LTC4400-1/LTC4400-2
RF Power Controllers with
450kHz Loop BW and
45dB Dynamic Range
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FEATURES
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
DESCRIPTIO
RF Power Amplifier Control in ThinSOTTM Package
Internal Schottky Diode Detector with > 45dB Range
Wide Input Frequency Range:
300MHz to 2.7GHz (LTC4400-1)
300MHz to 2GHz (LTC4400-2)
Autozero Loop Cancels Offset Errors and
Temperature Dependent Offsets
Wide VCC Range: 2.7V to 6V
Automatic Bandwidth Control Improves Low Power
Ramp Response
Allows Direct Connection to Battery
RF Output Power Set by External DAC
Internal Frequency Compensation
Rail-to-Rail Power Control Output
Power Control Signal Overvoltage Protection
Low Operating Current: 1mA
Low Shutdown Current: 10µA
Two Pole PCTL Input Filtering
Low Profile (1mm) ThinSOT (LTC4400-1) and
8-Pin MSOP (LTC4400-2) Packages
The LTC®4400-1 is a SOT-23 RF power controller for fast
turn-on RF power amplifiers operating in the 300MHz to
2.7GHz range. Examples include the Hitachi PF08109B,
PF08122B, PF08123B, PF08107B and RF Micro Devices
RF3108. For slow turn-on RF power amplifiers refer to the
LTC4401-1/LTC4401-2.
RF power is controlled by driving the RF amplifier power
control pin and sensing the resultant RF output power via
a directional coupler or capacitive tap. The RF input
voltage is peak detected using an on-chip Schottky diode.
This detected voltage is compared to the DAC voltage at
the PCTL pin to control the output power. The RF power
amplifier is protected against high power control pin
voltages.
Internal and external offsets are cancelled over temperature by an autozero control loop, allowing accurate low
power programming. The shutdown feature disables the
part and reduces the supply current to 160mV
●
●
VPCTL = 2V Step, CLOAD = 100pF,
RLOAD = 400Ω (Note 3)
●
1.8
VPCA/B Droop
mA
V
VCC – 0.25
V
3.1
V
mA
3
V/µs
µV/ms
1
VPCA/B Start Voltage
Open Loop (Note 9)
●
270
BSEL, SHDN Input Threshold
VCC = 2.7V to 6V
●
0.35
BSEL, SHDN Input Current
BSEL = SHDN = 3.6V
●
16
PCTL Input Voltage Range
(Note 7)
●
0
●
60
PCTL Input Resistance
PCTL Input Filter
Autozero Range
2.5
1.9
0.05
450
24
90
550
mV
1.4
V
36
µA
2.4
V
120
kΩ
270
(Note 4)
●
kHz
400
mV
sn4400 4400fas
2
LTC4400-1/LTC4400-2
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 3.6V, SHDN = HI, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
MAX
UNITS
RF Input Frequency Range
LTC4400-1(Note 6)
LTC4400-2(Note 6)
300
300
2700
2000
MHz
MHz
RF Input Power Range
(LTC4400-1)
RF Frequency = 900MHz (Note 6)
RF Frequency = 1800MHz (Note 6)
RF Frequency = 2400MHz (Note 6)
RF Frequency = 2700MHz (Note 6)
–28
–26
–24
–22
18
18
16
16
dBm
dBm
dBm
dBm
RF Input Power Range
(LTC4400-2)
RF Frequency = 900MHz (Note 6)
RF Frequency = 2000MHz (Note 6)
–28
–26
18
18
dBm
dBm
RF Input Resistance
Referenced to VCC
350
Ω
150
●
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Specifications over the – 40°C to 85°C operating temperature range
are assured by design, characterization and correlation with statistical
process controls.
Note 3: Slew rate is measured open loop. The slew time at VPCA/B is
measured between 1V and 2V.
Note 4: Maximum DAC zero-scale offset voltage that can be applied to PCTL.
TYP
250
Note 5: This is the time from SHDN rising edge 50% switch point to
VPCA = 0.25V.
Note 6: Guaranteed by design. This parameter is not production tested.
Note 7: Includes maximum DAC offset voltage and maximum control
voltage.
Note 8: Bandwidth is calculated using the 10% to 90% rise time:
BW = 0.35/rise time
Note 9: Measured 12µs after SHDN = HI.
