FEATURES
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LTC6430-20
High Linearity Differential
RF/IF Amplifier/ADC Driver
DESCRIPTION
The
LTC
®
6430-20
is a differential gain block amplifier
designed to drive high resolution, high speed ADCs with
excellent linearity beyond 1000MHz and with low associ-
ated output noise. The LTC6430-20 operates from a single
5V power supply and consumes only 850mW.
In its differential configuration, the LTC6430-20 can directly
drive the differential inputs of an ADC. Using 1:2 baluns,
the device makes an excellent 50Ω wideband balanced
amplifier. While using 1:1.33 baluns, the device creates
a high fidelity 40MHz to 1000MHz 75Ω CATV amplifier.
The LTC6430-20 is designed for ease of use, requiring a
minimum of support components. The device is internally
matched to 100Ω differential source/load impedance. On-
chip bias and temperature compensation ensure consistent
performance over environmental changes.
The LTC6430-20 uses a high performance SiGe BiCMOS
process for excellent repeatability compared with similar
GaAs amplifiers. All A-grade LTC6430-20 devices are tested
and guaranteed for OIP3 at 380MHz. The LTC6430-20 is
housed in a 4mm × 4mm, 24-lead, QFN package with an
exposed pad for thermal management and low inductance.
A single-ended 50Ω IF gain block with similar performance
is also available, see the related LTC6431-20.
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.
51.0dBm OIP3 at 240MHz into a 100Ω Diff Load
NF = 2.9dB at 240MHz
20MHz to 2060MHz –3dB Bandwidth
20.8dB Gain
A-Grade 100% OIP3 Tested at 380MHz
0.6nV/√Hz Total Input Noise
S11 < –10dB Up to 1.4GHz
S22 < –10dB Up to 1.4GHz
>2.75V
P-P
Linear Output Swing
P1dB = 24.0dBm
Insensitive to V
CC
Variation
100Ω Differential Gain-Block Operation
Input/Output Internally Matched to 100Ω Diff
Single 5V Supply
DC Power = 850mW
4mm × 4mm, 24-Lead QFN Package
APPLICATIONS
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Differential ADC Driver
Differential IF Amplifier
OFDM Signal Chain Amplifier
50Ω Balanced IF Amplifier
75Ω CATV Amplifier
700MHz to 800MHz LTE Amplifier
Low Phase Noise Clock or LO Amplifier
TYPICAL APPLICATION
Differential 16-Bit ADC Driver
5V
V
CM
55
50
OIP3 vs Frequency
V
CC
= 5V
1:2
BALUN
50
R
SOURCE
= 100
DIFFERENTIAL
LTC6430-20
OIP3 (dBm)
ADC
FILTER
643020 TA01a
R
F
CHOKES
45
40
V = 5V
35 P
CC
= 3dBm/TONE
OUT
.
Z
IN
= Z
OUT
= 100 DIFF
T
A
= 25°C
30
200
400
600
0
FREQUENCY (MHz)
R
LOAD
= 100
DIFFERENTIAL
800
1000
643020 TA01b
643020f
For more information
www.linear.com/LTC6430-20
1
LTC6430-20
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
GND
DNC
DNC
DNC
18 +OUT
17 GND
25
GND
16 T_DIODE
15 DNC
14 GND
13 –OUT
7
–IN
8
GND
9 10 11 12
V
CC
DNC
DNC
DNC
V
CC
+IN
DNC 1
DNC 2
DNC 3
DNC 4
DNC 5
DNC 6
Total Supply Voltage (V
CC
to GND)...........................5.5V
Amplifier Output Current (+OUT) .........................120mA
Amplifier Output Current (–OUT) .........................120mA
RF Input Power, Continuous, 50Ω (Note 2)........ +15dBm
RF Input Power, 100µs Pulse, 50Ω (Note 2) ......+20dBm
Operating Temperature Range (T
CASE
) ...–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Junction Temperature (T
J
) .................................... 150°C
24 23 22 21 20 19
UF PACKAGE
24-LEAD (4mm
×
4mm) PLASTIC QFN
T
JMAX
= 150°C,
θ
JC
= 40°C/W*
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
*Measured from Junction to the back of a PCB with natural convection.
