ADA4932-1_09 datasheet, PDF - EEWORLD Datasheet

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ADA4932-1_09: DescriptionLow Power Differential ADC Driver; File Size501KB，28 Pages; ManufacturerADI; Websitehttps://www.analog.com

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ADA4932-1_09 Overview

Low Power Differential ADC Driver

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Low Power

Differential ADC Driver

ADA4932-1/ADA4932-2

FEATURES

High performance at low power

High speed

−3 dB bandwidth of 560 MHz, G = 1

0.1 dB gain flatness to 300 MHz

Slew rate: 2800 V/μs, 25% to 75%

Fast 0.1% settling time of 9 ns

Low power: 9.6 mA per amplifier

Low harmonic distortion

100 dB SFDR @ 10 MHz

90 dB SFDR @ 20 MHz

Low input voltage noise: 3.6 nV/√Hz

±0.5 mV typical input offset voltage

Externally adjustable gain

Can be used with fractional differential gains

Differential-to-differential or single-ended-to-differential

operation

Adjustable output common-mode voltage

Input common-mode range shifted down by 1 V

Wide supply range: +3 V to ±5 V

Available in 16-lead and 24-lead LFCSP packages

FUNCTIONAL BLOCK DIAGRAMS

16 –V

15 –V

13 –V

12 PD

11 –OUT

10 +OUT

9 V

OCM

–FB 1

+IN 2

–IN 3

+FB 4

ADA4932-1

14 –V

Figure 1. ADA4932-1

+IN1

–FB1

–V

PD1

–OUT1

–IN1

+FB1

–FB2

+IN2

ADA4932-2

+OUT1

OCM1

–V

PD2

–OUT2

–IN2

+FB2

OCM2

+OUT2

07752-001

APPLICATIONS

ADC drivers

Single-ended-to-differential converters

IF and baseband gain blocks

Differential buffers

Line drivers

–40

–50

HARMONIC DISTORTION (dBc)

Figure 2. ADA4932-2

OUT, dm

= 2V p-p

HD2,

HD3,

HD2,

HD3,

–60

–70

–80

–90

–100

–110

–120

–130

–140

100k

GENERAL DESCRIPTION

The ADA4932-x is the next generation AD8132 with higher

performance, and lower noise and power consumption. It is an

ideal choice for driving high performance ADCs as a single-ended-

to-differential or differential-to-differential amplifier. The output

common-mode voltage is user adjustable by means of an internal

common-mode feedback loop, allowing the ADA4932-x output

to match the input of the ADC. The internal feedback loop also

provides exceptional output balance as well as suppression of

even-order harmonic distortion products.

With the ADA4932-x, differential gain configurations are easily

realized with a simple external four-resistor feedback network that

determines the closed-loop gain of the amplifier.

The ADA4932-x is fabricated using the Analog Devices, Inc.,

proprietary silicon-germanium (SiGe) complementary bipolar

process, enabling it to achieve low levels of distortion and noise

at low power consumption. The low offset and excellent dynamic

performance of the ADA4932-x make it well suited for a wide

variety of data acquisition and signal processing applications.

Rev. A

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.

07752-002

10M

FREQUENCY (Hz)

100M

Figure 3. Harmonic Distortion vs. Frequency at Various Gains

The ADA4932-x is available in a Pb-free, 3 mm × 3 mm 16-lead

LFCSP (ADA4932-1, single) or a Pb-free, 4 mm × 4 mm 24-lead

LFCSP (ADA4932-2, dual). The pinout has been optimized to

facilitate PCB layout and minimize distortion. The ADA4932-1

and the ADA4932-2 are specified to operate over the −40°C to

+105°C temperature range; both operate on supplies between

+3 V and ±5 V.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

07752-003

ADA4932-1/ADA4932-2

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Functional Block Diagrams ............................................................. 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

±5 V Operation ............................................................................. 3

5 V Operation ............................................................................... 5

Absolute Maximum Ratings............................................................ 7

Thermal Resistance ...................................................................... 7

Maximum Power Dissipation ..................................................... 7

ESD Caution .................................................................................. 7

Pin Configurations and Function Descriptions ........................... 8

Typical Performance Characteristics ............................................. 9

Test Circuits ..................................................................................... 17

Terminology .................................................................................... 18

Theory of Operation ...................................................................... 19

Applications Information .............................................................. 20

Analyzing an Application Circuit ............................................ 20

Setting the Closed-Loop Gain .................................................. 20

Estimating the Output Noise Voltage ...................................... 20

Impact of Mismatches in the Feedback Networks ................. 21

Calculating the Input Impedance for an Application

Circuit .......................................................................................... 21

Input Common-Mode Voltage Range ..................................... 23

Input and Output Capacitive AC Coupling ............................ 23

Setting the Output Common-Mode Voltage .......................... 23

Layout, Grounding, and Bypassing .............................................. 24

High Performance ADC Driving ................................................. 25

Outline Dimensions ....................................................................... 26

Ordering Guide .......................................................................... 26

REVISION HISTORY

8/09—Rev. 0 to Rev. A

Changes to Features Section............................................................ 1

Changes to Figure 11 ........................................................................ 9

Changes to Figure 43 and Figure 45 ............................................. 15

Changes to Figure 52, Figure 53, and Figure 54 ......................... 17

10/08—Revision 0: Initial Version

Rev. A | Page 2 of 28

ADA4932-1_09 Related Products

	ADA4932-1_09	ADA4932-1YCPZ-R21	ADA4932-1YCPZ-R71	ADA4932-1YCPZ-RL1	ADA4932-2YCPZ-R21	ADA4932-2YCPZ-R71	ADA4932-2YCPZ-RL1
Description	Low Power Differential ADC Driver	Low Power Differential ADC Driver	Low Power Differential ADC Driver	Low Power Differential ADC Driver	Low Power Differential ADC Driver	Low Power Differential ADC Driver	Low Power Differential ADC Driver

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