cxa1741q Sony Electronics, cxa1741q Datasheet
cxa1741q
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cxa1741q Summary of contents
Page 1
... IF Amplifier for Analog Cellular Communications For the availability of this product, please contact the sales office. Description The CXA1741Q is an analog cellular(TACS/ NTACS which incorporates an IF filter. Features • Incorporates a ceramic filter function, which is normally mounted externally. • Quadrature detection discriminator function. ...
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... When designing a PCB, ensure that all GND pins of IC are connected to the GND on PCB with its connection wiring distance minimized. (Top View AMP PSN PSN MIXER 1/2 BPF0 AGC BPF1 RSSI LIM DET —2— CXA1741Q XTALIN 19 XTALOUT 18 AGCPS 17 VREF OSC 16 RSSIPS RSDETPS GND2 ...
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... B.P.F N.F.B Network LIM RSSI 1k —3— CXA1741Q Description Changeover switch for built-in filter. TACS for Low; NTACS for High. VREF GND Not internally connected. BPF output monitor. Not used normally. Connected to the LIM and RSSI inputs in the IC. ...
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... I/O Equivalent circuit resistance 11 147 7 12 147 147 8 147 —4— CXA1741Q Description RSSI output. Outputs a DC voltage in accordance with the signal input to the RF amplifier. Adjusts the RSSI amplifier gain (varies the resistance obtain a linear RSSI output). 7 Limiter operation monitor. Not used normally. ...
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... RSSIPS 1 VREF 1.3 V I/O Equivalent circuit resistance 147 reference voltage used in the internal circuit —5— CXA1741Q Description Power supply. Supplies current to the LIM, DET, and RSSI circuits. Ground. IC operation check. Connects an RSSI detector integrating capacitor operation check. Connects an RSSI integrating capacitor ...
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... V 3 GND 0 V I/O Equivalent circuit resistance VREF 10k 147 20 10k 25 22 1.5k VREF 21 —6— CXA1741Q Description Connects an AGC 33 integrating capacitor Connect a crystal oscillator to form a Colpitts-type 24 oscillator circuit. 15p When an external oscillator is used, its input 19 must be connected to Pin 20. 21 Ground. ...
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... MIXER RF AMP 660 147 36 37 147 —7— CXA1741Q Description RF AMP output monitor. Connected to the MIXER input in the IC. Balance adjustment for mixers 1 and 660 IC operational check. Power supply. Supplies current to the PSN, BPF, and BIAS circuits. ...
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... V 40 BPFPS2 1.2 V I/O Equivalent circuit resistance B.P.F signal reference voltage reference voltage used for B.P.F —8— CXA1741Q Description Monitor for the pseud- 33 ground voltage used in the internal circuits. When connected external capacitor, this pin also functions to lower the reference voltage dynamic impedance. ...
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... Vin = -50 dBm, Swept with fin = 45 MHz regarded as the center fo ±40 kHz fin = 45 MHz, -30 dBm, fmod=1 kHz, Dev. = 5.6 kHz, Dev. = 5.6 kHz, used LPF 20 kHz fin = 45 MHz, -30 dBm, fmod = 1 kHz, Mod = 80% used LPF 20 kHz —9— CXA1741Q 0dBm = 50 , 1mW 25° 89.9 MHz OSC Min ...
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... Mhz, -30 dBm, fmod = 1 kHz, Mod = 80%, Used LPF 20 kHz fin = 45 Mhz, -30 dBm, fmod = 1 kHz, Dev kHz, Used LPF 20 kHz No input MHz, -60 dBm MHz, -20 dBm MHz MHz 70° - 70°C —10— CXA1741Q Min. Typ. Max. Unit 3 1.15 1 ...
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... RF AMP PSN PSN MIXER 1/ 2 BPF0 AGC BPF1 RSSI LIM DET 102 220k —11— CXA1741Q 6 10p 0.47µ 102 18 104 17 OSC 223 104 ...
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... RF AMP MIXER 1/2 AGC RSSI LIM DET 94k 220k 82p 47k AUDIO RSSI OUT OUT —12— CXA1741Q Oscillator circuit 45MHz IN 7p 100p 109.9MHz 10p 22 21 0.33µ 20 Vcc 19 18 0.047µ 17 OSC 0.1µ 16 0.1µ 0.1µ ...
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... NTACS Vcc 45MHz AMP MIXER 1/2 OSC AGC RSSI LIM DET RSSI AUDIO OUT OUT AUDIO RSSI output output Signal Flow —13— CXA1741Q IFIN 21 XTALIN 20 Crystal Oscillator Circuit XTALOUT ...
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... Power supply Power supply pins (Pins 11, 24, and 33) must be decoupled with the shortest distance. 2) Oscillator The figures below show how to use the CXA1741Q oscillator. Vcc Vcc 20 19 (a) Inputting a local oscillation signal from an external circuit. The circuit current varies with the externally fed signal amplitude ...
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... The IC generates a DC voltage output, which is nearly proportional to the logarithmic value of RF input level. The output level can be varied by adjusting GADJ (Pin 8) resistance value. Adjust the resistance value so that saturation does not occur when the input level is high. V Vcc (approx. 0.5V) 0 Input level 36 37 Adjust for this curve. dBm —15— CXA1741Q 7 8 RSSI ...
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... Once the optimum value is obtained upon PCB conductive pattern determination, readjustment is unnecessary after sample changes. 9. Pin 19 resonance circuit This circuit must be adjusted for the crystal oscillation frequency. Once the optimum value is obtained upon PCB conductive pattern determination, readjustment is unnecessary after sample changes. —16— CXA1741Q ...
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... When making measurements, observe precautions 7, 8, and 9 under "Notes on Operation" Sensitivity of adjust Total resistance value [k ] Pass Band Shift by the BPF•fo adjustment BPF•fo [kHz] —17— CXA1741Q ...
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... Audio 1kH CCITT weighting Ta=25°C Vcc=3.3V –40 –20 [dBm] S CXA1741•TACS CCITT weighting f=45MHz FM Modulation Dev. 5.7kHz Audio 1kHz Ta=25°C V =3. –40 –20 [dBm] S CXA1741•NTACS CCITT weighting f=45MHz FM Modulation Dev. 3kHz Audio 1kHz Ta=25°C V =3. –40 –20 [dBm] CXA1741Q ...
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... TACS Deviation 5.7kHz Audio 1kHz 14 CCITT weighting NTACS 12 Deviation 3kHz Audio 1kHz CCITT weighting 10 V =2. Ta=25° –10 –8 –6 –4 –2 0 45MHz± f [kHz] —19— NTACS TACS +20 +30 +40 +50 +10 NTACS TACS +10 +20 +30 +40 NTACS TACS + +10 CXA1741Q ...
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... V =3.3V CC –40 – –80 –100 –90 –80 Audio frequency response NTACS TACS 100 1k 10k Frequency [Hz] —20— CXA1741Q RSSI characteristics-2 70°C 25°C –30°C –50 0 dBm IF input voltage I/O characteristics IM3 –70 –60 –50 –40 –30 –20 –10 IF input [dB] ...
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... SONY CODE EIAJ CODE JEDEC CODE 40PIN QFP (PLASTIC) 9.0 ± 0.4 + 0.4 7.0 – 0 0.15 0.3 – 0.1 ± 0.12 M PACKAGE STRUCTURE DETAIL A PACKAGE MATERIAL QFP-40P-L01 LEAD TREATMENT LEAD MATERIAL QFP040-P-0707 PACKAGE WEIGHT —21— CXA1741Q + 0.35 1.5 – 0.15 + 0.1 0.127 – 0.05 0.1 A EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.2g ...