MAXIM MAX4000, MAX4001, MAX4002 Technical data

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 fre­quency range. A typical dynamic range of 45dB makes
this family of log amps useful in a variety of wireless appli­cations 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 elimi­nates the need for external attenuators, thus simplifying
PA control-loop design. The logarithmic amplifier is a volt­age-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 2kΩ 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 capaci­tor 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 glitch­free controller output.

The MAX4000/MAX4001/MAX4002 family is available in
an 8-pin µMAX
package (UCSP™). The device consumes 5.9mA with a

5.5V supply, and when powered down the typical shut­down current is 13µA.

®

package and an 8-bump chip-scale

Features

♦ Complete RF-Detecting PA Controllers

♦ Variety of Input Ranges

MAX4000: -58dBV to -13dBV
(-45dBm to 0dBm in 50Ω)
MAX4001: -48dBV to -3dBV
(-35dBm to +10dBm in 50Ω)
MAX4002: -43dBV to +2dBV
(-30dBm to +15dBm in 50Ω)

♦ 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 30µA (max)

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

µMAX Package

Ordering Information

PART TEMP RANGE

MAX4000EBL-T -40°C to +85°C 8 UCSP-8

MAX4000EUA -40°C to +85°C 8 µMAX
MAX4001EBL-T -40°C to +85°C 8 UCSP-8
MAX4001EUA -40°C to +85°C 8 µMAX
MAX4002EBL-T -40°C to +85°C 8 UCSP-8
MAX4002EUA -40°C to +85°C 8 µMAX

PIN­PACKAGE

TOP

MARK

ABF

—

ABE

—

ABD

—

MAX4000/MAX4001/MAX4002

Applications

Pin Configurations appear at end of data sheet.

Transmitter Power Measurement and Control

TSSI for Wireless Terminal Devices

Functional Diagram

Cellular Handsets (TDMA, CDMA, GPRS, GSM)

RSSI for Fiber Modules

OUTPUT
ENABLE

DELAY

­gm

X1

MAX4000

OUT

CLPF

SET

V-I

DET DETDET

LOW­NOISE

BANDGAP

+

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

UCSP is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ Maxim Integrated Products 1

SHDN

V

CC

RFIN

GND

(PADDLE)

OFFSET

COMP

DET

DET

10dB

10dB 10dB10dB

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.

MAX4000/MAX4001/MAX4002

2.5GHz 45dB RF-Detecting Controllers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VCC= 3V, SHDN = 1.8V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

PARAMETER

CONDITIONS MIN

UNITS

Supply Voltage V

CC

2.7 5.5 V

Supply Current I

CC

VCC = 5.5V 5.9 9.3 mA

Shutdown Supply Current I

CC

SHDN = 0.8V, VCC = 5.5V 13 30 µA

Shutdown Output Voltage V

OUT

SHDN = 0.8V 100 mV

Logic-High Threshold V

H

1.8 V

Logic-Low Threshold V

L

0.8 V

SHDN = 3V 5 20

SHDN Input Current I

SHDN

SHDN = 0 -0.8

µA

SET-POINT INPUT

Voltage Range (Note 2) V

SET

Corresponding to central 40dB

1.45 V

Input Resistance R

IN

30 MΩ

Slew Rate (Note 3) 16 V/µs

MAIN OUTPUT

High, I

SOURCE

= 10mA

Voltage Range V

OUT

Low, I

SINK

= 350µA

V

Output-Referred Noise From CLPF 8

nV/√Hz

Small-Signal Bandwidth BW From CLPF 20 MHz

Slew Rate

V/µs

(Voltages Referenced to GND)
V

CC

...........................................................................-0.3V to +6V

OUT, SET, SHDN, CLPF.............................-0.3V to (V

CC

+ 0.3V)

RFIN

MAX4000 ......................................................................+6dBm

MAX4001 ....................................................................+16dBm

MAX4002 ....................................................................+19dBm

Equivalent Voltage

MAX4000 ..................................................................0.45V

RMS

MAX4001 ....................................................................1.4V

RMS

MAX4002 ....................................................................2.0V

RMS

OUT Short Circuit to GND ..........................................Continuous

Continuous Power Dissipation (TA = +70°C)

8-Bump UCSP (derate 4.7mW/°C above +70°C).........379mW

8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering , 10s) ................................+300°C

SYMBOL

TYP MAX

-0.01

0.35

V

= 0.2V to 2.6V 8

OUT

2.65 2.75

0.15

MAX4000/MAX4001/MAX4002

2.5GHz 45dB RF-Detecting Controllers

_______________________________________________________________________________________ 3

Note 1: All devices are 100% production tested at TA= +25°C and are guaranteed by design for TA= -40°C to +85°C as specified.

