LTC6410-6
Low Distortion, Low Noise
Differential IF Amplifier with
Configurable Input Impedance
DESCRIPTION
FEATURES
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The LTC®6410-6 is a low distortion, low noise differential
IF amplifier with configurable input impedance designed
for use in applications from DC to 1.4GHz. The LTC6410-6
has 6dB of voltage gain. The LTC6410-6 is an excellent
choice for interfacing active mixers to SAW filters. It features an active input termination that allows a customized
input impedance for an optimum interface to differential
active mixers. This feature provides additional power gain
because of the impedance conversion and improved noise
performance when compared to traditional 50Ω interface
circuits. The LTC6410-6 drives a differential 50Ω load
directly with low distortion, which is suitable for driving
SAW filters and other 50Ω signal chain blocks.
1.4GHz –3dB Bandwidth
Fixed Voltage Gain of 6dB (50Ω System)
Configurable Input Impedance Allows:
Simple Interface to Active Mixers
Improved Noise Performance
Wide 2.8V to 5.25V Supply Range
Low Distortion:
36dBm OIP3 (70MHz)
33dBm OIP3 (140MHz)
31dBm OIP3 (300MHz)
Low Noise:
11dB NF (50Ω ZIN)
8dB NF (200Ω ZIN)
Differential Inputs and Outputs
Self-Biasing Inputs/Outputs
Shutdown Mode
Minimal Support Circuitry Required
16-Lead 3mm × 3mm × 0.8mm QFN Package
The LTC6410-6 operates on 3V or 5V supplies. It comes in
a compact 16-lead 3mm × 3mm QFN package and operates
over a –40°C to 85°C temperature range.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIONS
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Post-Mixer Gain Block
SAW Filter Interface/Buffering
Differential IF Signal Chain Gain Block
Differential Line Driver/Receiver
TYPICAL APPLICATION
2-Tone Spectrum Analyzer Plot
Post Mixer Gain Block (140MHz IF)
5V
0
5V
–20
82nH
24nH
0.1μF
V+
–IN
12pF
680pF
–TERM
SHDN
–OUT
18pF
LTC6410-6
+OUT
24nH
+IN
12pF
1760MHz
LO
LT5527
MIXER
18pF
+TERM
VBIAS
V–
64106 TA01a
0.1μF
SYSTEM OIP3 = 29dBm AT 1900MHz
SYSTEM NF = 15dB AT 1900MHz
OUTPUT POWER (dBm)
82nH
–10
–30
–40
–50
–60
–70
–80
–90
–100
130 132 134 136 138 140 142 144 146 148 150
FREQUENCY (MHz)
64106 TA01b
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1
LTC6410-6
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
Total Supply Voltage (V+ to V–) ................................5.5V
Amplifier Input Current (DC)
(+IN, –IN, +TERM, –TERM) .............................±10mA
Amplifier Input Power (AC)
(+IN, –IN, +TERM, –TERM) .............................18dBm
Input Current (VBIAS, SHDN) ................................±10mA
Output Current (+OUT, –OUT) ..............................±50mA
Operating Temperature Range (Note 2).... –40°C to 85°C
Specified Temperature Range (Note 3) .... –40°C to 85°C
Storage Temperature Range................... –65°C to 150°C
Junction Temperature .......................................... 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
–IN
+IN
+TERM
TOP VIEW
–TERM
(Note 1)
16 15 14 13
V– 1
12 V–
VBIAS 2
10 V+
9 V–
7
8
V+
6
–OUT
5
+OUT
4
V+
V–
11 SHDN
17
V+ 3
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
TJMAX = 150°C, θJA = 68°C/W, θJC = 4.2°C/W
EXPOSED PAD (PIN 17) IS V–, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE (Notes 2, 3)
LTC6410CUD-6#PBF
LTC6410CUD-6#TRPBF
LDBG
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 85°C
LTC6410IUD-6#PBF
LTC6410IUD-6#TRPBF
LDBG
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/
3V DC ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. V+ = 3V, V– = 0V, SHDN = 2V, +IN is shorted to +TERM, –IN is
shorted to –TERM, VBIAS = 1.5V, +IN = –IN = 1.5V, input source resistance (RS) is 25Ω on each input (50Ω differential), RL = 50Ω from
+OUT to –OUT, unless otherwise noted. VBIAS is defined as the voltage on the VBIAS pin. VOUTCM is defined as (+OUT + –OUT)/2. VINCM
is defined as (+IN + –IN)/2. VINDIFF is defined as (+IN – –IN). VOUTDIFF is defined as (+OUT – –OUT). See DC test circuit schematic.
SYMBOL
PARAMETER
CONDITIONS
GDIFF
Differential Gain
(Low Frequency S21)
VINDIFF = ±0.2V
TC GDIFF
Differential Gain Temperature
Coefficient
VSWINGDIFF
Differential Output Voltage Swing
VSWINGMIN
Output Swing Low
VSWINGMAX
Output Swing High
IOUT
Output Current Drive
VOS
Input Offset Voltage
l
MIN
TYP
MAX
5.0
4.7
6.0
6.7
7.0
l
VOUTDIFF, VINDIFF = ±2V
Single-Ended +OUT, –OUT, VINDIFF = ±2V
Single-Ended +OUT, –OUT, VINDIFF = ±2V
Short +OUT to –OUT, VINDIFF = ±2V (Note 4)
l
2.2
2.0
UNITS
dB
dB
0.003
dB/°C
2.8
VP-P
VP-P
0.7
l
0.9
1.0
V
V
1.9
1.8
2.1
l
V
V
±38
±36
±42
l
mA
mA
–2.0
–3.0
0.4
l
2.0
3.0
mV
mV
64106fa
2
LTC6410-6
3V DC ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. V+ = 3V, V– = 0V, SHDN = 2V, +IN is shorted to +TERM, –IN is
shorted to –TERM, VBIAS = 1.5V, +IN = –IN = 1.5V, input source resistance (RS) is 25Ω on each input (50Ω differential), RL = 50Ω from
+OUT to –OUT, unless otherwise noted. VBIAS is defined as the voltage on the VBIAS pin. VOUTCM is defined as (+OUT + –OUT)/2. VINCM
is defined as (+IN + –IN)/2. VINDIFF is defined as (+IN – –IN). VOUTDIFF is defined as (+OUT – –OUT). See DC test circuit schematic.
