Datasheet

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General Description

The MAX4361/MAX4362/MAX4363 are a family of high-

performance ADSL drivers and drivers/receivers ideal

for the upstream transmit path and the downstream

receive path of customer premise equipment. These

devices operate from a single 5V supply and deliver up

to 12.5dBm average line power for DMT modulated sig-

nals, meeting the requirements of full-rate ADSL.

Spurious-free dynamic range (SFDR) at full output

power is typically -75dBC at 100kHz.

The MAX4361 is a differential IN/differential OUT driver

with a fixed gain of 3.1V/V. The MAX4362 is a dual

amplifier with shutdown intended for use as a differen-

tial IN/differential OUT driver with gain set with external

resistors. The MAX4363 is a quad amplifier with shut-

down intended for use as a differential IN/differential

OUT driver/receiver combination with gain set with

external resistors.

The MAX4361 is offered in a space-saving 8-pin µMAX

package.

Applications

ADSL Line Interface

HDSL Line Driver

Features

♦ Low-Noise Driver

4.8nV/√Hz Voltage-Noise Density

1.5pA/√Hz Current-Noise Density

♦ Full-Rate ADSL ATU-R Line Drivers and Receivers

♦ Single 5V Supply

♦ -75dBc SFDR at Full Output Power at 100kHz

♦ -95dB Driver-to-Receiver Crosstalk (MAX4363)

♦ +12.5dBm Average Line Power (DMT)

♦ 280mA (min) Peak Output Current

♦ Rail-to-Rail

Output Swing

♦ Thermal and Short-Circuit Protection

MAX4361/MAX4362/MAX4363

ADSL Drivers/Receivers for Customer Premise

Equipment

________________________________________________________________ Maxim Integrated Products 1

GND

T1OUT

V+

T2OUTT2IN-

SHDN

T1IN-

T1IN+

µMAX

GNDT2IN+

27V+IN+

1 8 OUT+GND

µMAX/SO

TOP VIEW

V+IN- 3 6

OUT-GND

MAX4361 MAX4362

MAX4362

MAX4363

114V+SHDN

123 T1OUTT1IN-

132 GNDT1IN+

141 N.C.N.C.

87 N.C.N.C.

GND

T2IN+

105 T2OUTT2IN-

GND (TX)

T1OUT

V+ (TX)

T2OUTT2IN-

SHDN

T1IN-

T1IN+

GND (TX)

N.C.

V+ (RX)

GND (RX)R1IN-

R1IN+

GND

T2IN+

R1OUT

R2OUTR2IN+

R2IN-

SO/TSSOP

Pin Configurations

Ordering Information

19-2299; Rev 0; 1/02

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE PIN-PACKAGE

MAX4361EUA -40°C to +85°C 8 µMAX

MAX4361ESA -40°C to +85°C 8 SO

MAX4362EUB -40°C to +85°C 10 µMAX

MAX4362ESD -40°C to +85°C 14 SO

MAX4363EUP -40°C to +85°C 20 TSSOP

MAX4363ESP -40°C to +85°C 20 SO

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Summary of content (13 pages)

