LT5521EUF Linear Technology, LT5521EUF Datasheet

IC MIXER HI LIN 3.7GHZ 16-QFN

LT5521EUF

Manufacturer Part Number
LT5521EUF
Description
IC MIXER HI LIN 3.7GHZ 16-QFN
Manufacturer
Linear Technology
Series
LT5521r
Datasheet

Specifications of LT5521EUF

Rf Type
Cellular, PHS, UMTS, WCDMA
Frequency
10MHz ~ 3.7GHz
Number Of Mixers
1
Gain
-0.5dB
Noise Figure
12.5dB
Secondary Attributes
Up Converter
Current - Supply
98mA
Voltage - Supply
3.15 V ~ 5.25 V
Package / Case
16-WQFN Exposed Pad
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT5521EUF
Manufacturer:
LT
Quantity:
10 000
Part Number:
LT5521EUF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT5521EUF#PBF
Manufacturer:
LT
Quantity:
20
Part Number:
LT5521EUF#PBF
Manufacturer:
LT/凌特
Quantity:
20 000
Part Number:
LT5521EUF#TRPBF
Manufacturer:
MAXIM
Quantity:
10
Part Number:
LT5521EUF#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
INPUT
IF
Wideband Output Frequency Range to 3.7GHz
+24.2dBm IIP3 at 1.95GHz RF Output
Low LO Leakage: –42dBm
Integrated LO Buffer: Low LO Drive Level
Single-Ended LO Drive
Wide Single Supply Range: 3.15V to 5.25V
Double-Balanced Active Mixer
Shutdown Function
16-Lead (4mm 4mm) QFN Package
Cellular, W-CDMA, PHS and UMTS Infrastructure
Cable Downlink Infrastructure
Wireless Infrastructure
Fixed Wireless Access Equipment
High Linearity Mixer Applications
BPF
10pF
1nF
1nF
1:1
U
6.8pF
110
110
IN
IN
+
BIAS
U
EN
LO INPUT
–5dBm
V
CC
LO
V
6.8pF
CC
OUT
OUT
V
GND
CC
+
5521 TA01
2.7nH
2.7nH
1 F
1nF
5V DC
4:1
DESCRIPTIO
The LT
low distortion and low LO leakage applications. The chip
includes a high speed LO buffer with single-ended input
and a double-balanced active mixer. The LT5521 requires
only –5dBm LO input power to achieve excellent distor-
tion and noise performance, while reducing external drive
circuit requirements. The LO buffer is internally 50
matched for wideband operation.
With a 250MHz input, a 1.7GHz LO and a 1.95GHz output
frequency, the mixer has a typical IIP3 of +24.2dBm,
–0.5dB conversion gain and a 12.5dB noise figure.
The LT5521 offers exceptional LO-RF isolation, greatly
reducing the need for output filtering to meet LO suppres-
sion requirements.
The device is designed to work over a supply voltage range
from 3.15V to 5.25V.
82pF
82pF
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
BPF
5521 is a very high linearity mixer optimized for
PA
RF
OUTPUT
U
Very High Linearity
–100
–20
–40
–60
–80
20
0
–14
Active Mixer
Intermodulation Distortion
–12
Fundamental, 3rd Order
–10
vs Input Power
–8
–6
P
IN
–4
(dBm)
IM3
LT5521
P
FUND
–2
f
f
f
P
T
0
IF
LO
RF
A
LO
= 250MHz
= 25 C
= 1.95GHz
= 1.7GHz
= –5dBm
2
5521 TA02
1
5521f
4
6

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LT5521EUF Summary of contents

Page 1

... The LT5521 offers exceptional LO-RF isolation, greatly reducing the need for output filtering to meet LO suppres- sion requirements. The device is designed to work over a supply voltage range from 3.15V to 5.25V. , LTC and LT are registered trademarks of Linear Technology Corporation. LO INPUT –5dBm 6.8pF LO GND ...

