LTC5541IUH#TRPBF [Linear]
LTC5541 - 1.3GHz to 2.3GHz High Dynamic Range Downconverting Mixer; Package: QFN; Pins: 20; Temperature Range: -40°C to 85°C;
| 型号： | LTC5541IUH#TRPBF |
| 厂家： | 
Linear |
| 描述： | LTC5541 - 1.3GHz to 2.3GHz High Dynamic Range Downconverting Mixer; Package: QFN; Pins: 20; Temperature Range: -40°C to 85°C 局域网 射频 微波 |
| 文件： | 总16页 (文件大小：244K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LTC5541
1.3GHz to 2.3GHz
High Dynamic Range
Downconverting Mixer
FEATURES
DESCRIPTION
TheLTC®5541ispartofafamilyofhighdynamicrangepassive,
high gain downconverting mixers covering the 600MHz to
4GHzfrequencyrange.TheLTC5541isoptimizedfor1.3GHz
to2.3GHzRFapplications.TheLOfrequencymustfallwithin
the 1.4GHz to 2.0GHz range for optimum performance. A
typicalapplicationisaLTEorW-CDMAreceiverwitha1.7GHz
to 2.2GHz RF input and low-side LO.
n
Conversion Gain: 7.8dB at 1950MHz
n
IIP3: 26.4dBm at 1950MHz
n
Noise Figure: 9.6dB at 1950MHz
n
16dB NF Under +5dBm Blocking
n
High Input P1dB
n
3.3V Supply, 630mW Power Consumption
n
Shutdown Pin
n
50Ω Single-Ended RF and LO Inputs
The LTC5541 is designed for 3.3V operation, however; the
IF amplifier can be powered by 5V for the highest P1dB.
An integrated SPDT LO switch with fast switching accepts
two active LO signals, while providing high isolation.
n
LO Inputs 50Ω Matched when Shutdown
n
High Isolation LO Switch
0dBm LO Drive Level
High LO-RF and LO-IF Isolation
Small Solution Size
n
n
n
The LTC5541’s high conversion gain and high dynamic
range enable the use of lossy IF filters in high-selectivity
receiver designs, while minimizing the total solution cost,
board space and system-level variation.
n
20-Lead (5mm × 5mm) QFN package
APPLICATIONS
n
Wireless Infrastructure Receivers
High Dynamic Range Downconverting Mixer Family
(LTE, W-CDMA. TD-SCDMA, UMTS, GSM1800)
PART#
RF RANGE
LO RANGE
n
Point-To-Point Microwave Links
LTC5540
LTC5541
LTC5542
LTC5543
600MHz –1.3GHz
1.3GHz – 2.3GHz
1.6GHz – 2.7GHz
2.3GHz – 4GHz
700MHz – 1.2GHz
1.4GHz – 2.0GHz
1.7GHz – 2.5GHz
2.4GHz – 3.6GHz
n
High Dynamic Range Downmixer Applications
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.
TYPICAL APPLICATION
Wideband Receiver
Wideband Conversion Gain, IIP3
and NF vs IF Output Frequency
190MHz
SAW
190MHz
BPF
1nF
V
IF
CCIF
8.8
8.6
8.4
8.2
8.0
7.8
7.6
7.4
7.2
7.0
6.8
28
26
24
22
20
18
16
14
12
10
8
1nF
150nH
ADC
AMP
3.3V or 5V
150nH
22pF
1μF
IIP3
RF = 1950 30MHz
LO = 1760MHz
+
–
IF
IF
P
= 0dBm
LO
22pF
TEST CIRCUIT IN FIGURE 1
LO2
LO1
LTC5541
IMAGE
BPF
SYNTH 2
IF
2.2pF
RF
1920MHz
TO
RF
ALTERNATE LO FOR
FREQUENCY-HOPPING
G
C
LNA
LO
1980MHz
22pF
SHDN
(0V/3.3V)
BIAS
SYNTH 1
SHDN
NF
220
V
V
V
CC3
LOSEL
CC2
CC1
LO
1760MHz
160
170
180
190
200
210
V
CC
3.3V
LO SELECT
(0V/3.3V)
IF OUTPUT FREQUENCY (MHz)
1μF
22pF
5541 TA01
5541 TA02
5541f
1
LTC5541
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(Note 1)
TOP VIEW
Mixer Supply Voltage (V , V )...........................3.8V
CC1 CC2
LO Switch Supply Voltage (V ).............................3.8V
CC3
+
–
IF Supply Voltage (IF , IF ) ......................................5.5V
20 19 18 17 16
Shutdown Voltage (SHDN)................–0.3V to V +0.3V
CC
CC
LO2
NC
RF
1
2
3
4
5
15
14
13
12
11
LO Select Voltage (LOSEL)................–0.3V to V +0.3V
V
CC3
LO1, LO2 Input Power (1GHz to 3GHz)...................9dBm
LO1, LO2 Input DC Voltage .................................... 0.5V
RF Input Power (1GHz to 3GHz)...........................15dBm
RF Input DC Voltage............................................... 0.1V
Operating Temperature Range .................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
21
GND
GND
GND
LO1
CT
GND
SHDN
6
7
8
9 10
Junction Temperature (T ) .................................... 150°C
J
UH PACKAGE
20-LEAD (5mm s 5mm) PLASTIC QFN
= 150°C, θ = 34°C/W, θ = 3°C/W
T
JMAX
JA
JC
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
20-Lead (5mm x 5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C
LTC5541IUH#PBF
LTC5541IUH#TRPBF
5541
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard 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 VCC = 3.3V, VCCIF = 3.3V, SHDN = Low, TA = 25°C, PLO = 0dBm,
unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3, 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
LO Input Frequency Range
RF Input Frequency Range
1400 to 2000
MHz