All production AC testing is done at 100MHz.

Note 2: Typical value only, set-point input voltage range determined by logarithmic slope and logarithmic intercept.
Note 3: Set-point slew rate is the rate at which the reference level voltage, applied to the inverting input of the g

m

stage, responds to

a voltage step at the SET pin (see Figure 1).

Note 4: Typical min/max range for detector.
Note 5: MAX4000 internally AC-coupled.
Note 6: MAX4001/MAX4002 are internally resistive-coupled to V

CC

.

ELECTRICAL CHARACTERISTICS

(VCC= 3V, SHDN = 1.8V, fRF= 100MHz to 2.5GHz, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
(Note 1)

PARAMETER

CONDITIONS MIN TYP

UNITS

RF Input Frequency f

RF

100

MHz

MAX4000 -58 -13

MAX4001 -48 -3

RF Input Voltage Range
(Note 4)

V

RF

MAX4002 -43 +2

dBV

MAX4000 -45 0

MAX4001 -35 +10

Equivalent Power Range

(50Ω Terminated) (Note 4)

P

RF

MAX4002 -30 +15

dBm

f

RF

= 100MHz 22.5 25.5 28.5

f

RF

= 900MHz 25Logarithmic Slope V

S

f

RF

= 1900MHz 29

mV/dB

MAX4000 -62 -55 -49

MAX4001 -52 -45 -39fRF = 100MHz

MAX4002 -47 -40 -34

MAX4000 -57

MAX4001 -48

fRF = 900MHz

MAX4002 -43

MAX4000 -56

MAX4001 -45

Logarithmic Intercept P

X

fRF = 1900MHz

MAX4002 -41

dBm

RF INPUT INTERFACE

DC Resistance R

DC

MAX4001/MAX4002, connected to V

CC

(Note 5)

2kΩ

Inband Resistance R

IB

2kΩ

Inband Capacitance C

IB

MAX4000, internally AC-coupled
(Note 6)

0.5 pF

SYMBOL

MAX

2500

MAX4000/MAX4001/MAX4002

2.5GHz 45dB RF-Detecting Controllers

4 _______________________________________________________________________________________

Typical Operating Characteristics

(VCC= 3V, SHDN = VCC, TA= +25°C, unless otherwise specified. All log conformance plots are normalized to their respective tem­peratures.)

MAX4001 LOG CONFORMANCE

vs. INPUT POWER (μMAX)

MAX4000 toc08

INPUT POWER (dBm)

ERROR (dB)

100-30 -20 -10

-3

-2

-1

0

1

2

3

4

-4

-40 20

2.5GHz

1.9GHz

0.9GHz

0.1GHz

MAX4002 LOG CONFORMANCE

vs. INPUT POWER (μMAX)

MAX4000 toc09

INPUT POWER (dBm)

ERROR (dB)

155-25 -15 -5

-3

-2

-1

0

1

2

3

4

-4

-35 25

2.5GHz

1.9GHz

0.9GHz

0.1GHz

MAX4000 LOG CONFORMANCE

vs. INPUT POWER (μMAX)

MAX4000 toc07

INPUT POWER (dBm)

ERROR (dB)

0-10-40 -30 -20

-3

-2

-1

0

1

2

3

4

-4

-50 10

2.5GHz

1.9GHz

0.9GHz

0.1GHz

MAX4002

SET vs. INPUT POWER (UCSP)

MAX4000 toc06

INPUT POWER (dBm)

SET (V)

2010-10 0-20-30

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0

-40 30

2.5GHz

1.9GHz

0.9GHz

0.1GHz

MAX4001

SET vs. INPUT POWER (UCSP)

INPUT POWER (dBm)

SET (V)

100-20 -10-30-40

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0

-50 20

2.5GHz

1.9GHz

0.9GHz

0.1GHz

MAX4000 toc05

MAX4000

SET vs. INPUT POWER (UCSP)

MAX4000 toc04

INPUT POWER (dBm)

SET (V)

0-10-30 -20-40-50

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0

-60 10

2.5GHz

1.9GHz

0.9GHz

0.1GHz

MAX4002

SET vs. INPUT POWER (μMAX)

MAX4000 toc03

INPUT POWER (dBm)

SET (V)

2010-30 -20 -10 0

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-40 30

2.5GHz

1.9GHz

0.9GHz

0.1GHz

MAX4001

SET vs. INPUT POWER (μMAX)

MAX4000 toc02

INPUT POWER (dBm)

SET (V)

100-40 -30 -20 -10

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-50 20

2.5GHz

1.9GHz

0.9GHz

0.1GHz

MAX4000

SET vs. INPUT POWER (μMAX)

MAX4000 toc01

INPUT POWER (dBm)

SET (V)

0-10-50 -40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-60 10

2.5GHz

1.9GHz

0.9GHz

0.1GHz

MAX4000/MAX4001/MAX4002

2.5GHz 45dB RF-Detecting Controllers

_______________________________________________________________________________________ 5

Typical Operating Characteristics (continued)

(VCC= 3V, SHDN = VCC, TA= +25°C, unless otherwise specified. All log conformance plots are normalized to their respective tem­peratures.)