Page 2

... EN = 0.2V Internally Biased V = 5V, Internally Biased 3.3V, Internally Biased 5V 2.9V CONDITIONS 1700MHz O LO Requires Matching Requires Matching U W INFORMATION ORDER PART TOP VIEW NUMBER LT5521EUF + 1 12 OUT 2 11 GND GND – OUT PART MARKING UF PACKAGE 5521 4mm) PLASTIC QFN = 125 C unless otherwise noted ...

Page 3

AC ELECTRICAL CHARACTERISTICS P = –5dBm 1950MHz Test circuit shown in Figure PARAMETER Conversion Gain Conversion Gain Variation vs Temperature Input P1dB Single-Side Band Noise Figure IIP3 IIP2 (Note 6) ...

Page 4

LT5521 W U TYPICAL DC PERFOR A CE CHARACTERISTICS Supply Current vs Supply Voltage (5V Application) 100 4.7 4.8 4.9 5 TYPICAL AC PERFOR ...

Page 5

W U TYPICAL AC PERFOR A CE CHARACTERISTICS P = –5dBm 5V 2.9V unless otherwise noted. Test circuit shown in Figure 1 is tuned for 1.95GHz output frequency and ...

Page 6

LT5521 W U TYPICAL AC PERFOR A CE CHARACTERISTICS P = –5dBm 5V 2.9V unless otherwise noted. Test circuit shown in Figure 1 is tuned for 1.045GHz output frequency. ...

Page 7

W U TYPICAL AC PERFOR A CE CHARACTERISTICS P = –5dBm 5V 2.9V unless otherwise noted. Test circuit shown in Figure 1 is tuned for 1.045GHz output frequency. Noise ...

Page 8

LT5521 W U TYPICAL AC PERFOR A CE CHARACTERISTICS = –5dBm 3.3V 2.9V unless otherwise noted. Test circuit shown in Figure 1 is tuned for 1.95GHz output CC A frequency and V ...

Page 9

W BLOCK DIAGRA TEST CIRCUITS Z14 C6 Table 1. Demonstration Board Bill of Materials REF R1, R7 Z14 Z3 L1 C1, C13 C3 C12 C2, C4, C6 C11 Z1 ...

Page 10

LT5521 U U APPLICATIO S I FOR ATIO The LT5521 is a high linearity double-balanced active mixer. The chip consists of a double-balanced mixer core, a high performance LO buffer and associated bias and enable circuitry. The chip is designed ...

Page 11

U U APPLICATIO S I FOR ATIO LT5521 R1 C2 1nF + 2:1 C13 V CC 1nF – Figure 4. Low Frequency Signal Input on the IF input frequency and the ...

Page 12

LT5521 U U APPLICATIO S I FOR ATIO 3.5 IIP3 2 250MHz IF 1 1.7GHz 1.95GHz RF 0.5 –0 –1.5 –2 ...

Page 13

U U APPLICATIO S I FOR ATIO Table 6. Matching Values Using M/A-COM ETC1.6-4-2-3 Output Transformer f L1 OUT 2.4GHz 0nH 82pF 2.2GHz 1nH 82pF 2.0GHz 2.7nH 82pF 1.7GHz 4.7nH 82pF 1.3GHz 10nH 82pF 1.0GHz 10nH 3.9pF 5 ...

Page 14

LT5521 U U APPLICATIO S I FOR ATIO 0 –5 – 6.8pF –15 – 2.7pF –25 –30 –35 0 500 1000 1500 2000 2500 3000 FREQUENCY (MHz) Figure 13. LO Port Return Loss noise performance with ...

Page 15

... RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 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. ...

Page 16

... Loop BW Multiband GSM/DCS/GPRS Phones, 45dB Dynamic Range, 250kHz Loop BW Multiband GSM/GPRS/EDGE Mobile Phones www.linear.com Offset Control, Shutdown, Adjustable Gain Offset Control, Shutdown, Adjustable Offset Offset Control, Adjustable Gain and Offset LT/TP 0604 1K • PRINTED IN THE USA LINEAR TECHNOLOGY CORPORATION 2004 5521f ...

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