LTC5577
300MHz to 6GHz
High Signal Level Active
Downconverting Mixer
FeaTures
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DescripTion
The
LTC
®
5577
active mixer is optimized for RF downcon-
verting applications that require high input signal handling
capability and wide bandwidth. The wideband IF output uses
external resistors to set the output impedance, allowing
the flexibility to match directly into differential IF loads,
such as filters and amplifiers. The part is characterized
and specified with a 100Ω differential output impedance,
although it can be used with output impedances ranging
from 50Ω to 400Ω, with higher gain and reduced IIP3
and P1dB at the higher impedance levels. The IF output
is usable up to 1.5GHz.
In receiver applications, the high input P1dB and IIP3 allow
the use of higher gain low noise amplifiers, resulting in
higher receiver sensitivity. Integrated transformers on the
RF and LO inputs provide single-ended 50Ω interfaces,
while minimizing the solution size.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
+30dBm IIP3
+15dBm Input P1dB
0dB Conversion Gain
Wideband Differential IF Output
Very Low 2
×
2 and 3
×
3 Spurs
IF Frequency Range Up to 1.5GHz
Low LO-RF Leakage
LO Input 50Ω Matched when Shutdown
–40°C to 105°C Operation (T
C
)
Very Small Solution Size
16-Lead (4mm
×
4mm) QFN package
applicaTions
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Wireless Infrastructure Receivers
DPD Observation Receivers
CATV Infrastructure
Typical applicaTion
Wideband Downconverting Mixer with 1GHz IF Bandwidth and
+15dBm Input P1dB into 100Ω Load
100
50
IF LOAD
50
33
1nF
30
27
RF = 1.6GHz TO 2.6GHz
24 LO = 1.59GHz/0dBm
Z
RF
= 50
Z
IF
= 100 DIFFERENTIAL
21
T
C
= 25°C
18
15
IADJ
5577 TA01a
Voltage Conversion Gain and
IIP3 vs IF Output Frequency
IIP3
9
8
7
6
5
4
G
V
3
G
V
(dB)
1nF
560nH
115
IF
+
RF
BIAS
EN
EN
V
CC
1nF
560nH
115
IF
–
LO
8.2pF
RF
0.7pF
LTC5577
3.9pF
1nF
LO
IIP3 (dBm)
3.3V
180mA
12
2
10 110 210 310 410 510 610 710 810 910 1010
IF OUTPUT FREQUENCY (MHz)
5577 TA01b
For more information
www.linear.com/LTC5577
1
5577f
LTC5577
absoluTe MaxiMuM raTings
(Note 1)
pin conFiguraTion
TOP VIEW
GND
GND
12 TEMP
17
GND
11 NC
10 LO
9
5
EN
6
V
CC
7
V
CC
8
IADJ
GND
IF
–
IF
+
Supply Voltage (V
CC
, IF
+
, IF
–
) ..................................4.0V
Enable Input Voltage (EN) ................–0.3V to V
CC
+ 0.3V
LO Input Power (300MHz to 6GHz) .................... +10dBm
LO Input DC Voltage............................................... ±0.1V
RF Input Power (300MHz to 6GHz) .................... +18dBm
RF Input DC Voltage ............................................... ±0.1V
TEMP Monitor Input Current ..................................10mA
Operating Temperature Range (T
C
) ........ –40°C to 105°C
Junction Temperature (T
J
) .................................... 150°C
Storage Temperature Range .................. –65°C to 150°C
16 15 14 13
GND 1
RF 2
NC 3
GND 4
UF PACKAGE
16-LEAD (4mm
×
4mm) PLASTIC QFN
T
JMAX
= 150°C,
θ
JC
= 8°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
CAUTION: THIS PART IS SENSITIVE TO ELECTROSTATIC
DISCHARGE (ESD). PROPER ESD HANDLING PRECAU-
TIONS MUST BE OBSERVED.