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10000
75°C
25°C
–30°C
1000
100
10
1
–28
–22 –16 –10 –4
2
8
RF INPUT POWER (dBm)
14
4401 G01
LTC4400-1 Detector Characteristics
at 1800MHz
10000
75°C
25°C
–30°C
1000
100
10
1
–26 –20
–14 –8
–2
4
10
RF INPUT POWER (dBm)
16
4401 G02
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
LTC4400-1 Detector Characteristics
at 900MHz
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
TYPICAL PERFOR A CE CHARACTERISTICS
LTC4400-1 Detector Characteristics
at 2400MHz
10000
75°C
25°C
–30°C
1000
100
10
1
–24 –20 –16 –12 –8 –4 0 4 8
RF INPUT POWER (dBm)
12 16
4401 G03
sn4400 4400fas
3
LTC4400-1/LTC4400-2
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10000
75°C
25°C
–30°C
1000
100
10
1
–22 –18 –14 –10 –6 –2 2 6
RF INPUT POWER (dBm)
10 14
LTC4400-2 Detector Characteristics
at 900MHz
10000
75°C
25°C
–30°C
1000
100
10
1
–28
–22 –16 –10 –4
2
8
RF INPUT POWER (dBm)
4401 G04
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PI FU CTIO S
14
4400 G05
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
LTC4400-1 Detector Characteristics
at 2700MHz
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
TYPICAL PERFOR A CE CHARACTERISTICS
LTC4400-2 Detector Characteristics
at 1800MHz
10000
75°C
25°C
–30°C
1000
100
10
1
–26 –20
–14 –8
–2
4
10
RF INPUT POWER (dBm)
16
4400 G06
(LTC4400-1/LTC4400-2)
RF (Pins 1/8): RF Feedback Voltage. This input is referenced
to VCC. The frequency range is 300MHz to 2700MHz for the
LTC4400-1 and 300MHz to 2000MHz for the LTC4400-2.
This pin has an internal 250Ω termination, an internal
Schottky diode detector and peak detector capacitor.
SHDN (Pins 4/6): Shutdown Input. A logic low on the SHDN
pin places the part in shutdown mode. A logic high places
the part in enable mode. SHDN has an internal 150k pulldown resistor to ensure that the part is in shutdown when
the drivers are in a three-state condition.
GND (Pins 2/4): System Ground.
VPCA (Pins 5/2): Power Control Voltage Output. This pin
drives an external RF power amplifier power control pin.
The maximum load capacitance is 100pF.
PCTL (Pins 3/5): Analog Input. The external power control
DAC drives this input. The amplifier servos the RF power
until the RF detected signal equals the DAC signal. The
input impedance is typically 90kΩ.
VPCB (Pin 3): (LTC4400-2 Only) Power Control Voltage
Output. This pin drives an external RF power amplifier
power control pin. The maximum load capacitance is
100pF.
VCC (Pins 6/1): Input Supply Voltage, 2.7V to 6V. VCC
should be bypassed with 0.1µF and 100pF ceramic capacitors. Used as return for RF 250Ω termination.
BSEL (Pin 7): (LTC4400-2 Only) Selects VPCA when Low
and VPCB when High. This input has an internal 150k
resistor to ground.
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4
LTC4400-1/LTC4400-2
W
BLOCK DIAGRA
(LTC4400-1)
68Ω
RF IN
33pF
RF PA
50Ω
Li-Ion
VCC
6
TXENB
AUTOZERO
–
AZ
+
+
–
GAIN
COMPRESSION
GM
+
250Ω
RF
1
+
–
30k
28pF
30k
60µA
GND
CLAMP
80mV
+
270kHz
FILTER
+
CC
5
BUFFER
38k
–
RF DET
VPCA
30k
–
60µA
22k
VREF
51k
30k
+
2
–
33.4k
6k
12Ω
TXENB
VBG
VREF
10µs
DELAY
CONTROL
150k
100Ω
LTC4400-1
4
3
4400-1 BD
PCTL
SHDN
NOTE: THE DIRECTIONAL COUPLER SHOWN IN THIS FIGURE MAY BE REPLACED
WITH A COUPLING CAPACITOR AND RESISTOR AS DESCRIBED IN APPLICATION
NOTE 91 “LOW COST COUPLING METHODS FOR RF POWER DETECTORS REPLACE
DIRECTIONAL COUPLERS”
sn4400 4400fas
5
LTC4400-1/LTC4400-2
W
BLOCK DIAGRA
(LTC4400-2)
0.4pF
50Ω
DIPLEXER
900MHz
RF PA
1.8GHz/1.9GHz
RF PA
Li-Ion
VCC
1
TXENB
AUTOZERO
–
AZ
+
+
–
GAIN
COMPRESSION
BUF A
GM
+
250Ω
RF
8
+
–
30k
28pF
30k
60µA
GND
80mV
+
MUX1
MUX2
CC
38k
–
RF DET
30k
–
60µA
22k
VREF
51k
30k
+
4
12Ω
33.4k
VPCB
100Ω
6k
TXENB
VREF
3
BUF B
–
VBG
VPCA
CLAMP
270kHz
FILTER
+
2
12Ω
10µs
DELAY
VPCA
CONTROL
100Ω
150k
150k
LTC4400-2
6
5
7
SHDN
PCTL
BSEL
4400-2 BD
sn4400 4400fas
6
LTC4400-1/LTC4400-2
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APPLICATIONS INFORMATION
Operation
The LTC4400-X RF power control amplifier integrates
several functions to provide RF power control over frequencies ranging from 300MHz to 2.7GHz. This product is
well suited to control RF power amplifiers that exhibit fast
turn-on times. The device also prevents damage to the RF
power amplifier due to overvoltage conditions. These
functions include an internally compensated power control amplifier to control the RF output power, an autozero
section to cancel internal and external voltage offsets, an
RF Schottky diode peak detector and amplifier to convert
the RF feedback signal to DC, a VPCA/B overvoltage clamp,
compression and a bandgap reference.
