LT5516EUF#PBF Linear Technology, LT5516EUF#PBF Datasheet

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LT5516EUF#PBF

Manufacturer Part Number
LT5516EUF#PBF
Description
DEMOD, QUADRATURE, 0.8-1.5GHZ, SMD
Manufacturer
Linear Technology
Datasheet

Specifications of LT5516EUF#PBF

Frequency Range
0.8GHz To 1.5GHz
Rf Type
Quadrature
Supply Voltage Range
4V To 5.25V
Rf Ic Case Style
QFN
No. Of Pins
16
Operating Temperature Range
-40°C To +85°C
Svhc
No SVHC (15-Dec-2010)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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APPLICATIO S
FEATURES
TYPICAL APPLICATIO
Frequency Range: 800MHz to 1.5GHz
High IIP3: 21.5dBm at 900MHz
High IIP2: 52dBm
Noise Figure: 12.8dB at 900MHz
Conversion Gain: 4.3dB at 900MHz
I/Q Gain Mismatch: 0.2dB
Shutdown Mode
16-Lead QFN 4mm × 4mm Package
with Exposed Pad
Cellular/PCS/UMTS Infrastructure
High Linearity Direct Conversion I/Q Receiver
High Linearity I/Q Demodulator
BPF
LNA
Figure 1. High Signal-Level I/Q Demodulator for Wireless Infrastructure
LO INPUT
ENABLE
BPF
U
RF
RF
LO
LO
EN
+
+
U
Conversion Quadrature Demodulator
0°/90°
V
5V
CC
90°
LT5516
I
I
Q
Q
OUT
OUT
OUT
OUT
+
+
DESCRIPTIO
The LT
quadrature demodulator optimized for high linearity re-
ceiver applications. It is suitable for communications
receivers where an RF or IF signal is directly converted into
I and Q baseband signals with bandwidth up to 260MHz.
The LT5516 incorporates balanced I and Q mixers, LO
buffer amplifiers and a precision, high frequency quadra-
ture generator.
In an RF receiver, the high linearity of the LT5516 provides
excellent spur-free dynamic range, even with fixed gain
front end amplification. This direct conversion receiver
can eliminate the need for intermediate frequency (IF)
signal processing, as well as the corresponding require-
ments for image filtering and IF filtering. Channel filtering
can be performed directly at the outputs of the I and Q
channels. These outputs can interface directly to channel-
select filters (LPFs) or to a baseband amplifier.
All other trademarks are the property of their respective owners.
LPF
LPF
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
800MHz to 1.5GHz Direct
®
VGA
VGA
5516 is an 800MHz to 1.5GHz direct conversion
DSP
5516 F01
U
–100
–20
–40
–60
–80
20
0
–18
I/Q Output Power, IM3 vs
RF Input Power
–14
RF INPUT POWER (dBm)
–10
P
OUT
IM3
–6
LT5516
V
T
P
f
f
f
LO
RF1
RF2
A
CC
LO
–2
= 25°C
= 901MHz
= 5v
= –10dBm
= 899.9MHz
= 900.1MHz
2
5516 TA01
5516fa
1
6

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LT5516EUF#PBF Summary of contents

Page 1

... IF filtering. Channel filtering can be performed directly at the outputs of the I and Q channels. These outputs can interface directly to channel- select filters (LPFs baseband amplifier. LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners ...

Page 2

LT5516 ABSOLUTE AXI U RATI GS (Note 1) Power Supply Voltage ............................................ 5.5V Enable Voltage ...................................................... 0, V Differential Voltage ............................... ±2V + – Differential Voltage ................................ ±2V + – Operating ...

Page 3

DC ELECTRICAL CHARACTERISTICS PARAMETER Supply Voltage Supply Current Shutdown Current Turn-On Time Turn-Off Time EN = High (On Low (Off) EN Input Current Output DC Offset Voltage + – + – ⏐ ⏐ ⏐ ⏐ – ...

Page 4

LT5516 W U TYPICAL PERFOR A CE CHARACTERISTICS (Test circuit optimized for 900MHz operation as shown in Figure 2) Supply Current vs Supply Voltage 160 R1 = 8.2Ω 85°C A 140 T = 25°C A 120 T = ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS (Test circuit optimized for 900MHz operation as shown in Figure 2) I/Q Phase Mismatch vs RF Input Frequency – 40° 85°C A ...

Page 6

LT5516 W U TYPICAL PERFOR A CE CHARACTERISTICS (Test circuit optimized for 900MHz operation as shown in Figure 2) LO-RF Leakage vs LO Input Power – 25° 8.2Ω – ...

Page 7

CTIO S GND (Pins 1, 4): Ground Pin. + – (Pins 2, 3): Differential RF Input Pins. These pins are internally biased to 1.54V. They must be driven with a differential signal. ...

Page 8

LT5516 TEST CIRCUITS T1 LDB31900M20C-416 C17 100pF Figure 3. Topside of Evaluation Board 8 C21 C18 OPT OPT J3 J5 – OUT OUT C19 C20 OPT OPT ...

Page 9

U U APPLICATIO S I FOR ATIO The LT5516 is a direct I/Q demodulator targeting high linearity receiver applications, including wireless infra- structure. It consists amplifier, I/Q mixers, a quadrature LO carrier generator and bias circuitry. The ...

Page 10

LT5516 U U APPLICATIO S I FOR ATIO I-Channel and Q-Channel Outputs Each of the I-channel and Q-channel outputs is internally connected to V though a 60Ω resistor. The output dc CC bias voltage is V – 0.68V. The outputs ...

Page 11

... MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 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 12

... Supply, 40MHz to 500MHz IF, –4dB to 57dB Linear Power Gain 48dB Dynamic Range, Temperature Compensated, 2. Supply SC70 Package 36dB Dynamic Range, SC70 Package RF Output to 3GHz, 17dBm IIP3, Integrated LO Buffer DC-3GHz, 20dBm IIP3, Integrated LO Buffer www.linear.com ● 5516fa LT 0406 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2003 ...

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