MAX3518ETP+

MAX3518ETP+ Datasheet

MAX3518

Part	Datasheet
MAX3518ETP+	MAX3518ETP+ (pdf)

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PDF Datasheet Preview
DOCSIS Upstream Amplifier MAX3518 The MAX3518 is an integrated CATV upstream amplifier IC designed to meet the DOCSIS requirements, while disspating only 1.25W. The amplifier covers a 5MHz to 85MHz input frequency range 275MHz, 3dB bandwidth , and is capable of transmitting four QPSK modulated carriers, each at +58dBmV, simultaneously within this range. Both input and output ports are differential, requiring that an external balun be used at the output port. The gain is controlled in 1dB steps over a 63dB range using a SPI 3-wire interface. The MAX3518 operates from a single +5V supply. Four power codes are provided to allow maximum supply current to be reduced as determined by distortion requirements. In addition, for each power code, supply current is automatically reduced as gain is reduced while maintaining distortion performance. For DOCSIS applications, the MAX3518 draws 300mA at 33dB gain, dropping to 250mA at 31dB gain. The MAX3518 supply current drops to 5mA between bursts to minimize power dissipation in transmit-disable mode. Control logic levels are 3.3V CMOS. The MAX3518 is available in a 20-pin thin QFN package, and operates over the extended industrial temperature range -40°C to +85°C . DOCSIS Cable Modems VOIP Modems Set-Top Boxes +5V Supply Voltage Low Power 1.25W at 31dB Gain, 64dBmV Output Ultra-Low 25mW Dissipation in Transmit-Disable Mode 63dB Gain Control Range in 1dB Steps -60dBc Harmonic Distortion at 64dBmV Output Small 5mm x 5mm Thin QFN Package Low Burst On/Off Transient 275MHz, 3dB Bandwidth Information PART TEMP RANGE PIN PACKAGE MAX3518ETP+ -40°C to +85°C 20 TQFN-EP* +Denotes a lead Pb -free/RoHS-compliant package. EP = Exposed pad. Typical Application Circuit appears at end of data sheet. SPI is a trademark of Motorola, Inc. N.C. 20 GND 1 Configuration/Functional Diagram N.C. N.C. N.C. 15 N.C. IN+ 2 MAX3518 14 OUT+ IN- 3 13 N.C. N.C. 4 GND 5 SERIAL INTERFACE 12 OUT11 N.C.* NOTE N.C.* PINS MUST BE LEFT UNCONNECTED. SCLK TXEN Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at DOCSIS Upstream Amplifier MAX3518 ABSOLUTE MAXIMUM RATINGS VCC to +5.5V IN+, -0.3V to VCC + 0.3V OUT+, -0.3V to VCC + 3.6V TXEN, SDA, SCLK, CS to +4.2V RF Input +10dBm Continuous Power Dissipation TA = +70°C Note 1 derate 29mW/°C above TA = +70°C .......................2000mW Operating Temperature Range.......................... -40°C to +85°C Junction Storage Temperature Range............................ -65°C to +165°C Lead Temperature soldering, Note 1 Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to 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. CAUTION! ESD SENSITIVE DEVICE DC ELECTRICAL CHARACTERISTICS Typical Application Circuit as shown, VCC = 4.75V to 5.25V, VGND = 0, TXEN = high, TA = -40°C to +85°C, unless otherwise specified. Typical values are at VCC = 5V, TA = +25°C. Note 2 PARAMETER CONDITIONS Supply Voltage Gain code = 63, power code = 3 33dB gain typ Supply Current Transmit Mode Gain code = 59, power code = 1 29dB gain typ MIN TYP MAX UNITS 290 315 mA Supply Current Transmit Disable Mode ICC TXEN = low Input High Voltage Input Low Voltage Input High Current Input Low Current VINH VINL IBIASH AC ELECTRICAL CHARACTERISTICS Typical Application Circuit as shown, VCC = 4.75V to 5.25V, VGND = 0, TXEN = high, TA = -40°C to +85°C, unless otherwise specified. Typical values are at VCC = 5V, TA = +25°C. Note 2 PARAMETER Frequency Range Voltage Gain, ZIN = 200Ω, ZOUT = 75Ω, Power Code = 3 Note 4 SYMBOL fIN Note 3 Gain code = 63 Gain code = 53 Gain code = 43 AV Gain code = 33 Gain code = 23 Gain code = 13 Gain code = 03 CONDITIONS MIN TYP MAX UNITS 85 MHz -18 -17 -16 -28 -27 -26 Voltage Gain Variation with Power Code, Any Gain Code Gain Rolloff Voltage gain = -28dB to +33dB, fIN = 5MHz to 85MHz Gain Step Size

PDF Datasheet Preview

DOCSIS Upstream Amplifier

MAX3518

The MAX3518 is an integrated CATV upstream amplifier IC designed to meet the DOCSIS requirements, while disspating only 1.25W. The amplifier covers a 5MHz to 85MHz input frequency range 275MHz, 3dB bandwidth , and is capable of transmitting four QPSK modulated carriers, each at +58dBmV, simultaneously within this range. Both input and output ports are differential, requiring that an external balun be used at the output port. The gain is controlled in 1dB steps over a 63dB range using a SPI 3-wire interface.

