FX304 CMLMICRO | Alldatasheet
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CML Semiconductor Products PRODUCT INFORMATION FX304 cnet Audio Processor Publication D/304/5 December 1991 Provisional Issue Features/Applications @ Full Duplex Audio Processing @ High Baseband and Carrier @ Designed to meet Net-C Cellular Rejection Specification @ Independent I/P Gain Adjustment @ On-Chip Audio Bandpass Filters @ On-Chip Clock Oscillator Circuits (300-3000Hz) @ Crystal Oscillator Stability @ Fixed Frequency Inversion @ Single 5V CMOS Process @ Clear/Invert Facility @ Surface Mount and DIL @ Output Enable/Disable Package Styles GrnuTeRo/P gp cI BALANCEO MooULATOR VP Seah cre a on” cr cuEaR CHANNEL 1 1e1 De 9619 33 SIBLE TALICLOCK _ Locks Fg re $V <—-— Voo. "5 TS <s—: |FX304 cau, a Vous: y a2 any “ee C2 FILTER O”F (C2 BALANCED MODULATOR I/P- Fig. 1 Schematic Block Diagram Brief Description The FX304 is a duplex filter array and frequency 5. Clear/invert switching causing automatic inversion scrambler compatible with the Net-C changover of signal routes and input circuitry. specification. The two channels, C1 and C2 are 6. A buffered low noise output with switching identical and independent, each consisting of: clock filter. 1, A 10th order 3.1kHz input lowpass filter in 7. An output enable switching facility. the ‘Invert’ path. - Both filter sets meet the Net-C specification and 2. A balanced modulator providing fixed use switched capacitor technology. The common frequency inversion (3.3kHz) and having carrier frequency and filter switching clock are high baseband and carrier rejection. generated on-chip using an external 4.433619MHz 3. A 14th order channel output bandpass filter Xtal or clock input. {300Hz to 3kHz). , oe The FX304 is a low-power, single SV CMOS 4. Input Op-Amps in both ‘Clear’ and ‘Invert’ device and is available in 24-pin DIL and 24-pin paths allowing external components to set plastic SMD packages. input gains, and pre-emphasis or de- emphasis in the ‘Clear’ path.
on | ued | pce Fx304) | FX304LG | FX304LS, 1 1 1 XtallClock: 4.433619MHz Xtal or externally derived clock is injected at this pin. See Fig. 2. 2 2 2 Xtal: Output of clock oscillator inverter. 3 3 3 C1 Clearlinvert: Controls the operation of channel 1 modulation, See Table 1 Internal 1MQ pull-up. 4 4 4 1 Filter Output: The output of the channel 1 input filter. It is to be coupled to “C1 balanced modulator input” via a 1.0uF capacitor (Cys). See Fig. 2 5 5 5 C1 Balanced Modulator Input: The input to channel 1 balanced modulator. Internally biased at Vpp/2, it is to be coupled to “C1 Filter Output” via a 1.uF copacitor (Cys). See Fig. 2. 6 6 6 C1 Amp Output: Channel 1 amplifier, with external components (see Fig. 2) can be used to provide pre-emphasis, de-emphasis and/or gain in the ‘Clear’ path. 7 7 7 C1 Clear Input: The negative input of channel 1 amplifier for use in the ‘Clear’ path. Recommended external components shown in Fig. 2. 8 8 8 C1 Output Enable: Controls the status of channel 1 output. See Table 1. Internal 1MQ pull-up. 9 9 9 C1 Output: The analogue output of channel 1, Intemally biased at Vpp/2. Output state is dependent on channel 1 “‘Clear/invert” and "Output Enable” pins. See Table 1. vane Crariaver | Output Embie |Our | Output Control 1 Clear ) Frequency Inverted x Voo/2 10 10 10 C1 Gain Amp Output: The output pin of Channel 1 gain adjusting op-amp, see Fig. 2 for gain setting components. " " n C1 Scramble Input: The analogue signal input to channel 1 in the ‘Invert’ mode. This input is to a gain adjusting op-amp whose gain is set by external components. See Fig. 2. 2 2 2 Veg? Negative Supply (GND). 3 B 8B Bias: The analogue bias line at Vpp/2. It should be decoupled to Veg via @ 1.0uF or greater capacitor. See Fig. 2 1“ “ 4 C2 Scramble Input: The analogue signal input to channel 2 in the ‘Invert’ mode. This input is to a gain adjusting op-amp whose gain is set by external components. See Fig. 2. 5 5 5 C2 Gain Amp Output: The output pin of Channel 2 gain adjusting op-amp, see Fig. 2 for gain setting components. 6 16 16 C2 Output: The analogue output of channel 2, internally biased at Voo/2. Output state is dependent on channel 2 “Clear/Invert” and “Output Enable” pins. See Table 1. 7 "7 ”7 C2 Output Enable: Controls the status of channel 2 output. See Table 1. Internal MQ pulhup. 8 18 18 C2 Clear Input: The negative input of channel 2 amplifier for use in the ‘Clear’ path. Recommended external components shown in Fig. 2. 19 19 19 C2 Amp Output: Channel 2 amplifier with extemal components (see Fig. 2) can be Used to provide pre-emphasis, de-emphasis and/or gain in the ‘Clear’ path. 20 20 20 C2 Balanced Modulator Input: The input to channel 2 balanced modulator. Internally biased at Vop/2, it is to be coupled to ‘C2 Filter Output’ via 1.0uF capacitor (C12). See Fig. 2. a a a C2 Filter Output: The output of the channel 2 input filter. It should be coupled to "C2 Balanced Modulator Input” via a 1.0uF capacitor (C12), See Fig. 2. 2 2 2 C2 Clearlinvert: Controls the operation of channel 2 modulation. See Table 1. Internal 1MQ_ pull-up. 2 23 23 No Connection. 24 24 24 Vpp: A positive 5V supply.
