ADA4938-1YCPZ-R2 AD [Analog Devices], ADA4938-1YCPZ-R2 Datasheet

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ADA4938-1YCPZ-R2

Manufacturer Part Number
ADA4938-1YCPZ-R2
Description
Ultra-Low Distortion Differential ADC Driver
Manufacturer
AD [Analog Devices]
Datasheet
Preliminary Technical Data
FEATURES
Extremely low harmonic distortion
Low input voltage noise: 2.2 nV/√Hz
High speed
1 mV typical offset voltage
Externally adjustable gain
Differential to differential or single-ended to differential
Adjustable output common-mode voltage
Wide Supply Voltage Range: +5 V & ± 5 V
Pb-free 3 mm x 3 mm LFCSP package
APPLICATIONS
ADC drivers
Single-ended-to-differential converters
IF and baseband gain blocks
Differential buffers
Line drivers
GENERAL DESCRIPTION
The ADA4938-1 is a low noise, ultra-low distortion, high speed
differential amplifier. It is an ideal choice for driving high
performance ADCs with resolutions up to 16 bits from dc to 70
MHz. The output common mode voltage is adjustable over a
wide range, allowing the ADA4938-1 to match the input of the
ADC. The internal common mode feedback loop also provides
exceptional output balance as well as suppression of even-order
harmonic distortion products.
Full differential and single-ended to differential gain
configurations are easily realized with the ADA4938-1. A
simple external feedback network of four resistors determines
the amplifier’s closed-loop gain.
Rev. PrA
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.
−108 dBc HD2 @ 10 MHz
−79 dBc HD2 @ 70 MHz
−125 dBc HD3 @ 10 MHz
−87 dBc HD3 @ 70 MHz
−3 dB bandwidth of 1.5 GHz, G = 1
Slew rate: 4700 V/μs
0.1 dB gain flatness to 125 MHz
Fast settling to 0.01% in 8.5 ns
Fast overdrive recovery of 4 ns
operation
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The ADA4938-1 is fabricated using ADI’s proprietary third
generation high-voltage XFCB process, enabling it to achieve
very low levels of distortion with input voltage noise of only 2.2
nV/√Hz. The low dc offset and excellent dynamic performance
of the ADA4938-1 make it well suited for a wide variety of data
acquisition and signal processing and applications.
The ADA4938-1 is available in a Pb-free, 3 mm x 3mm lead
frame chip scale package (LFCSP). It is specified to operate
over the extended industrial temperature range of −40°C to
+85°C.
FUNCTIONAL BLOCK DIAGRAM
Differential ADC Driver
Ultra-Low Distortion
©2006 Analog Devices, Inc. All rights reserved.
Figure 1.
ADA4938-1
www.analog.com

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ADA4938-1YCPZ-R2 Summary of contents

Page 1

... XFCB process, enabling it to achieve very low levels of distortion with input voltage noise of only 2.2 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4938-1 make it well suited for a wide variety of data acquisition and signal processing and applications. The ADA4938-1 is available in a Pb-free 3mm lead frame chip scale package (LFCSP specified to operate over the extended industrial temperature range of − ...

Page 2

... ADA4938-1 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Dual Supply Operation ................................................................ 3 REVISION HISTORY 12/06—Revision PrA: Initial Version Preliminary Technical Data Single Supply Operation...............................................................5 Absolute Maximum Ratings ............................................................7 Thermal Resistance .......................................................................7 ESD Caution...................................................................................7 Pin Configuration and Function Descriptions..............................8 Outline Dimensions ..........................................................................9 Ordering Guide ...

Page 3

... V OS, cm OUT, cm DIN+ DIN– ∆V /∆V ; ∆V = ±1 V OUT, dm OCM OCM ∆V /∆V ; ∆V = ±1 V OUT, cm OCM OCM Rev. PrA | Page ADA4938-1 Min Typ Max Unit 1500 MHz 125 MHz 1300 MHz 800 MHz 4700 V/μs 8 −108 dBc − ...

Page 4

... ADA4938-1 Parameter Operating Range Quiescent Current Power Supply Rejection Ratio POWER DOWN ( Input Voltage Turn-Off Time Turn-On Time PD Bias Current Enabled Disabled OPERATING TEMPERATURE RANGE Conditions variation MIN MAX Powered down ∆V /∆V ; ∆V = ±1 V OUT Powered down ...

Page 5

... OCM ∆V /∆V ; ∆V = ±1 V OUT, dm OCM OCM ∆V /∆V ; ∆V = ±1 V OUT, cm OCM OCM variation MIN MAX Rev. PrA | Page ADA4938-1 Min Typ Max Unit 1500 MHz 125 MHz 1100 MHz 3900 V/μs 8 −115 dBc −87 dBc − ...

Page 6

... ADA4938-1 Parameter Power Supply Rejection Ratio POWER DOWN ( Input Voltage Turn-Off Time Turn-On Time PD Bias Current Enabled Disabled OPERATING TEMPERATURE RANGE Conditions Powered down ∆V /∆V ; ∆V = ±1 V OUT Powered down Enabled Rev. PrA | Page ...

Page 7

... Package Type θ 16-Lead LFCSP (Exposed Pad) TBD Maximum Power Dissipation The maximum safe power dissipation in the ADA4938-1 package is limited by the associated rise in junction temperature ( the die. At approximately 150°C, which J is the glass transition temperature, the plastic changes its properties ...

Page 8

... ADA4938-1 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic 1 FB -OUT B 2 +IN 3 − +OUT OCM 10 +OUT 11 −OUT −V S PIN 1 INDICATOR -OUT + -OUT - +OUT TOP VIEW ...

Page 9

... Preliminary Technical Data OUTLINE DIMENSIONS PIN 1 INDICATOR 12° MAX 0.90 0.85 0.80 SEATING PLANE ORDERING GUIDE Model Ordering Quantity ADA4938-1YCPZ-R2 5,000 ADA4938-1YCPZ-RL 1,500 ADA4938-1YCPZ-R7 250 ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR06592-0-12/06(PrA) 3.00 0.60 MAX BSC SQ 0.45 2 ...

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