Low-Side LO
High-Side LO
1600 to 2300
1300 to 1800
MHz
MHz
IF Output Frequency Range
RF Input Return Loss
LO Input Return Loss
IF Output Return Loss
LO Input Power
Requires External Matching
5 to 500
>12
MHz
dB
Z = 50Ω, 1300MHz to 2300MHz
O
Z = 50Ω, 1400MHz to 2000MHz
O
>12
dB
Requires External Matching
>12
dB
f
LO
f
LO
f
LO
= 1400MHz to 2000MHz
= 1400MHz to 2000MHz
= 1400MHz to 2000MHz
–4
0
6
dBm
dBm
dBm
LO to RF Leakage
<–32
<–31
LO to IF Leakage
LO Switch Isolation
LO1 Selected, 1400MHz < f < 2000MHz
52
50
dB
dB
LO
LO2 Selected, 1400MHz < f < 2000MHz
LO
RF to LO Isolation
RF to IF Isolation
f
RF
f
RF
= 1300MHz to 2300MHz
= 1300MHz to 2300MHz
>52
>33
dB
dB
5541f
2
LTC5541
AC ELECTRICAL CHARACTERISTICS VCC = 3.3V, VCCIF = 3.3V, SHDN = Low, TA = 25°C, PLO = 0dBm,
PRF = –3dBm (Δf = 2MHz for two-tone IIP3 tests),unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3, 4)
Low-Side LO Downmixer Application: RF = 1700 to 2200MHz, IF = 190MHz, f = f –f
LO
RF IF
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Conversion Gain
RF = 1750MHz
RF = 1950MHz
RF = 2150MHz
8.6
7.8
7.6
6.5
dB
Conversion Gain Flatness
RF = 1950 30MHz, LO = 1760MHz, IF=190 30MHz
0.1
dB
Conversion Gain vs Temperature
T = –40ºC to +85ºC, RF = 1950MHz
A
–0.006
dB/°C
rd
Input 3 Order Intercept
RF = 1750MHz
RF = 1950MHz
RF = 2150MHz
25.5
26.4
25.5
24.0
dBm
SSB Noise Figure
RF = 1750MHz
RF = 1950MHz
RF = 2150MHz
9.2
9.6
11.7
dB
dB
10.6
SSB Noise Figure Under Blocking
2RF – 2LO Output Spurious Product
f
f
= 1950MHz, f = 1760MHz,
BLOCK
16
RF
LO
= 2050MHz, P
= 5dBm
BLOCK
f
RF
= 1855MHz at –10dBm, f = 1760MHz, f = 190MHz
–67
–73
dBc
dBc
dBm
LO
IF
(f = f + f /2)
RF
LO
IF
3RF – 3LO Output Spurious Product
(f = f + f /3)
f
RF
= 1823.33MHz at –10dBm, f = 1760MHz, f = 190MHz
LO IF
RF
LO
IF
Input 1dB Compression
RF = 1950MHz, V
RF = 1950MHz, V
= 3.3V
= 5V
11.3
14.6
CCIF
CCIF
High-Side LO Downmixer Application: RF = 1300-1800MHz, IF = 190MHz, f = f +f
LO
RF IF
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Conversion Gain
RF = 1450MHz
RF = 1600MHz
RF = 1750MHz
8.9
8.4
8.0
dB
Conversion Gain Flatness
Conversion Gain vs Temperature
Input 3rd Order Intercept
RF = 1600MHz 30MHz, LO = 1790MHz, IF = 190 30MHz
0.1
dB
dB/°C
dBm
T = –40°C to 85°C, RF = 1600MHz
A
–0.006
RF = 1450MHz
RF = 1600MHz
RF = 1750MHz
24.5
24.6
24.3
SSB Noise Figure
RF = 1450MHz
RF = 1600MHz
RF = 1750MHz
9.5
9.9
9.9
dB
SSB Noise Figure Under Blocking
2LO – 2RF Output Spurious Product
f
f
= 1600MHz, f = 1790MHz, f = 190MHz
18
dB
dBc
RF
LO
IF
= 1500MHz, P
= 5dBm
BLOCK
BLOCK
f
RF
f
IF
= 1695MHz at –10dBm, f = 1790MHz
LO
(f = f – f )
IF/2
= 190MHz
–69
–74
RF
LO
3LO – 3RF Output Spurious Product
(f = f – f
f
RF
f
IF
= 1726.67MHz at –10dBm, f = 1790MHz
dBc
LO
)
IF/3
= 190MHz
RF
LO
Input 1dB Compression
RF = 1750MHz, V
RF = 1750MHz, V
= 3.3V
= 5V
11.1
14.4
dBm
CCIF
CCIF
5541f
3
LTC5541
DC ELECTRICAL CHARACTERISTICS VCC = 3.3V, VCCIF = 3.3V, SHDN = Low, TA = 25°C, unless otherwise
noted. Test circuit shown in Figure 1. (Note 2)
PARAMETER
Power Supply Requirements (V , V
CONDITIONS
MIN
TYP
MAX
UNITS
)
CC CCIF
V
V
Supply Voltage (Pins 6, 8 and 14)
3.1
3.1
3.3
3.3
3.5
5.3
V
V
CC
Supply Voltage (Pins 18 and 19)
CCIF
V
V
Supply Current (Pins 6 + 8 + 14)
92
100
192
108
120
228
CC
Supply Current (Pins 18 + 19)
CCIF
mA
μA
Total Supply Current (V + V
)
CCIF
CC
Total Supply Current – Shutdown
SHDN = High
500
Shutdown Logic Input (SHDN) Low = On, High = Off
SHDN Input High Voltage (Off)
3
V
V
SHDN Input Low Voltage (On)
0.3
30
SHDN Input Current
Turn On Time
–0.3V to V + 0.3V
–20
μA
μs
μs
CC
1
Turn Off Time
1.5
LO Select Logic Input (LOSEL) Low = LO1 Selected, High = LO2 Selected
LOSEL Input High Voltage
3
V
V
LOSEL Input Low Voltage
0.3
30
LOSEL Input Current
LO Switching Time
–0.3V to V + 0.3V
–20
μA
ns
CC
50
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 3: SSB Noise Figure measurements performed with a small-signal
noise source, bandpass filter and 6dB matching pad on RF input, bandpass
filter and 6dB matching pad on the LO input, and no other RF signals
applied.
Note 2: The LTC5541 is guaranteed functional over the operating
temperature range from –40°C to 85°C.
Note 4: LO switch isolation is measured at the IF output port at the IF
frequency with f
and f
offset by 2MHz.
LO1
LO2
TYPICAL DC PERFORMANCE CHARACTERISTICS SHDN = Low, Test circuit shown in Figure 1.
