AD8079 Analog Devices, AD8079 Datasheet

no-image

AD8079

Manufacturer Part Number
AD8079
Description
Dual 260 MHz Gain = +2.0 & +2.2 Buffer
Manufacturer
Analog Devices
Datasheet

Specifications of AD8079

-3db Bandwidth
260MHz
Slew Rate
800V/µs
Vos
5mV
Ib
3µA
# Opamps Per Pkg
2
Input Noise (nv/rthz)
2nV/rtHz
Vcc-vee
6V to 12V
Isy Per Amplifier
5.75mA
Packages
SOIC

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD8079AR
Manufacturer:
ADI
Quantity:
364
Part Number:
AD8079AR
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
AD8079ARZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
a
PRODUCT DESCRIPTION
The AD8079 is a dual, low power, high speed buffer designed
to operate on 5 V supplies. The AD8079’s pinout offers excel-
lent input and output isolation compared to the traditional dual
amplifier pin configuration. With two ac ground pins separating
both the inputs and outputs, the AD8079 achieves very low
crosstalk of less than –70 dB at 5 MHz.
Additionally, the AD8079 contains gain setting resistors factory
set at G = +2.0 (A grade) or Gain = +2.2 (B grade) allowing
circuit configurations with minimal external components. The
B grade gain of +2.2 compensates for gain loss through a system
by providing a single-point trim. Using active laser trimming of
these resistors, the AD8079 guarantees tight control of gain and
channel-channel gain matching. With its performance and con-
figuration, the AD8079 is well suited for driving differential
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
Factory Set Gain
Optimum Dual Pinout
Excellent Video Specifications (R
Low Power of 50 mW/Amplifier (5 mA)
High Speed and Fast Settling
Low Distortion of –65 dBc THD, f
High Output Drive of Over 70 mA
High ESD Tolerance (5 kV)
Available in Small 8-Pin SOIC
APPLICATIONS
Differential A-to-D Driver
Video Line Driver
Differential Line Driver
Professional Cameras
Video Switchers
Special Effects
RF Receivers
AD8079A: Gain = +2.0 (Also +1.0 & –1.0)
AD8079B: Gain = +2.2 (Also +1 & –1.2)
Gain of 2.2 Compensates for System Gain Loss
Minimizes External Components
Tight Control of Gain and Gain Matching (0.1%)
Simplifies PCB Layout
Low Crosstalk of –70 dB @ 5 MHz
Gain Flatness 0.1 dB to 50 MHz
0.01% Differential Gain Error
0.02 Differential Phase Error
260 MHz, –3 dB Bandwidth
750 V/ s Slew Rate (2 V Step), 800 V/ s (4 V Step)
40 ns Settling Time to 0.1% (2 V Step)
Drives Up to 8 Back-Terminated 75
Side) While Maintaining Good Differential Gain/
Phase Performance (0.01%/0.17 )
C
L
= 5 MHz
= 150
Loads (4 Loads/
)
cables and transformers. Its low distortion and fast settling are
ideal for buffering high speed dual or differential A-to-D con-
verters.
The AD8079 features a unique transimpedance linearization
circuitry. This allows it to drive video loads with excellent differ-
ential gain and phase performance of 0.01% and 0.02 on only
50 mW of power per amplifier. It features gain flatness of 0.1 dB
to 50 MHz. This makes the AD8079 ideal for professional video
electronics such as cameras and video switchers.
The AD8079 offers low power of 5 mA/amplifier (V
and can run on a single +12 V power supply while delivering
over 70 mA of load current. All of this is offered in a small 8-pin
SOIC package. These features make this amplifier ideal for por-
table and battery powered applications where size and power are
critical.
The outstanding bandwidth of 260 MHz along with 800 V/ s of
slew rate make the AD8079 useful in many general purpose high
speed applications where dual power supplies of 3 V to 6 V
are required.
The AD8079 is available in the industrial temperature range of
–40 C to +85 C.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
–0.1
–0.2
–0.3
–0.4
–0.5
0.1
Figure 1. Frequency Response and Flatness
0
1M
Gain = +2.0 & +2.2 Buffer
R
V
FUNCTIONAL BLOCK DIAGRAM
IN
L
= 100
= 50mV rms
50
GND
GND
+IN1
+IN2
World Wide Web Site: http://www.analog.com
8-Pin Plastic SOIC
1
2
3
4
10M
50
FREQUENCY – Hz
AD8079
SIDE 1
Dual 260 MHz
SIDE 1
100M
© Analog Devices, Inc., 1996
8
7
6
5
SIDE 2
OUT1
+V
–V
OUT2
S
S
SIDE 2
AD8079
S
= 5 V)
1G
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9

