AD8002 Analog Devices, AD8002 Datasheet

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AD8002

Manufacturer Part Number
AD8002
Description
Dual 600 MHz, 50 mW Current Feedback Amplifier
Manufacturer
Analog Devices
Datasheet

Specifications of AD8002

Vcc-vee
6V to 12V
Isy Per Amplifier
11.5mA
Packages
DIP,SOIC,SOP
-3db Bandwidth
600MHz
Slew Rate
1.2kV/µs
Vos
2mV
Ib
3µA
# Opamps Per Pkg
2
Input Noise (nv/rthz)
2nV/rtHz

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a
PRODUCT DESCRIPTION
The AD8002 is a dual, low-power, high-speed amplifier designed
to operate on ±5 V supplies. The AD8002 features unique trans-
impedance linearization circuitry. This allows it to drive video
loads with excellent differential gain and phase performance on
only 50 mW of power per amplifier. The AD8002 is a current
feedback amplifier and features gain flatness of 0.1 dB to 60 MHz
while offering differential gain and phase error of 0.01% and
0.02°. This makes the AD8002 ideal for professional video
electronics such as cameras and video switchers. Additionally,
the AD8002’s low distortion and fast settling make it ideal for
buffer high-speed A-to-D converters.
The AD8002 offers low power of 5.5 mA/amplifier max (V
± 5 V) and can run on a single 12 V power supply, while capable
of delivering over 70 mA of load current. It is offered in an
8-lead plastic DIP, SOIC, and µSOIC package. These features
make this amplifier ideal for portable and battery-powered
applications where size and power are critical.
S
=
The outstanding bandwidth of 600 MHz along with 1200 V/µs
of slew rate make the AD8002 useful in many general purpose
high speed applications where dual power supplies of up to ± 6 V
and single supplies from 6 V to 12 V are needed. The AD8002 is
available in the industrial temperature range of –40°C to +85°C.
–0.1
–0.2
–0.3
–0.4
–0.5
0.1
0
Current Feedback Amplifier
1M
8-Lead Plastic DIP, SOIC, and SOIC
G = +2
R
V
IN
L
FUNCTIONAL BLOCK DIAGRAM
= 100
= 50mV
OUT1
–IN1
+IN1
V–
200mV
Dual 600 MHz, 50 mW
SIDE 1
SIDE 2
4
1
2
3
10M
AD8002
FREQUENCY – Hz
SIDE 2
100M
8
7
6
5
SIDE 2
SIDE 1
G = +2
1V STEP
V+
OUT2
–IN2
+IN2
AD8002
5ns
SIDE 1
1G
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9

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AD8002 Summary of contents

Page 1

... The outstanding bandwidth of 600 MHz along with 1200 V/µs of slew rate make the AD8002 useful in many general purpose high speed applications where dual power supplies ± and single supplies from are needed. The AD8002 is available in the industrial temperature range of –40°C to +85° ...

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... –V = – –V = – – –T MIN MAX T –T MIN MAX unless otherwise noted.) C AD8002A Min Typ Max Unit 500 MHz 600 MHz 500 MHz 600 MHz 500 MHz 600 MHz 60 MHz 90 MHz ...

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 AD8002 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

... SIDE STEP SIDE 2 200mV 100 IN L PULSE GENERATOR 250ps R F 5ns 5ns 750 10 F +5V 0.1 F 750 AD8002 75 0 –5V SIDE 100mV STEP SIDE 2 20mV 5ns SIDE 1 1V STEP SIDE 2 20mV 5ns = 100 ...

Page 5

... NOTES: SIDE 1: V Ω 0.02 0.01 0.00 –0.01 –0. 750 F NTSC 0.08 0.06 0.04 0.02 0.00 100M 1 Ω AD8002 OUTPUT SIDE 1 5.0V OUTPUT SIDE 2 1M 10M 100M FREQUENCY – SIDE 750 100 L SIDE 2 5ns = 0V; 8mV/div RTO IN SIDE 2: 1V STEP RTO; 400mV/div 2 BACK-TERMINATED ...