SYMBOL
PARAMETER
CONDITIONS
MIN
TC VOS
Input Offset Voltage Drift
VOSINCM
Common Mode Offset Voltage
AV
Internal Voltage Gain
IVRMIN
Input Common Mode Voltage Range,
(Min)
l
IVRMAX
Input Common Mode Voltage Range,
(Max)
l
2.0
RINDIFF
Differential Input Resistance
l
40
30
XINDIFF
Differential Input Reactance
RINCM
Input Common Mode Resistance
CMRR
Common Mode Rejection Ratio
VBIAS = 1.5V, +IN = –IN = 1V to 2V, (ΔVOUTDIFF /Gain)
RODIFF
Differential Output Resistance
VOUTDIFF = ±100mV (Note 4)
XOUTDIFF
Differential Output Reactance
ROUTCM
Common Mode Output Resistance
l
VOUTCM – VINCM
l
TYP
MAX
–0.3
–40
–50
13
μV/°C
40
50
2.7
VINDIFF = ±100mV (Note 4)
mV
mV
V/V
1.0
f = 100MHz
UNITS
V
V
58
80
100
1
Ω
Ω
pF
1000
Ω
l
45
60
dB
17
13
22
l
f = 100MHz
38
47
Ω
Ω
10
nH
7
Ω
Bias Voltage Control (VBIAS Pin)
GCM
Common Mode Gain
VBIAS = 1.2V to 1.8V (+IN and –IN floating),
ΔVOUTCM /(0.6V)
VOCMMIN
Output Common Mode Voltage
Adjustment Range, (Min)
l
VOCMMAX
Output Common Mode Voltage
Adjustment Range, (Max)
l
1.8
2.0
VOSCM
Output Common Mode Offset Voltage VOUTCM – VBIAS
–200
–400
100
l
300
400
mV
mV
RVOCM
VBIAS Input Resistance
l
2.4
2.0
3.0
3.6
4.0
kΩ
kΩ
CVBIAS
VBIAS Input Capacitance
l
0.7
0.6
0.86
1.0
1.0
V/V
V/V
1.0
1.2
V
V
3
pF
1.0
V
SHDN Pin
VIL
SHDN Input Low Voltage
l
VIH
SHDN Input High Voltage
l
IIL
SHDN Input Low Current
SHDN = 0.8V
l
IIH
SHDN Input High Current
SHDN = 2V
0.8
1.8
2
V
–200
–85
0
μA
l
–150
–30
0
μA
l
2.8
5.25
V
104
130
140
mA
mA
3
5
mA
Power Supply
VS
Operating Range
IS
Supply Current
ISSHDN
Supply Current in Shutdown
SHDN = 0.8V
l
Power Supply Rejection Ratio
V+ = 2.8V to 5.25V, VBIAS = +IN = –IN = V+/2
l
PSRR
l
73
100
dB
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3
LTC6410-6
5V DC ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. V+ = 5V, V– = 0V, SHDN = 3V, +IN is shorted to +TERM, –IN is
shorted to –TERM, VINCM = VBIAS = 2.5V, +IN = –IN = 2.5V, input source resistance (RS) is 25Ω on each input (50Ω differential), RL =
50Ω from +OUT to –OUT, unless otherwise noted. VBIAS is defined as the voltage on theVBIAS pin. VOUTCM is defined as (+OUT + –OUT)/2.
VINCM is defined as (+IN + –IN)/2. VINDIFF is defined as (+IN – –IN). VOUTDIFF is defined as (+OUT – –OUT). See DC test circuit schematic.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
GDIFF
Differential Gain (Low Frequency S21)
VIN = ±0.2V
l
5
4.7
6.1
6.7
7.0
VSWINGDIFF
Differential Output Voltage Swing
VOUTDIFF, VIN = ±4V
4.1
3.5
4.8
l
VSWINGMIN
Output Swing Low
VSWINGMAX
Output Swing High
IS
Supply Current
Single-Ended +OUT, –OUT, VIN = ±4V
Single-Ended +OUT, –OUT, VIN = ±4V
1.1
l
l
3.2
3.0
dB
dB
VP-P
VP-P
1.4
1.6
V
V
3.5
125
l
UNITS
V
V
150
160
mA
mA
SHDN Pin
VIL
SHDN Input Low Voltage
l
l
1.8
2.0
V
VIH
SHDN Input High Voltage
2.8
3
V
IIL
SHDN Input Low Current
SHDN = 1.8V
l
–300
–110
0
μA
IIH
SHDN Input High Current
SHDN = 3V
l
–200
–60
0
μA
AC ELECTRICAL CHARACTERISTICS + The l denotes
the specifications which apply over the full operating
–
temperature range, otherwise specifications are at TA = 25°C. V = 3V, V = 0V, SHDN = 2V, +IN is shorted to +TERM, –IN is shorted to
–TERM, VINCM = VBIAS = 1.5V, input source resistance (RS) is 25Ω on each input (50Ω differential), RL = 50Ω from +OUT to –OUT, +IN
and –IN are AC-coupled, unless otherwise noted. VBIAS is defined as the voltage on theVBIAS pin. VOUTCM is defined as
(+OUT + –OUT)/2. VINCM is defined as (+IN + –IN)/2. VINDIFF is defined as (+IN – –IN). VOUTDIFF is defined as (+OUT – –OUT).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
–3dBBW
–3dB Bandwidth
VINDIFF = –10dBm
1
1.4
GHz
0.1dBBW
Bandwidth for 0.1dB Flatness
0.5dBBW
Bandwidth for 0.5dB Flatness
VINDIFF = –10dBm
150
MHz
VINDIFF = –10dBm
300
MHz
SR
Slew Rate
1.5
V/ns
ts
1% Settling Time
1% Settling for a 1VP-P VOUTDIFF Step
3
ns
tON
Turn-On Time
SHDN = 0V to 3V, +OUT and –OUT Within 10% of Final Values
30
ns
tOFF
Turn-Off Time
SHDN = 3V to 0V, +OUT and –OUT Within 10% of Final Values
30
ns
0.2VP-P at VBIAS, Measured VOUTCM
1
GHz
100
V/μs
Common Mode Voltage Control (VBIAS Pin)
–3dBBWCM Common Mode Small-Signal
–3dB Bandwidth
SRCM
Common Mode Slew Rate
Noise/Harmonic Performance Input/Output Characteristics
10MHz Signal
HD2
Second Harmonic Distortion
VOUTDIFF = 0dBm
–85
dBc
HD3
Third Harmonic Distortion
VOUTDIFF = 0dBm
–71
dBc
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LTC6410-6
AC ELECTRICAL CHARACTERISTICS + The l denotes
the specifications which apply over the full operating
–
temperature range, otherwise specifications are at TA = 25°C. V = 3V, V = 0V, SHDN = 2V, +IN is shorted to +TERM, –IN is shorted to
–TERM, VINCM = VBIAS = 1.5V, input source resistance (RS) is 25Ω on each input (50Ω differential), RL = 50Ω from +OUT to –OUT, +IN
and –IN are AC-coupled, unless otherwise noted. VBIAS is defined as the voltage on theVBIAS pin. VOUTCM is defined as
(+OUT + –OUT)/2. VINCM is defined as (+IN + –IN)/2. VINDIFF is defined as (+IN – –IN). VOUTDIFF is defined as (+OUT – –OUT).
