a
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 microSOIC
APPLICATIONS
XDSL, HDSL Line Driver
ADC Buffer
Professional Cameras
CCD Imaging System
Ultrasound Equipment
Digital Camera
PRODUCT DESCRIPTION
DISTORTION – dBc
OUT1
–IN1
+IN1
–V
S
Dual 350 MHz
Low Power Amplifier
AD8012
*
FUNCTIONAL BLOCK DIAGRAM
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
–70
3rd
–80
2nd
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, high speed
are essential and low power is critical.
With only 1.7 mA of supply current, the AD8012 also offers
exceptional ac specs such as 20 ns settling time and 2,250 V/µs
slew rate. The video specifications are 0.02% differential 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 micro-
SOIC packages and operates over the industrial temperature
range –40°C to +85°C.
–90
10
100
R
L
–
1k
Figure 1. Distortion vs. Load Resistance, V
S
=
±
5 V,
Frequency = 500 kHz
+V
S
+
AMP 1
R1
+
V
IN
V
REF
R
L
= 100
OR
135
R2
V
OUT
LINE
POWER
IN dB
–
–
–V
S
Np:Ns
TRANSFORMER
Figure 2. Differential Drive Circuit for XDSL Applications
*Protected
under U.S. Patent Number 5,537,079.
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.
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
AD [ ANALOG DEVICES ]