Band Selection
The LTC4400-2 is designed to drive two separate power
control lines. The BSEL pin will select VPCA when low and
VPCB when high. BSEL must be established prior to SHDN
being asserted high.
Control Amplifier
The control amplifier supplies the power control voltage to
the RF power amplifier. A portion (typically – 19dB for low
frequencies and –14dB for high frequencies) of the RF
output voltage is sampled, via a directional coupler or
capacitive tap, to close the gain control loop. When a DAC
voltage is applied to PCTL, the amplifier quickly servos
VPCA/B positive until the detected feedback voltage applied
to the RF pin matches the voltage at PCTL. This feedback
loop provides accurate RF power control. VPCA/B is capable
of driving a 6mA load current and 100pF load capacitor.
Control Amplifier Compression
The gain compression breakpoints are at PCTL = 80mV
and PCTL = 160mV. Above 160mV the gain does not
change. The compression changes the feedback attenuation these by reducing the loop gain.
power control loop. The RF pin input resistance is typically 250Ω and the frequency range of this pin is 300MHz
to 2700MHz for the LTC4400-1 and 300MHz to 2000MHz
for the LTC4400-2. The detector demonstrates excellent
efficiency over a wide range of input power. The Schottky
detector is biased at about 60µA and drives an on-chip
peak detector capacitor of 28pF.
Autozero
An autozero system is included to improve power programming accuracy over temperature. This section cancels internal offsets associated with the Schottky diode
detector and control amplifier. External offsets associated
with the DAC driving the PCTL pin are also cancelled.
Offset drift due to temperature is cancelled between each
burst. The maximum offset voltage allowed at the DAC
output is limited to 400mV. Autozeroing is performed
during a 10µs period after SHDN is asserted high. An
internal timer enables the VPCA/B output after 10µs. The
autozero capacitors are held and the VPCA/B pin is connected to the control amplifier output. The hold droop
voltage of typically < 1µV/ms provides for accurate offset
cancellation. The part should be shut down between
bursts or after multiple consecutive bursts.
Filter
There is a 270kHz two pole filter included in the PCTL path
to remove DAC noise.
Protection Features
The RF power amplifier control voltage pin is overvoltage
protected. The VPCA/B overvoltage clamp regulates
VPCA/B to 2.9V when the gain and PCTL input combination
attempts to exceed this voltage.
Modes of Operation
RF Detector
Shutdown: The part is in shutdown mode when SHDN is
low. VPCA/B is held at ground and the power supply current
is typically 10µA.
The internal RF Schottky diode peak detector and amplifier converts the RF feedback voltage to a low frequency
voltage. This voltage is compared to the DAC voltage at
the PCTL pin by the control amplifier to close the RF
Enable: When SHDN is asserted high the part will automatically calibrate out all offsets. This takes 160mV
sn4400 4400fas
10
LTC4400-1/LTC4400-2
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APPLICATIO S I FOR ATIO
Users should note very carefully the following factors
regarding this model: Model performance in general will
reflect typical baseline specs for a given device, and
certain aspects of performance may not be modeled fully.
While reasonable care has been taken in the preparation,
we cannot be responsible for correct application on any
and all computer systems. Model users are hereby notified
that these models are supplied “as is”, with no direct or
implied responsibility on the part of LTC for their operation
within a customer circuit or system. Further, Linear Technology Corporation reserves the right to change these
models without prior notice.
