max9987etpt Maxim Integrated Products, Inc., max9987etpt Datasheet

max9987etpt

Manufacturer Part Number

max9987etpt

Description

+14dbm To +20dbm Lo Buffers/splitters With ?1db Variation

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.MAX9987ETPT.pdf (12 pages)

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The MAX9987 and MAX9988 LO buffers/splitters each

integrate a passive two-way power splitter with high-

isolation input and output buffer amplifiers. These

buffers are designed to provide the high output

(+14dBm to +20dBm) necessary to drive the LO inputs

of high-linearity passive mixers, while offering 40dB

reverse isolation to prevent LO pulling. The MAX9987 is

internally matched for the cellular/GSM bands, and the

MAX9988 is matched for the DCS/PCS/UMTS bands.

The typical application circuit provides a nominal

+17dBm output power with ±1dB variation over supply,

temperature, and input power. With two optional resis-

tors, the output power can be precision set from

+14dBm to +20dBm. The devices offer more than 30dB

output-to-output port isolation, and are offered in 5mm

5mm 20-pin thin QFN packages with exposed paddle.

19-2416; Rev 2; 3/04

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.

Cellular/GSM/DCS/PCS/UMTS Base Station

Tx/Rx LO Drive

Base Station Main and Diversity Channels

Coherent Receivers

ISM Wireless LAN

Wireless Local Loop

Local Multipoint Distribution Service

Point-to-Point Systems

PRESCALER

________________________________________________________________ Maxim Integrated Products

RF LO

+14dBm to +20dBm LO Buffers/Splitters

TO PLL

General Description

(+3dBm)

(+7dBm)

OUTPLL

Applications

BIASIN

CONTROL

NETWORK

PLL BUFFER

BIAS

Typical Operating Circuit and Block Diagram

INPUT AMP

BIASOUT

PASSIVE TWO-WAY

POWER SPLITTER

MAX9987

MAX9988

*EP = Exposed paddle.

MAX9987ETP-T -40 C to 85 C

MAX9988ETP-T -40 C to 85 C

±1dB Output Power Variation

+14dBm to +20dBm Adjustable Output Power

Two-Way Power Splitting

40dB Reverse Isolation

More than 30dB Output-to-Output Isolation

Low Output Noise: -170dBc/Hz at +17dBm

160mA Supply Current at +17dBm

Isolated PLL Output (+3dBm)

OUTPUT AMP

PART

(1)

(2)

with ±1dB Variation

OUT1

(+17dBm)

OUT2

(+17dBm)

RANGE

TEMP

Ordering Information

RF INPUT

(1)

(2)

PIN-

PACKAGE

QFN-EP*

20 Thin

IF OUTPUT

(1)

IF OUTPUT

(2)

Features

FREQUENCY

1500MHz to

700MHz to

1100MHz

2200MHz

RANGE

Related parts for max9987etpt

max9987etpt Summary of contents

Page 1

Rev 2; 3/04 +14dBm to +20dBm LO Buffers/Splitters General Description The MAX9987 and MAX9988 LO buffers/splitters each integrate a passive two-way power splitter with high- isolation input and output buffer amplifiers. These buffers are designed to provide the high ...

Page 2

LO Buffers/Splitters with ±1dB Variation ABSOLUTE MAXIMUM RATINGS VCC1, VCC2, VCC3, VCCREF to GND.................................................-0.3V to +6. GND ...................................................-0. OUT1, OUT2, OUTPLL to GND ......................................-0. REF to GND ......................................................Source/Sink 5mA INBIAS, OUTBIAS, ...

Page 3

LO Buffers/Splitters AC ELECTRICAL CHARACTERISTICS—MAX9987 (Typical Application Circuit 4.75V to 5.25V, 50Ω environment, +4dBm < -40°C to +85°C, unless otherwise noted. Typical specifications are for +25°C, unless ...

Page 4

LO Buffers/Splitters with ±1dB Variation AC ELECTRICAL CHARACTERISTICS—MAX9988 (Typical Application Circuit 4.75V to 5.25V, 50Ω environment, +6dBm < -40°C to +85°C, unless otherwise noted. Typical specifications are for ...

Page 5

LO Buffers/Splitters (V = 5.0V, nominal bias 900MHz guaranteed operating range, and are provided for reference only.) SUPPLY CURRENT vs. OUTPUT POWER OUTMAIN 180 175 170 T = +25°C AND +85°C 165 ...

Page 6

LO Buffers/Splitters with ±1dB Variation (V = 5.0V, nominal bias 900MHz guaranteed operating range, and are provided for reference only.) SUPPLY CURRENT vs. SUPPLY VOLTAGE 170 165 160 PLL BIASED 155 150 ...

Page 7

LO Buffers/Splitters (V = 5.0V, nominal bias 1800MHz guaranteed operating range, and are provided for reference only.) SUPPLY CURRENT vs. OUTPUT POWER 180 175 T = +85°C A 170 165 160 T ...

Page 8

LO Buffers/Splitters with ±1dB Variation (V = 5.0V, nominal bias 1800MHz guaranteed operating range, and are provided for reference only.) SUPPLY CURRENT vs. SUPPLY VOLTAGE 180 175 170 PLL BIASED 165 160 ...

Page 9

LO Buffers/Splitters PIN NAME 13, GND Ground 17, 18 Input. Internally matched 50 RF input. AC couple to this pin. Supply. Supply connection for on-chip voltage and current references. See ...

Page 10

LO Buffers/Splitters with ±1dB Variation Table 1. External Resistor Values for +14dBm to +20dBm Output Power NOMINAL OUTPUT POWER (dBm) +20 1.35k +19 2.2k +18 5.0k +17 Open +16 Open +15 Open +14 ...

Page 11

LO Buffers/Splitters 5.0V 5. 100Ω OUT TO PLL (+3dBm) C14 GND INPUT FROM VCCREF 5. GND REF * FOR THESE VALUES, SEE TABLE 1. FOR CAPACITOR VALUES, SEE ...

Page 12

LO Buffers/Splitters with ±1dB Variation (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry ...

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