VCC Supply Current
vs Supply Voltage
VCCIF Supply Current
vs Supply Voltage (IF Amplifier)
Total Supply Current
vs Temperature (VCC + VCCIF
(Mixer and LO Switch)
)
100
98
96
94
92
90
88
86
84
82
80
125
115
105
95
220
210
200
V
CC
= 3.3V, V
= 5V
CCIF
85°C
25°C
–40°C
(DUAL SUPPLY)
85°C
25°C
190
180
V
CC
= V
= 3.3V
CCIF
(SINGLE SUPPLY)
–40°C
85
170
75
160
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4
SUPPLY VOLTAGE (V)
–45 –25 –5
15
35
55
75
95
V
CC
SUPPLY VOLTAGE (V)
V
CCIF
TEMPERATURE (°C)
5541 G01
5541 G02
5541 G03
5541f
4
LTC5541
TYPICAL AC PERFORMANCE CHARACTERISTICS Low-Side LO
V
CC = 3.3V, VCCIF = 3.3V, SHDN = Low, TA = 25°C, PLO = 0dBm, PRF = –3dBm (–3dBm/tone for two-tone IIP3 tests, Δf = 2MHz),
IF = 190MHz, unless otherwise noted. Test circuit shown in Figure 1.
Conversion Gain, IIP3 and NF
vs RF Frequency
LO Leakage vs LO Frequency
RF Isolation vs RF Frequency
28
26
24
22
20
18
16
14
12
10
8
–20
–30
–40
–50
–60
65
60
55
50
45
40
35
30
25
IIP3
RF-LO
LO-IF
LO-RF
RF-IF
NF
G
C
6
1.65 1.75 1.85 1.95 2.05
RF FREQUENCY (GHz)
2.15 2.25
1.2
1.4
1.6
1.8
2.0
2.2
1.3
1.5
1.7
1.9
2.1
2.3
LO FREQUENCY (GHz)
RF FREQUENCY (GHz)
5541 G04
5541 G05
5541 G06
1750MHz Conversion Gain, IIP3
and NF vs LO Power
1950MHz Conversion Gain, IIP3
and NF vs LO Power
2150MHz Conversion Gain, IIP3
and NF vs LO Power
27
25
23
21
19
17
15
13
11
9
20
18
16
14
12
10
8
27
25
23
21
19
17
15
13
11
9
20
18
16
14
12
10
8
26
24
22
20
18
16
14
12
10
8
21
19
17
15
13
11
9
IIP3
IIP3
IIP3
85°C
25°C
–40°C
85°C
25°C
–40°C
85°C
25°C
–40°C
NF
NF
NF
6
6
7
4
4
5
G
C
G
C
G
C
2
2
3
7
0
7
0
6
1
–6
–4
–2
0
2
4
6
–6
–4
–2
0
2
4
6
–6
–4
–2
0
2
4
6
LO INPUT POWER (dBm)
LO INPUT POWER (dBm)
LO INPUT POWER (dBm)
5541 G07
5541 G08
5541 G09
Conversion Gain, IIP3 and NF
Conversion Gain, IIP3 and NF
1950MHz Conversion Gain, IIP3
and RF Input P1dB vs Temperature
vs Supply Voltage (Single Supply)
vs IF Supply Voltage (Dual Supply)
27
25
23
21
19
17
15
13
11
9
20
18
16
14
12
10
8
29
22
20
18
16
14
12
28
26
24
22
20
18
16
14
12
10
8
IIP3
27
25
23
21
19
17
15
13
11
9
IIP3
IIP3
85°C
25°C
–40°C
85°C
25°C
–40°C
V
CCIF
V
CCIF
= 5.0V
= 3.3V
NF
10
8
NF
P1dB
6
6
RF = 1950MHz
RF = 1950MHz
4
V
CC
= V
V
CC
= 3.3V
4
CCIF
G
G
C
C
2
2
G
C
7
0
7
0
6
3.0
3.1
V
3.2
3.3
3.4
3.5
3.6
3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4
SUPPLY VOLTAGE (V)
–45 –25 –5
15
35
55
75
95
, V
SUPPLY VOLTAGE (V)
V
CCIF
TEMPERATURE (°C)
CC CCIF
5541 G10
5541 G11
5541 G12
5541f
5
LTC5541
TYPICAL AC PERFORMANCE CHARACTERISTICS Low-Side LO (continued)
V
CC = 3.3V, VCCIF = 3.3V, SHDN = Low, TA = 25°C, PLO = 0dBm, PRF = –3dBm (–3dBm/tone for two-tone IIP3 tests, Δf = 2MHz),
IF = 190MHz, unless otherwise noted. Test circuit shown in Figure 1.