PAGE 1
9-2299; Rev 0; 1/02 ADSL Drivers/Receivers for Customer Premise Equipment Features ♦ Low-Noise Driver 4.8nV/√Hz Voltage-Noise Density 1.5pA/√Hz Current-Noise Density ♦ Full-Rate ADSL ATU-R Line Drivers and Receivers ♦ Single 5V Supply ♦ -75dBc SFDR at Full Output Power at 100kHz ♦ -95dB Driver-to-Receiver Crosstalk (MAX4363) The MAX4361 is a differential IN/differential OUT driver with a fixed gain of 3.1V/V.
PAGE 2
MAX4361/MAX4362/MAX4363 ADSL Drivers/Receivers for Customer Premise Equipment ABSOLUTE MAXIMUM RATINGS Supply Voltage (V+ to GND) ....................................-0.3V to +6V Analog Input Voltage .......................(GND - 0.3V) to (V+ + 0.3V) SHDN Input Voltage.........................(GND - 0.3V) to (V+ + 0.3V) Output Short-Circuit Duration .................................................10s Driver Output Current...............................................................
PAGE 3
ADSL Drivers/Receivers for Customer Premise Equipment (V+ = 5V, GND = 0, VCM = 2.5V, RL = 12.5Ω, SHDN = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values specified at TA = +25°C.) PARAMETER SYMBOL Input Common-Mode Voltage Range VCM CONDITIONS Inferred from CMRR test Common-Mode Rejection Ratio CMRR 1.25V ≤ VCM ≤ 4.5V Power-Supply Rejection Ratio PSRR V+ = 4.5V to 5.
PAGE 4
MAX4361/MAX4362/MAX4363 ADSL Drivers/Receivers for Customer Premise Equipment ELECTRICAL CHARACTERISTICS—Receiver (MAX4363 only) (V+ = 5V, GND = 0, VCM = 2.5V, RL = ∞, SHDN = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values specified at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN MAX UNITS SFDR Gain-Bandwidth Product GBW Open-Loop Gain AVOL 1.5V ≤ VOUT ≤ 3.5V Peak Output Current IOUT RL = 50Ω, inferred from Output-Voltage Swing test Input Offset Voltage VOS ±0.5 ±10 IB -0.
PAGE 5
ADSL Drivers/Receivers for Customer Premise Equipment DRIVER DIFFERENTIAL DISTORTION vs. PEAK-TO-PEAK OUTPUT VOLTAGE -60 2ND HARMONIC -70 3RD HARMONIC -80 -90 100k 10k 3RD HARMONIC -70 -80 2ND HARMONIC -90 3RD HARMONIC -80 2ND HARMONIC -90 3 4 5 6 7 8 5 25 45 65 85 PEAK-TO-PEAK OUTPUT VOLTAGE (V) RLOAD (Ω) DRIVER LINE POWER vs. TURNS RATIO DRIVER CURRENT AND VOLTAGE NOISE vs. FREQUENCY DRIVER OUTPUT IMPEDANCE vs. FREQUENCY 13.5 13.0 12.5 12.0 V+ = 4.5V 11.5 11.0 10.5 10.
PAGE 6
Typical Operating Characteristics (continued) (V+ = 5V, GND = 0, VCM = 2.5V, RL = 12.5Ω, SHDN = 0, TA = +25°C.) -60 2ND HARMONIC -70 3RD HARMONIC -90 60 -100 VNOISE 10 1 10 1 INOISE 0.1 1M 100k 1k 10k 0 20 -30 -60 10 0 -120 -20 -150 -30 -180 10k 1M 100k -20 -30 -40 -50 -20 -40 -60 RL = 12.5Ω -80 10M 100M 1G RECEIVER-TO-RECEIVER CROSSTALK vs. FREQUENCY 0 CROSSTALK (dB) -10 1M FREQUENCY (Hz) 0 MAX4361 toc14 G=1 -90 PHASE -10 DRIVER-TO-RECEIVER CROSSTALK vs.
PAGE 7
ADSL Drivers/Receivers for Customer Premise Equipment MAX4361 PIN NAME 1, 4 GND Ground FUNCTION 2 IN+ First Driver Input 3 IN- Second Driver Input 5 OUT- 6, 7 V+ 8 OUT+ Second Driver Output Positive Power-Supply Voltage. Bypass V+ to GND with a 0.1µF capacitor. First Driver Output MAX4362 PIN NAME FUNCTION µMAX SO 1 2 T1IN+ First Driver Noninverting Input 2 3 T1IN- First Driver Inverting Input 3 4 SHDN Shutdown. Connect to GND for normal operation.
PAGE 8
MAX4361/MAX4362/MAX4363 ADSL Drivers/Receivers for Customer Premise Equipment Pin Descriptions (continued) MAX4363 PIN NAME 1 T1IN+ First Driver Noninverting Input 2 T1IN- First Driver Inverting Input 3 SHDN Shutdown. Connect to GND for normal operation.
PAGE 9
ADSL Drivers/Receivers for Customer Premise Equipment 500Ω 1kΩ Power Supply and Decoupling The MAX4361/MAX4362/MAX4363 should be powered from a well-regulated, low-noise, 4.5V to 5.5V supply in order to optimize the ADSL upstream drive capability to +12.5dBm and maintain the best SFDR. High-quality capacitors with low equivalent series resistance (ESR) such as multilayer ceramic capacitors (MLCCs) should be used to minimize supply voltage ripple and power dissipation.
PAGE 10
Circuit). If the output current is large compared to the quiescent current, computing the dissipation in the output devices and adding it to the quiescent power dissipation will give a close approximation of the total power dissipation in the package. For a 12.5dBm average line power on a 100Ω line, the RMS current is 13.4mA. With a one-to-four transformer the driver therefore supplies 53.6mA RMS. It can be shown for a DMT signal the ratio of RMS current to the average rectified current is 0.8.
PAGE 11
ADSL Drivers/Receivers for Customer Premise Equipment 5V 0.1µF 5V 1kΩ 2.7kΩ 1kΩ 0.1µF 2.7kΩ 10kΩ VCC 3.125Ω 0.047µF IN1+ OUT+ IN10.047µF 10kΩ 1kΩ DRIVER LINE IMPEDANCE IN2- 3.125Ω 100Ω OUT- IN2+ 1:4 TRANSFORMER ADSL CHIPSET 500Ω 1kΩ MAX4363 1kΩ 5V 500Ω OUT+ IN1IN1+ IN2+ OUT- RECEIVER IN25V 10kΩ GND 1kΩ 0.
PAGE 12
ADSL Drivers/Receivers for Customer Premise Equipment 10LUMAX.EPS 8LUMAXD.
PAGE 13
ADSL Drivers/Receivers for Customer Premise Equipment SOICN.EPS Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.