xe {] Veo Vss Recommended i" cad v, = re] cramp ovr C2 AMP O/P = Now? © = ls FX304J—e — ' ' ! C1 OUTPUT ENABLE J, 17 fg 2 QUTPUT ENABLE ' * - ciourrut_}, ref C2 OUTPUT + ' 2 C1 GAIN AMP O/P Re ‘ ce 1 Ge in H C1 SCRAMBLE 1/P “ C2 SCRAMBLE UP 1 Vss Component References Component References Component References Ry 100k 3 Re 100k Cy 2.2n Ry 100k 3 Cy Ou Cy tn Ry 200k 2 ry 120p Cro 120p Ry 330k 2 Ce 3p Che 0.47u Re 100k 3 c ap Cis 1.00 Tolerance Tet Capacitors 20% Notes: +e cet wn ners tC enn et 7A 8 £ Reomirsirtennnatin pectecaat bacon cmon Sf an Fig. 2 External Component Connections ew Me > BBY hp [> X i" tw % ™ RS im bs [1 &)—h Bw KI PS > xd Fig. 3. Simplified Signal Paths
Exceeding the maximum rating can result in device damage. Operation of the device outside the operating limits is not implied. Supply voltage =0.3V t07.0V Input voltage at any pin (ref Vss = OV) =0.3V to (Vop + 0.3V) Output sink/source current (supply pins) £30mA (other pins) +20mA Total device dissipation @ 25°C 800mW Max. Derating 10mw/°C Operating temperature range: FX304J —30°C to +85°C (Ceramic) FX304LG/LS 30°C to +70°C (Plastic) ‘Storage temperature range: FX304J 56°C to + 125°C (Ceramic) FX304LG/LS 40°C to +85°C (Plastic) Operating Limits All characteristics measured using the following parameters unless otherwise specified: Vpo = 5V, Tam = 25°C, §=4.433619MHz, Audio Level Ref: 0dB = 775mVrms @ 1kHz. Characteristics See Note Min. Typ. Max. Unit ‘Static Values Supply Voltage 1 45 5.0 55 v Supply Current ba 7.0 - mA Input Impedance (Digital) 100 _ - kQ Input Impedance (Amplifiers) 10 10 - MQ Input Impedance (Bal Mod) - 2» - ‘9 ‘Output Impedance (L P Filters) = 20 - ro Output Impedance (C1, C2) - 150 800 Q Output Impedance (C1, C2 Amps) - 10 - kQ Inputs Logic ‘1’ 35 - _ Vv Inputs Logic ‘0’ - - 15 v Dynamic Values: 1 Analogue Signal Input Levels 30 ~ +6 dB Analogue Signal Output Levels 30 - +6 4B Unwanted Modulation Products 283 - = ~40 B Carrier Breakthrough 283 - -55 = dB Baseband Breakthrough 283 - - -40 Bo Carrier Frequency - 3299 - Hz Analogue Output Noise 4 _ 50 - 4B Fitters: Input Low Pass Filter Cut-off Frequency (~3dB) - 3100 - Hz Passband Ripple (300Hz—3kH2) - 10 - 6B Attenuation at 3.3kHz - 0 - 8 Attenuation at 3.6kH2 - 50 - a8 Passband Gain - 05 - dB | Output Band Pass Fitter 5 | Passband Frequencies 300 3000 Hz Passband Ripple - 1.0 - dB Low Freq. Roll-off <200Hz 12 - - dB/oct High Freq. Roll-off >3.4kHz 24 - = dB/oct | Passband Gain 3 4 5 oB Overall Modulated or De-Modulated | Channel Response Passband Frequencies 300 3000 Hz Passband Ripple -3 +1 4B | Low Freq, Roll-off <250Hz 18 - - dB/oct High Freq. Roll-off >3.4kHz 18 = - dB/oct Passband Gain 5 - 2 - dB Distortion 2 - 20 - % Notes: 1. Dynamic Characteristics specified at 5V Vop. 2. Measured with Input Level —3dB. 3. Single Modulated Channel. 4. Short circuit input, any analogue output, in 30kHz bandwidth. 5. Op Amp gain 0B.
figure 7. The ‘LG’ version is shown in figure 8 and _ includes input protection. However precautions To allow complete identification the FX304LG which may cause damage.
- Pins number anti-clockwise when viewed from mene ~e
and CML eserves the ight at any time without notice 1 change the sad creuty.