2-Tone IF Output Power, IM3 and
2 × 2 and 3 × 3 Spur Suppression
Single-Tone IF Output Power, 2 × 2
IM5 vs RF Input Power
vs LO Power
and 3 × 3 Spurs vs RF Input Power
–50
–55
–60
–65
–70
–75
–80
20
10
20
10
RF = 1950MHz
IF
OUT
P
= –10dBm
(RF = 1950MHz)
RF
IF
OUT
LO = 1760MHz
0
0
RF1 = 1949MHz
RF2 = 1951MHz
LO = 1760MHz
LO = 1760MHz
–10
–20
–30
–40
–50
–60
–70
–80
–10
–20
–30
–40
–50
–60
–70
–80
2RF-2LO
(RF = 1855MHz)
3RF-3LO
(RF = 1823.33MHz)
2RF-2LO
(RF = 1855MHz)
3RF-3LO
(RF = 1823.33MHz)
IM3
IM5
–6
–4
–2
0
2
4
6
–12
–9
–6
–3
0
3
6
–12 –9 –6 –3
0
3
6
9
12 15
LO INPUT POWER (dBm)
RF INPUT POWER (dBm/TONE)
RF INPUT POWER (dBm)
5541 G15
5541 G13
5541 G14
LO Switch Isolation
vs LO Frequency–LO1 Selected
SSB Noise Figure
LO Switch Isolation
vs LO Frequency–LO2 Selected
vs RF Blocker Level
17
60
55
50
45
40
60
55
50
45
40
RF = 1950MHz
BLOCKER = 2050MHz
P
= –3dBm
LO2
P
LO1
= –3dBm
16
15
14
P
LO1
= 0dBm
P
= 0dBm
LO2
P
LO
= –3dBm
13
12
11
P
LO
= 0dBm
P
= 3dBm
LO2
P
LO1
= 3dBm
10
9
LOSEL = LOW
= 0dBm
LOSEL = HIGH
= 0dBm
P
= 3dBm
0
LO
P
P
LO2
LO1
–25
–20
–15
–10
–5
5
1.2
1.4
1.6
1.8
2.0
2.2
1.2
1.4
1.6
1.8
2.0
2.2
RF BLOCKER POWER (dBm)
LO FREQUENCY (GHz)
LO FREQUENCY (GHz)
5541 G16
5541 G17
5541 G18
Conversion Gain Distribution
IIP3 Distribution
SSB Noise Figure Distribution
40
35
30
25
20
15
10
5
20
18
16
14
12
10
8
35
30
25
20
15
10
5
85°C
85°C
85°C
25°C
–40°C
RF = 1950MHz
RF = 1950MHz
RF = 1950MHz
25°C
25°C
–40°C
–40°C
6
4
2
0
0
0
6.9 7.1 7.3 7.5 7.7 7.9 8.1 8.3 8.5
CONVERSION GAIN (dB)
25.0 25.4 25.8 26.2 26.6 27.0 27.4
IIP3 (dBm)
8.2 8.6 9.0 9.4 9.8 10.2 10.6 11.0
SSB NOISE FIGURE (dB)
5541 G18a
5541 G18b
5541 G18c
5541f
6
LTC5541
TYPICAL AC PERFORMANCE CHARACTERISTICS High-Side LO
V
CC = 3.3V, VCCIF = 3.3V, SHDN = Low, TA = 25°C, PLO = 0dBm, PRF = –3dBm (–3dBm/tone for two-tone IIP3 tests, Δf = 2MHz),
IF = 190MHz, unless otherwise noted. Test circuit shown in Figure 1.
1450MHz Conversion Gain, IIP3
and RF Input P1dB vs Temperature
Conversion Gain, IIP3 and NF
vs RF Frequency
1750MHz Conversion Gain, IIP3
and RF Input P1dB vs Temperature
25
23
21
19
17
15
13
11
9
25
23
21
19
17
15
13
11
9
25
23
21
19
17
15
13
11
9
IIP3
IIP3
IIP3
V
V
= 5.0V
= 3.3V
V
V
= 5.0V
= 3.3V
CCIF
CCIF
CCIF
CCIF
P1dB
C
P1dB
SSB NF
G
C
G
C
G
7
7
7
1250 1350 1450 1550 1650 1750 1850
RF FREQUENCY (MHz)
–45 –25 –5
15
35
55
75
95
–45 –25 –5
15
35
55
75
95
TEMPERATURE (°C)
TEMPERATURE (°C)
5541 G19
5541 G21
5541 G20
1600MHz Conversion Gain, IIP3
and NF vs LO Power
1750MHz Conversion Gain, IIP3
and NF vs LO Power
1450MHz Conversion Gain, IIP3
and NF vs LO Power
26
24
22
20
18
16
14
12
10
8
18
27
25
23
21
19
17
15
13
11
9
20
18
16
14
12
10
8
25
23
21
19
17
15
13
11
9
18
16
14
12
10
8
IIP3
IIP3
IIP3
16
14
12
10
NF
NF
8
NF
85°C
25°C
–40°C
6
4
2
0
6
85°C
25°C
–40°C
85°C
25°C
–40°C
6
4
4
G
C
G
G
C
C
2
2
7
0
7
0
–6
–4
–2
0
2
4
6
–6
–4
–2
0
2
4
6
–6
–4
–2
0
2
4
6
LO INPUT POWER (dBm)
LO INPUT POWER (dBm)
LO INPUT POWER (dBm)
5541 G22
5541 G22b
5541 G23
2-Tone IF Output Power, IM3 and
IM5 vs RF Input Power
Single-Tone IF Output Power, 2 × 2
and 3 × 3 Spurs vs RF Input Power
2 × 2 and 3 × 3 Spur Suppression
vs LO Power
20
10
0
20
–50
–55
–60
–65
–70
–75
–80
IF
OUT
RF = 1600MHz
10
0
(RF = 1600MHz)
P
= –10dBm
RF
IF
OUT
LO = 1790MHz
LO = 1790MHz
–10
–20
–30
–40
–50
–60
–70
–80
–10
–20
–30
–40
–50
–60
–70
–80
RF1 = 1599MHz
RF2 = 1601MHz
LO = 1790MHz
3LO-3RF
(RF = 1726.67MHz)
2LO-2RF
(RF = 1695MHz)
2LO-2RF
(RF = 1695MHz)
IM3
IM5
3LO-3RF
(RF = 1726.67MHz)
–12
–9
–6
–3
0
3
6
–12 –9 –6 –3
0
3
6
9
12 15
–6
–4
–2
0
2
4
6
RF INPUT POWER (dBm/TONE)
RF INPUT POWER (dBm)
LO INPUT POWER (dBm)
5541 G24
5541 G25
5541 G26
5541f
7
LTC5541
PIN FUNCTIONS
NC (Pin 1): This pin is not connected internally. It can be
left floating, connected to ground or to V .
LOBIAS (Pin 7): This Pin Allows Adjustment of the LO
Buffer Current. Typical DC voltage is 2.2V.
CC
RF (Pin 2): Single-Ended Input for the RF Signal. This pin
is internally connected to the primary side of the RF input
transformer, which has low DC resistance to ground. A
series DC-blocking capacitor should be used to avoid
damage to the integrated transformer. The RF input is
impedance matched, as long as the selected LO input is
driven with a 0dBm 6dB source between 1.4GHz and
2GHz.
LOSEL(Pin9):LO1/LO2SelectPin.Whentheinputvoltage
is less than 0.3V, the LO1 port is selected. When the input
voltage is greater than 3V, the LO2 port is selected. Typical
input current is 11ꢀA for LOSEL = 3.3V. This pin must not
be allowed to float.
LO1 (Pin 11) and LO2 (Pin 15): Single-Ended Inputs for
the Local Oscillators. These pins are internally biased
at 0V and require external DC blocking capacitors. Both
inputs are internally matched to 50Ω, even when the chip
is disabled (SHDN = high).