Related parts for AD8079

AD8079 Summary of contents

Page 1

... The outstanding bandwidth of 260 MHz along with 800 slew rate make the AD8079 useful in many general purpose high speed applications where dual power supplies are required. ...

Page 2

... MIN MAX + –V = – –V = – – –T MIN MAX –2– , unless otherwise noted) AD8079A/AD8079B Typ Max Units 260 MHz 50 MHz 100 MHz 750 V/ s 800 2.5 ns –65 dBc – ...

Page 3

... 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 the AD8079 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 ...

Page 4

... AD8079 10µF +5V 0.1µ AD8079 8 0.1µ PULSE 50 GENERATOR 10µF – 250ps R F Figure 3. Test Circuit SIDE 1 SIDE 2 20mV Figure 4. 100 mV Step Response SIDE 1 SIDE 2 200mV Figure Step Response 0.1 0 –0 100 L –0.2 –0.3 –0.4 –0.5 1M Figure 6. Frequency Response and Flatness – ...

Page 5

... BACK TERMINATED LOAD (150 ) –1 –2 1 BACK TERMINATED –3 LOAD (150 ) –4 – Figure 13. Short-Term Settling Time 5ns –5– AD8079 1.0V rms 100 0.5V rms 0.25V rms 125mV rms 62.5mV rms IN 10M ...

Page 6

... AD8079 3.4 3 150 L 3.2 3.1 +V OUT |–V | 3.0 OUT 2.9 2.8 2.7 2.6 2.5 –55 –35 – JUNCTION TEMPERATURE – C Figure 15. Output Swing vs. Temperature + –1 –55 –35 – JUNCTION TEMPERATURE – C Figure 16. Input Bias Current vs. Temperature –2 –4 –6 –55 –35 – ...

Page 7

... Up to four back-terminated 75 video loads can be driven by each amplifier, with a typical dif- ferential gain and phase performance of 0.01%/0.17 , respec- tively. The AD8079B, with a gain of +2.2, can be employed as a single gain-trimming element in a video signal chain. Finally, the AD8079A/B used in conjunction with our AD8116 cross- ...

Page 8

... The AD8079 also drives four back terminated loads (two each), as shown in Figure 26, with equally impressive performance (0.01%, 0.07 ). Another important consideration is isolation between loads in a multiple load application. The AD8079 has more than isolation at 5 MHz when driv- ing two 75 back terminated loads. SERIES ...

Page 9

... Figure 28. Differential Driver Frequency Response Layout Considerations The specified high speed performance of the AD8079 requires careful attention to board layout and component selection. Proper RF design techniques and low parasitic component se- lection are mandatory. The PCB should have a ground plane covering all unused por- tions of the component side of the board to provide a low im- pedance ground path ...

Page 10

... S Supply Bypassing + – SEE TABLE I Noninverting Configuration (G = +2) TRIM 200 AD8079B Optional Gain Trim ( TIE INPUT PINS +V S TOGETHER TO MINIMIZE PEAKING –V S Noninverting Configuration (G = +1) Figure 29. Inverting and Noninverting Configurations Table I. Recommended Component Values Component – ...

Page 11

... REV. A OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Lead SOIC (SO-8) 0.1968 (5.00) 0.1890 (4.80 0.1574 (4.00) 0.2440 (6.20 0.1497 (3.80) 0.2284 (5.80) PIN 1 0.0688 (1.75) 0.0098 (0.25) 0.0532 (1.35) 0.0040 (0.10) 8 0.0192 (0.49) 0.0500 0 0.0098 (0.25) SEATING (1.27) 0.0138 (0.35) PLANE 0.0075 (0.19) BSC –11– AD8079 0.0196 (0.50 0.0099 (0.25) 0.0500 (1.27) 0.0160 (0.41) 9 ...

Page 12

–12– ...

Related keywords