LTC4400-2 Linear Technology, LTC4400-2 Datasheet
LTC4400-2
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LTC4400-2 Summary of contents
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... The shutdown feature disables the part and reduces the supply current to < dual control channel version (LTC4400-2) is also available in an 8-pin MSOP package. , LTC and LT are registered trademarks of Linear Technology Corporation. ...
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... SHDN = HI, unless otherwise noted 0mA VPCA (Note 400 (Note 8) PCTL < 80mV LOAD PCTL > 160mV = 100pF, LOAD www.DataSheet4U.com ORDER PART NUMBER TOP VIEW BSEL LTC4400-2EMS8 6 SHDN 5 PCTL MS8 PART MARKING = 250 C/W JA LTXB MIN TYP MAX 2 1.2 1.9 0 0.05 V – 0.25 CC 2.7 2.9 3 ...
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... ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER CONDITIONS RF Input Frequency Range LTC4400-1(Note 6) LTC4400-2(Note 6) RF Input Power Range RF Frequency = 900MHz (Note 6) (LTC4400-1) RF Frequency = 1800MHz (Note 6) RF Frequency = 2400MHz (Note 6) RF Frequency = 2700MHz (Note 6) RF Input Power Range RF Frequency = 900MHz (Note 6) ...
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... RF (Pins 1/8): RF Feedback Voltage. This input is referenced The frequency range is 300MHz to 2700MHz for the CC LTC4400-1 and 300MHz to 2000MHz for the LTC4400-2. This pin has an internal 250 termination, an internal Schottky diode detector and peak detector capacitor. GND (Pins 2/4): System Ground. PCTL (Pins 3/5): Analog Input. The external power control DAC drives this input ...
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... Li-Ion AUTOZERO GAIN COMPRESSION + 80mV – 270kHz FILTER + 38k RF DET – V 22k REF 51k 33.4k TXENB 10 s DELAY 150k 4 3 SHDN PCTL LTC4400-1/LTC4400-2 www.DataSheet4U.com 50 TXENB – – CLAMP + C BUFFER C – 30k 30k + – 100 CONTROL LTC4400 PCA ...
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... FILTER 38k V + 22k REF 51k – 33.4k 6k TXENB CONTROL 150k 5 7 PCTL BSEL www.DataSheet4U.com 1.8GHz/1.9GHz BUF A CLAMP + MUX1 MUX2 C C – 30k 30k 12 BUF B 100 12 V PCA 100 LTC4400 PCA 3 V PCB 4400-2 BD sn4400 4400fas ...
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... RF Schottky diode peak detector and amplifier to convert the RF feedback signal to DC PCA/B compression and a bandgap reference. Band Selection The LTC4400-2 is designed to drive two separate power control lines. The BSEL pin will select V V when high. BSEL must be established prior to SHDN PCB being asserted high ...
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... T5: BASEBAND CONTROLLER STARTS RF POWER RAMP DOWN AT END OF BURST T6: LTC4400-X RETURNS TO SHUTDOWN MODE BETWEEN BURSTS T7: BSEL CHANGE PRIOR TO SHDN, 0ns TYPICAL (LTC4400-2 ONLY) T8: BSEL CHANGE AFTER TO SHDN, 0ns TYPICAL (LTC4400-2 ONLY) General Layout Considerations The LTC4400-X should be placed near the coupling com- ponents ...
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... F. 5) Poor layout techniques associated with the RF coupling components may result in high frequency signals bypass- ing the coupler. This could result in stability problems due to the reduction in the coupler loss. LTC4400-1/LTC4400-2 www.DataSheet4U.com conditions. The oscillation fre- SWR sn4400 4400fas ...
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... LTC4400-1/LTC4400 APPLICATIO S I FOR ATIO Determining External Loop Gain and Bandwidth The external loop voltage gain contributed by the RF chan- nel and RF feedback coupling network should be mea- sured in a closed-loop configuration. A voltage step is applied to PCTL and the change in V detected voltage is K • PCTL, where K is the internal gain ...
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... It should be remembered that models are a simplification of the actual circuit. CONTROLLED RF OUTPUT POWER 4400 F04 Figure 5. SPICE Model Open-Loop Gain and Phase Characteristics from LTC4400-1/LTC4400-2 www.DataSheet4U.com 80 180 LOAD 70 160 C ...
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... LTC4400-1/LTC4400 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 ...
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... ND5 – – LX1 1E-6 1E-6 CC1 80E-3 ND11 ND12 GX6 GXFB + + RX6 GM 1E6 GM – – 1E-6 33E-6 CX6 1.2E-15 Figure 7. LTC4400-X Low Frequency AC Model LTC4400-1/LTC4400-2 www.DataSheet4U.com ND6 ND7 GX3 GX4 + + RX2 RX3 GM GM 1E6 1E6 – – 1E-6 1E-6 CX2 CX3 8E-15 32E-15 ND8 IFB 2X BUFFER ...
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... LTC4400-1/LTC4400-2 PACKAGE DESCRIPTIO 0.62 0.95 MAX REF 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF 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 ...
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... BSC 4.90 0.15 DETAIL “A” (1.93 .006) 0 – 6 TYP 0.53 0.015 1.10 (.021 .006) (.043) DETAIL “A” MAX SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP LTC4400-1/LTC4400-2 www.DataSheet4U.com 0.52 (.206 REF 3.00 0.102 (.118 .004) NOTE 0.86 (.034) REF 0.13 0.076 (.005 .003) ...
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... RF Power Detector LT5511 High Signal Level Up Converting Mixer LT5512 High Signal Level Down Converting Mixer Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 LTC4400-2 Dual Band Cellular Telephone Transmitter 33pF LTC4400 900MHz RF PA SHDN ...