CT (Pin 3): RF Transformer Secondary Center-Tap. This
pin may require a bypass capacitor to ground. See the
ApplicationsInformationsection.Thispinhasaninternally
generated bias voltage of 1.2V. It must be DC-isolated
V
CC3
(Pin 14): Power Supply Pin for the LO Switch. This
pin must be connected to a regulated 3.3V supply and
bypassed to ground with a capacitor near the pin. Typical
DC current consumption is less than 100ꢀA.
from ground and V .
CC
GND (Pins 4, 10, 12, 13, 17, Exposed Pad Pin 21):
Ground. These pins must be soldered to the RF ground
plane on the circuit board. The exposed pad metal of the
package provides both electrical contact to ground and
good thermal contact to the printed circuit board.
IFGND (Pin 16): DC Ground Return for the IF Amplifier.
This pin must be connected to ground to complete the
IF amplifier’s DC current path. Typical DC current is
100mA.
SHDN (Pin 5): Shutdown Pin. When the input voltage is
less than 0.3V, the internal circuits supplied through pins
6, 8, 14, 18 and 19 are enabled. When the input voltage
is greater than 3V, all circuits are disabled. Typical input
current is less than 10ꢀA. This pin must not be allowed
to float.
–
+
IF (Pin 18) and IF (Pin 19): Open-Collector Differential
OutputsfortheIFAmplifier.Thesepinsmustbeconnected
to a DC supply through impedance matching inductors, or
atransformercenter-tap.TypicalDCcurrentconsumption
is 50mA into each pin.
IFBIAS(Pin20):ThisPinAllowsAdjustmentoftheIFAmplifier
Current. Typical DC voltage is 2.1V.
V
(Pin 6) and V
(Pin 8): Power Supply Pins for
CC1
CC2
the LO Buffer and Bias Circuits. These pins are internally
connectedandmustbeexternallyconnectedtoaregulated
3.3V supply, with bypass capacitors located close to the
pin. Typical current consumption is 92mA.
5541f
8
LTC5541
BLOCK DIAGRAM
20
IFBIAS
19 18
16
IFGND
21
+
–
LO2
15
IF
IF
EXPOSED
PAD
IF
AMP
V
CC3
14
RF
2
LO
AMP
LOSEL
LO1
PASSIVE
MIXER
CT
9
3
5
SHDN
BIAS
11
V
CC2
V
CC1
LOBIAS
6
8
7
GND PINS ARE
NOT SHOWN
5541 BD
TEST CIRCUIT
IF
OUT
4:1
T1
L1, L2 vs IF
Frequencies
190MHz
50Ω
C10
L2
IF (MHz)
L1, L2 (nH)
L1
140
190
240
300
380
270
150
100
56
V
CCIF
3.1V TO 5.3V
100mA
C9
C8
20
19
+
18
17
16
–
C4
IFBIAS IF
NC
IF
GND
IFGND
33
LO2
50Ω
IN
1
2
3
4
5
15
LO2
C1
REF DES
VALUE
SIZE
0402
0402
COMMENTS
AVX
RF
50Ω
IN
RF
14
V
CC3
C1
2.2pF
22pF
C7
C3, C4, C6,
C7, C8
AVX
LTC5541
CT
13
12
11
GND
C5, C9
C10
1μF
0603
0402
AVX
AVX
GND
SHDN
GND
1000pF
150nH
C3
L1, L2
0603 Coilcraft 0603CS
LO1
50Ω
SHDN
(0V/3.3V)
IN
LO1
GND
10
T1
TC4-1W-7ALN+
(WBC4-6TLB)
Mini-Circuits
(Coilcraft)
V
V
LOBIAS
7
LOSEL
9
CC2
6
CC1
(Alternate)
8
V
CC
3.1V TO 3.5V
92mA
5541 TC
C5
C6
LOSEL
(0V/3.3V)
RF
0.015”
0.062”
0.015”
GND DC1431A
BOARD
BIAS
STACK-UP
(NELCO N4000-13)
GND
Figure 1. Standard Downmixer Test Circuit Schematic (190MHz IF)
5541f
9
LTC5541
APPLICATIONS INFORMATION
Introduction
applications. When used, C2 should be located within
2mm of pin 3 for proper high-frequency decoupling. The
nominal DC voltage on the CT pin is 1.2V.
The LTC5541 consists of a high linearity passive double-
balancedmixercore,IFbufferamplifier,highspeedsingle-
pole double-throw (SPDT) LO switch, LO buffer amplifier
andbias/shutdowncircuits.SeeBlockDiagramsectionfor
a description of each pin function. The RF and LO inputs
are single-ended. The IF output is differential. Low-side or
high-side LO injection can be used. The evaluation circuit,
showninFigure1,utilizesbandpassIFoutputmatchingand
an IF transformer to realize a 50Ω single-ended IF output.
The evaluation board layout is shown in Figure 2.
For the RF input to be matched, the selected LO input
must be driven. A broadband input match is realized with
C1 = 2.2pF. The measured input return loss is shown in
Figure4forLOfrequenciesof1.4GHz, 1.75GHzand2GHz.
These LO frequencies correspond to the lower, middle
and upper values of the LO range. As shown in Figure 4,
the RF input impedance is somewhat dependent on LO
frequency, although a single value of C1 is adequate to
cover the 1.3GHz-2.3GHz RF band.
TO MIXER
RF
IN
C1
RF
CT
2
3
C2
LTC5541
5541 F03
5541 F02
Figure 2. Evaluation Board Layout
Figure 3. RF Input Schematic
0
RF Input
–5
–10
–15
–20
–25
–30
The mixer’s RF input, shown in Figure 3, is connected to
the primary winding of an integrated transformer. A 50Ω
matchisrealizedwhenaseriescapacitor, C1, isconnected
to the RF input. C1 is also needed for DC blocking if the
RF source has DC voltage present, since the primary side
of the RF transformer is DC-grounded internally. The DC
resistance of the primary is approximately 3.6Ω.