CONTROL
AMPLIFER
RF POWER AMP
+
CONTROLLED
RF OUTPUT
POWER
VPC
PCTL
G1
G2
–
IFB
LTC4400-X
H1
RF
H2
4400 F04
RF DETECTOR
The user agrees that this model is licensed from Linear
Technology and agrees that the model may be used,
loaned, given away or included in other model libraries as
long as this notice and the model in its entirety and
unchanged is included. No right to make derivative works
or modifications to the model is granted hereby. All such
rights are reserved.
This model is provided as is. Linear Technology makes
no warranty, either expressed or implied about the suitability or fitness of this model for any particular purpose.
In no event will Linear Technology be liable for special,
collateral, incidental or consequential damages in connection with or arising out of the use of this model. It
should be remembered that models are a simplification
of the actual circuit.
80
70
60
50
40
30
20
10
0
–10
–20
–30
–40
–50
–60
100
1k
180
RLOAD = 2k
160
CLOAD = 33pF
140
120
PHASE
100
80
60
GAIN
40
20
0
–20
–40
–60
–80
–100
10k
100k
1M
10M
FREQUENCY (Hz)
PHASE (DEG)
In all cases, the current data sheet information is your final
design guideline, and is the only performance guarantee.
For further technical information, refer to individual device
data sheets. Your feedback and suggestions on this model
is appreciated.
Linear Technology Corporation hereby grants the users of
this model a nonexclusive, nontransferable license to use
this model under the following conditions:
VOLTAGE GAIN (dB)
This model (Figure 6) is being supplied to LTC users as an
aid to circuit designs. While the model reflects reasonably
close similarity to corresponding devices in low frequency
AC performance terms, its use is not suggested as a
replacement for breadboarding. Simulation should be
used as a forerunner or a supplement to traditional lab
testing.
4400 F05
RF COUPLER
14dB to 20dB LOSS
Figure 4. Closed-Loop Block Diagram
Figure 5. SPICE Model Open-Loop Gain and Phase
Characteristics from RF to VPCA, PCTL < 80mV
sn4400 4400fas
11
LTC4400-1/LTC4400-2
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APPLICATIO S I FOR ATIO
*LTC4400-X Low Frequency AC Spice Model*
*July 11, 2001
*Main Network Description
GGIN1 ND3 0 ND2 IFB 86E-6
GGXFB IFB 0 0 ND12 33E-6
GGX5 ND11 0 0 ND10 1E-6
GGX6 ND12 0 0 ND11 1E-6
GGX1 ND4 0 0 ND3 1E-6
GGX2 ND6 0 0 ND4 1E-6
GGX3 ND7 0 0 ND6 1E-6
GGX4 ND8 0 0 ND7 1E-6
EEX1 ND9 0 0 ND8 2
CCC1 ND3 0 44E-12
CCPCTL2 ND2 0 7E-12
CCPCTL1 ND1 0 13E-12
CCLINT VPCA 0 5E-12
CCLOAD VPCA 0 33E-12
CCFB1 IFB 0 2.4E-12
CCX5 ND11 0 16E-15
CCX6 ND12 0 1.2E-15
CCP ND10 0 28E-12
CCX2 ND6 0 8E-15
CCX3 ND7 0 32E-15
LLX1 ND5 0 80E-3
RR01 ND3 0 20E6
RRFILT ND2 ND1 44E3
RRPCTL1 PCTL ND1 51E3
RRPCTL2 ND1 0 38E3
RR9 VPCA ND9 50
RRLOAD VPCA 0 2E3
RRFB1 IFB 0 22E3
RRT RF 0 250
RRX5 ND11 0 1E6
RRX6 ND12 0 1E6
RRSDRF ND10 500
RRX1 ND4 ND5 1E6
RRX2 ND6 0 1E6
RRX3 ND7 0 1E6
RRX4 ND8 0 1E6
**Closed-loop feedback, comment-out VPCTLO, VRF, Adjust EFB gain to reflect external gain, currently set at 3X**
*EFB RF 0 VPCA VIN 3
*VIN VIN 0 DC 0 AC 1
*VPCTLO PCTL 0 DC 0
**Open-loop connections, comment-out EFB, VIN and VPCTLO******
VPCTLO PCTL 0 DC 0
VRF RF 0 DC 0 AC 1
******Add AC statement and print statement as required***
.AC DEC 50 100 1E7
*****for PSPICE only*****
.OP
.PROBE
*************************
.END