orDer inForMaTion
LEAD FREE FINISH
LTC5577IUF#PBF
TAPE AND REEL
LTC5577IUF#TRPBF
PART MARKING
5577
PACKAGE DESCRIPTION
16-Lead (4mm
×
4mm) Plastic QFN
CASE TEMPERATURE RANGE
–40°C to 105°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
ac elecTrical characTerisTics
PARAMETER
RF Input Frequency Range
LO Input Frequency Range
IF Output Frequency Range
RF Input Return Loss
LO Input Return Loss
IF
+
, IF
–
Output Return Loss
LO Input Power
RF to LO Isolation
RF = 300MHz to 2500MHz
RF = 2500MHz to 4000MHz
RF = 4000MHz to 6000MHz
RF = 300MHz to 6000MHz
CONDITIONS
External Matching Required
External Matching Required
External Matching Required
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
C
= 25°C, V
CC
= 3.3V, EN = High. Test circuit shown in Figure 1. (Notes 2, 3, 4)
MIN
l
l
l
TYP
300 to 6000
300 to 6000
1 to 1500
>10
>10
>10
MAX
UNITS
MHz
MHz
MHz
dB
dB
dB
Z
O
= 50Ω, 1300MHz to 4300MHz, C3 = 8.2pF, C4 = 0.7pF
Z
O
= 50Ω, 930MHz to 4000MHz, C5 = 3.9pF
Z
O
= 50Ω, 20MHz to 500MHz, L1, L2 = 560nH, R1, R2 = 115Ω
–6
0
>64
>50
>40
>30
6
dBm
dB
dB
dB
dB
RF to IF Isolation
2
5577f
For more information
www.linear.com/LTC5577
LTC5577
ac elecTrical characTerisTics
PARAMETER
Power Conversion Gain
CONDITIONS
RF = 450MHz, High Side LO
RF = 850MHz, High Side LO
RF = 1900MHz, Low Side LO
RF = 2550MHz, Low Side LO
RF = 3500MHz, Low Side LO
RF = 4900MHz, Low Side LO, IF = 900MHz
RF = 5900MHz, Low Side LO, IF = 900MHz
RF = 1900 ±140MHz, LO = 1747MHz, IF = 153 ±140MHz
T
C
= –40°C to 105ºC, RF = 1900MHz, Low Side LO
RF = 450MHz, High Side LO
RF = 850MHz, High Side LO
RF = 1900MHz, Low Side LO
RF = 2550MHz, Low Side LO
RF = 3500MHz, Low Side LO
RF = 4900MHz, Low Side LO, IF = 900MHz
RF = 5900MHz, Low Side LO, IF = 900MHz
RF = 450MHz (527MHz/373MHz), LO = 603MHz
RF = 850MHz (927MHz/773MHz), LO = 1003MHz
RF = 1900MHz (1977MHz/1823MHz), LO = 1747MHz
RF = 2550MHz (2627MHz/2473MHz), LO = 2397MHz
RF = 3500MHz (3577MHz/3423MHz), LO = 3347MHz
RF = 450MHz, High Side LO
RF = 850MHz, High Side LO
RF = 1900MHz, Low Side LO
RF = 2550MHz, Low Side LO
RF = 3500MHz, Low Side LO
RF = 4900MHz, Low Side LO, IF = 900MHz
RF = 5900MHz, Low Side LO, IF = 900MHz
RF = 850MHz, High Side LO, 750MHz Blocker at 5dBm
RF = 1900MHz, Low Side LO, 2000MHz Blocker at 5dBm
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
C
= 25°C. V
CC
= 3.3V, EN = High, P
LO
= 0dBm, IF = 153MHz, P
RF
= –3dBm (–3dBm/
tone for 2-tone tests), unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3, 4)
MIN
TYP
–0.5
0.5
0.7
0.5
0.2
0.1
–0.7
±0.2
–0.013
29.5
29.8
30.2
31.0
28.0
24.0
26.0
68
68
61
60
66
13.4
11.7
11.8
12.5
14.3
15.2
15.0
16.1
15.8
–85
–79
–86
–81
15.7
15.3
15.2
15.6
