REV. C
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.
a
AD8001
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 1999
800 MHz, 50 mW
Current Feedback Amplifier
FEATURES
Excellent Video Specifications (R
L
= 150 V, G = +2)
Gain Flatness 0.1 dB to 100 MHz
0.01% Differential Gain Error
0.0258 Differential Phase Error
Low Power
5.5 mA Max Power Supply Current (55 mW)
High Speed and Fast Settling
880 MHz, –3 dB Bandwidth (G = +1)
440 MHz, –3 dB Bandwidth (G = +2)
1200 V/ms Slew Rate
10 ns Settling Time to 0.1%
Low Distortion
–65 dBc THD, f
C
= 5 MHz
33 dBm 3rd Order Intercept, F
1
= 10 MHz
–66 dB SFDR, f = 5 MHz
High Output Drive
70 mA Output Current
Drives Up to Four Back-Terminated Loads (75 V Each)
While Maintaining Good Differential Gain/Phase
Performance (0.05%/0.258)
APPLICATIONS
A-to-D Driver
Video Line Driver
Professional Cameras
Video Switchers
Special Effects
RF Receivers
FUNCTIONAL BLOCK DIAGRAMS
8-Lead DIP (N-8, Q-8) 5-Lead
and SOIC (SO-8) SOT-23-5
1
2
3
4
8
7
6
5
AD8001
NC NC
–IN
NC
+IN
NC = NO CONNECT
OUT
V–
V+
1V
OUT
AD8001
–V
S
+IN
2
34
5 +V
S
–IN
PRODUCT DESCRIPTION
The AD8001 is a low power, high-speed amplifier designed
to operate on – 5 V supplies. The AD8001 features unique
GAIN – dB
9
6
–12
10M 100M 1G
3
0
–3
–6
–9
FREQUENCY – Hz
V
S
= 65V
R
FB
= 820V
V
S
= 65V
R
FB
= 1kV
G = +2
R
L
= 100V
Figure 1. Frequency Response of AD8001
transimpedance linearization circuitry. This allows it to drive
video loads with excellent differential gain and phase perfor-
mance on only 50 mW of power. The AD8001 is a current
feedback amplifier and features gain flatness of 0.1 dB to 100 MHz
while offering differential gain and phase error of 0.01% and
0.025 . This makes the AD8001 ideal for professional video
electronics such as cameras and video switchers. Additionally,
the AD8001’s low distortion and fast settling make it ideal for
buffer high-speed A-to-D converters.
The AD8001 offers low power of 5.5 mA max (V
S
= – 5 V) and
can run on a single +12 V power supply, while being capable of
delivering over 70 mA of load current. These features make this
amplifier ideal for portable and battery-powered applications
where size and power are critical.
The outstanding bandwidth of 800 MHz along with 1200 V/m s
of slew rate make the AD8001 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 AD8001 is
available in the industrial temperature range of –40 C to +85 C.
Figure 2. Transient Response of AD8001; 2 V Step, G = +2