MAX4002 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.1GHz (UCSP)

MAX4000 toc18

INPUT POWER (dBm)

SET (V)

155-25 -15 -5

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-35 25

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

MAX4001 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.1GHz (UCSP)

MAX4000 toc17

INPUT POWER (dBm)

SET (V)

100-30 -20 -10

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-40 20

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

MAX4000 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.1GHz (UCSP)

MAX4000 toc16

INPUT POWER (dBm)

SET (V)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

MAX4002 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.1GHz (μMAX)

MAX4000 toc15

INPUT POWER (dBm)

SET (V)

ERROR (dB)

155-25 -15 -5

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-35 25

TA = +85°C

TA = +25°C

TA = -40°C

MAX4001 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.1GHz (μMAX)

MAX4000 toc14

INPUT POWER (dBm)

SET (V)

100-30 -20 -10

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-40 20

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

MAX4000 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.1GHz (μMAX)

MAX4000 toc13

INPUT POWER (dBm)

SET (V)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

MAX4002 LOG CONFORMANCE

vs. INPUT POWER (UCSP)

MAX4000 toc12

INPUT POWER (dBm)

ERROR (dB)

155-25 -15 -5

-3

-2

-1

0

1

2

3

4

-4

-35 25

2.5GHz

0.9GHz

0.1GHz

1.9GHz

MAX4001 LOG CONFORMANCE

vs. INPUT POWER (UCSP)

MAX4000 toc11

INPUT POWER (dBm)

ERROR (dB)

100-30 -20 -10

-3

-2

-1

0

1

2

3

4

-4

-40 20

2.5GHz

0.9GHz

0.1GHz

1.9GHz

MAX4000 LOG CONFORMANCE

vs. INPUT POWER (UCSP)

MAX4000 toc10

INPUT POWER (dBm)

ERROR (dB)

0-10-40 -30 -20

-3

-2

-1

0

1

2

3

4

-4

-50 10

2.5GHz

0.9GHz

0.1GHz

1.9GHz

MAX4000/MAX4001/MAX4002

2.5GHz 45dB RF-Detecting Controllers

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= 3V, SHDN = VCC, TA= +25°C, unless otherwise specified. All log conformance plots are normalized to their respective tem­peratures.)

MAX4002 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 1.9GHz (μMAX)

MAX4000 toc27

INPUT POWER (dBm)

SET (V)

ERROR (dB)

155-25 -15 -5

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-35 25

TA = +85°C

TA = +25°C

TA = -40°C

TA = +85°C

TA = +25°C

TA = -40°C

MAX4001 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 1.9GHz (μMAX)

MAX4000 toc26

INPUT POWER (dBm)

SET (V)

ERROR (dB)

100-30 -20 -10

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-40 20

TA = +85°C

TA = +25°C

TA = -40°C

TA = +85°C

TA = +25°C

TA = -40°C

MAX4000 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 1.9GHz (μMAX)

MAX4000 toc25

INPUT POWER (dBm)

SET (V)

ERROR (dB)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

TA = +85°C

TA = +25°C

TA = -40°C

MAX4002 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.9GHz (UCSP)

MAX4000 toc24

INPUT POWER (dBm)

SET (V)

155-25 -15 -5

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-35 25

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

MAX4001 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.9GHz (UCSP)

MAX4000 toc23

INPUT POWER (dBm)

SET (V)

100-30 -20 -10

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-40 20

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

MAX4000 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.9GHz (UCSP)

MAX4000 toc22

INPUT POWER (dBm)

SET (V)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

MAX4002 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.9GHz (μMAX)

MAX4000 toc21

INPUT POWER (dBm)

SET (V)

ERROR (dB)

155-25 -15 -5

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-35 25

TA = +85°C

TA = +25°C

TA = -40°C

MAX4001 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.9GHz (μMAX)

MAX4000 toc20

INPUT POWER (dBm)

SET (V)

ERROR (dB)

100-30 -20 -10

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-40 20

TA = +85°C

TA = +25°C

TA = -40°C

MAX4000 SET AND LOG CONFORMANCE

vs. INPUT POWER AT 0.9GHz (μMAX)

MAX4000 toc19

INPUT POWER (dBm)

SET (V)

ERROR (dB)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C