SYMBOL
PARAMETER
CONDITIONS
IM3
Third Order Intermodulated
Distortion
F1 = 9.5MHz, F2 = 10.5MHz, VOUTDIFF = 0dBm/Tone
–72
dBc
F1 = 9.5MHz, F2 = 10.5MHz, VOUTDIFF = –5dBm/Tone
–81
dBc
F1 = 9.5MHz, F2 = 10.5MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
–66
dBc
F1 = 9.5MHz, F2 = 10.5MHz, VOUTDIFF = 0dBm/Tone
36
dBm
F1 = 9.5MHz, F2 = 10.5MHz, VOUTDIFF = –5dBm/Tone
36
dBm
F1 = 9.5MHz, F2 = 10.5MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
33
dBm
12.8
dBm
OIP3
Output Third-Order Intercept
MIN
TYP
MAX
UNITS
P1dB
Output 1dB Compression Point
NF
Noise Figure
ZIN = 50Ω (Note 5)
ZIN = 200Ω
11
8
dB
dB
HD2
Second Harmonic Distortion
VOUTDIFF = 0dBm
–85
dBc
HD3
Third Harmonic Distortion
VOUTDIFF = 0dBm
–69
dBc
IM3
Third Order Intermodulated
Distortion
F1 = 69.5MHz, F2 = 70.5MHz, VOUTDIFF = 0dBm/Tone
–72
dBc
70MHz Signal
OIP3
Output Third-Order Intercept
P1dB
Output 1dB Compression Point
NF
Noise Figure
F1 = 69.5MHz, F2 = 70.5MHz, VOUTDIFF = –5dBm/Tone
–79
dBc
F1 = 69.5MHz, F2 = 70.5MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
–72
dBc
F1 = 69.5MHz, F2 = 70.5MHz, VOUTDIFF = 0dBm/Tone
36
dBm
F1 = 69.5MHz, F2 = 70.5MHz, VOUTDIFF = –5dBm/Tone
35
dBm
F1 = 69.5MHz, F2 = 70.5MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
36
dBm
12.8
dBm
ZIN = 50Ω (Note 5)
ZIN = 200Ω
11
8
dB
dB
140MHz Signal
HD2
Second Harmonic Distortion
VOUTDIFF = 0dBm
–80
dBc
HD3
Third Harmonic Distortion
VOUTDIFF = 0dBm
–62
dBc
IM3
Third Order Intermodulated
Distortion
F1 = 139.5MHz, F2 = 140.5MHz, VOUTDIFF = 0dBm/Tone
–62
dBc
F1 = 139.5MHz, F2 = 140.5MHz, VOUTDIFF = –5dBm/Tone
–70
dBc
F1 = 139.5MHz, F2 = 140.5MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
–66
dBc
F1 = 130MHz, F2 = 150MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
–66
F1 = 139.5MHz, F2 = 140.5MHz, VOUTDIFF = 0dBm/Tone
31
OIP3
Output Third-Order Intercept
Output 1dB Compression Point
dBc
dBm
F1 = 139.5MHz, F2 = 140.5MHz, VOUTDIFF = –5dBm/Tone
30
dBm
F1 = 139.5MHz, F2 = 140.5MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
33
dBm
33
dBm
12.8
dBm
F1 = 130MHz, F2 = 150MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
P1dB
–56
28
64106fa
5
LTC6410-6
AC ELECTRICAL CHARACTERISTICS + The l denotes
the specifications which apply over the full operating
–
temperature range, otherwise specifications are at TA = 25°C. V = 3V, V = 0V, SHDN = 2V, +IN is shorted to +TERM, –IN is shorted to
–TERM, VINCM = VBIAS = 1.5V, input source resistance (RS) is 25Ω on each input (50Ω differential), RL = 50Ω from +OUT to –OUT, +IN
and –IN are AC-coupled, unless otherwise noted. VBIAS is defined as the voltage on theVBIAS pin. VOUTCM is defined as
(+OUT + –OUT)/2. VINCM is defined as (+IN + –IN)/2. VINDIFF is defined as (+IN – –IN). VOUTDIFF is defined as (+OUT – –OUT).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
NF
Noise Figure
ZIN = 50Ω (Note 5)
ZIN = 200Ω
11
7
dB
dB
240MHz Signal
HD2
Second Harmonic Distortion
VOUTDIFF = 0dBm
–66
dBc
HD3
Third Harmonic Distortion
VOUTDIFF = 0dBm
–52
dBc
IM3
Third Order Intermodulated
Distortion
F1 = 239.5MHz, F2 = 240.5MHz, VOUTDIFF = 0dBm/Tone
–54
dBc
F1 = 239.5MHz, F2 = 240.5MHz, VOUTDIFF = –5dBm/Tone
–63
dBc
F1 = 239.5MHz, F2 = 240.5MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
–64
dBc
OIP3
Output Third-Order Intercept
P1dB
Output 1dB Compression Point
NF