LO = 2GHz
LO = 1.4GHz
LO = 1.75GHz
The secondary winding of the RF transformer is internally
connected to the passive mixer. The center-tap of the
transformer secondary is connected to pin 3 (CT) to allow
the connection of bypass capacitor, C2. The value of C2
is LO frequency-dependent and is not required for most
1.0
1.5
2.0
2.5
3.0
FREQUENCY (GHz)
5541 F04
Figure 4. RF Input Return Loss
5541f
10
LTC5541
APPLICATIONS INFORMATION
The RF input impedance and input reflection coefficient,
versus RF frequency, is listed in Table 1. The reference
plane for this data is pin 2 of the IC, with no external
matching, and the LO is driven at 1.75GHz.
The LO switch is designed for high isolation and fast
(<50ns) switching. This allows the use of two active
synthesizers in frequency-hopping applications. If only
one synthesizer is used, then the unused LO input may
be grounded. The LO switch is powered by V
(Pin 14)
CC3
Table 1. RF Input Impedance and S11
(at Pin 2, No External Matching, LO Input Driven at 1.75GHz)
and controlled by the LOSEL logic input (Pin 9). The LO1
and LO2 inputs are always 50Ω-matched when V is
CC
S11
FREQUENCY
(GHz)
INPUT
applied to the chip, even when the chip is shutdown. The
DC resistance of the selected LO input is approximately
23Ω and the unselected input is approximately 50Ω. A
logic table for the LO switch is shown in Table 2. Measured
LO input return loss is shown in Figure 6.
IMPEDANCE
MAG
0.58
0.53
0.47
0.41
0.20
0.34
0.39
0.43
0.47
0.48
0.48
ANGLE
92.1
79.8
69.7
56.9
77.8
82.9
79.0
72.4
63.6
55.0
45.7
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
24.1 + j42.1
33.1 + j47.2
43.6 + j49.2
58.0 + j47.1
50.2 + j20.6
43.0 + j32.4
43.7 + j37.8
44.1 + j44.4
49.0 + j51.7
56.8 + j57.6
68.9 + j61.0
Table 2. LO Switch Logic Table
LOSEL
Low
ACTIVE LO INPUT
LO1
LO2
High
The LO amplifiers are powered by V
and V
(pin 8
CC2
CC1
and pin 6). When the chip is enabled (SHDN = low), the
internalbiascircuitprovidesaregulated4mAcurrenttothe
amplifier’s bias input, which in turn causes the amplifiers
to draw approximately 80mA of DC current. This 4mA
reference current is also connected to LOBIAS (Pin 7)
to allow modification of the amplifier’s DC bias current
for special applications. The recommended application
circuits require no LO amplifier bias modification, so this
pin should be left open-circuited.
LTC5541
C4
LO2
LO2
15
IN
LO BUFFER
V
CC3
14
TO
MIXER
0
C3 = C4 = 22pF
C3 LO1
IN
LO1
11
–5
4mA
BIAS
–10
SELECTED
–15
V
CC2
V
CC1
LOBIAS
LOSEL
9
7
6
8
5541 F05
–20
NOT SELECTED
OR SHUTDOWN
–25
Figure 5. LO Input Schematic
LO Inputs
–30
0.8
1.1
1.4
1.7
2.0
2.3
2.6
The mixer’s LO input circuit, shown in Figure 5, consists
of an integrated SPDT switch, a balun transformer, and
a two-stage high-speed limiting differential amplifier to
drive the mixer core. The LTC5541’s LO amplifiers are
optimized for the 1.4GHz to 2.0GHz LO frequency range.
LO frequencies above or below this frequency range may
be used with degraded performance.
FREQUENCY (GHz)
5541 F06
Figure 6. LO Input Return loss
5541f
11
LTC5541
APPLICATIONS INFORMATION
T1
The nominal LO input level is 0dBm although the limiting
amplifiers will deliver excellent performance over a 6dB
input power range. LO input power greater than 6dBm
may cause conduction of the internal ESD diodes. Series
capacitorsC3andC4optimizetheinputmatchandprovide
DC blocking.
IF
OUT
4:1
C10
L2
R1
L1
(OPTION TO
REDUCE
DC POWER)
V
CCIF
100mA L3 (OR SHORT)
C8
20
19
18
–
16
+
IFBIAS
IF
IF
IFGND
The LO1 input impedance and input reflection coefficient,
versus frequency, is shown in Table 3. The LO2 port
is identical due to the symmetric device layout and
packaging.
V
CC
IF
AMP
4mA
Table 3. LO1 Input Impedance vs Frequency
(at Pin 11, No External Matching, LOSEL = Low)
LTC5541
BIAS
S11
FREQUENCY
(GHz)
INPUT
5541 F07
IMPEDANCE
MAG
0.209
0.225
0.257
0.267
0.261
0.255
0.253
0.251
0.250
0.254
0.270
ANGLE
–65.2
Figure 7. IF Amplifier Schematic with Bandpass Match
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
55.1 – j21.8
34.5 – j11.4
29.5 – j1.2
29.6 + j6.3
31.6 + j10.9
33.5 + j13.7
35.2 + j16.1
36.9 + j17.8
38.0 + j18.9
38.3 + j19.5
37.3 + j20.4
–135.9
–176.1
+158.2
+141.5
+130.7
+121.6
+114.4
+110.0
+108.3
+108.5
transformer or discrete IF balun circuit. The evaluation
board (see Figures 1 and 2) uses a 4:1 ratio IF transformer
for impedance transformation and differential to single-
ended transformation. It is also possible to eliminate the
IF transformer and drive differential filters or amplifiers
directly.
The IF output impedance can be modeled as 300Ω in
parallel with 2.3pF at IF frequencies. An equivalent small-
signal model (including bondwire inductance) is shown in
Figure 8. Frequency-dependent differential IF output
impedance is listed in Table 4. This data is referenced
to the package pins (with no external components) and
includes the effects of IC and package parasitics.
IF Output
The IF amplifier, shown in Figure 7, has differential open-
+
–
collector outputs (IF and IF ), a DC ground return pin
(IFGND),andapinformodifyingtheinternalbias(IFBIAS).
19
18
+
–
IF
IF
TheIFoutputsmustbebiasedatthesupplyvoltage(V ),
CCIF
which is applied through matching inductors L1 and L2.
Alternatively, the IF outputs can be biased through the
center tap of a transformer. Each IF output pin draws
approximately 50mA of DC supply current (100mA total).
