a
FEATURES
Low-Noise Amplifiers Provide Low Noise and Low
Distortion, Ideal for xDSL Modem Receiver
+5 V to 12 V Voltage Supply
Low-Power Consumption
4.0 mA/Amp (Typ) Supply Current
Voltage Feedback Amplifiers
Low Noise and Distortion
2.5 nV/√Hz Voltage Noise @ 100 kHz
SFDR –95 dBc @ 1 MHz
MTPR < –66 dBc
High Speed
120 MHz Bandwidth (–3 dB), G = 1
50 V/ s Slew Rate
Low-Offset Voltage, 1.5 mV Typical
APPLICATIONS
ADSL, VDSL, HDSL, and Proprietary xDSL Systems
Low-Noise Instrumentation Front End
Ultrasound Preamp
Dual High-Speed
Low-Noise Op Amps
AD8022
FUNCTIONAL BLOCK DIAGRAM
AD8022
–
+
OUT1
1
–IN1
2
+IN1
3
–V
S 4
8
+V
S
7
OUT2
–
+
6
–IN2
5
+IN2
PRODUCT DESCRIPTION
3.0
VOLTAGE NOISE, nV
2.5
The AD8022 consists of two low-noise, high-speed, voltage feed-
back amplifiers. Both inputs add only 2.5 nV/√Hz of voltage
noise. These dual amplifiers provide wideband, low-distortion
performance, with high-output current optimized for stability
when driving capacitive loads. Operating from +5 V to
±
12 V
supplies, the AD8022 typically consumes only 4.0 mA/Amp
quiescent current. The AD8022 is available in both an 8-lead
microSOIC and an 8-lead SOIC package. Fast overvoltage
recovery and wide bandwidth make the AD8022 ideal as the
receive channel front end to an ADSL, VDSL or proprietary
xDSL transceiver design.
Low-noise receive amplifiers in the AD8022 are independent
voltage feedback amplifiers and can be configured as the differ-
ential receiver from the line transformer or as independent active
filters in an xDSL line interface circuit.
pA AND nV/ Hz
2.0
1.5
CURRENT NOISE, pA
1.0
0.5
0
10k
100k
FREQUENCY – Hz
1M
Figure 1. Current and Voltage Noise vs. Frequency
REV. 0
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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.
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Tel: 781/329-4700
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Fax: 781/326-8703
© Analog Devices, Inc., 1999
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