Noise Figure
F1 = 239.5MHz, F2 = 240.5MHz, VOUTDIFF = 0dBm/Tone
27
dBm
F1 = 239.5MHz, F2 = 240.5MHz, VOUTDIFF = –5dBm/Tone
27
dBm
F1 = 239.5MHz, F2 = 240.5MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
32
dBm
12.8
dBm
ZIN = 50Ω (Note 5)
ZIN = 200Ω
11
8
dB
dB
VOUTDIFF = 0dBm
–57
dBc
380MHz Signal
HD2
Second Harmonic Distortion
HD3
Third Harmonic Distortion
VOUTDIFF = 0dBm
–45
dBc
IM3
Third Order Intermodulated
Distortion
F1 = 379.5MHz, F2 = 380.5MHz, VOUTDIFF = 0dBm/Tone
–51
dBc
F1 = 379.5MHz, F2 = 380.5MHz, VOUTDIFF = –5dBm/Tone
–64
dBc
F1 = 379.5MHz, F2 = 380.5MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
–60
dBc
F1 = 379.5MHz, F2 = 380.5MHz, VOUTDIFF = 0dBm/Tone
26
dBm
F1 = 379.5MHz, F2 = 380.5MHz, VOUTDIFF = –5dBm/Tone
27
dBm
F1 = 379.5MHz, F2 = 380.5MHz, VOUTDIFF = 0dBm/Tone,
VCC = 5V, VBIAS = 2.5V, SHDN = 3V
30
dBm
10.8
dBm
OIP3
Output Third-Order Intercept
P1dB
Output 1dB Compression Point
NF
Noise Figure
ZIN = 50Ω (Note 5)
ZIN = 200Ω
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 LTC6410C-6/LTC6410I-6 is guaranteed functional over the
operating temperature range of –40°C to 85°C.
Note 3: The LTC6410C-6 is guaranteed to meet specified performance
from 0°C to 70°C. It is designed, characterized and expected to meet
specified performance from –40°C and 85°C but is not tested or QA
12
8
dB
dB
sampled at these temperatures. The LT6410I-6 is guaranteed to meet
specified performance from –40°C to 85°C.
Note 4: This parameter is pulse tested.
Note 5: en can be calculated from ZIN = 50Ω NF with the formula:
NF
en = (10 10 – 1)4kT50
where
k = Boltzmann’s constant and
T = absolute temperature
64106fa
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LTC6410-6
TYPICAL PERFORMANCE CHARACTERISTICS
40
38
V+ = 3V
V– = 0V
ZIN = 50Ω
RL = 50Ω
VBIAS = 1.5V
POUT = 0dBm
36
34
34
32
30
28
32
30
28
26
26
–20
–30
–40
–90
–100
0
50
100 150 200 250 300 350 400
FREQUENCY (MHz)
–30
Third Order Intermodulation
Distortion vs Temperature
240MHz
–40
–50
140MHz
–60
–70
10MHz
–80
–90
30MHz
–55.0
–57.5
–60.0
V+ = 3V
V– = 0V
ZIN = 50Ω
RL = 50Ω
FREQ = 139.5MHz, 140.5MHz
POUT = 0dBm
VBIAS = 1.5V
–62.5
–65.0
70MHz
–67.5
5
0
–2.5
2.5
OUTPUT POWER (dBm)
–5
–70.0
–50 –25
0
30
28
13
12
26
100 150 200 250 300 350 400
FREQUENCY (MHz)
64106 G07
0
50
100 150 200 250 300 350 400
FREQUENCY (MHz)
64106 G06
Distortion
vs Common Mode Voltage
19
40
18
35
17
30
16
15
14
13
10
25
20
15
10
12
V+ = 5V
V– = 0V
VBIAS = 2.5V
11
50
14
10
OIP3 (dBm)
32
P1dB COMPRESSION (dBm)
34
0
15
Output 1dB Compression
vs Frequency
V+ = 5V
V– = 0V
ZIN = 50Ω
RL = 50Ω
VBIAS = 2.5V
POUT = 0dBm
36
16
64106 G05
Output Third Order Intercept
vs Frequency
38
19
ZIN = 50Ω
+
18 V = 3V
V– = 0V
17 VBIAS = 1.5V
11
25 50 75 100 125 150
TEMPERATURE (°C)
64106 G04
40
Output 1dB Compression
vs Frequency
–52.5
380MHz
5
0
–2.5
2.5
OUTPUT POWER (dBm)
64106 G03
P1dB COMPRESSION (dBm)
–20
70MHz
30MHz
–5
–50.0
V+ = 3V
V– = 0V
ZIN = 200Ω
RL = 50Ω
VBIAS = 1.5V
–10
10MHz
64106 G02
THIRD ORDER IMD (dBc)
0
140MHz
–70
22
100 150 200 250 300 350 400
FREQUENCY (MHz)
380MHz
–60
22
50
240MHz
–50
24
0
V+ = 3V
V– = 0V
ZIN = 50Ω
RL = 50Ω
–80
64106 G01
THIRD ORDER IMD (dBc)
0
–10
24
Third Order Intermodulation
Distortion vs Frequency
vs Power (ZIN = 200Ω)
OIP3 (dBm)
Third Order Intermodulation
Distortion vs Frequency vs Power
V+ = 3V
V– = 0V
ZIN = 200Ω
