LT5560
0.01MHz to 4GHz
Low Power Active Mixer
FEATURES
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DESCRIPTIO
Up or Downconverting Applications
Noise Figure: 9.3dB Typical at 900MHz Output
Conversion Gain: 2.4dB Typical
IIP3: 9dBm Typical at I
CC
= 10mA
Adjustable Supply Current: 4mA to 13.4mA
Low LO Drive Level: –2dBm
Single-Ended or Differential LO
High Port-to-Port Isolation
Enable Control with Low Off-State Leakage Current
Single 2.7V to 5V Supply
Small 3mm
×
3mm DFN Package
The LT
®
5560 is a low power, high performance broad-
band active mixer. This double-balanced mixer can be
driven by a single-ended LO source and requires only
–2dBm of LO power. The balanced design results in
low LO leakage to the output, while the integrated input
amplifier provides excellent LO to IN isolation. The sig-
nal ports can be impedance matched to a broad range
of frequencies, which allows the LT5560 to be used as
an up- or down-conversion mixer in a wide variety of
applications.
The LT5560 is characterized with a supply current of 10mA;
however, the DC current is adjustable, which allows the
performance to be optimized for each application with a
single resistor. For example, when biased at its maximum
supply current (13.4mA), the typical upconverting mixer
IIP3 is +10.8dBm for a 900MHz output.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
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Portable Wireless
CATV/DBS Receivers
WiMAX Radios
PHS Basestations
RF Instrumentation
Microwave Data Links
VHF/UHF 2-Way Radios
TYPICAL APPLICATIO
Low Cost 900MHz Downconverting Mixer
2.7V TO 5.3V
LO
IN
1µF
760MHz
10
100pF
100pF
15nH
1
4.7pF
EN
2
3
RF
IN
900MHz
100pF
6.8nH
4.7pF
4
IN
–
PGND
9
OUT
–
5
LO
–
EN
IN
+
U1
LT5560
LO
+
V
CC
OUT
+
8
7
6
270nH
270nH
4.7pF
270nH
IF
OUT
33pF 140MHz
1nF
POWER LEVEL (dBm/Tone)
0
–10
–20
–30
–40
–50
–60
–70
IM3
T
A
= 25°C
V
CC
= 3V
I
CC
= 13.3mA
f
LO
= 760MHz
f
IF
= 140MHz
0
IF
OUT
15nH
6.8nH
4.7pF
5560 TA01
U
IF
OUT
and IM3 Levels
vs RF Input Power
–80
–20 –18 –16 –14 –12 –10 –8 –6 –4 –2
RF INPUT POWER (dBm)
5560 TA02
U
U
5560f
1
LT5560
ABSOLUTE
(Note 1)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
LO
–
1
EN 2
IN
+
3
IN
–
4
9
8
7
6
5
LO
+
V
CC
OUT
+
OUT
–
Supply Voltage .........................................................5.5V
Enable Voltage ................................ –0.3V to V
CC
+ 0.3V
LO Input Power (Differential) .............................+10dBm
Input Signal Power (Differential) ........................+10dBm
IN
+
, IN
–
DC Currents ..............................................10mA
OUT
+
, OUT
–
DC Current .........................................10mA
T
JMAX
.................................................................... 125°C
Operating Temperature Range .................–40°C to 85°C
