Dual 350 MHz
Low Power Amplifier
AD8012
*
FEATURES
Low Power
1.7 mA/Amplifier Supply Current
Fully Specified for 5 V and +5 V Supplies
High Output Current, 125 mA
High Speed
350 MHz, –3 dB Bandwidth (G = +1)
150 MHz, –3 dB Bandwidth (G = +2)
2,250 V/ s Slew Rate
20 ns Settling Time to 0.1%
Low Distortion
–72 dBc Worst Harmonic @ 500 kHz, R
L
= 100
–66 dBc Worst Harmonic @ 5 MHz, R
L
= 1 k
Good Video Specifications (R
L
= 1 k , G = +2)
0.02% Differential Gain Error
0.06 Differential Phase Error
Gain Flatness 0.1 dB to 40 MHz
60 ns Overdrive Recovery
Low Offset Voltage, 1.5 mV
Low Voltage Noise, 2.5 nV/√Hz
Available in 8-Lead SOIC and 8-Lead MSOP
APPLICATIONS
XDSL, HDSL Line Drivers
ADC Buffers
Professional Cameras
CCD Imaging Systems
Ultrasound Equipment
Digital Cameras
PRODUCT DESCRIPTION
DISTORTION – dBc
FUNCTIONAL BLOCK DIAGRAM
OUT1
–IN1
+IN1
–V
S
1
2
3
4
8 +V
S
7 OUT2
6 –IN2
AD8012
5 +IN2
–40
G = +2
V
OUT
= 2V p-p
R
F
= 750
–50
–60
THIRD
–70
–80
SECOND
The AD8012 is a dual, low power, current feedback amplifier
capable of providing 350 MHz bandwidth while using only
1.7 mA per amplifier. It is intended for use in high frequency,
wide dynamic range systems where low distortion and high
speed are essential and low power is critical.
With only 1.7 mA of supply current, the AD8012 also offers
exceptional ac specifications such as 20 ns settling time and
2,250 V/µs slew rate. The video specifications are 0.02% differ-
ential gain and 0.06 degree differential phase, excellent for such
a low power amplifier. In addition, the AD8012 has a low offset
of 1.5 mV.
The AD8012 is well suited for any application that requires high
performance with minimal power.
The product is available in standard 8-lead SOIC or MSOP
packages and operates over the industrial temperature range
–40°C to +85°C.
*Protected
under U.S. Patent Number 5,537,079.
–
+
–90
10
100
R
L
–
1k
Figure 1. Distortion vs. Load Resistance, V
S
=
±
5 V,
Frequency = 500 kHz
+V
S
R1
AMP 1
+
V
IN
V
REF
R
L
= 100
OR
135
R2
Np:Ns
TRANSFORMER
V
OUT
LINE
POWER
IN dB
–
–V
S
Figure 2. Differential Drive Circuit for XDSL Applications
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. 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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
© 2003 Analog Devices, Inc. All rights reserved.
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