RL = 50Ω
VBIAS = 1.5V
POUT = 0dBm
36
OIP3 (dBm)
38
OIP3 (dBm)
Output Third Order Intercept
vs Frequency (ZIN = 200Ω)
THIRD ORDER IMD (dBc)
Output Third Order Intercept
vs Frequency
0
50
5
100 150 200 250 300 350 400
FREQUENCY (MHz)
64106 G08
V+ = 3V
V– = 0V
ZIN = 50Ω
RL = 50Ω
FREQ = 139.5MHz, 140MHz
POUT = 0dBm
0
1.2
1.3
1.4
1.6
1.5
VBIAS (V)
1.7
1.8
64106 G09
64106fa
7
LTC6410-6
TYPICAL PERFORMANCE CHARACTERISTICS
Differential Input Return Loss
vs Frequency (S11)
0
DIFFERENTIAL INPUT RETURN LOSS (dB)
10
8
DIFFERENTIAL GAIN (dB)
6
4
2
0
–2
–4
–6
V+ = 3V
V– = 0V
ZIN = 50Ω
–8
–10
1
0
V+ = 3V
V– = 0V
ZIN = 50Ω
–5
–10
–15
–20
1000
1
DIFFERENTIAL REVERSE ISOLATION (dB)
–10
–15
–20
10
100
FREQUENCY (MHz)
10
100
FREQUENCY (MHz)
1
1000
1000
64106 G12
Differential Input Return Loss
vs Frequency on a Smith Chart (S11)
Differential Output Return Loss
vs Frequency on a Smith Chart (S22)
FREQ = 1MHz TO 2GHz
V+ = 3V
V– = 0V
FREQ = 1MHz TO 2GHz
V+ = 3V
V– = 0V
V+ = 3V
V– = 0V
ZIN = 50Ω
–10
–5
64106 G11
Differential Reverse Isolation
vs Frequency (S12)
0
V+ = 3V
V– = 0V
ZIN = 50Ω
–25
–25
10
100
FREQUENCY (MHz)
64106 G10
–5
Differential Output Return Loss
vs Frequency (S22)
DIFFERENTIAL OUTPUT RETURN LOSS (dB)
Differential Gain
vs Frequency (S21)
–15
–20
100MHz
–25
1MHz
–30
–35
1MHz
100MHz
1GHz
1GHz
–40
–45
–50
10
100
FREQUENCY (MHz)
1
1000
64106 G14
64106 G15
64106 G13
Small-Signal Transient
Large-Signal Transient
1.54
1.50
1.46
2.5
5
7.5
TIME (ns)
10
15
64106 G16
2.3
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
1.58
1.42
0
Overdrive Recovery
1.9
1.7
1.5
1.3
1.1
0
2.5
5
7.5
TIME (ns)
10
15
64106 G17
1.9
1.5
1.1
0.7
0
5
10
15
TIME (ns)
20
25
64106 G18
64106fa
8
LTC6410-6
TYPICAL PERFORMANCE CHARACTERISTICS
Noise Figure vs Frequency vs ZIN
Turn-On Time
22.5 V
1.5
1.5
12.5 ZIN = 50Ω
ZIN = 100Ω
10.0
ZIN = 400Ω
0
SHDN
–OUT
0.5
0
SHDN
2
2
0
0
ZIN = 200Ω
2.5
0
100
FREQUENCY (MHz)
10
+OUT
1.0
0.5
7.5
5.0
+OUT
–OUT
1.0
17.5
VOLTAGE (V)
NOISE FIGURE (dB)
20.0
15.0
Turn-Off Time
2.0
2.0
V+ = 3V
– = 0V
VOLTAGE (V)
25.0
–2
1000
0
100
200
300
TIME (ns)
400
–2
500
0
300
200
TIME (ns)
100
64106 G20
400
500
64106 G21
64106 G19
Group Delay and Phase
vs Frequency
2.50
10
2.25
20
2.00
30
40
CMRR vs Frequency
90
100
1.75
–45
70
1.50
–90
V+ = 3V
45
V– = 0V
ZIN = 50Ω
0
PHASE
V+ = 3V
90 V– = 0V
Z = 50Ω
80 IN
CMRR (dB)
GROUP DELAY (ns)
0
PHASE (DEG)
OUTPUT POWER (dBm)
Spectrum Analyzer 2-Tone
60
1.25
–135
1.00
–180
0.75
–225
30
80
0.50
–270
20
90
0.25
–315
10
0
–360
10000
0
50
60
70
100
67.5
68.5
69.5
70.5
71.5
FREQUENCY (MHz)
72.5
GROUP DELAY
100
1000
FREQUENCY (MHz)
10
64106 G22
50
40
1
10
100
1000
FREQUENCY (MHz)
10000
64106 G24
64106 G23
DC TEST CIRCUIT SCHEMATIC
V+
3
V+
VBIAS
25Ω
VINDIFF = +IN – –IN
–IN
VINCM = +IN + –IN
2
+IN
2
13
14
25Ω
SHDN
15
16
11
5
V+
VBIAS
8
V+
–TERM
–IN
10
V+
–OUT
7
LTC6410-6
+IN
+OUT
+TERM
SHDN
V–
1
V–
4
V–
9
–OUT
RL = 50Ω
V–
12
6
+OUT
VOUTDIFF = +OUT – –OUT
VOUTCM = +OUT + –OUT
2
64106 TC
V–
64106fa
9
LTC6410-6
PIN FUNCTIONS
V– (Pins 1, 4, 9, 12, 17): Negative Power Supply (Normally
Tied to Ground). All 5 pins must be tied to the same voltage.
V– maybe tied to a voltage other than ground as long as the
voltage between V+ and V– is 2.8V to 5.5V. If the V– pins
are not tied to ground, bypass each with 680pF and 0.1μF
capacitors as close to the package as possible.