ORDER INFORMATION
The LTC6430-20 is available in two grades. The A-grade guarantees a minimum OIP3 at 380MHz while the B-grade does not.
LEAD FREE FINISH
LTC6430AIUF-20#PBF
LTC6430BIUF-20#PBF
TAPE AND REEL
LTC6430AIUF-20#TRPBF
LTC6430BIUF-20#TRPBF
PART MARKING
43020
43020
PACKAGE DESCRIPTION
24-Lead (4mm × 4mm) Plastic QFN
24-Lead (4mm × 4mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°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/
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
CC
= 5V, Z
SOURCE
= Z
LOAD
= 100Ω. Typical measured DC electrical
performance using Test Circuit A (Note 3).
SYMBOL PARAMETER
V
S
I
S,TOT
I
S,OUT
I
CC
Operating Supply Range
Total Supply Current
Total Supply Current to OUT Pins
Current to V
CC
Pin
All V
CC
Pins Plus +OUT and –OUT
l
DC ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
4.75
117
113
102.9
99
14.1
14.0
TYP
5.0
170
152
18
MAX
5.25
213
220
199
206
22.5
22.5
UNITS
V
mA
mA
mA
mA
mA
mA
Current to +OUT and –OUT
l
Either V
CC
Pin May Be Used
l
643020f
2
For more information
www.linear.com/LTC6430-20
LTC6430-20
AC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
Small Signal
BW
S11
S21
S12
S22
S21
OIP3
IM3
HD2
HD3
P1dB
NF
S21
OIP3
IM3
HD2
HD3
P1dB
NF
S21
OIP3
IM3
HD2
HD3
P1dB
NF
–3dB Bandwidth
Differential Input Match
Forward Differential Power Gain
Reverse Differential Isolation
Differential Output Match
Differential Power Gain
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
Differential Power Gain
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
Differential Power Gain
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
De-Embedded to Package for Balun Input Loss
De-Embedded to Package for Balun Input Loss
De-Embedded to Package
P
OUT
= 2dBm/Tone, Δf = 8MHz, Z
O
= 100Ω
P
OUT
= 2dBm/Tone, Δf = 8MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
De-Embedded to Package for Balun Input Loss
De-Embedded to Package
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
De-Embedded to Package (Low Frequency Cut-Off,
20MHz)
De-Embedded to Package, 25MHz to 2200MHz
De-Embedded to Package, 100MHz to 400MHz
De-Embedded to Package, 25MHz to 4000MHz
De-Embedded to Package, 25MHz to 1400MHz
De-Embedded to Package
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
2060
–10
20.8
–23
–10
21.1
47.9
45.9
–91.8
–87.8
–82.6
–93.1
23.0
2.9
20.9
48.0
46.0
–92.0
–88.0
–82.1
–94.9
23.3
2.9
20.8
51.0
47.0
–98.0
–90.0
–79.8
–80.9
23.9
2.9
MHz
dB
dB
dB
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
CONDITIONS
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
CC
= 5V, Z
SOURCE
= Z
LOAD
= 100Ω, unless otherwise noted (Note 3).
Measurements are performed using Test Circuit A, measuring from 50Ω SMA to 50Ω SMA without de-embedding (Note 4).