Storage Temperature Range...................–65°C to 125°C
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 43°C/W
EXPOSED PAD (PIN 9) IS GND
MUST BE SOLDERED TO PCB
ORDER PART NUMBER
LT5560EDD
DD PART MARKING
LCBX
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DC ELECTRICAL CHARACTERISTICS
shown in Figure 1. (Note 3)
PARAMETER
Power Supply Requirements (V
CC
)
Supply Voltage
Supply Current
Shutdown Current
Enable (EN) Low = Off, High = On
EN Input High Voltage (On)
EN Input Low Voltage (Off)
Enable Pin Input Current
Turn On Time
Turn Off Time
EN = 3V
EN = 0.3V
V
CC
= 3V, R1 = 3Ω
EN = 0.3V, V
CC
= 3V
CONDITIONS
V
CC
= 3V, EN = 3V, T
A
= 25°C, unless otherwise noted. Test circuit
MIN
2.7
TYP
3
10
0.1
2
0.3
25
0.1
2
5
MAX
5.3
12
10
UNITS
V
mA
µA
V
V
µA
µA
µs
µs
AC ELECTRICAL CHARACTERISTICS
PARAMETER
Signal Input Frequency Range (Note 4)
LO Input Frequency Range (Note 4)
Signal Output Frequency Range (Note 4)
CONDITIONS
(Notes 2 and 3)
MIN
TYP
< 4000
< 4000
< 4000
MAX
UNITS
MHz
MHz
MHz
5560f
Requires External Matching
Requires External Matching
Requires External Matching
2
U
W
U
U
W W
W
LT5560
AC ELECTRICAL CHARACTERISTICS
PARAMETER
Signal Input Return Loss
LO Input Return Loss
Signal Output Return Loss
LO Input Power
CONDITIONS
Z = 50Ω, External Match
Z = 50Ω, External Match
Z = 50Ω, External Match
V
CC
= 3V, EN = 3V, T
A
= 25°C, P
IN
= –20dBm (–20dBm/tone for 2-tone
IIP3 tests,
Δf
= 1MHz), P
LO
= –2dBm, unless otherwise noted. Test circuits are shown in Figures 1, 2 and 3. (Notes 2 and 3)
MIN
TYP
15
15
15
–6 to 1
MAX
UNITS
dB
dB
dB
dBm
Upconverting Mixer Configuration: V
CC
= 3V, EN = 3V, T
A
= 25°C, P
IN
= –20dBm (–20dBm/tone for 2-tone IIP3 tests,
Δf
= 1MHz), P
LO
=
–2dBm, unless otherwise noted. High side LO for 450MHz tests, low side LO for 900MHz and 1900MHz tests. Test circuits are shown in
Figures 1 and 3. (Notes 2, 3 and 5)
PARAMETER
Conversion Gain
CONDITIONS
f
IN
= 70MHz, f
OUT
= 450MHz
f
IN
= 140MHz, f
OUT
= 900MHz
f
IN
= 140MHz, f
OUT
= 1900MHz
T
A
= –40°C to 85°C, f
OUT
= 900MHz
f
IN
= 70MHz, f
OUT
= 450MHz
f
IN
= 140MHz, f
OUT
= 900MHz
f
IN
= 140MHz, f
OUT
= 1900MHz
f
IN
= 70MHz, f
OUT
= 450MHz
f
IN
= 140MHz, f
OUT
= 900MHz
f
IN
= 140MHz, f
OUT
= 1900MHz
f
IN
= 70MHz, f
OUT
= 450MHz
f
IN
= 140MHz, f
OUT
= 900MHz
f
IN
= 140MHz, f
OUT
= 1900MHz
f
IN
= 70MHz, f
OUT
= 450MHz
f
IN
= 140MHz, f
OUT
= 900MHz
f
IN
= 140MHz, f
OUT
= 1900MHz
f
IN
= 70MHz, f
OUT
= 450MHz
f
IN
= 140MHz, f
OUT
= 900MHz
f
IN
= 140MHz, f
OUT
= 1900MHz
f
IN
= 70MHz, f
OUT
= 450MHz
f
IN
= 140MHz, f
OUT
= 900MHz
f
IN
= 140MHz, f
OUT
= 1900MHz
f
IN
= 70MHz, f
OUT
= 450MHz
f
IN
= 140MHz, f
OUT
= 900MHz
f
IN
= 140MHz, f
OUT
= 1900MHz
MIN
TYP
2.7
2.4
1.2
– 0.015
9.6
9.0
8.0
46
47
30
8.8
9.3
10.3
69
64
64
–63
–54
–36
–44
–41
–36
0.4
–2.8
–0.8
MAX
