lt5526euf-trpbf Linear Technology Corporation, lt5526euf-trpbf Datasheet

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lt5526euf-trpbf

Manufacturer Part Number
lt5526euf-trpbf
Description
High Linearity, Low Power Downconverting Mixer
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
900MHz
Operation up to 2GHz
Broadband RF, LO and IF Operation
High Input IP3: +16.5dBm at 900MHz
Typical Conversion Gain: 0.6dB at 900MHz
SSB Noise Figure: 11dB at 900MHz
On-Chip 50Ω LO Match
Integrated LO Buffer: –5dBm Drive Level
High LO-RF and LO-IF Isolation
Low Supply Current: 28mA Typ
Enable Function
Single 5V Supply
16-Lead QFN (4mm × 4mm) Package
Point-to-Point Data Communication Systems
Wireless Infrastructure
Cable Downlink Infrastructure
High Linearity Receiver Applications
LNA
900MHz
U
High Signal Level Frequency Downconversion
RF
RF
LT5526
+
BIAS
EN
LO INPUT
U
–5dBm
LO
V
CC2
+
LO
V
CC1
GND
IF
IF
5526 TA01
+
140MHz
DESCRIPTIO
The LT
for high linearity applications such as point-to-point data
transmission, cable infrastructure and wireless infrastruc-
ture systems. The device includes an internally matched
high speed LO amplifier driving a double-balanced active
mixer core. An integrated RF buffer amplifier provides
excellent LO-RF isolation. The RF and IF ports can be easily
matched across a broad range of frequencies for use in a
wide variety of applications.
The LT5526 offers a high performance alternative to
passive mixers. Unlike passive mixers which have conver-
sion loss and require high LO drive levels, the LT5526
delivers conversion gain at significantly lower LO input
levels and is much less sensitive to LO power level
variations.
, LTC and LT are registered trademarks of Linear Technology Corporation.
V
5V DC
VGA
CC
®
High Linearity, Low Power
5526 is a low power broadband mixer optimized
Downconverting Mixer
ADC
U
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
RF Input Power (Two Input Tones)
–20
P
IM3
OUT
IF Output Power and IM3 vs
RF INPUT POWER (dBm/TONE)
–15
–10
LT5526
T
f
f
f
P
IF
RF
LO
A
LO
–5
= 140MHz
= 25°C
= 900MHz
= 760MHz
= –5dBm
5526 TA02
1
5526f
0

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lt5526euf-trpbf Summary of contents

Page 1

... Unlike passive mixers which have conver- sion loss and require high LO drive levels, the LT5526 delivers conversion gain at significantly lower LO input levels and is much less sensitive to LO power level variations. , LTC and LT are registered trademarks of Linear Technology Corporation ...

Page 2

... Requires RF Matching Requires DC Blocks Requires IF Matching CONDITIONS Z = 50Ω, External Match 50Ω, External DC Blocks 50Ω, External Match INFORMATION ORDER PART TOP VIEW NUMBER LT5526EUF 12 GND + – GND PART MARKING UF PACKAGE 5526 = 125°C, θ ...

Page 3

AC ELECTRICAL CHARACTERISTICS IIP3 tests, ∆f = 1MHz –5dBm, unless otherwise noted. Test circuits shown in Figures 1 and 2. (Notes PARAMETER Isolation Conversion Gain Conversion Gain vs Temperature Input 3rd Order ...

Page 4

LT5526 W U TYPICAL AC PERFOR A CE CHARACTERISTICS T = 25° –15dB (–15dBm/tone for 2-tone IIP3 tests, ∆f = 1MHz 140MHz, unless otherwise noted. Test circuit shown in Figure 1. Conversion Gain, IIP3 and ...

Page 5

W U TYPICAL AC PERFOR A CE CHARACTERISTICS T = 25° –15dB (–15dBm/tone for 2-tone IIP3 tests, ∆f = 1MHz 140MHz, unless otherwise noted. Test circuit shown in Figure × 2 ...

Page 6

LT5526 W U TYPICAL AC PERFOR A CE CHARACTERISTICS T = 25° –15dB (–15dBm/tone for 2-tone IIP3 tests, ∆f = 1MHz 70MHz, unless otherwise noted. Test circuit shown in Figure 2. Conversion Gain and IIP3 ...

Page 7

CTIO S NC (Pins 13, 16): Not Connected Internally. These pins should be grounded on the circuit board for improved LO-to-RF and LO-to-IF isolation. + – (Pins 2, 3): ...

Page 8

LT5526 TEST CIRCUITS 900MHz 1900MHz INPUT MATCHING: C1: 1.5pF T1: LDB311G9010C-440 REF DES VALUE SIZE PART NUMBER C1 2.7pF 0402 AVX 04025A2R7CAT C2 0.01µF 0402 AVX 04023C103JAT C3 1.2pF 0402 AVX 04025A1R2BAT ...

Page 9

U U APPLICATIO S I FOR ATIO The LT5526 consists of a double-balanced mixer, RF buffer amplifier, high speed limiting LO buffer and bias/enable circuits. The IC has been optimized for downconverter applications with RF input signals to 2GHz and ...

Page 10

LT5526 U U APPLICATIO S I FOR ATIO The external inductance is split in half (1.4nH), with each half connected between the pin and C1 as shown in Figure 4. The inductance may be realized with short, high impedance printed ...

Page 11

U U APPLICATIO S I FOR ATIO The purpose provide a DC return path for Pin 3. (Another possible placement for L5 would be across Pins 2 and 3, thus using L1 as part of the ...

Page 12

LT5526 U U APPLICATIO S I FOR ATIO through impedance-matching inductors. Each IF pin draws about 7.5mA of supply current (15mA total). For optimum single-ended performance, these differential outputs must be combined externally through an IF transformer or balun. LT5526 ...

Page 13

U U APPLICATIO S I FOR ATIO R • ω • R ω Inductors L13 and L14 provide a DC path ...

Page 14

LT5526 U TYPICAL APPLICATIO S Top Layer Silkscreen 14 Evaluation Board Layouts Top Layer Metal 5526f ...

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

... BW S/H, 75.5dB SNR, 90dB SFDR, 2.25V Input Ranges www.linear.com ● Offset Control, Shutdown, Adjustable Gain OUT Offset Control, Shutdown, Adjustable Offset OUT Offset Control, Adjustable Gain and Offset OUT or 1.35V P-P LT/TP 0704 1K • PRINTED IN THE USA © LINEAR TECHNOLOGY CORPORATION 2004 P-P 5526f ...

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