IFGND (pin 16) must be grounded or the amplifier will not
draw DC current. Grounding through inductor L3 may
improve LO-IF and RF-IF leakage performance in some
applications, but is otherwise not necessary. High DC
resistanceinL3willreducetheIFamplifiersupplycurrent,
which will degrade RF performance.
0.9nH
0.9nH
R
C
IF
IF
LTC5541
5541 F08
Figure 8. IF Output Small-Signal Model
For optimum single-ended performance, the differential
IF outputs must be combined through an external IF
5541f
12
LTC5541
APPLICATIONS INFORMATION
Bandpass IF Matching
4:1
IF
50Ω
OUT
V
CCIF
T1
3.1-5.3V
The IF output can be matched for IF frequencies as low
as 90MHz or as high as 500MHz using the bandpass
IF matching shown in Figure 1 and Figure 7. L1 and L2
resonate with the internal IF output capacitance at the
desired IF frequency. The value of L1, L2 is calculated
as follows:
C9
C8
L1
L2
IF
19
18
+
–
IF
LTC5541
5541 F09
2
L1, L2 = 1/[(2 π f ) • 2 • C ]
IF
IF
Figure 9. IF Output with Lowpass Matching
where C is the internal IF capacitance (listed in Table 4).
IF
Values of L1 and L2 are tabulated in Figure 1 for various IF
frequencies.ForIFfrequenciesbelow90MHz,thevaluesof
L1,L2becomeunreasonablyhighandthelowpasstopology
shown in Figure 9 is preferred. Measured IF output return
loss for bandpass IF matching is plotted in Figure 10.
0
–5
–10
Table 4. IF Output Impedance vs Frequency
DIFFERENTIAL OUTPUT
L1, L2 = 100nH
–15
FREQUENCY (MHz)
IMPEDANCE (R || X (C ))
IF IF IF
L1, L2 = 270nH
L1, L2 = 150nH
90
329 || –j769 (2.3pF)
314 || –j494 (2.3pF)
305 || –j364 (2.3pF)
310 || –j288 (2.3pF)
303 || –j226 (2.35pF)
289 || –j175 (2.4pF)
273 || –j118 (2.7pF)
–20
140
190
240
300
380
500
50 100 150 200 250 300 350 400 450
IF FREQUENCY (MHz)
5541 F10
Figure 10. IF Output Return Loss
IF Amplifier Bias
The IF amplifier delivers excellent performance with
= 3.3V, which allows the V and V supplies
Lowpass IF Matching
V
CCIF
CC
CCIF
AnalternativeIFmatchingnetworkshowninFigure9uses
a lowpass topology, which provides excellent RF to IF
to be common. With V
increased to 5V, the RF input
CCIF
P1dB increases by approximately 3dB, at the expense of
and LO to IF isolation. V
is supplied through the
CCIF
higherpowerconsumption.Mixerperformanceat1950MHz
center tap of the 4:1 transformer. Similar to the bandpass
topology, L1 and L2 cancel out the reactive part of the
internal capacitance and the impedance transformation is
realized by the 4:1 transformer. This topology is preferred
for low IF frequencies since L1 and L2 may be replaced
with shorts. The LTC5541 demo board (see Figure 2) has
been laid out to accommodate this matching topology
with very few modifications.
is shown in Table 5 with V
= 3.3V and 5V. For the
CCIF
highestconversiongain,high-Qwire-woundchipinductors
are recommended for L1 and L2, especially when using
V
CCIF
= 3.3V. Low-cost multilayer chip inductors may be
substituted, with a slight reduction in conversion gain.
Table 5. Performance Comparison with VCCIF = 3.3V and 5V
(RF = 1950MHz, Low-Side LO, IF = 190MHz)
I
G
C
P1dB
(dBm)
IIP3
(dBm)
NF
(dB)
CCIF
V
(mA)
(dB)
CCIF
3.3V
5V
100
7.8
11.3
14.6
26.4
27.3
9.6
9.7
102
7.7
5541f
13
LTC5541
APPLICATIONS INFORMATION
The IFBIAS pin (pin 20) is available for reducing the DC
current consumption of the IF amplifier, at the expense of
IIP3. This pin should be left open-circuited for optimum
performance. The internal bias circuit produces a 4mA
reference for the IF amplifier, which causes the amplifier
to draw approximately 100mA. If resistor R1 is connected
to pin 20 as shown in Figure 7, a portion of the reference
current can be shunted to ground, resulting in reduced
IF amplifier current. For example, R1 = 1kΩ will shunt
away 1.5mA from pin 20 and the IF amplifier current will
be reduced by 38% to approximately 62mA. The nominal,
open-circuit DC voltage at pin 20 is 2.1V. Table 6 lists RF
performance at 1950MHz versus IF amplifier current.
The SHDN pin must be pulled high or low. If left floating,
then the on/off state of the IC will be indeterminate. If a
three-state condition can exist at the SHDN pin, then a
pull-up or pull-down resistor must be used.
LTC5541
V
CC2
6
5
SHDN
500Ω
Table 6. Mixer Performance with Reduced IF Amplifier Current
(RF = 1950MHz, Low-Side LO, IF = 190MHz)
VCCIF =3.3V
R1
I
G
IIP3
P1dB
NF
CCIF
C
(kΩ)
(mA)
100
90
(dB)
7.8
7.5
7.4
6.9
(dBm)
(dBm)
(dB)
OPEN
4.7
2.2
1
26.4
26.0
25.3
23.4
11.4
11.6
11.7
11.7
9.6
9.6
9.5
9.7
81
5541 F11
62
Figure 11. Shutdown Input Circuit
V
= 5V
CCIF
R1
I
G
IIP3
P1dB
NF
CCIF
C
Supply Voltage Ramping
(kΩ)
(mA)
102
92
(dB)
7.7
7.5
7.2
6.7
(dBm)
(dBm)
(dB)
OPEN
4.7
2.2
1
27.3
27.2
26.5
24.7
14.6
14.7
14.8
14.0
9.7
9.6
9.6
9.7
Fast ramping of the supply voltage can cause a current
glitchintheinternalESDprotectioncircuits.Dependingon
thesupplyinductance, thiscouldresultinasupplyvoltage
transientthatexceedsthemaximumrating.Asupplyvoltage
ramp time of greater than 1ms is recommended.