UNITS
dB
dB
dB
dB/°C
dBm
dBm
dBm
dBm
dBm
dBm
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
Conversion Gain vs Temperature
Input 3rd Order Intercept
Input 2nd Order Intercept
Single Sideband Noise Figure
IN to LO Isolation (with LO Applied)
LO to IN Leakage
LO to OUT Leakage
Input 1dB Compression Point
Downconverting Mixer Configuration: V
CC
= 3V, EN = 3V, T
A
= 25°C, P
IN
= –20dBm (–20dBm/tone for 2-tone IIP3 tests,
Δf
= 1MHz),
P
LO
= –2dBm, unless otherwise noted. High side LO for 450MHz tests, low side LO for 900MHz and 1900MHz tests. Test circuits are
shown in Figures 2 and 3. (Notes 2, 3 and 5)
PARAMETER
Conversion Gain
CONDITIONS
f
IN
= 450MHz, f
OUT
= 70MHz
f
IN
= 900MHz, f
OUT
= 140MHz
f
IN
= 1900MHz, f
OUT
= 140MHz
T
A
= – 40°C to 85°C, f
IN
= 900MHz
f
IN
= 450MHz, f
OUT
= 70MHz
f
IN
= 900MHz, f
OUT
= 140MHz
f
IN
= 1900MHz, f
OUT
= 140MHz
f
IN
= 450MHz, f
OUT
= 70MHz
f
IN
= 900MHz, f
OUT
= 140MHz
f
IN
= 1900MHz, f
OUT
= 140MHz
MIN
TYP
2.7
2.6
2.3
– 0.015
10.1
9.7
5.6
10.5
10.1
10.8
MAX
UNITS
dB
dB
dB
dB/°C
dBm
dBm
dBm
dB
dB
dB
5560f
Conversion Gain vs Temperature
Input 3rd Order Intercept
Single Sideband Noise Figure
3
LT5560
AC ELECTRICAL CHARACTERISTICS
PARAMETER
IN to LO Isolation (with LO Applied)
CONDITIONS
f
IN
= 450MHz, f
OUT
= 70MHz
f
IN
= 900MHz, f
OUT
= 140MHz
f
IN
= 1900MHz, f
OUT
= 140MHz
f
IN
= 450MHz, f
OUT
= 70MHz
f
IN
= 900MHz, f
OUT
= 140MHz
f
IN
= 1900MHz, f
OUT
= 140MHz
f
IN
= 450MHz, f
OUT
= 70MHz
f
IN
= 900MHz, f
OUT
= 140MHz
f
IN
= 1900MHz, f
OUT
= 140MHz
450MHz: f
IN
= 485MHz, f
OUT
= 70MHz
900MHz: f
IN
= 830MHz, f
OUT
= 140MHz
1900MHz: f
IN
= 1830MHz, f
OUT
= 140MHz
450MHz: f
IN
= 496.7MHz, f
OUT
= 69.9MHz
900MHz: f
IN
= 806.7MHz, f
OUT
= 140.1MHz
1900MHz: f
IN
= 1806.7MHz, f
OUT
= 140.1MHz
f
IN
= 450MHz, f
OUT
= 70MHz
f
IN
= 900MHz, f
OUT
= 140MHz
f
IN
= 1900MHz, f
OUT
= 140MHz
Downconverting Mixer Configuration: V
CC
= 3V, EN = 3V, T
A
= 25°C,
P
IN
= –20dBm (–20dBm/tone for 2-tone IIP3 tests,
Δf
= 1MHz), P
LO
= –2dBm, unless otherwise noted. High side LO for 450MHz tests,
low side LO for 900MHz and 1900MHz tests. Test circuits are shown in Figures 2 and 3. (Notes 2, 3 and 5)
MIN
TYP
52
52
25
–52
–57
–37
–47
–63
–24
–68
–69
–47
–79
–76
–62
–0.8
0
–2.2
MAX
UNITS
dB
dB
dB
dBm
dBm
dBm
dBm
dBm
dBm
dBc
dBc
dBc
dBc
dBc
dBc
dBm
dBm
dBm
LO to IN Leakage
LO to OUT Leakage
2RF – 2LO Output Spurious (Half IF)
Product (f
IN
= f
LO
+ f
OUT
/2)
3RF – 3LO Output Spurious (1/3 IF)
Product (f
IN
= f
LO
+ f
OUT
/3)
Input 1dB Compression Point
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:
Each set of frequency conditions requires an appropriate test board.
Note 3:
Specifications over the –40°C to +85°C temperature range are
assured by design, characterization and correlation with statistical process
controls.
