LTC4402-1 LINER [Linear Technology], LTC4402-1 Datasheet

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LTC4402-1

Manufacturer Part Number
LTC4402-1
Description
Multiband RF Power Controllers for EDGE/TDMA
Manufacturer
LINER [Linear Technology]
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC4402-1EMS8
Manufacturer:
LT
Quantity:
10 000
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Supports AM Modulation in EDGE/TDMA (ANSI-136)
Applications
Single Output RF Power Amplifier Control
(LTC4402-1)
Dual Output RF Power Amplifier Control (LTC4402-2)
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
450kHz Loop Bandwidth
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: < 10 A
PCTL Input Filter
Available in a 8-Pin MSOP Package (LTC4402-1)
and 10-Pin MSOP (LTC4402-2)
Multiband GSM/GPRS/EDGE Cellular Phones
PCS Devices
Wireless Data Modems
U.S. TDMA Cellular Phones
IN
Range: 2.7V to 6V
Li-Ion
U
DAC
0.1 F
V
SHDN
LTC4402-2 Multiband EDGE Cellular Telephone Transmitter
BSEL
HOLD
U
1
9
8
7
6
V
BSEL
V
SHDN
PCTL
IN
HOLD
LTC4402-2
V
V
GND
GND
PCA
PCB
RF
10
2
3
4
5
850MHz/
900MHz
1.8GHz /
DESCRIPTIO
1.9GHz
The LTC
RF power amplifiers operating in the 300MHz to 2.4GHz
range. The LTC4402-2 has two outputs to control dual T
PA modules with two control inputs. An internal sample
and hold circuit enables the LTC4402-2 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 LTC4402-1 is a single output RF power controller
with identical performance to the LTC4402-2. The
LTC4402-1 has one output to control a single T
dual T
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
< 10 A.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Controllers for EDGE/TDMA
X
®
PA module with a single control input and is
RF PA
RF PA
4402-2 is a multiband RF power controller for
LTC4402-1/LTC4402-2
50
Multiband RF Power
U
DIPLEXER
4402 TA01
0.4pF
0.05pF
X
PA or
1
4402f
X

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LTC4402-1 Summary of contents

Page 1

... Schottky diode. This detected voltage is compared to the DAC voltage at the PCTL pin to control the output power. The LTC4402 single output RF power controller with identical performance to the LTC4402-2. The LTC4402-1 has one output to control a single T dual T PA module with a single control input and is X available in an 8-pin MSOP package ...

Page 2

... Maximum Junction Temperature ........................ 125 C IN Lead Temperature (Soldering, 10 sec)................ 300 C + 0.3V ORDER PART NUMBER PCA LTC4402-1EMS8 V 3 PCB GND 4 GND 5 MS8 PART MARKING 10-LEAD PLASTIC MSOP T LTXF JMAX The denotes specifications which apply over the full operating = ...

Page 3

... PCB IN 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. LTC4402-1/LTC4402-2 MIN TYP MAX 270 400 300 2400 – ...

Page 4

... LTC4402-1/LTC4402 CTIO S (LTC4402-1/LTC4402-2) GND (Pin 4/5): System Ground. PCTL (Pin 5/6): 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 applied at this pin. SHDN (Pin 6/7): Shutdown Input. A logic low on the SHDN pin places the part in shutdown mode ...

Page 5

... PCB PCA an 850MHz/900MHz channel and V channel. BSEL must be established before the part is enabled. The LTC4402-1 can be used to drive a single RF channel or dual channel with integral multiplexer. Control Amplifier The control amplifier supplies the power control voltage to the RF power amplifier. A portion (typically – 19dB for low frequencies and – ...

Page 6

... LTC4402-1 Description The LTC4402-1 is identical in performance to the LTC4402-2 except that only one control output (V available. The LTC4402-1 can drive a single band (300MHz to 2400MHz dual RF channel module with an internal multiplexer. Several manufacturers offer dual RF channel modules with an internal multiplexer. ...

Page 7

... The range of decoupling capacitor values is typically 1nF to 3 Poor layout techniques associated with the coupler network may result in high frequency signals bypassing the coupler. This could result in stability problems due to the reduction in the coupler loss. LTC4402-1/LTC4402-2 conditions. The oscillation fre- SWR 4402f 7 ...

Page 8

... LTC4402-1/LTC4402 APPLICATIO S I FOR ATIO Determining External Loop Gain and Bandwidth The external loop voltage gain contributed by the RF chan- nel and coupler network should be measured in a closed loop configuration. A voltage step is applied to PCTL and the change measured. The detected RF ...

Page 9

... In no event will Linear Technology be liable for special, collat- eral, 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. LTC4402-1/LTC4402-2 4402f 9 ...

Page 10

... LTC4402-1/LTC4402 APPLICATIO S I FOR ATIO *LTC4402-X Low Frequency AC Spice Model* *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 ...

Page 11

... TYP 0.53 0.152 (.021 .006) 1.10 (.043) DETAIL “A” MAX SEATING PLANE 0.17 – 0.27 (.007 – .011) 0.50 TYP (.0197) BSC LTC4402-1/LTC4402 POWER MODULE 33pF Li-Ion LTC4402-1 WITH MUX OUT1 900MHz PCA HOLD HOLD 3 6 PWR ...

Page 12

... LTC4402-1/LTC4402-2 RELATED PARTS PART NUMBER DESCRIPTION LTC1261 Regulated Inductorless Voltage Inverter LTC1732 Li-Ion Linear Charger TM LTC1734/ ThinSOT Li-Ion Battery Charger LTC1734L LTC1754 ThinSOT Charge Pump LTC1757A RF Power Controller LTC1758 RF Power Controller LTC1957 RF Power Controller LTC4052 Li-Ion Pulse Charger LTC4400 SOT- Controller ...

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