VBIAS (Pin 2): This pin sets the input and output common mode voltage by driving the +IN and –IN through a
buffer with a high output resistance of 1k. If the part is
AC-coupled at the input, the VBIAS will set the VINCM and
therefore the VOUTCM voltage. If the part is DC-coupled at
the input, VBIAS should be left floating. Internal resistors
bias VBIAS to 1.4V on a 3V supply.
V+ (Pins 3, 5, 8, 10): Positive Power Supply. All 4 pins
must be tied to the same voltage. Split supplies are possible as long as the voltage between V+ and V– is 2.8V to
5.5V. Bypass capacitors of 680pF and 0.1μF as close to the
part as possible should be used between supplies.
+OUT, –OUT (Pins 6, 7): Outputs. These pins each have
internal series termination resistors forming a differential
output resistance.
SHDN (Pin 11): This pin is internally pulled high by a typically 30k resistor to V+. By pulling this pin low the supply
current will be reduced to typically 3mA. See DC Electrical
Characteristics table for the specific logic levels.
–TERM (Pin 13): Negative Input Termination. When tied
directly to –IN, it provides an active 50Ω differential termination when +TERM is also tied directly to +IN.
–IN (Pin 14): Negative Input. This pin is normally tied to
–TERM, the input termination pin. If AC-coupled, this pin
will self bias by VBIAS.
+IN (Pin 15): Positive Input. This pin is normally tied to
+TERM, the input termination pin. If AC-coupled, this pin
will self bias by VBIAS.
+TERM (Pin 16): Positive Input Termination. When tied
directly to +IN, it provides an active 50Ω differential termination when –TERM is also tied directly to –IN.
Exposed Pad (Pin 17): V–. The Exposed Pad must be
soldered to the PCB metal.
BLOCK DIAGRAM
CEXT
(OPT) REXT
(OPT)
RT
110Ω
–TERM
–IN
–IN
V+
6.4k
VBIAS
1k
+1
AV = 2.7V/V
0.1μF
5.7k
+IN
+IN
+TERM
REXT
CEXT (OPT)
(OPT)
– –
1k
+ +
RO
11Ω
–OUT
RO
11Ω
+OUT
V–
RT
110Ω
64106 BD
64106fa
10
LTC6410-6
APPLICATIONS INFORMATION
Introduction
The LTC6410-6 is a low noise differential high speed
amplifier. By default, the LTC6410-6 has 6dB voltage gain
and is designed to operate with 50Ω differential input and
output impedances. By changing (REXT), alternative configurations provide input resistances of up to 400Ω, with
correspondingly lower noise figure and higher power gain.
The Block Diagram shows the basic circuit along with key
external components while Table 1 provides configuration
information. If the input is AC-coupled, the VBIAS pin sets
the input common mode voltage and therefore the output
common mode voltage.
Input Impedance
LTC6410-6 has been designed with very flexible input
termination circuitry. By default, with the termination pins
connected directly to the inputs, the input impedance is
58Ω, see the Block Diagram. Internally, there is 110Ω
between each input and the opposite output (RT). Dividing the resistor by the internal noise gain of 2.7 + 1 = 3.7,
29.5Ω input impedance is created (59Ω differential ). In
parallel with the 2k common mode resistance, a total of
58Ω differential input impedance is achieved. This method
of termination is used to provide lower noise figure through
the use of feedback which reduces the effective noise of
the termination resistor. By adding additional resistance in
series with the termination pins, higher input impedances
can be obtained (see Table 1). The optimum impedance
for minimizing the noise figure of the LTC6410-6 is close
to 400Ω. Because the amplifier is inherently a voltage
amplifier, the difference between the impedance at the
input and the output adds additional power gain as can
be seen in Table 1. These higher impedance levels can be
useful in interfacing with active mixers which can have
output impedance of 400Ω and beyond.
Input and Output Common Mode Bias
The LTC6410-6 is internally self-biased through the VBIAS
pin (see the Block Diagram). Therefore the LTC6410-6
can be AC-coupled with no external biasing circuitry. The
output will have approximately the same common mode
voltage as the input.
In the case of a DC-coupled input connection, the input
DC common mode voltage will also set the output common mode voltage. Note that a voltage divider is formed
between the VBIAS buffer output and the DC input source
impedance.
The VBIAS pin has an internal voltage divider which will
self bias to approximately 1.4V on a 3V supply (0.47 •
VSUPPLY). An external capacitor of 0.1μF to ground is
recommended to bypass the pin. The resistance of the pin
is 3k. See Distortion vs Common Mode graph.
For increased common mode accuracy, the +TERM and
–TERM pins can be AC-coupled to the inputs with capacitors (CEXT). This coupling prevents the feedback from the
termination resistance from creating additional DC common mode voltage error. The GCM and VOSCM of the DC
Electrical Characteristics table reflect the less accurate
DC-coupled scenario.
The termination inputs are part of a high speed feedback
loop. The physical length of the termination loop (REXT
and CEXT) must be minimized to maintain stability and
minimize gain peaking.
Gain
Internally, the LTC6410-6 has a voltage gain of 2.7V/V.
The default source and load resistances in most of the
data sheet are assumed to be 50Ω differential. Due to the
input and output resistance of the LTC6410-6 being 58Ω
and 22Ω respectively, the overall voltage gain in a 50Ω
system is 6dB (2V/V). Other source and load resistances
will produce different gains due to the resistive dividers.
Figure 1 is a system diagram for calculating gain.
RS
RIN
LTC6410-6
VS
ROUT
22Ω
RLOAD
64106 F01
Figure 1
64106fa
11
LTC6410-6
APPLICATIONS INFORMATION
Therefore the differential voltage gain can be calculated
as follows:
Voltage Gain = 2•
RIN
RL
• 2.7 •
RIN + RS
RL + ROUT
The following is an example of the 50Ω gain calculation:
58
50
• 2.7 •
58+50
50 + 22
= 2.0V/V = 6.0dB
Voltage Gain = 2•
Output Impedance
The LTC6410-6 is designed to drive a differential load of
50Ω with a total differential output resistance of 22Ω.