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... AD8002 50mV 953 100 L 0 –1 –2 75 – –4 953 –5 –6 1M 10M 100M FREQUENCY – Hz – 100 – p-p OUT –60 –70 2ND HARMONIC –80 –90 –100 10k 100k 1M FREQUENCY – Hz – – ...

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... JUNCTION TEMPERATURE – –1 S –2 –3 85 105 125 –55 –35 11.5 11.0 10.5 10.0 9.5 9.0 –55 –35 85 105 125 AD8002 STEP R = 750 100 L ERROR, (0.05%/DIV) OUTPUT INPUT 400mV DEVICE #1 DEVICE #2 DEVICE #3 – 105 JUNCTION TEMPERATURE – – ...

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... AD8002 120 115 110 105 100 |SINK –55 –35 – JUNCTION TEMPERATURE – C 100 INVERTING CURRENT V 10 NONINVERTING CURRENT V VOLTAGE NOISE V 1 100 1k 10 FREQUENCY – Hz –48 –49 –50 –CMRR –51 –52 –53 –54 –55 –56 – ...

Page 9

... V = 200mV IN – –20 –30 –40 –50 –60 = 5.0V S –70 = 100 L = 200mV –80 IN –90 30k 100k 1G 400mV 20mV AD8002 –PSRR +PSRR 1M 10M 100M 500M FREQUENCY – –2 SIDE 1 2V STEP R = 549 F SIDE 2 5ns 549 274 50 61 –1 100mV STEP SIDE 549 ...

Page 10

... AD8002 THEORY OF OPERATION A very simple analysis can put the operation of the AD8002, a current feedback amplifier, in familiar terms. Being a current feedback amplifier, the AD8002’s open-loop behavior is expressed as transimpedance, ∆V /∆ The open-loop transim- O –IN Z pedance behaves just as the open-loop voltage gain of a voltage feedback amplifier, that is, it has a large dc value and decreases at roughly 6 dB/octave in frequency ...

Page 11

... The AD8002 also drives four back-terminated loads (two each), as shown in Figure 9, with equally impressive performance (0.01%, 0.07°). Another important consideration is isolation between loads in a multiple load application. The AD8002 has more than isolation at 5 MHz when driv- ing two 75 Ω back-terminated loads ...

Page 12

... The AD8002 is well suited for driving high-speed analog-to- digital converters such as the AD9058. The AD9058 is a dual 8-bit 50 MSPS ADC. In Figure 10, the AD8002 is shown driv- ing the inputs of the AD9058 which are configured for ranges. Bipolar input signals are buffered, amplified (–2×), and offset (by 1 ...

Page 13

... Single-Ended-to-Differential Driver Using an AD8002 The two halves of an AD8002 can be configured to create a single-ended-to-differential high-speed driver with a –3 dB bandwidth in excess of 200 MHz, as shown in Figure 11. Although the individual op amps are each current feedback, the overall architecture yields a circuit with attributes normally associated with voltage feedback amplifiers, while offering the speed advan- tages inherent in current feedback amplifiers ...

Page 14

... AD8002 Layout Considerations The specified high-speed performance of the AD8002 requires careful attention to board layout and component selection. Proper R design techniques and low parasitic component selec- F tion 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 impedance ground path ...

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... AD8002 ...

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... AD8002 ...

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... AD8002 ...

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... AD8002 0.0098 (0.25) 0.0040 (0.10) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Lead Plastic DIP (N-8) 0.430 (10.92) 0.348 (8.84 0.280 (7.11) 0.240 (6.10 0.325 (8.25) PIN 1 0.100 (2.54) 0.300 (7.62) BSC 0.060 (1.52) 0.210 0.015 (0.38) (5.33) MAX 0.130 0.160 (4.06) (3.30) MIN 0.115 (2.93) 0.015 (0.381) 0.022 (0.558) 0.070 (1.77) SEATING 0.008 (0.204) PLANE 0.014 (0.356) ...

Page 19

... Location Data Sheet changed from REV REV. D. MAX RATINGS changed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Revision History– AD8002 Page ...

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