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AD8351ARMZ Datasheet, PDF (1/16 Pages) Analog Devices – Low Distortion Differential RF/IF Amplifier | |||
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FEATURES
â3 dB Bandwidth of 2.2 GHz for AV = 12 dB
Single Resistor Programmable Gain
0 dB ⤠AV ⤠26 dB
Differential Interface
Low Noise Input Stage 2.7 nV/âHz @ AV = 10 dB
Low Harmonic Distortion
â79 dBc Second @ 70 MHz
â81 dBc Third @ 70 MHz
OIP3 of 31 dBm @ 70 MHz
Single-Supply Operation: 3 V to 5.5 V
Low Power Dissipation: 28 mA @ 5 V
Adjustable Output Common-Mode Voltage
Fast Settling and Overdrive Recovery
Slew Rate of 13,000 V/â®s
Power-Down Capability
10-Lead MSOP Package
APPLICATIONS
Differential ADC Drivers
Single-Ended-to-Differential Conversion
IF Sampling Receivers
RF/IF Gain Blocks
SAW Filter Interfacing
GENERAL DESCRIPTION
The AD8351 is a low cost differential amplifier useful in RF and
IF applications up to 2.2 GHz. The voltage gain can be set from
unity to 26 dB using a single external gain resistor. The AD8351
provides a nominal 150 ⦠differential output impedance. The
excellent distortion performance and low noise characteristics of
this device allow for a wide range of applications.
The AD8351 is designed to satisfy the demanding performance
requirements of communications transceiver applications. The
device can be used as a general-purpose gain block, an ADC driver,
Low Distortion
Differential RF/IF Amplifier
AD8351
FUNCTIONAL BLOCK DIAGRAM
PWUP
AD8351
BIAS CELL
RGP1
INHI
INLO
RGP2
VOCM
VPOS
OPHI
OPLO
COMM
0
â10
AD8351 WITH 10 dB OF
GAIN DRIVING THE
â20
AD6645 (RL = 1kâ)
ANALOG INPUT: 70MHz
â30
ENCODE : 80MHz
SNR : 69.1dB
FUND : â1.1dBFS
â40
HD2 : â78.5dBc
HD3 : â80.7dBc
â50 THD : â75.9dBc
SFDR : 78.2dBc
â60
INHI
RG
200â
INLO
100nF 25â
AADD88335511
100nF 25â
â70
2
â80
â90
+
â100
â110
â120
â130 0
5
10
15
20
25
30
AD6645
14-BIT ADC
3
35
and a high speed data interface driver, among other functions. The
AD8351 can also be used as a single-ended-to-differential
amplifier with similar distortion products as in the differential
configuration. The exceptionally good distortion performance
makes the AD8351 an ideal solution for 12-bit and 14-bit IF
sampling receiver designs.
Fabricated in ADIâs high speed XFCB process, the AD8351
has high bandwidth that provides high frequency performance
and low distortion. The quiescent current of the AD8351 is 28 mA
typically. The AD8351 amplifier comes in a compact 10-lead
MSOP package and will operate over the temperature range
of â40°C to +85°C.
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
www.analog.com
Fax: 781/326-8703 © 2004 Analog Devices, Inc. All rights reserved.
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