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LT5521EUF#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LT5521
5521f
Very High Linearity
Active Mixer
■
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
DESCRIPTIO
U
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
PA
2.7nH
LO INPUT
–5dBm
OUT
+
GND
OUT
–
V
CC
V
CC
V
CC
EN
BIAS
IN
+
110Ω
LO
IN
–
2.7nH
4:1
BPF
82pF
6.8pF
1nF
RF
OUTPUT
5V DC
5521 TA01
82pF
6.8pF
1µF
110Ω
10pF
1nF
IF
INPUT
1nF
BPF
1:1
Fundamental, 3rd Order
Intermodulation Distortion
vs Input Power
The LT
®
5521 is a very high linearity mixer optimized for
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 50Ω
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
P
IN
(dBm)
–100
OUTPUT POWER (dBm)
–60
–20
20
–80
–40
0
–10 –6 –2 2
5521 TA02
6–12–14 –8 –4 0 4
P
FUND
IM3
f
IF
= 250MHz
f
LO
= 1.7GHz
f
RF
= 1.95GHz
P
LO
= –5dBm
T
A
= 25°C
2
LT5521
5521f
ORDER PART
NUMBER
(Note 1)
Power Supply Voltage ........................................... 5.5V
Enable Voltage ............................... –0.2V to V
CC
+ 0.2V
LO Input Power ................................................ +10dBm
LO Input DC Voltage ..................................... 0V to 1.5V
IF Input Power ................................................. +10dBm
Difference Voltage Across Output Pins ................ ±1.5V
Maximum Pin 2 or Pin 3 Current ......................... 34mA
Operating Ambient Temperature Range.. – 40°C to 85°C
Storage Temperature Range ................. –65°C to 125°C
Maximum Junction Temperature ..........................125°C
LT5521EUF
T
JMAX
= 125°C, θ
JA
= 37°C/W
EXPOSED PAD (PIN 17) IS GND
MUST BE SOLDERED TO PCB
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
V
CC
= 5V, EN = 2.9V, T
A
= 25°C unless otherwise noted.
Test circuit shown in Figure 1. (Note 2)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
16 15 14 13
5 6 7 8
TOP VIEW
17
UF PACKAGE
16-LEAD (4mm × 4mm) PLASTIC QFN
9
10
11
12
4
3
2
1GND
IN
+
IN
–
GND
OUT
+
GND
GND
OUT
–
GND
LO
GND
GND
EN
V
CC
V
CC
V
CC
DC ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
LO Frequency Range 10 to 4000 MHz
Input Frequency Range 10 to 3000 MHz
Output Frequency Range 10 to 3700 MHz
LO Input Power –5 1 dBm
LO Return Loss Z
O
= 50Ω, f
LO
= 1700MHz 12 dB
Output Return Loss Requires Matching 12 dB
Input Return Loss (Pins 2, 3) Requires Matching 15 dB
V
CC
= 5V, EN = 2.9V, T
A
= 25°C unless otherwise noted.
Test circuit shown in Figure 1. (Note 2)
AC ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Voltage 3.15 5.25 V
Supply Current 82 98 mA
Shutdown Current EN = 0.2V 20 100 µA
Enable (EN) Low = Off, High = On
Enable Mode EN = High 2.9 V
Disable Mode EN = Low 0.2 V
Enable Current EN = 5V 137 µA
Shutdown Enable Current EN = 0.2V 0.1 µA
Turn-On Time (Note 3) 200 ns
Turn-Off Time (Note 4) 200 ns
LO Voltage (Pin 15) Internally Biased 0.96 V
Input Voltage (Pins 2, 3) V
CC
= 5V, Internally Biased 2.20 V
V
CC
= 3.3V, Internally Biased 0.46 V
UF PART
MARKING
5521
3
LT5521
5521f
PARAMETER CONDITIONS MIN TYP MAX UNITS
Conversion Gain –0.5 dB
Conversion Gain Variation vs Temperature –0.009 dB/°C
Input P1dB +10 dBm
Single-Side Band Noise Figure 12.5 dB
IIP3 Two Tones, ∆f
IF
= 5MHz, P
IF
= –7dBm/Tone +24.2 dBm
IIP2 (Note 6) Two Tones, ∆f
IF
= 5MHz, P
IF
= –7dBm/Tone, +49 dBm
f
LO
+ f
IF1
+ f
IF2
LO-RF Leakage –42 dBm
LO-IF Leakage –40 dBm
V
CC
= 5V, EN = 2.9V, f
IF
= 250MHz, P
IF
= –7dBm, f
LO
= 1700MHz,
P
LO
= –5dBm, f
RF
= 1950MHz, T
A
= 25°C. Test circuit shown in Figure 1.
AC ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Conversion Gain –0.5 dB
Conversion Gain Variation vs Temperature –0.012 dB/°C
Input P1dB +10 dBm
Single-Side Band Noise Figure 12.8 dB
IIP3 Two Tones, ∆f
IF
= 5MHz, P
IF
= –7dBm/Tone +24.5 dBm
IIP2 (Note 6) Two Tones, ∆f
IF
= 5MHz, P
IF
= –7dBm/Tone, +49 dBm
f
LO
+ f
IF1
+ f
IF2
LO-RF Leakage –38 dBm
LO-IF Leakage –59 dBm
V
CC
= 5V, EN = 2.9V, f
IF
= 44MHz, P
IF
= –7dBm, f
LO
= 1001MHz, P
LO
= –5dBm, f
RF
= 1045MHz, T
A
= 25°C.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Conversion Gain –0.5 dB
Conversion Gain Variation vs Temperature –0.013 dB/°C
Input P1dB +11 dBm
Single-Side Band Noise Figure 13.5 dB
IIP3 Two Tones, ∆f
IF
= 5MHz, P
IF
= –7dBm/Tone +25.8 dBm
IIP2 (Note 6) Two Tones, ∆f
IF
= 5MHz, P
IF
= –7dBm/Tone, +50 dBm
f
LO
+ f
IF1
+ f
IF2
LO-RF Leakage –36 dBm
LO-IF Leakage –60 dBm
V
CC
= 3.3V, EN = 2.9V, f
IF
= 250MHz, P
IF
= –7dBm, f
LO
= 1700MHz, P
LO
= –5dBm, f
RF
= 1950MHz, T
A
= 25°C. (Note 5)
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Specifications over the –40°C to 85°C temperature range are
assured by design, characterization and correlation with statistical process
controls.
Note 3: Interval from the rising edge of the Enable input to the time when
the RF output is within 1dB of its steady-state output.
Note 4: Interval from the falling edge of the Enable signal to a 20dB drop
in the RF output power.
Note 5: R1 = R7 = 22.6Ω, Z1 = Z7 = 100nH.
Note 6: Second harmonic distortion measured at f
LO
+ f
IF1
+ f
IF2
.
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LT5521EUF#TRPBF

Mfr. #:
Buy LT5521EUF#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
RF Mixer Very Hi Linity Active Mixer
Lifecycle:
New from this manufacturer.
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