83
65
Shutdown Interface
Figure 11 shows a simplified schematic of the SHDN pin
interface. To disable the chip, the SHDN voltage must be
higher than 3.0V. If the shutdown function is not required,
the SHDN pin should be connected directly to GND. The
voltage at the SHDN pin should never exceed the power
supply voltage (V ) by more than 0.3V. If this should
CC
occur, the supply current could be sourced through the
ESD diode, potentially damaging the IC.
5541f
14
LTC5541
PACKAGE DESCRIPTION
UH Package
20-Lead Plastic QFN (5mm × 5mm)
(Reference LTC DWG # 05-08-1818 Rev Ø)
0.70 p0.05
5.50 p 0.05
4.10 p 0.05
2.70 p0.05
2.60 REF
2.70 p0.05
PACKAGE
OUTLINE
0.25 p0.05
0.65 BSC
PIN 1 NOTCH
R = 0.30 TYP
OR 0.35 s 45o
CHAMFER
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
R = 0.05
TYP
R = 0.125
TYP
0.75 p 0.05
5.00 p 0.10
19 20
0.40 p 0.10
PIN 1
TOP MARK
(NOTE 6)
1
2
2.70 p 0.10
2.60 REF
5.00 p 0.10
2.70 p 0.10
(UH20) QFN 0208 REV Ø
0.200 REF
0.25 p 0.05
0.65 BSC
BOTTOM VIEW—EXPOSED PAD
0.00 – 0.05
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.20mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. 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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
5541f
15
LTC5541
TYPICAL APPLICATION
Wideband Receiver
Wideband Conversion Gain, IIP3
and NF vs IF Output Frequency
190MHz
SAW
190MHz
BPF
1nF
V
IF
CCIF
8.8
8.6
8.4
8.2
8.0
7.8
7.6
7.4
7.2
7.0
6.8
28
26
24
22
20
18
16
14
12
10
8
1nF
150nH
ADC
AMP
3.3V or 5V
150nH
22pF
1μF
IIP3
RF = 1950 30MHz
LO = 1760MHz
+
–
IF
IF
P
= 0dBm
LO
22pF
TEST CIRCUIT IN FIGURE 1
LO2
LO1
LTC5541
IMAGE
BPF
SYNTH 2
IF
2.2pF
RF
1920MHz
TO
RF
ALTERNATE LO FOR
FREQUENCY-HOPPING
G
C
LNA
LO
1980MHz
22pF
SHDN
(0V/3.3V)
BIAS
SYNTH 1
SHDN
NF
220
V
V
V
CC3
LOSEL
CC2
CC1
LO
1760MHz
160
170
180
190
200
210
V
CC
3.3V
LO SELECT
(0V/3.3V)
IF OUTPUT FREQUENCY (MHz)
1μF
22pF
5541 TA03
5541 TA04
RELATED PARTS
PART NUMBER
Infrastructure
LT5527
DESCRIPTION
COMMENTS
400MHz to 3.7GHz,
5V Downconverting Mixer
2.3dB Conversion Gain, 23.5dBm IIP3 and 12.5dB NF at 1900MHz,
5V/78mA Supply
LTC6400-X
LTC6401-X
LTC6416
LTC6412
LT5554
300MHz Low Distortion IF Amp/ADC Driver
140MHz Low Distortion IF Amp/ADC Driver
2GHz 16-Bit ADC Buffer
31dB Linear Analog VGA
Ultralow Distort IF Digital VGA
Fixed Gain of 8dB, 14dB, 20dB and 26dB; >36dBm OIP3 at 300MHz, Differential I/O
Fixed Gain of 8dB, 14dB, 20dB and 26dB; >40dBm OIP3 at 140MHz, Differential I/O
40.25dBm OIP3 to 300MHz, Programmable Fast Recovery Output Clamping
35dBm OIP3 at 240MHz, Continuous Gain Range –14dB to 17dB
48dBm OIP3 at 200MHz, 2dB to 18dB Gain Range, 0.125dB Gain Steps
LT5557
400MHz to 3.8GHz 3.3V Downconverting Mixer 2.9dB Conversion Gain, 24.7dBm IIP3 and 11.7dB NF at 1950MHz,
3.3V/82mA Supply
LT5575
LT5578
LT5579
700MHz to 2.7GHz Direct Conversion I/Q
Demodulator
400MHz to 2.7GHz High Linearty Upconverting 27dBm OIP3 at 900MHz, 24.2dBm at 1.95GHz, Integrated RF Transformer
Mixer
1.5GHz to 3.8GHz High Linearity Upconverting 27.3dBm OIP3 at 2.14GHz, NF = 9.9dB, 3.3V Supply, Single-Ended LO and RF Ports
Mixer
Integrated Baluns, 28dBm IIP3, 13dBm P1dB, 0.03dB I/Q Amplitude Match,
0.4° Phase Match
LTC5598
5MHz to 1.6GHz I/Q Modulator
27.7dBm OIP3 at 140MHz, 22.9dBm at 900MHz, –161.2dBm/Hz Noise Floor
RF Power Detectors
LT5534
50MHz to 3GHz Log RF Power Detector with
60dB Dynamic Range
1dB Output Variation over Temperature, 38ns Response Time, Log Linear
Response
LT5537
LT5570
Wide Dynamic Range Log RF/IF Detector
2.7GHz Mean-Squared Detector
Low Frequency to 1GHz, 83dB Log Linear Dynamic Range
0.5dB Accuracy Over Temperature and >50dB Dynamic Range, Fast 500ns
Rise Time
LT5581
6GHz Low Power RMS Detector
40dB Dynamic Range, 1dB Accuracy Over Temperature, 1.5mA Supply Current
ADCs
LTC2208
LTC2262-14
16-Bit, 130Msps ADC
14-Bit, 150Msps ADC Ultralow Power at 1.8V
Supply
78dBFS Noise Floor, >83dB SFDR at 250MHz
72.8dB SNR, 88dB SFDR, 149mW Power Consumption
LTC2242-12
12-Bit, 250Msps ADC
65.4dB SNR, 78dB SFDR, 740mW Power Consumption
5541f
LT 1209 • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
16
●
●
© LINEAR TECHNOLOGY CORPORATION 2009
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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