ADA4960-1 Analog Devices, ADA4960-1 Datasheet

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ADA4960-1

Manufacturer Part Number
ADA4960-1
Description
Low Distortion Ultrahigh Speed Differential ADC Driver
Manufacturer
Analog Devices
Datasheet

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Preliminary Technical Data
FEATURES
Adjustable output common-mode voltage
Externally adjustable gain
−3 dB bandwidth of 3GHz, (all gains)
Low harmonic distortion (H2/H3 SE->DIFF)
IMD3 @ 1GHz = 67dBc
Slew rate 8000 V/μs
Fast overdrive recovery of 1 ns
Low input voltage noise of 3.6 nV/√Hz
Low power dissipation: 60 mA quiescent current
0.1 dB gain flatness to TBD MHz
Available in 16-Lead and 24-Lead LFSCP packages
APPLICATIONS
ADC drivers for giga-sample ADCs
Single-ended-to-differential converters
RF/IF gain block
Line drivers
Oscilloscopes
Satellite Communications
Data Acquisition
Electronic Surveillance and Countermeasures
GENERAL DESCRIPTION
The ADA4960-1 is a high performance differential amplifier
optimized for RF and IF applications. It achieves better than
63dB SFDR performance at frequencies up to 500 MHz, and
52dB up to 1GHz, making it an ideal driver for high speed 8-bit
to 10-bit giga-sample analog-to-digital converters (ADCs).
Unlike other wideband differential amplifiers, the ADA4960-1
has buffered inputs that isolate the gain-setting resistor (RG)
from the signal inputs. As a result, the ADA4960-1 maintains a
constant 10 kΩ differential input resistance for gains of 6 dB to
15 dB, easing matching and input drive requirements. The
ADA4960-1 has a nominal 150 Ω differential output resistance.
The device is optimized for wideband, low distortion performance
at frequencies up to and beyond 1 GHz. These attributes,
together with its wide gain adjust capability make this device
the amplifier of choice for general-purpose IF and broadband
applications where low distortion, noise, and power are critical.
Rev. PrB
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. Specifications subject to change without notice. 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.
-77/-67 dBc @ 250 MHz
-69/-63 dBc @ 500 MHz
-52/-63 dBc @ 1GHz
Low Distortion Ultrahigh Speed
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The device also includes a unity gain buffer, for the buffering of
DC signals such as the common-mode-input to the amplifier.
This buffer is found between pins 6 (input) and pin5 (output).
If this buffer is not used, the output can be left disconnected
and the input can be grounded.
It is ideally suited for driving not only ADCs, but also mixers,
pin diode attenuators, SAW filters, and multi-element discrete
devices, as well as buffering high frequency DACs. The device
will be available in a single channel version in 3 mm ×3 mm,
16-lead LFCSP package or a dual channel version in 4 mm x 4
mm, 24-lead LFSCP. The device operates over a temperature
range of −40°C to +105°C.
Differential ADC Driver
PIN CONFIGURATION
©2009 Analog Devices, Inc. All rights reserved.
Figure 1.
ADA4960-1
www.analog.com

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ADA4960-1 Summary of contents

Page 1

... Unlike other wideband differential amplifiers, the ADA4960-1 has buffered inputs that isolate the gain-setting resistor (RG) from the signal inputs result, the ADA4960-1 maintains a constant 10 kΩ differential input resistance for gains dB, easing matching and input drive requirements. The ADA4960-1 has a nominal 150 Ω ...

Page 2

... ADA4960-1 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Pin Configuration ............................................................................. 1 General Description ......................................................................... 1 REVISION HISTORY 12/09—Revision PrA: Preliminary Version www.DataSheet4U.com Preliminary Technical Data   Revision History ................................................................................2   Specifications .....................................................................................3   Pin Configuration and Function Description ...............................5   Outline Dimensions ..........................................................................6 Rev. PrB | Page         ...

Page 3

... 2.5 OS OCM IP IN OCM 100 KHz ΔV /ΔV (dm), ΔV = ±1 V OCM O OCM Rev. PrB | Page ADA4960-1 = −40°C to +105°C. MAX Min Typ Max Unit 3000 MHz MHz 8000 V/μ -77/-67 dBc -69/63 dBc -52/-63 dBc -80/-67 dBc ...

Page 4

... ADA4960-1 Parameter POWER SUPPLY Operating Range Quiescent Current +PSRR −PSRR OPERATING TEMPERATURE RANGE www.DataSheet4U.com Conditions Change ± Change in −V = ± Rev. PrB | Page Preliminary Technical Data Min Typ Max Unit −40 +105 °C ...

Page 5

... Common-Mode Voltage. A voltage applied to this pin sets the common-mode voltage of the input and output. Typically decoupled to ground with a 0.1 μF capacitor. With no reference applied, input and output common mode floats to midsupply (VCC/2). Enable. Apply positive voltage (1.3 V < ENB < VCC) to activate device. Ground. Connect to low impedance GND. Rev. PrB | Page ADA4960-1 ...

Page 6

... ADA4960-1 OUTLINE DIMENSIONS PIN 1 INDICATOR 1.00 0.85 0.80 SEATING PLANE www.DataSheet4U.com ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR08458-0-12/09(PrB) 3.00 0.60 MAX BSC SQ 0.45 2.75 TOP BSC SQ VIEW 0.50 BSC 1.50 REF 0.80 MAX 12° MAX 0.65 TYP 0.05 MAX 0.02 NOM 0.30 0.20 REF ...

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