Figure 6. LTC4400-X Low Frequency AC SPICE Model
sn4400 4400fas
12
LTC4400-1/LTC4400-2
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APPLICATIO S I FOR ATIO
PCTL
RPCTL1
51E3
ND3
ND1
CPCTL1
13E-12
ND2
+
RFILT
44E3
RPCTL2
38E3 C
PCTL2
7E-12
–
86E-6
GX1
+
RO1
20E6
GM
ND6
ND4
GIN1
GM
–
CC1
44E-12
1E-6
RX1
1E6
ND5
GX2
+
LX1
80E-3
–
+
RX2
1E6
GM
1E-6
–
IFB
1E-6
GX4
+
RX3
1E6
GM
CX2
8E-15
ND8
ND7
GX3
RX4
1E6
GM
–
CX3
32E-15
1E-6
ND8
2X BUFFER
RF
ND11
RT
250Ω
RX5
1E6
GM
ND10
CP
28E-12
GX5
+
RSD
500Ω
–
1E-6
ND12
RX6
1E6
GM
–
CX5
16E-15
GX6
+
1E-6
33E-6
EX1
+
RFB1
22E3
GM
–
CX6
1.2E-15
GXFB
+
R9
50Ω
VAMP
CFB1
2.4E-12
–
2
CLINT
5E-12
ND9
VPCA
RLOAD
2E3
CLOAD
33E-12
4400 F07
Figure 7. LTC4400-X Low Frequency AC Model
sn4400 4400fas
13
LTC4400-1/LTC4400-2
U
PACKAGE DESCRIPTIO
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636)
0.62
MAX
2.90 BSC
(NOTE 4)
0.95
REF
1.22 REF
3.85 MAX 2.62 REF
1.4 MIN
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45
6 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
0.01 – 0.10
1.00 MAX
DATUM ‘A’
0.30 – 0.50 REF
0.09 – 0.20
(NOTE 3)
1.90 BSC
S6 TSOT-23 0302
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
sn4400 4400fas
14
LTC4400-1/LTC4400-2
U
PACKAGE DESCRIPTIO
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.889 ± 0.127
(.035 ± .005)
5.23
(.206)
MIN
3.2 – 3.45
(.126 – .136)
0.42 ± 0.04
(.0165 ± .0015)
TYP
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.65
(.0256)
BSC
8
7 6 5
0.52
(.206)
REF
RECOMMENDED SOLDER PAD LAYOUT
0.254
(.010)
3.00 ± 0.102
(.118 ± .004)
NOTE 4
4.90 ± 0.15
(1.93 ± .006)
DETAIL “A”
0° – 6° TYP
GAUGE PLANE
0.53 ± 0.015
(.021 ± .006)
DETAIL “A”
1
2 3
4
1.10
(.043)
MAX
0.86
(.034)
REF
0.18
(.077)
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP
0.65
(.0256)
BSC
0.13 ± 0.076
(.005 ± .003)
MSOP (MS8) 0802
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
sn4400 4400fas
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
LTC4400-1/LTC4400-2
U
TYPICAL APPLICATION
LTC4400-2 Dual Band Cellular Telephone Transmitter
68Ω
33pF
LTC4400-2
VIN
VCC
RF
Li-Ion SHDN
SHDN
VPCA
BSEL
BSEL
VPCB
GND
PCTL
0.1µF
900MHz
DIRECTIONAL
COUPLER
DIPLEXER
RF PA
50Ω
DAC
1.8GHz/
1.9GHz
RF PA
4400 TA03
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400MHz Quadrature IF Demodulator with
RSSI
70MHz to 400MHz IF, 1.8V ≤ VSUPPLY ≤ 5.25V, 84dBm Limiting Gain,
90dB RSSI Range
LT5503
1.2GHz to 2.7GHz Direct IQ Modulator with
Mixer
Direct IQ Modulator with Integrated 90° Phase Shifter, 4-Step RF Power Control,
1.8V ≤ VSUPPLY ≤ 5.25V
LT5504
800MHz to 2.7GHz RF Measuring Receiver
80dB Dynamic Range, Temperature Compensated, 2.7V to 5.5V Supply
LTC5505
300MHz to 3.5GHz RF Power Detector
>40dB Dynamic Range, Temperature Compensated, 2.7V to 6V Supply
LTC5507
100kHz to 1GHz RF Power Detector
40dB Dynamic Range, Temperature Compensated, 2.7V to 6V Supply
LTC5508
300MHz to 7GHz RF Power Detector
40dB Dynamic Range, 2.7V to 6V Supply, SC70 Package
LT5511
High Signal Level Up Converting Mixer
RF Output to 3GHz, 17dBm IIP3, Integrated LO Buffer
LT5512
High Signal Level Down Converting Mixer
DC-3GHz RF Input, 20dBm IIP3, Integrated LO Buffer
®
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Linear Technology Corporation
LT/TP 0403 1K REV A • PRINTED IN THE USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2001
