Datasheet AD8351 (Analog Devices)

Low Distortion Differential RF/IF Amplifier Data Sheet AD8351 FEATURES FUNCTIONAL BLOCK DIAGRAM −3 dB bandwidth of 2.2 GHz for AV = 12 dB AD8351 Single resistor programmable gain: 0 dB ≤ AV ≤ 26 dB VOCM PWUP BIAS CELL Differential interface VPOS Low noise input stage 2.7 nV/√Hz at AV = 10 dB RGP1 Low harmonic distortion −79 dBc second at 70 MHz INHI OPHI −81 dBc third at 70 MHz INLO OPLO OIP3 of 31 dBm at 70 MHz COMM Single-supply operation: 3 V to 5.5 V RGP2 Low power dissipation: 28 mA at 5 V Adjustable output common-mode voltage 0 AD8351 WITH 10dB OF 100nF –10 GAIN DRIVING THE INHI 25Ω Fast settling and overdrive recovery AD6645 (RL = 1kΩ) AD6645 –20 ANALOG INPUT = 70MHz RG AD8351 Slew rate of 13,000 V/μs ENCORE = 80MHz 200Ω 14-BIT –30 SNR = 69.1dB ADC FUND = –1.1dBFS Power-down capability HD2 = –78.5dBc INLO 25Ω –40 100nF HD3 = –80.7dBc THD = –75.9dBc APPLICATIONS –50 SFDR = 78.2dBc –60 Differential ADC drivers –70 Single-ended-to-differential conversion 2 –80 3 IF sampling receivers –90 + RF/IF gain blocks –100 SAW filter interfacing –110
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GENERAL DESCRIPTION
The AD8351 is a low cost differential amplifier useful in RF and differential configuration. The exceptionally good distortion IF applications up to 2.2 GHz. The voltage gain can be set from performance makes the AD8351 an ideal solution for 12-bit and unity to 26 dB using a single external gain resistor. The AD8351 14-bit IF sampling receiver designs. provides a nominal 150 Ω differential output impedance. The Fabricated in Analog Devices, Inc., high speed XFCB process, excellent distortion performance and low noise characteristics the AD8351 has high bandwidth that provides high frequency of this device allow for a wide range of applications. performance and low distortion. The quiescent current of the The AD8351 is designed to satisfy the demanding performance AD8351 is 28 mA typically. The AD8351 amplifier comes in a requirements of communications transceiver applications. The compact 10-lead MSOP package or in a 16-lead LFCSP package, device can be used as a general-purpose gain block, an ADC and operates over the temperature range of −40°C to +85°C. driver, 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
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BASIC CONCEPTS GAIN ADJUSTMENT COMMON-MODE ADJUSTMENT INPUT AND OUTPUT MATCHING SINGLE-ENDED-TO-DIFFERENTIAL OPERATION ADC DRIVING ANALOG MULTIPLEXING I/O CAPACITIVE LOADING TRANSMISSION LINE EFFECTS CHARACTERIZATION SETUP EVALUATION BOARD OUTLINE DIMENSIONS ORDERING GUIDE