15.4
14.0
13.5
≤60
≤50
≤35
≤28
≤33
MAX
UNITS
dB
dB
dB
dB
dB
dB
dB
dB
dB/°C
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBc
dBc
dBc
dBc
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
–1.0
Conversion Gain Flatness
Conversion Gain vs Temperature
2-Tone Input 3rd Order Intercept
(∆f
RF
= 2MHz)
2-Tone Input 2nd Order Intercept
(∆f
RF
= 154MHz = f
IM2
)
SSB Noise Figure
14.0
SSB Noise Figure Under Blocking
850MHz: f
RF
= 926.5MHz at –3dBm, f
LO
= 1003MHz
1/2IF Output Spurious Product
(f
RF
Offset to Produce Spur at f
IF
= 153MHz) 1900MHz: f
RF
= 1823.5MHz at –3dBm, f
LO
= 1747MHz
850MHz: f
RF
= 952MHz at –3dBm, f
LO
= 1003MHz
1/3IF Output Spurious Product
(f
RF
Offset to Produce Spur at f
IF
= 153MHz) 1900MHz: f
RF
= 1798MHz at –3dBm, f
LO
= 1747MHz
Input 1dB Compression
RF = 450MHz, High Side LO
RF = 850MHz, High Side LO
RF = 1900MHz, Low Side LO
RF = 2550MHz, Low Side LO
RF = 3500MHz, Low Side LO
RF = 4900MHz, Low Side LO, IF = 900MHz
RF = 5900MHz, Low Side LO, IF = 900MHz
LO = 300MHz to 2500MHz
LO = 2500MHz to 5200MHz
LO = 5200MHz to 6000MHz
LO = 300MHz to 1800MHz
LO = 1800MHz to 6000MHz
LO to RF Leakage
LO to IF Leakage
For more information
www.linear.com/LTC5577
3
5577f
LTC5577
Dc elecTrical characTerisTics
PARAMETER
Supply Voltage (V
CC
)
Supply Current
Enable Logic Input (EN)
Input High Voltage (On)
Input Low Voltage (Off)
Input Current
Turn-On Time
Turn-Off Time
Mixer DC Current Adjust (IADJ)
Open-Circuit DC Voltage
Short-Circuit DC Current
Temperature Sensing Diode (TEMP)
DC Voltage at T
J
= 25°C
Voltage Temperature Coefficient
I
IN
= 10µA
I
IN
= 80µA
I
IN
= 10µA
I
IN
= 80µA
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
C
= 25°C, V
CC
= 3.3V, EN = High, unless otherwise noted. Test circuit shown in
Figure 1. (Note 2)
CONDITIONS
l
MIN
3.0
TYP
3.3
180
MAX
3.6
217
200
UNITS
V
mA
µA
V
Enabled
Disabled
EN = High
EN = Low
2.5
0.3
–60
0.3
0.1
2.2
200
V
µA
µs
µs
V
mA
mV
mV
mV/°C
mV/°C
–0.3V to V
CC
+ 0.3V
Pin Shorted to Ground
3.6
716
773
–1.75
–1.56
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LTC5577 is guaranteed functional over the –40°C to 105°C
case temperature range (θ
JC
= 8°C/W).
Note 3:
SSB Noise Figure measured with a small-signal noise source,
bandpass filter and 2dB matching pad on RF input, and bandpass filter on
the LO input.
Note 4:
Specified performance excludes external 180° IF combiner loss.
Typical Dc perForMance characTerisTics
Supply Current vs Supply Voltage
196
192
TEMP DIODE VOLTAGE (mV)
SUPPLY CURRENT (mA)
188
184
180
176
172
168
3.0
3.1
3.4
3.3
3.5
3.2
V
CC
SUPPLY VOLTAGE (V)
T
C
= 25°C
T
C
= –10°C
T
C
= –40°C
3.6
5577 G01
EN = High, Test circuit shown in Figure 1.