Note 4:
Operation over a wider frequency range is possible with reduced
performance. Consult the factory for information and assistance.
Note 5:
SSB Noise Figure measurements are performed with a small-
signal noise source and bandpass filter on the RF input (downmixer) or
output (upmixer), and no other RF input signal applied.
TYPICAL DC PERFOR A CE CHARACTERISTICS
Supply Current
vs Supply Voltage
12
25°C
85°C
–40°C
1.0
11
CURRENT (mA)
CURRENT (µA)
10
9
0.2
8
2.5
3
3.5
4
4.5
VOLTAGE (V)
5
5.5
5560 G01
4
U W
(Test Circuit Shown in Figure 1)
Shutdown Current
vs Supply Voltage
25°C
85°C
–40°C
0.8
0.6
0.4
0.0
2.5
3
3.5
4
4.5
VOLTAGE (V)
5
5.5
5560 G02
5560f
LT5560
900MHz Upconverting Mixer Application:
V
CC
= 3V, I
CC
= 10mA, EN = 3V, T
A
= 25°C, f
IN
= 140MHz, P
IN
= –20dBm (–20dBm/tone for 2-tone IIP3 tests,
Δf
= 1MHz), f
LO
= 760MHz,
P
LO
= –2dBm, output measured at 900MHz, unless otherwise noted. (Test circuit shown in Figure 1)
Conversion Gain, IIP3 and SSB NF
vs RF Output Frequency
11
10
9
GAIN (dB), IIP3 (dBm)
8
7
6
5
4
3
2
1
0
850
870
890
910
930
RF OUTPUT FREQUENCY (MHz)
GAIN
25°C
85°C
–40°C
SSB NF
IIP3
15
14
13
GAIN (dB), IIP3 (dBm)
12
NOISE FIGURE (dB)
11
10
9
8
7
6
5
4
950
5560 G03
TYPICAL AC PERFOR A CE CHARACTERISTICS
Conversion Gain and IIP3
vs LO Input Power
10
8
6
4
2
0
–2
–10
IIP3
NOISE FIGURE (dB)
LO-IN and LO-OUT Leakage
vs LO Frequency
0
–10
–20
–30
–40
–50
–60
–70
700 720 740 760 780 800 820 840 860
LO FREQUENCY (MHz)
5560 G06
OUTPUT POWER (dBm/Tone)
GAIN (dB), IIP3 (dBm)
LEAKAGE (dBm)
LO-OUT
LO-IN
Gain Distribution at 900MHz
60
50
DISTRIBUTION (%)
40
30
20
10
5
0
1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5
GAIN (dB)
0
–45°C
+25°C
+90°C
DISTRIBUTION (%)
45
40
35
30
25
20
15
10
DISTRIBUTION (%)
U W
5560 G09
SSB Noise Figure
vs LO Input Power
17
16
15
25°C
85°C
–40°C
25°C
85°C
–40°C
GAIN
14
13
12
11
10
9
8
–8
–6
–4
–2
LO INPUT POWER (dBm)
0
2
5560 G04
7
–10
–8
–6
–4
–2
LO INPUT POWER (dBm)
0
2
5560 G05
Conversion Gain and IIP3
vs Supply Voltage
12
11
10
9
8
7
6
5
4
3
2
1
0
2.5
3
4.5
4
3.5
VOLTAGE (V)
5
5.5
5560 G07
RF
OUT
, IM3 and IM2 vs
IF Input Power (Two Input Tones)
0
RF
OUT
IM3
25°C
85°C
–40°C
IM2
–60
25°C
85°C
–40°C
IIP3
–20
–40
GAIN
–80
–100
–20
–10
–15
–5
IF INPUT POWER (dBm)
0
5560 G08
IIP3 Distribution at 900MHz
–45°C
+25°C
+90°C
60
50
40
30
20
10
0
7.8
8.2
8.6
9.0
9.4
IIP3 (dBm)
9.8
10.2
5560 G10
SSB Noise Figure Distribution
at 900MHz
–45°C
+25°C
+90°C
7.6
8.0
8.4 8.8 9.2 9.5
SSB NOISE FIGURE (dB)
10.0 10.4
5560 G11
5560f
5
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