The MAX3518 operates from a single +5V supply. Four power codes are provided to allow maximum supply current to be reduced as determined by distortion requirements. In addition, for each power code, supply current is automatically reduced as gain is reduced while maintaining distortion performance. For DOCSIS applications, the MAX3518 draws 300mA at 33dB gain, dropping to 250mA at 31dB gain. The MAX3518 supply current drops to 5mA between bursts to minimize power dissipation in transmit-disable mode. Control logic levels are 3.3V CMOS.

The MAX3518 is available in a 20-pin thin QFN package, and operates over the extended industrial temperature range -40°C to +85°C .

DOCSIS Cable Modems VOIP Modems Set-Top Boxes
+5V Supply Voltage Low Power 1.25W at 31dB Gain, 64dBmV Output Ultra-Low 25mW Dissipation in Transmit-Disable

Mode 63dB Gain Control Range in 1dB Steps -60dBc Harmonic Distortion at 64dBmV Output Small 5mm x 5mm Thin QFN Package Low Burst On/Off Transient 275MHz, 3dB Bandwidth

Information

PART

TEMP RANGE

PIN PACKAGE

MAX3518ETP+ -40°C to +85°C 20 TQFN-EP*
+Denotes a lead Pb -free/RoHS-compliant package.
*EP = Exposed pad.

Typical Application Circuit appears at end of data sheet.

SPI is a trademark of Motorola, Inc.

N.C. 20

GND 1

Configuration/Functional Diagram

N.C.

N.C.

N.C.
15 N.C.

IN+ 2

MAX3518
14 OUT+

IN- 3
13 N.C.

N.C.* 4 GND 5

SERIAL INTERFACE
12 OUT11 N.C.*

NOTE N.C.* PINS MUST BE LEFT UNCONNECTED.

SCLK

TXEN

Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at

DOCSIS Upstream Amplifier

MAX3518

ABSOLUTE MAXIMUM RATINGS

VCC to +5.5V IN+, -0.3V to VCC + 0.3V OUT+, -0.3V to VCC + 3.6V TXEN, SDA, SCLK, CS to +4.2V RF Input +10dBm

Continuous Power Dissipation TA = +70°C Note 1 derate 29mW/°C above TA = +70°C .......................2000mW

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

Junction

Storage Temperature Range............................ -65°C to +165°C

Lead Temperature soldering,

Note 1 Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to

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.

CAUTION! ESD SENSITIVE DEVICE

DC ELECTRICAL CHARACTERISTICS

Typical Application Circuit as shown, VCC = 4.75V to 5.25V, VGND = 0, TXEN = high, TA = -40°C to +85°C, unless otherwise specified. Typical values are at VCC = 5V, TA = +25°C. Note 2

PARAMETER

CONDITIONS

Supply Voltage

Gain code = 63, power code = 3 33dB gain typ

Supply Current Transmit Mode

Gain code = 59, power code = 1 29dB gain typ

MIN TYP MAX UNITS
290 315 mA

Supply Current Transmit Disable Mode

ICC TXEN = low

Input High Voltage Input Low Voltage Input High Current Input Low Current

VINH VINL IBIASH

AC ELECTRICAL CHARACTERISTICS

Typical Application Circuit as shown, VCC = 4.75V to 5.25V, VGND = 0, TXEN = high, TA = -40°C to +85°C, unless otherwise specified. Typical values are at VCC = 5V, TA = +25°C. Note 2

PARAMETER Frequency Range

Voltage Gain, ZIN = 200Ω, ZOUT = 75Ω, Power Code = 3 Note 4

SYMBOL fIN Note 3 Gain code = 63 Gain code = 53 Gain code = 43 AV Gain code = 33 Gain code = 23 Gain code = 13 Gain code = 03

CONDITIONS

MIN TYP MAX UNITS
85 MHz
-18 -17 -16
-28 -27 -26

Voltage Gain Variation with Power Code, Any Gain Code

Gain Rolloff

Voltage gain = -28dB to +33dB, fIN = 5MHz to 85MHz

Gain Step Size

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Datasheet ID: MAX3518ETP+ 647301