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LTC4400-1ES6#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LTC4400-1/LTC4400-2
sn4400 4400fas
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
RF Power Controllers with
450kHz Loop BW and
45dB Dynamic Range
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 tempera-
ture by an autozero control loop, allowing accurate low
power programming. The shutdown feature disables the
part and reduces the supply current to <10µA.
A dual control channel version (LTC4400-2) is also
available in an 8-pin MSOP package.
■
RF Power Amplifier Control in ThinSOT
TM
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 V
CC
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
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTC4400-1 Dual Band Cellular Telephone Transmitter
■
GSM/GPRS Cellular Telephones
■
PCS Devices
■
Wireless Data Modems
■
U.S. TDMA Cellular Phones
V
CC
SHDN
PCTL
1
5
2
6
4
3
RF
V
PCA
GND
LTC4400-1
SHDN
DAC
1.8GHz
INPUT
900MHz
INPUT
4400 TA01
0.1µF
0.4pF
50Ω
Li-Ion
V
PC
900MHz
OUTPUT
1.8GHz
OUTPUT
PA MODULE
BAND
SELECT
ThinSOT is a trademark of Linear Technology Corporation.
RF INPUT POWER (dBm)
10
PCTL REFERENCED DETECTOR
OUTPUT VOLTAGE (mV)
100
1000
10000
–26 –22–18 –14 –10 –6 –2 2 6 10 14 18
1
4400 TA04
T
A
= 25°C
V
CC
= 3.6V
900MHz
1800MHz
LTC4400-1 Detector Characteristics at
900MHz and 1800MHz
2
LTC4400-1/LTC4400-2
sn4400 4400fas
ABSOLUTE AXI U RATI GS
WWWU
V
CC
to GND .............................................. –0.3V to 6.5V
V
PCA/B
Voltage to GND ............................ –0.3V to 3.2V
PCTL Voltage to GND ................. –0.3V to (V
CC
+ 0.3V)
RF Voltage to GND............................ (V
CC
– 2.6V) to 7V
BSEL, SHDN Voltage to GND ...... –0.3V to (V
CC
+ 0.3V)
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.6V, SHDN = HI, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
PACKAGE/ORDER I FOR ATIO
UU
W
I
VPCA/B
.................................................................. 10mA
Operating Temperature Range (Note 2) .. –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Maximum Junction Temperature ........................ 125°C
Lead Temperature (Soldering, 10 sec)................ 300°C
(Note 1)
ORDER PART
NUMBER
S6 PART MARKING
LTC4400-1ES6
LTWZ
T
JMAX
= 125°C, θ
JA
= 230°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
1
2
3
4
V
CC
V
PCA
V
PCB
GND
8
7
6
5
RF
BSEL
SHDN
PCTL
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
ORDER PART
NUMBER
MS8 PART MARKING
LTC4400-2EMS8
LTXB
T
JMAX
= 125°C, θ
JA
= 250°C/W
RF 1
GND 2
PCTL 3
6 V
CC
5 V
PCA
4 SHDN
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Operating Voltage ● 2.7 6 V
I
VCC
Shutdown Current SHDN = 0V ● 10 20 µA
I
VCC
Operating Current SHDN = HI, I
VPCA/B
= 0mA ● 1.2 1.9 mA
V
PCA/B
V
OL
R
LOAD
= 400Ω, Enabled ● 0 0.05 V
V
PCA/B
Dropout Voltage I
LOAD
= 6mA, V
CC
= 2.7V ● V
CC
– 0.25 V
V
PCA/B
Voltage Clamp PCTL = 1V ● 2.7 2.9 3.1 V
V
PCA/B
Output Current V
PCA/B
= 2.4V, V
CC
= 3V ● 710 mA
V
PCA/B
Enable Time SHDN = V
CC
(Note 5) ● 9 10.2 µs
V
PCA/B
Bandwidth C
LOAD
= 100pF, R
LOAD
= 400Ω (Note 8) PCTL < 80mV ● 350 450 560 kHz
PCTL > 160mV 230 kHz
V
PCA/B
Load Capacitance ● 100 pF
V
PCA/B
Slew Rate V
PCTL
= 2V Step, C
LOAD
= 100pF, ● 1.8 2.5 3 V/µs
R
LOAD
= 400Ω (Note 3)
V
PCA/B
Droop 1 µV/ms
V
PCA/B
Start Voltage Open Loop (Note 9) ● 270 450 550 mV
BSEL, SHDN Input Threshold V
CC
= 2.7V to 6V ● 0.35 1.4 V
BSEL, SHDN Input Current BSEL = SHDN = 3.6V ● 16 24 36 µA
PCTL Input Voltage Range (Note 7) ● 0 2.4 V
PCTL Input Resistance ● 60 90 120 kΩ
PCTL Input Filter 270 kHz
Autozero Range (Note 4) ● 400 mV
3
LTC4400-1/LTC4400-2
sn4400 4400fas
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC4400-1 Detector Characteristics
at 900MHz
LTC4400-1 Detector Characteristics
at 1800MHz
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 V
PCA/B
is
measured between 1V and 2V.
Note 4: Maximum DAC zero-scale offset voltage that can be applied to PCTL.
Note 5: This is the time from SHDN rising edge 50% switch point to
V
PCA
= 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.
RF INPUT POWER (dBm)
10
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
100
1000
10000
–28 –10 2 8
1
–22 –4 14–16
4401 G01
75°C
25°C
–30°C
RF INPUT POWER (dBm)
10
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
100
1000
10000
–26 –14 –8 –2 4 10 16
1
–20
4401 G02
75°C
25°C
–30°C
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
RF Input Frequency Range LTC4400-1(Note 6) 300 2700 MHz
LTC4400-2(Note 6) 300 2000 MHz
RF Input Power Range RF Frequency = 900MHz (Note 6) –28 18 dBm
(LTC4400-1) RF Frequency = 1800MHz (Note 6) –26 18 dBm
RF Frequency = 2400MHz (Note 6) –24 16 dBm
RF Frequency = 2700MHz (Note 6) –22 16 dBm
RF Input Power Range RF Frequency = 900MHz (Note 6) –28 18 dBm
(LTC4400-2) RF Frequency = 2000MHz (Note 6) –26 18 dBm
RF Input Resistance Referenced to V
CC
● 150 250 350 Ω
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.6V, SHDN = HI, unless otherwise noted.
LTC4400-1 Detector Characteristics
at 2400MHz
RF INPUT POWER (dBm)
10
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
100
1000
10000
–24 –12 –8 –4 40 8 12 16
1
–20 –16
4401 G03
75°C
25°C
–30°C
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC4400-1ES6#TRMPBF

Mfr. #:
Buy LTC4400-1ES6#TRMPBF
Manufacturer:
Analog Devices Inc.
Description:
RF Detector ThinSOT RF Power Detector & Controller
Lifecycle:
New from this manufacturer.
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