lt5527euf-trpbf Linear Technology Corporation, lt5527euf-trpbf Datasheet

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lt5527euf-trpbf

Manufacturer Part Number
lt5527euf-trpbf
Description
400mhz To 3.7ghz High Signal Level Downconverting Mixer
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
50
Wide RF Frequency Range: 400MHz to 3.7GHz*
High Input IP3:
Conversion Gain: 3.2dB at 900MHz
Integrated LO Buffer: Low LO Drive Level
High LO-RF and LO-IF Isolation
Low Noise Figure: 11.6dB at 900MHz
Very Few External Components
Enable Function
4.5V to 5.25V Supply Voltage Range
16-Lead (4mm × 4mm) QFN Package
Cellular, WCDMA, TD-SCDMA and UMTS
Infrastructure
GSM900/GSM1800/GSM1900 Infrastructure
900MHz/2.4GHz/3.5GHz WLAN
MMDS, WiMAX
High Linearity Downmixer Applications
High Signal Level Downmixer for Multi-Carrier Wireless Infrastructure
INPUT
RF
Single-Ended RF and LO Ports
RF
LT5527
GND
–3dBm (TYP)
LO INPUT
U
BIAS
EN
24.5dBm at 900MHz
23.5dBm at 1900MHz
2.3dB at 1900MHz
12.5dB at 1900MHz
V
CC2
V
1nF
CC1
U
IF
IF
+
220nH
100nH
100nH
1µF
4.7pF
4.7pF
5527 TA01a
5V
1nF
IF
OUTPUT
240MHz
DESCRIPTIO
The LT
wide dynamic range downconverter applications. The IC
includes a high speed differential LO buffer amplifier
driving a double-balanced mixer. Broadband, integrated
transformers on the RF and LO inputs provide single-
ended 50Ω interfaces. The differential IF output allows
convenient interfacing to differential IF filters and amplifi-
ers, or is easily matched to drive 50Ω single-ended, with
or without an external transformer.
The RF input is internally matched to 50Ω from 1.7GHz to
3GHz, and the LO input is internally matched to 50Ω from
1.2GHz to 5GHz. The frequency range of both ports is
easily extended with simple external matching. The IF
output is partially matched and usable for IF frequencies
up to 600MHz.
The LT5527’s high level of integration minimizes the total
solution cost, board space and system-level variation.
*Operation over a wider frequency range is possible with reduced performance. Consult factory for
information and assistance.
All other trademarks are the property of their respective owners.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
5527 active mixer is optimized for high linearity,
Downconverting Mixer
1.9GHz Conversion Gain, IIP3, SSB NF and
16
14
24
22
20
18
12
10
8
6
4
2
–9
IIP3
SSB NF
G
400MHz to 3.7GHz
C
U
LO-RF Leakage vs LO Power
High Signal Level
–7
LO POWER (dBm)
–5
–3
–1
IF = 240MHz
LOW SIDE LO
T
V
A
CC
= 25°C
= 5V
1
LO-RF
5527 TA01b
LT5527
3
–60
–65
–20
–25
–30
–35
–40
–45
–50
–55
–70
–75
1
5527f

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lt5527euf-trpbf Summary of contents

Page 1

... The LT5527’s high level of integration minimizes the total solution cost, board space and system-level variation. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. *Operation over a wider frequency range is possible with reduced performance. Consult factory for information and assistance ...

Page 2

... With External Matching Requires Appropriate IF Matching Z = 50Ω, 1700MHz to 3000MHz 50Ω, 1200MHz to 3400MHz O Differential at 240MHz 1200MHz to 3500MHz 380MHz to 1200MHz U W TOP VIEW ORDER PART NUMBER GND LT5527EUF + – GND PART MARKING UF PACKAGE 5527 = 125° ...

Page 3

AC ELECTRICAL CHARACTERISTICS = – 5dBm (–5dBm/tone for 2-tone IIP3 tests, ∆f = 1MHz output measured at 240MHz, unless otherwise noted. Test circuit shown in Figure 1. (Notes PARAMETER Conversion Gain Conversion Gain ...

Page 4

LT5527 W U TYPICAL AC PERFOR A CE CHARACTERISTICS = –5dBm (–5dBm/tone for 2-tone IIP3 tests, ∆f = 1MHz 5V High unless otherwise noted. Test circuit shown in Figure 1. Conversion Gain, ...

Page 5

W U TYPICAL AC PERFOR A CE CHARACTERISTICS = –5dBm (–5dBm/tone for 2-tone IIP3 tests, ∆f = 1MHz 5V High unless otherwise noted. Test circuit shown in Figure 1. IF Output Power, ...

Page 6

LT5527 W U TYPICAL AC PERFOR A CE CHARACTERISTICS RF/LO matching 5V High 140MHz, unless otherwise noted. Test circuit shown in Figure 1. Conversion Gain, IIP3 and Frequency (900MHz Low Side ...

Page 7

CTIO S NC (Pins 13, 14, 16): Not Connected Internally. These pins should be grounded on the circuit board for improved LO-to-RF and LO-to-IF isolation. RF (Pin 3): Single-Ended Input for ...

Page 8

LT5527 TEST CIRCUITS LO IN EXTERNAL MATCHING FOR LOW FREQUENCY LO ONLY RF IN EXTERNAL MATCHING FOR LOW BAND OR HIGH BAND ONLY APPLICATION LO MATCH 450MHz High Side 6.8nH 10pF 900MHz Low Side 3.9nH 5.6pF ...

Page 9

U U APPLICATIO S I FOR ATIO Introduction The LT5527 consists of a high linearity double-balanced mixer, RF buffer amplifier, high speed limiting LO buffer amplifier and bias/enable circuits. The RF and LO inputs are both single ended. The IF ...

Page 10

LT5527 U U APPLICATIO S I FOR ATIO at 4.5mm. This series transmission line/shunt capacitor matching topology allows the LT5527 to be used for mul- tiple frequency standards without circuit board layout modifications. The series transmission line can also be ...

Page 11

U U APPLICATIO S I FOR ATIO 0dBm LO drive is recommended for optimum noise figure, although –3dBm will still deliver good conversion gain and linearity. Custom matching networks can be designed using the port impedance data listed in Table ...

Page 12

LT5527 U U APPLICATIO S I FOR ATIO Direct 8:1 IF Transformer Matching For IF frequencies below 100MHz, the simplest IF match- ing technique is an 8:1 transformer connected across the IF pins. The transformer will perform impedance transfor- mation ...

Page 13

U U APPLICATIO S I FOR ATIO R • OUT ω ω • R • OUT ...

Page 14

LT5527 U U APPLICATIO S I FOR ATIO through matching inductors in a band-pass IF matching network. The values of L1, L2 and C3 are calculated to resonate at the desired IF frequency with a quality factor that satisfies the ...

Page 15

... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 16-Lead Plastic QFN (4mm × ...

Page 16

... Response Time, Comparator Reference Input, Latch Enable Input, –26dBm to +12dBm Input Range 17MHz Baseband Bandwidth, 40MHz to 500MHz IF, 1.8V to 5.25V Supply, –7dB to 56dB Linear Power Gain 500MHz BW S/H, 71.8dB SNR 500MHz BW S/H, 75.5dB SNR www.linear.com ● = 28mA CC = 28mA, CC 5527f LT/TP 0305 500 • PRINTED IN THE USA © LINEAR TECHNOLOGY CORPORATION 2005 ...

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