While the LTC6410-6 can source and sink approximately
50mA, large DC output current should be avoided. To test
the part on traditional 50Ω test equipment, AC coupling
or balun transformers (or both) may be necessary at the
input and output.
Supply Rails
The part also can be used with different input impedances
providing no additional voltage gain, but a higher power
gain.
For example, the calculation for a 100Ω input impedance
shows the effect of an impedance conversion. The voltage
gain is calculated as follows:
83
50
• 2.7 •
83+100
50 + 22
= 1.7V/V = 4.6dB
Voltage Gain = 2•
Inductance in the supply path can severely effect the performance of the LTC6410-6. Therefore it is recommended
that low inductance bypass capacitors are installed very
close to the part. 680pF and 0.1μF sized capacitors are
recommended. Additionally, the exposed pad of the part
must be connected to V– for low inductance and low
thermal resistance. Failure to provide a low impedance
supply at high frequencies can cause oscillations and
increased distortion.
SHDN
However the power gain is:
83
50
Power Gain = 2•
• 2.7 •
• 2
83+100
50 + 22
= 5.8mW/mW = 7.6dB
2
The SHDN pin self-biases to V+ through a 30k resistor.
The pin must be pulled below 0.8V in order to shut down
the part.
Applications Circuits
The graphs on the following page are examples of the
four differential input resistances used on the DC1103A
demo board with balun transformers for interfacing with
the 50Ω single-ended measurement equipment.
Table 1. Input Impedance
DIFFERENTIAL
SOURCE
RESISTANCE (Ω)
(RS)
EXTERNAL
TERMINATION
RESISTOR (Ω)
(REXT)
EFFECTIVE
DIFFERENTIAL
DIFFERENTIAL
INPUT
LOAD
OUTPUT
IMPEDANCE (Ω) RESISTANCE (Ω) RESISTANCE (Ω)
(RIN)
POWER
GAIN (dB)
VOLTAGE GAIN
(SOURCE AND
LOAD RESISTANCE
AS STATED (V/V)
NF AT 10MHz
(dB)
50
0
58
50
22
6.0
2.0
11
100
49.9
83
50
22
7.6
1.7
9
200
249
177
50
22
10.9
1.8
7
400
750
377
50
22
14.2
1.8
6
2000
Open
2000
50
22
21.5
1.9
–
64106fa
12
LTC6410-6
APPLICATIONS INFORMATION
ZIN = 100Ω, T1 = WBC2-1TL, T2 = ETC1-1-13
ZIN = 50Ω, T1 = ETC1-1-13, T2 = ETC1-1-13
49.9Ω
0.1μF
T1
–TERM
–IN
1:1
+IN
0.1μF
0.1μF
T1
1:1
+OUT
1:2
OUT
+IN
0.1μF
–5
S22
–15
S11
–25
S12
64106 TA03a
ZIN = 100Ω
VCC = 3V
15
S21
–35
NOISE FIGURE
5
S21
–5
S22
S11
–15
–25
S12
–35
–45
–45
10
100
1000
FREQUENCY (MHz)
10000
10
100
1000
FREQUENCY (MHz)
64106 TA02b
ZIN = 400Ω, T1 = WBC8-1L, T2 = ETC1-1-13
750Ω
249Ω
0.1μF
–TERM
–IN
+IN
0.1μF
GAIN AND NOISE FIGURE (dB)
25
S21
5
NOISE FIGURE
–5
S22
–15
–IN
1:8
1:1
+OUT
OUT
+IN
0.1μF
ZIN = 200Ω
V+ = 3V
V– = 0V
S11
–25
S12
–35
S21
NOISE FIGURE
ZIN = 400Ω
V+ = 3V
V– = 0V
5
–5
S22
–15
S11
–25
–35
–45
OUT
64106 TA05a
25
15
1:1
+OUT
+TERM
750Ω
64106 TA04a
T2
–OUT
LTC6410-6
ZIN = 400Ω
IN
+TERM
249Ω
15
–TERM
–OUT
LTC6410-6
ZIN = 200Ω
0.1μF
T1
T2
GAIN AND NOISE FIGURE (dB)
1:4
IN
10000
64106 TA03b
ZIN = 200Ω, T1 = WBC4-14L, T2 = ETC1-1-13
T1
OUT
+TERM
25
GAIN AND NOISE FIGURE (dB)
GAIN AND NOISE FIGURE (dB)
5
1:1
+OUT
49.9Ω
ZIN = 50Ω
VCC = 3V
NOISE FIGURE
–OUT
LTC6410-6
ZIN = 100Ω
IN
+TERM
25
T2
–IN
64106 TA03a
15
–TERM
–OUT
LTC6410-6
ZIN = 50Ω
IN
T2
S12
–45
10
100
1000
FREQUENCY (MHz)
10000
64106 TA04b
10
100
1000
FREQUENCY (MHz)
10000
64106 TA05b
64106fa
13
LTC6410-6
APPLICATIONS INFORMATION
Demoboard DC1103A Top Silkscreen
TYPICAL APPLICATION
SAW Filter Application
The differential output of the LTC6410-6 allows differential
driving of the SAW filter without the need for a transformer.
The differential nature of the LTC6410-6 allows for ease
of use in differential signal chains, and may reduce the
need for transformers.
3V
0.1μF
–TERM
V+
–IN
12.4Ω
47nH
–OUT
LTC6410-6
15pF
+OUT
+IN
V–
12.4Ω
SAWTEK
854923
120nH*
47nH*
64106 TA07
15pF
SAW Filter Application
+TERM
0.1μF
0
*COILCRAFT 0805CS
–10
–20
S21 (dB)
The schematic above shows a typical signal chain application with the LTC6410-6 in combination with a 140MHz
center frequency 24MHz bandwidth SAW filter. Without the
LTC6410-6, the attenuation of the SAW would be –11.5dB.
The networks between the LTC6410-6 and the SAW filter,
and after the SAW filter are for proper impedance matching.
