... TH <V TH SINGLE-SUPPLY OPERATION The ADA4891 can also be operated from a single power supply. Figure 61 shows the ADA4891-3 configured as a single 5 V supply video driver. • The input signal is ac-coupled into the amplifier via Capacitor C1. • Resistor R2 and Resistor R4 establish the input midsupply reference for the amplifier. • ...

Page 19

... Figure 63. Video Reconstruction Filter Frequency Performance ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 MULTIPLEXER The ADA4891-3 has a disable pin used to power down the amplifier to save power or to create a mux circuit. If two or more ADA4891-3 outputs are connected together and only one output is enabled, then only the signal of the enabled amplifier appears at the output ...

Page 20

... SOIC footprint can add as much as 0 capacitance to ground if the ground or power plane is not cleared under the ADA4891 pins. In fact, the ground and power planes should be kept at a distance of at least 0.05 mm from the input pins on all layers of the board. ...

Page 21

... OUTLINE DIMENSIONS 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 1.70 1.60 1.50 1.30 1.15 0.90 0.15 MAX 0.05 MIN ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2441) 4.00 (0.1574) 1 5.80 (0.2284) 3.80 (0.1497) 4 1.27 (0.0500) BSC 1.75 (0.0688) 1.35 (0.0532) 8° 0° 0.51 (0.0201) 0.10 0.31 (0.0122) 0.25 (0.0098) SEATING 0.17 (0.0067) PLANE COMPLIANT TO JEDEC STANDARDS MS-012-AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN ...

Page 22

... ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 IDENTIFIER 4.00 (0.1575) 3.80 (0.1496) 0.25 (0.0098) 0.10 (0.0039) COPLANARITY 0.10 4.50 4.40 4.30 PIN 1 1.05 1.00 0.80 0.15 0.05 COPLANARITY 0.10 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° MAX 0.85 1.10 MAX 0.75 0.15 0.23 6° 0.40 0.05 0.09 0° 0.25 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 70. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters 8.75 (0.3445) 8.55 (0.3366 6.20 (0.2441) 1 5.80 (0.2283 ...

Page 23

... ADA4891-4ARZ-R7 −40°C to +125°C ADA4891-4ARZ-RL −40°C to +125°C ADA4891-1AR-EBZ ADA4891-1ARJ-EBZ ADA4891-2AR-EBZ ADA4891-2ARM-EBZ ADA4891-3AR-EBZ ADA4891-3ARU-EBZ ADA4891-4AR-EBZ ADA4891-4ARU-EBZ RoHS Compliant Part. ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 Package Description 8-Lead SOIC_N 8-Lead SOIC_N, 13” Tape and Reel 8-Lead SOIC_N, 7” Tape and Reel 5-Lead SOT-23, 7” ...

Page 24

... ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08054-0-7/10(B) Rev Page ...

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