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LTC4403-1EMS8#PBF

P1-P3P4-P6P7-P9P10-P12
1
LTC4403-1/LTC4403-2
4403f
Multiband RF Power
Controllers for EDGE/TDMA
The LTC
®
4403-2 is a multiband RF power controller for
RF power amplifiers operating in the 300MHz to 2.4GHz
range. The LTC4403-2 has two outputs to control dual T
X
PA modules with two control inputs. An internal sample
and hold circuit enables the LTC4403-2 to be used with
AM modulation via the carrier or PA supply. The input
voltage range is optimized for operation from a single
lithium-ion cell or 3× NiMH.
RF power is controlled by driving the RF amplifier power
control pins and sensing the resultant RF output power.
The RF sense 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 LTC4403-1 is a single output RF power controller
with identical performance to the LTC4403-2. The
LTC4403-1 has one output to control a single T
X
PA or
dual T
X
PA module with a single control input and is
available in an 8-pin MSOP package.
Internal and external offsets are cancelled over tempera-
ture by an autozero control loop. The shutdown feature
disables the part and reduces the supply current to
<10µA.
■
Supports AM Modulation in EDGE/TDMA (ANSI-136)
Applications
■
Single Output RF Power Amplifier Control
(LTC4403-1)
■
Dual Output RF Power Amplifier Control (LTC4403-2)
■
Internal Schottky Diode Detector with >40dB Range
■
Wide Input Frequency Range: 300MHz to 2.4GHz
■
Autozero Loop Cancels Offset Errors and
Temperature Dependent Offsets
■
Wide V
IN
Range: 2.7V to 6V
■
Allows Direct Connection to Battery
■
RF Output Power Set by External DAC
■
Internal Frequency Compensation
■
Rail-to-Rail Power Control Outputs
■
Low Operating Current: 1mA
■
Low Shutdown Current: <10µA
■
PCTL Input Filter
■
Available in a 8-Pin MSOP Package (LTC4403-1)
and 10-Pin MSOP (LTC4403-2)
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTC4403-2 Multiband EDGE Cellular Telephone Transmitter
■
Multiband GSM/GPRS/EDGE Cellular
Telephones
■
PCS Devices
■
Wireless Data Modems
■
U.S. TDMA Cellular Phones
V
IN
BSEL
V
HOLD
SHDN
PCTL
1
9
8
7
6
10
2
3
4
5
RF
V
PCA
V
PCB
GND
GND
LTC4403-2
0.4pF
± 0.05pF
Li-Ion
SHDN
BSEL
850MHz/
900MHz
DAC
RF PA
DIPLEXER
1.8GHz/
1.9GHz
RF PA
50Ω
4403 TA01
V
HOLD
0.1µF
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
2
LTC4403-1/LTC4403-2
4403f
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Voltage ● 2.7 6 V
I
VIN
Shutdown Current SHDN = 0V ● 10 20 µA
I
VIN
Operating Current I
VPCA
= I
VPCB
= 0mA ● 1.5 2 mA
V
PCA/B
V
OL
R
LOAD
= 400Ω, Enabled ● 0 0.1 V
V
PCA/B
Dropout Voltage I
LOAD
= 6mA, V
IN
= 2.7V ● V
IN
– 0.25 V
V
PCA/B
Output Current V
PCA/B
= 2.4V, V
IN
= 2.7V, ∆V
OUT
= 10mV ● 6mA
V
PCA/B
Enable Time SHDN = High (Note 5) ● 911µs
V
PCA/B
Bandwidth C
LOAD
= 33pF, R
LOAD
= 400 (Note 7) PCTL < 80mV 250 kHz
PCTL > 160mV 130 kHz
V
PCA/B
Load Capacitance (Note 6) ● 100 pF
V
PCA/B
Slew Rate V
PCTL
= 2V Step, C
LOAD
= 100pF, R
LOAD
= 400 (Note 3) 1.4 V/µs
V
PCA/B
V
HOLD
Droop Unity Gain, V
PCTL
= 2V, V
HOLD
= High 1 µV/ms
V
HOLD
Time Time from V
HOLD
High to Hold Switch Opening 100 ns
V
PCA/B
Start Voltage Open Loop ● 250 450 550 mV
V
PCA/B
Voltage Clamp PCTL = 1V, V
IN
= 5V ● 3.6 4 4.4 V
SHDN, V
HOLD
, BSEL Input Threshold Low V
IN
= 2.7V to 6V ● 0.35 V
SHDN, V
HOLD
, BSEL Input Threshold High V
IN
= 2.7V to 6V ● 1.4 V
SHDN, BSEL, V
HOLD
Input Current SHDN, BSEL, V
HOLD
= V
IN
= 3.6V ● 16 24 36 µA
PCTL Input Voltage Range (Note 4) ● 0 2.4 V
PCTL Input Resistance ● 60 90 120 kΩ
V
IN
to GND............................................... –0.3V to 6.5V
V
PCA
, V
PCB
Voltage .................................. –0.3V to 4.6V