–30
–40
–50
–60
–70
90 100 110 120 130 140 150 160 170 180 190
FREQUENCY (MHz)
64106 TA08
64106fa
14
LTC6410-6
PACKAGE DESCRIPTION
UD Package
16-Lead Plastic QFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1691)
0.70 p0.05
3.50 p 0.05
1.45 p 0.05
2.10 p 0.05 (4 SIDES)
PACKAGE OUTLINE
0.25 p0.05
0.50 BSC
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
3.00 p 0.10
(4 SIDES)
BOTTOM VIEW—EXPOSED PAD
PIN 1 NOTCH R = 0.20 TYP
OR 0.25 s 45o CHAMFER
R = 0.115
TYP
0.75 p 0.05
15
16
PIN 1
TOP MARK
(NOTE 6)
0.40 p 0.10
1
1.45 p 0.10
(4-SIDES)
2
(UD16) QFN 0904
0.200 REF
0.00 – 0.05
NOTE:
1. DRAWING CONFORMS TO JEDEC PACKAGE OUTLINE MO-220 VARIATION (WEED-2)
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 0.15mm 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
0.25 p 0.05
0.50 BSC
64106fa
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
15
LTC6410-6
TYPICAL APPLICATION
Demoboard DC1103A Schematic
VCC
TP1
SHDN
R16 10Ω
C17
680pF
JP1
EN
C31
0.1μF
T1
MABA-007159000000
J1 C26
–IN (1)
DS
C2
0.1μF
12
R6 0Ω 13
C1
0.1μF
V–
V– VBIAS V+
R19
OPT
1
TP5
GND
R20
OPT
C7
0.1μF
J6
TEST IN
C28
0.1μF
TP2
VCC
2.8V TO 5.5V
VCC
C14
4.7μF
5
3
C16
(1)
V–
4
C12
680pF
C19 OPT
C20 OPT
R21
(1)
R24 0Ω
C22
OPT
C34
(1)
C30
J4
0.1μF –OUT
C3
(1)
J5
+OUT
C4
0.1μF
VCC
R23 0Ω
C29
0.1μF
C15
1μF
2
T2
MABA-007159000000
R15
(1)
6
+OUT
V+
TP4
VBIAS
T3
MABA-007159000000
7
–OUT
+TERM
C11
(1)
8
V+
LTC6410-6
+IN
17
9
V–
–IN
R5 0Ω 16
VCC
10
V+
–TERM
R7 0Ω 15
C33
(1)
11
V– SHDN
R8 0Ω 14
C25 OPT
J2
+IN
C32
0.1μF
C18
0.1μF
C13
0.1μF
T4
MABA-007159000000
C6
0.1μF
R22
(1)
J7
TEST OUT
64106 TA06
C5
0.1μF
NOTE: UNLESS OTHERWISE SPECIFIED
(1) NOT POPULATED
TP3
GND
RELATED PARTS
PART NUMBER
LT1993-2
LT1993-4
LT1993-10
LT5514
LT5522
DESCRIPTION
800MHz Differential Amplifier/ADC Driver
900MHz Differential Amplifier/ADC Driver
700MHz Differential Amplifier/ADC Driver
Ultralow Distortion IF Amplifier/ADC Driver
600MHz to 2.7GHz High Signal Level Downconverting Mixer
LT5524
LT5525
Low Power, Low Distortion ADC Driver with Digitally
Programmable Gain
High Linearity, Low Power Downconverting Mixer
LT5526
High Linearity, Low Power Downconverting Mixer
LT5527
400MHz to 3.7GHz High Signal Level Downconverting Mixer
LT5557
400MHz to 3.8GHz High Signal Level Downconverting Mixer
LTC6400-20
LTC6401-20
LT6402-6
LT6402-12
LT6402-20
LT6411
1.8GHz Low Noise, Low Distortion ADC Driver for 300MHz IF
1.4GHz Low Noise, Low Distortion ADC Driver for 140MHz IF
300MHz Differential Amplifier/ADC Driver
300MHz Differential Amplifier/ADC Driver
300MHz Differential Amplifier/ADC Driver
650MHz Differential ADC Driver/Dual Selectable Gain Amplifier
COMMENTS
AV = 2V/V, NF = 12.3dB, OIP3 = 38dBm at 70MHz
AV = 4V/V, NF = 14.5dB, OIP3 = 40dBm at 70MHz
AV = 10V/V, NF = 12.7dB, OIP3 = 40dBm at 70MHz
Digitally Controlled Gain Output IP3 47dBm at 100MHz
4.5V to 5.25V Supply, 25dBm IIP3 at 900MHz, NF = 12.5dB,
50Ω Single-Ended RF and LO Ports, ROUT = 400Ω
450MHz Bandwidth, 40dBm OIP3, 4.5dB to 27dB Gain Control
Single-Ended 50Ω RF and LO Ports, 17.6dBm IIP3 at 1900MHz,
ICC = 28mA
3V to 5.3V Supply, 16.5dBm IIP3, 100kHz to 2GHz RF, NF = 11dB,
ICC = 28mA, –65dBm LO-RF Leakage
CG = 2.3dB at 1900MHz, IIP3 = 23.5dBm at 1900MHz, 440mW,
ROUT = 415Ω
CG = 2.9dB at 1950MHz, IIP3 = 24.7dBm at 1950MHz, 300mW,
ROUT = 560Ω
AV = 20dB, ZIN = 200Ω, IS(MAX) = 105mA at 25°C
AV = 20dB, ZIN = 200Ω, IS(MAX) = 62mA at 25°C
AV = 6dB, en = 3.8nV/√Hz at 20MHz, 150mW
AV = 12dB, en = 2.6nV/√Hz at 20MHz, 150mW
AV = 20dB, en = 1.9nV/√Hz at 20MHz, 150mW
3300V/μs Slew Rate, 16mA Current Consumption,
Selectable Gain: AV = –1, 1, 2
64106fa
16 Linear Technology Corporation
LT 0908 REV A • PRINTED IN USA
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(408) 432-1900 ● FAX: (408) 434-0507
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