MAX4000EUA+T【PDF 1/19 页】IC CNTRLR RF-DETECT 8-MSOP

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19-2288; Rev 2; 12/07

2.5GHz 45dB RF-Detecting Controllers

General Description

The MAX4000/MAX4001/MAX4002 low-cost, low-power

logarithmic amplifiers are designed to control RF power

amplifiers (PA) operating in the 0.1GHz to 2.5GHz fre-

quency range. A typical dynamic range of 45dB makes

this family of log amps useful in a variety of wireless appli-

cations including cellular handset PA control, transmitter

power measurement, and RSSI for terminal devices.

Logarithmic amplifiers provide much wider measurement

range and superior accuracy to controllers based on

diode detectors. Excellent temperature stability is

achieved over the full operating range of -40°C to +85°C.

The choice of three different input voltage ranges elimi-

nates the need for external attenuators, thus simplifying

PA control-loop design. The logarithmic amplifier is a volt-

age-measuring device with a typical signal range of

-58dBV to -13dBV for the MAX4000, -48dBV to -3dBV for

the MAX4001, and -43dBV to +2dBV for the MAX4002.

The input signal for the MAX4000 is internally AC-coupled

using an on-chip 5pF capacitor in series with a 2k Ω input

resistance. This highpass coupling, with a corner at

16MHz, sets the lowest operating frequency and allows

the input signal source to be DC grounded. The

MAX4001/MAX4002 require an external coupling capaci-

Features

? Complete RF-Detecting PA Controllers

? Variety of Input Ranges

MAX4000: -58dBV to -13dBV

(-45dBm to 0dBm in 50 Ω )

MAX4001: -48dBV to -3dBV

(-35dBm to +10dBm in 50 Ω )

MAX4002: -43dBV to +2dBV

(-30dBm to +15dBm in 50 Ω )

? Frequency Range from 100MHz to 2.5GHz

? Temperature Stable Linear-in-dB Response

? Fast Response: 70ns 10dB Step

? 10mA Output Sourcing Capability

? Low Power: 17mW at 3V (typ)

? Shutdown Current 30 μ A (max)

? Available in an 8-Bump UCSP and a Small 8-Pin

μ MAX Package

Ordering Information

tor in series with the RF input port. These PA controllers

feature a power-on delay when coming out of shutdown,

holding OUT low for approximately 5μs to ensure glitch-

free controller output.

The MAX4000/MAX4001/MAX4002 family is available in

an 8-pin μMAX ? package and an 8-bump chip-scale

package (UCSP?). The device consumes 5.9mA with a

5.5V supply, and when powered down the typical shut-

down current is 13μA.

PART

MAX4000 EBL-T

MAX4000EUA

MAX4001 EBL-T

MAX4001EUA

MAX4002 EBL-T

MAX4002EUA

TEMP RANGE

-40 ° C to +85°C

PIN-

PACKAGE

8 UCSP-8

8 μMAX

8 UCSP-8

8 μMAX

8 UCSP-8

8 μMAX

TOP

MARK

ABF

—

ABE

—

ABD

—

Applications

Transmitter Power Measurement and Control

TSSI for Wireless Terminal Devices

Cellular Handsets (TDMA, CDMA, GPRS, GSM)

RSSI for Fiber Modules

Pin Configurations appear at end of data sheet.

Functional Diagram

SHDN

V CC

OUTPUT

ENABLE

DELAY

DET

OUT

RFIN

CLPF

10dB

V-I

SET

μMAX is a registered trademark of Maxim Integrated Products, Inc.

UCSP is a trademark of Maxim Integrated Products, Inc.

GND

(PADDLE)

OFFSET

COMP

LOW-

NOISE

BANDGAP

MAX4000

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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