LINEAR LTM9001 User Guide

LINEAR TECHNOLOGY MARCH 2008 VOLUME XVIII NUMBER 1

IN THIS ISSUE… Complete IF Receiver

COVER ARTICLE Has 16-Bit, 130Msps ADC, Complete IF Receiver Has 16-Bit, 130Msps ADC, Fixed-Gain Amplifier and Antialias Filter in Fixed-Gain Amplifier 11.25mm × 11.25mm µModule™ Package .............................1 Todd Nelson

and Antialias Filter in

Linear in the News… ...........................2

11.25mm × 11.25mm

DESIGN FEATURES

Voltage and Current Monitoring from 7V to 80V in 3mm × 3mm DFN-10 ........5 µModule Package Zhizhong Hou

Increase I2C or SMBus Data Rate and by Todd Nelson

Reduce Power Consumption with

Introduction

Low Power Bus Accelerator .................8 Sam Tran In the design of high speed receiv-

ers for communications, test or The LTM9001 is built using

6-Input Supervisors Offer Accurate

instrumentation equipment, several

Monitoring and 125°C Operation ......10 Linear Technology’s µModule

Shuley Nakamura and Al Hinckley specialized disciplines converge in

technology to create an IC

one place—the analog-to-digital con-

High Power, Single Inductor,

verter (ADC). Unfortunately, the ADC form factor System-in-a-

Surface Mount Buck-Boost µModule

Regulators Handle 36VIN, 10A Loads is not a simple black box where an Package (Si P) that includes

RF designer applies the signal and a

Manjing Xie a high speed 16-bit ADC,

digital designer retrieves the accurate

antialiasing filter and a low

1.5% Accurate Single-Supply output. Careful design of the signal

Supervisors Simplify Part Selection noise, differential amplifier

conditioning circuitry to drive the ADC

and Operate to 125°C ........................20

is critical. Something as seemingly with fixed gain. It can

Bob Jurgilewicz and Roger Zemke

straightforward as board layout can

digitize wide dynamic range

Versatile Current Sense Amplifiers degrade the downstream signal by a

Offer Rail-to-Rail Input, 150°C signals with an intermediate

few precious decibels. The problem

Operating Temperature ....................24

frequency (IF) range

William Jett and Glen Brisebois is that the disciplines required for

the engineering on either side of the up to 300MHz.

Compact Hot Swap™ Solution

ADC, namely RF/IF design and digital

Simplifies Advanced Mezzanine

Card Design ......................................27 design, do not include mastery of the

Chew Lye Huat

art of ADC interface design. Someone The LTM9001 is exactly that black has to put in the effort to properly drive box. It is built using Linear Technol-

DESIGN IDEAS the ADC. But who? Instead of adding ogy’s µModule™ technology to create ....................................................31–36

more work to either designer’s plate, an IC form factor System-in-a-Package

(complete list on page 31)

what if the ADC were really a black (Si P) that includes a high speed 16- box, already loaded with integrated bit ADC, antialiasing filter and a low

New Device Cameos ...........................37

signal conditioning components in an noise, differential amplifier with fixed

Design Tools ......................................39

optimized layout? Now, that would be gain. It can digitize wide dynamic range

Sales Offices .....................................40

a better solution. continued on page

L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, Over-The-Top and Poly Phase are registered trademarks of Linear Technology Corporation. Adaptive Power, Bat-Track, Bode CAD, C-Load, Direct Sense, Easy Drive, Filter CAD, Hot Swap, Linear View, µModule, Micropower Switcher CAD, Multimode Dimming, No Latency ΔΣ, No Latency Delta-Sigma, No RSENSE, Operational Filter, Panel Protect, Power Path, Power SOT, Smart Start, Soft Span, Stage Shedding, Switcher CAD, Thin SOT, True Color PWM, Ultra Fast and VLDO are trademarks of Linear Technology Corporation. Other product names may be trademarks of the companies that manufacture the products.