TEMP Diode Voltage vs Junction
Temperature
900
850
800
750
700
650
600
550
500
–45
5
30
55
80 105
–20
JUNCTION TEMPERATURE (°C)
130
5577 G02
I
IN
= 80µA
I
IN
= 10µA
T
C
= 105°C
T
C
= 85°C
T
C
= 55°C
4
5577f
For more information
www.linear.com/LTC5577
LTC5577
Figure 1. V
CC
= 3.3V, T
C
= 25°C, P
LO
= 0dBm, P
RF
= –3dBm (–3dBm/tone for 2-tone IIP3 tests, ∆f = 2MHz), IF = 153MHz, unless otherwise noted.
Conversion Gain, IIP3 and NF
vs RF Frequency
32
30
28
NF (dB), IIP3 (dBm)
26
24
22
20
18
16
14
12
NF
–1
LOW SIDE LO
HIGH SIDE LO
G
C
1
0
G
C
(dB)
IIP3
2
IIP2 (dBm)
3
70
65
P1dB (dBm)
60
55
50
45
1.3 1.6 1.9 2.2 2.5 2.8 3.1 3.4 3.7 4.0 4.3
RF FREQUENCY (GHz)
5577 G04
75
Typical perForMance characTerisTics
1300MHz to 4300MHz application. Test circuit shown in
2-Tone IIP2 vs RF Frequency
(∆f
RF
= 154MHz = f
IM2
)
T
C
= –40°C
T
C
= 25°C
T
C
= 85°C
RF Input P1dB vs RF Frequency
18
17
16
15
14
13
12
11
10
9
T
C
= –40°C
T
C
= 25°C
T
C
= 85°C
10
–2
1.3 1.6 1.9 2.2 2.5 2.8 3.1 3.4 3.7 4.0 4.3
RF FREQUENCY (GHz)
5577 G03
8
1.3 1.6 1.9 2.2 2.5 2.8 3.1 3.4 3.7 4.0 4.3
RF FREQUENCY (GHz)
5577 G05
1900MHz Conversion Gain, IIP3
and NF vs LO Power
32
29
G
C
(dB), IIP3 (dBm), NF (dB)
G
C
(dB), IIP3 (dBm), NF (dB)
26
23
20
17
14
11
8
5
2
–1
–6
G
C
–40°C
25°C
85°C
–4
–2
2
0
LO INPUT POWER (dBm)
4
6
5577 G06
2550MHz Conversion Gain, IIP3
and NF vs LO Power
32
29
32
29
G
C
(dB), IIP3 (dBm), NF (dB)
IIP3
RF = 2550MHz
LOW SIDE LO
NF
26
23
20
17
14
11
8
5
2
6
5577 G07
3500MHz Conversion Gain, IIP3
and NF vs LO Power
IIP3
RF = 1900MHz
LOW SIDE LO
NF
26
23
20
17
14
11
8
5
2
–1
–6
IIP3
NF
RF = 3500MHz
LOW SIDE LO
G
C
–40°C
25°C
85°C
G
C
–40°C
25°C
85°C
–4
–2
2
0
LO INPUT POWER (dBm)
4
–1
–6
–4
–2
2
0
LO INPUT POWER (dBm)
4
6
5577 G08
RF Isolation vs RF Frequency
70
65
60
LO LEAKAGE (dBm)
ISOLATION (dB)
55
50
45
40
35
30
25
1.3 1.6 1.9 2.2 2.5 2.8 3.1 3.4 3.7 4.0 4.3
RF FREQUENCY (GHz)
5577 G09
RF-IF
RF-LO
–20
–25
–30
–35
–40
–45
–50
–55
–60
–65
–70
–75
LO Leakage vs LO Frequency
0
–5
–10
LO-IF
LO LEAKAGE (dBm)
–15
–20
–25
–30
–35
LO to Unbalanced IF Port Leakage
vs LO Frequency
MEASURED WITHOUT 180°
IF COMBINER (SINGLE ENDED)
IF
–
LO-RF
–80
0.9 1.3 1.7 2.1 2.5 2.9 3.3 3.7 4.1 4.5 4.9
LO FREQUENCY (GHz)
5577 G10
IF
+
–40
0.9 1.3 1.7 2.1 2.5 2.9 3.3 3.7 4.1 4.5 4.9
LO FREQUENCY (GHz)
5577 G11
For more information
www.linear.com/LTC5577
5
5577f
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