PCTL Voltage ............................... –0.3V to (V
IN
+ 0.3V)
RF Voltage ........................................ (V
IN
± 2.6V) to 7V
SHDN, V
HOLD
, BSEL Voltage
to GND......................................... –0.3V to (V
IN
+ 0.3V)
ORDER PART
NUMBER
MS PART MARKING
LTC4403-2EMS
LTXJ
T
JMAX
= 125°C, θ
JA
= 160°C/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
MS8 PART MARKING
LTC4403-1EMS8
LTXG
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.6V, SHDN = V
IN
unless otherwise noted.
T
JMAX
= 125°C, θ
JA
= 160°C/W
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
ELECTRICAL CHARACTERISTICS
Consult LTC Marketing for parts specified with wider operating temperature ranges.
1
2
3
4
V
IN
V
PCA
GND
GND
8
7
6
5
RF
V
HOLD
SHDN
PCTL
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
1
2
3
4
5
V
IN
V
PCA
V
PCB
GND
GND
10
9
8
7
6
RF
BSEL
V
HOLD
SHDN
PCTL
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
3
LTC4403-1/LTC4403-2
4403f
PARAMETER CONDITIONS MIN TYP MAX UNITS
PCTL Input Filter 270 kHz
Autozero Range Maximum DAC Zero-Scale Offset Voltage ● 400 mV
that can be applied to PCTL
RF Input Frequency Range (Note 6) ● 300 2400 MHz
RF Input Power Range F = 900MHz (Note 6) –27 to 18 dBm
F = 1800MHz (Note 6) –25 to 18 dBm
F = 2400MHz (Note 6) –23 to 16 dBm
RF Input Resistance Referenced to V
IN
● 150 250 350 Ω
E
LECTR
IC
AL C CHARA TERIST
ICS
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.6V, SHDN = V
IN
, unless otherwise noted.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Specifications are assured over the –40°C to 85°C temperature
range by design characterization and correlation with statistical process
controls.
Note 3: Slew rate is measured open loop. The rise time at V
PCA
or V
PCB
is
measured between 1V and 2V.
Note 4: Includes maximum DAC offset voltage and maximum control
voltage.
Note 5: This is the time from SHDN rising edge 50% switch point to
V
PCA/B
= 250mV.
Note 6: Guaranteed by design. This parameter is not production tested.
Note 7: Bandwidth is calculated using the 10% to 90% rise time:
BW = 0.35/rise time
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Detector Characteristics at 900MHz
Detector Characteristics at 1800MHz
V
IN
(Pin 1): Input Supply Voltage, 2.7V to 6V. V
IN
should
be bypassed with 0.1µF and 100pF ceramic capacitors.
V
PCA
(Pin 2): Power Control Voltage Output. This pin
drives an external RF power amplifier power control pin.
The maximum load capacitance is 100pF. The output is
capable of rail-to-rail swings at low load currents. Selected
when BSEL is low.
(LTC4403-1/LTC4403-2)
UU
U
PI FU CTIO S
V
PCB
(Pin 3): (LTC4403-2 Only) Power Control Voltage
Output. This pin drives an external RF power amplifier
power control pin. The maximum load capacitance is
100pF. The output is capable of rail-to-rail swings at low
load currents. Selected when BSEL is high.
GND (Pin 3/4): System Ground.
RF INPUT POWER (dBm)
10
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
100
1000
10000
–26 –14 –8 –2 4 10
1
–20
16
4403 G01
0.9GHz AT –30°C
0.9GHz AT 75°C
0.9GHz
AT 25°C
RF INPUT POWER (dBm)
10
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
100
1000
10000
–26 –14 –8 –2 4 10
1
–20
16
4403 G02
1.8GHz AT –30°C
1.8GHz AT 75°C
1.8GHz
AT 25°C
RF INPUT POWER (dBm)
10
PCTL REFERENCED DETECTOR OUTPUT VOLTAGE (mV)
100
1000
10000
–14 –8 –2 4 10
1
–20
16
4403 G03
2.4GHz AT –30°C
2.4GHz AT 75°C
2.4GHz AT 25°C
Detector Characteristics at 2400MHz
P1-P3P4-P6P7-P9P10-P12

LTC4403-1EMS8#PBF

Mfr. #:
Buy LTC4403-1EMS8#PBF
Manufacturer:
Analog Devices Inc.
Description:
RF Detector Multiband RF Power Controller
Lifecycle:
New from this manufacturer.
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