MIN
TYP
MAX
UNITS
Frequency = 50MHz
Frequency = 140MHz
Frequency = 240MHz
643020f
For more information
www.linear.com/LTC6430-20
3
LTC6430-20
AC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
Frequency = 300MHz
S21
OIP3
IM3
HD2
HD3
P1dB
NF
S21
OIP3
IM3
HD2
HD3
P1dB
NF
S21
OIP3
IM3
HD2
HD3
P1dB
NF
S21
OIP3
IM3
HD2
HD3
P1dB
NF
S21
Differential Power Gain
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
Differential Power Gain
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
Differential Power Gain
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
Differential Power Gain
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
Differential Power Gain
De-Embedded to Package for Balun Input Loss
De-Embedded to Package
De-Embedded to Package for Balun Input Loss
De-Embedded to Package
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
De-Embedded to Package for Balun Input Loss
De-Embedded to Package
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
De-Embedded to Package for Balun Input Loss
De-Embedded to Package
P
OUT
= 3dBm/Tone, Δf = 8MHz, Z
O
= 100Ω
P
OUT
= 3dBm/Tone, Δf = 8MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
CC
= 5V, Z
SOURCE
= Z
LOAD
= 100Ω, unless otherwise noted (Note 3).
Measurements are performed using Test Circuit A, measuring from 50Ω SMA to 50Ω SMA without de-embedding (Note 4).
CONDITIONS
De-Embedded to Package
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
MIN
TYP
20.8
50.1
47.1
–96.2
–90.2
–75.5
–77.2
24.7
3.0
19.6
44.8
–83.6
20.8
48.3
46.3
–90.6
–86.6
–70.3
–74.3
24.7
3.05
20.7
48.9
46.9
–93.8
–89.8
–68.9
–82.8
24.3
3.30
20.7
48.7
45.7
–93.4
–87.4
–65.9
–73.1
24.0
3.44
20.7
22.1
MAX
UNITS
dB
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
dB
643020f
Frequency = 380MHz
Frequency = 500MHz
Frequency = 600MHz
Frequency = 700MHz
4
For more information
www.linear.com/LTC6430-20
LTC6430-20
AC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
OIP3
IM3
HD2
HD3
P1dB
NF
S21
OIP3
IM3
HD2
HD3
P1dB
NF
S21
OIP3
IM3
HD2
HD3
P1dB
NF
S21
OIP3
IM3
HD2
HD3
P1dB
NF
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
Differential Power Gain
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
Differential Power Gain
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
Differential Power Gain
Output Third-Order Intercept Point
Third-Order Intermodulation
Second Harmonic Distortion
Third Harmonic Distortion
Output 1dB Compression Point
Noise Figure
De-Embedded to Package for Balun Input Loss
De-Embedded to Package for Balun Input Loss
De-Embedded to Package
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
De-Embedded to Package for Balun Input Loss
De-Embedded to Package
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
De-Embedded to Package for Balun Input Loss
De-Embedded to Package
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
CONDITIONS
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 2dBm/Tone, Δf = 1MHz, Z
O
= 100Ω
P
OUT
= 8dBm
P
OUT
= 8dBm
A-Grade
B-Grade
A-Grade
B-Grade
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
CC
= 5V, Z
SOURCE
= Z
LOAD
= 100Ω, unless otherwise noted (Note 3).
Measurements are performed using Test Circuit A, measuring from 50Ω SMA to 50Ω SMA without de-embedding (Note 4).
MIN
TYP
48.6
45.6
–93.2
–87.2
–58.0
–74.5
23.6
3.68
20.7
46.5
43.5
–89.0
–83.0
–51.4
–71.2
22.9
3.93
20.7
45.1
43.1
–86.2
–82.2
–48.9
–68.4
22.3
4.0
20.6
43.7
41.7
–83.4
–79.4
–55.2
–65.8
22.5
4.27
MAX
UNITS
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
dB
dBm
dBm
dBc
dBc
dBc
dBc
dBm
dB
Frequency = 800MHz
Frequency = 900MHz
Frequency = 1000MHz
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:
Guaranteed by design and characterization. This parameter is not tested.
Note 3:
The LTC6430-20 is guaranteed functional over the case operating
temperature range of –40°C to 85°C.
Note 4:
Small signal parameters S and noise are de-embedded to the
package pins, while large signal parameters are measured directly from the
test circuit.
643020f
For more information
www.linear.com/LTC6430-20
5
Embedded System
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