FCM34018

FCM34018 FCI | Alldatasheet

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Technical content

DESCRIPTION

speaker-phone integrated circuit incorporates the necessary functions to produce a high quality hands-free speaker-phone system. The applications include household and office speaker-phones, intercom systems, hand free kit for mobile phones, and others DIP-28

FEATURES

*All necessary level detection and attenuation controls for a hand-free telephone included. *Background noise level monitoring with long time constant. *Background sound level compensation for transmit and receive levels as well as the background level. *Wide operating dynamic range through signal compression. *On-chip voltage regulators illuminate external regulators for lining operation. *Power audio amplifier for typical 100mW output (into 25 ohms)with peak limiting for speaker to minimize distortion. *Chip Select pin for active/stand by operation. *Volume control function for external volume control. *Standard 28-pin plastic DIP and SOP package. ABSOLUTE MAXIMUM RATINGS(Ta=25 C,Voltages referred to pin 22) PARAMETER VALUE UNIT V+ terminal Voltage (pin 16) +12,-1.0 V CS (pin 18 +12,-1.0 V Speaker amplifier Ground(pin 14) +3.0,-1.0 V VLC(pin 24) +VCC,-1.0 V Storage temperature -65 ~ +150 C RECOMMENDED OPERATION CONDITIONS PARAMETER VALUE UNIT V+ Terminal Voltage (pin 16) +6.0 to +11 V CS (pin 18) 0 to +11 V Vcc (pin 20) 0 to 3.0 mA VLC(pin 24) 0.55VB to VB V Receive Signal(pin 27) 0 to 250 mVrms Microphone Signal(pin 9) 0 to 5.0 mVrms Speaker Amplifier Ground (pin 14) -10 to +10 mVdc Ambient Temperature -20 to +60 C FCM34018 FCM34018 Linear Integrated Circuit

1 RR A resistor to ground provides a reference current for the transmit and receive attenuators

2 RTX A resistor to ground determines the nominal gain of the transmit attenuator ,the transmit channel gain is inversely proportional to RTX resistance. 3 TXI Input to the transmit attenuator. Input resistance is nominally 5.0k ohms. 4 TXO Output of the transmit attenuator. The TXO output signal drivers the input of transmit level detcetor, as well as the external circuit which drivers the telephone line. 5 TLI Input of the transmit level detector. An external resistor ac coupled to The TLI pin sets the detection level. Decreasing this resistor increases the sensitivity to transmit channel signals. 6 TLO Output of the transmit level detector. The external re sistor and capacitor set the time the comparator will hold the system in the transmit mode after speech ceases. 7 RLI Input of the receive level detector. An external resistor ac coupled to The RLI pin sets the detection level. Decreasing this resistor increases the sensitivity to receive channel signals 8 RLO Output of the receive level detector. The external resistor and capacitor set the time the comparator will hold the system in the receive mode after speech ceases 9 MCI Microphone amplifier input. Input impedance is nominally 10k ohms and the dc bias voltage is approximately equal to VB 10 MCO Microphone amplifier output. The MIC am p gain is internally set at 34dB(50V/V) 11 CP1 A parallel resistor and capacitor connected between this pin and VCC holds a voltage corresponding to the background noise level. The transmit detector compares the CP1 voltage with the speech signal from 12 CP2 A capacitor at this pin peak detects the speech si gnals for comparison with the background noise level held at CP1. 13 XDI Input to the transmit detector system. The microphone amplifier output is ac coupled to the XDI pin through an external resistor 14 SKG High current ground pin for the speaker amplifier ou tput stage. The SKG voltage should be within 10mV of the ground voltage at pin 22 15 SKO Speaker amplifier output. The SKO pin will source and sink up to 100mA when ac coupled to the speaker. The speaker amplifier gain is internally set at 34dB(50V/V). 16 V+ Input DC supply voltage. V+ can be powered from Tip and Ring if an ac decoupling inductor is used to prevent loading ac line signals. The required V+ voltage is 6.0V to 11V(7.5V nominal ) at 7.0mA 17 AGC A capacitor from this pin to VB stabilizes the speaker amplifier gain control loop, and additionally controls the attack and decay time of this circuit. The gain control loop limits the speaker amplifier input to prevent clipping at SKO. The internal resistance at AGC pin is nominally 110k ohms. 18 CS Digital chip select input. When at a logic "0" (<0.7V) the VCC regulator is enabled. When at a logic "1" (>1.6V),the chip is in the standby mode drawing 0.5mA.An open CS pin is a logic "0". Input Impedance is nominally 140k ohms. The input voltage should not exceed 11V 19 SKI Input to the speaker amplifier. Input impedance is nominally 20k ohms 20 VCC A 5.4V regulated output which powers all circ uits except the speaker amplifier output stage

21 VB An output voltage equal to approximately VCC/2 which series as an analog ground for the

speakerphone system. Up to 1.5mA of external load current may be sourced from VB. Output impedance is 250 ohms. A filter capacitor is required

22 GND Ground pin for the IC(except the speaker amplifier)

R Contek RECEIVE VOLUME CONTROL ENABLE INPUT VCC REGULATOR RECEIVE INPUT DC INPUT TELEPHONE LINE

(continued) PIN NAME DESCRIPTION 23 XDC Transmit detector output. A resistor and capacitor at his pin hold the system in the transmit mode during pauses between words or phrases. When the XDC pin voltage decays to ground, the attenuators switch from the transmit mode to idle mode. The internal resistor at XDC is nominally 2.6k ohms(see fig.1). 24 VLC Volume control input>connecting this pin to the slider of a variable resistor provides receive mode volume control. The VLC pin voltage should be less than or equal to VB 25 ACF Attenuator control filter. A capa citor connected to this pin reduces noise transient as the attenuator control switches level of attenuation 26 RXO Output of the receive attenuator. Normally this pin is ac coupled to the input of the speaker amplifier 27 RXI Input of the receive attenuator. Input impedance is nominally is 5.0k ohms 28 RRX A resistor to ground determines the nominal gain of the receive attenuator. The receive channel gain is directly proportional to the RRX resistance ELECTRICAL CHARACTERISTICS(referred to fig. 1) PARAMETER SYMBOL MIN TYP MAX UNIT SUPPLY VOLTAGES V+ Supply Current V+=11V, Pin 18=0.7V V+=11V, Pin 18=1.6V IV+ 9.0 800 mA A VCC Voltage (V+=7.5V) Line Regulation (6.5V<V+<11V) Output Resistance (I CC=3mA) Vcc VccLN RoVcc Vccsat 4.9 5.4 6.0 5.9 150 300 Vdc MV ohms mV VB Voltage(V+=7.5V) Output Resistance (I B=1.7mA) Vb Rovb 2.5 2.9 250

3.3 Vdc

Receive Attenuator Gain (1.0kHz) Rx Mode, Pin 24= VB, Pin 27 = 250Mvrms Range (Rx to Tx Modes) Idle Mode, Pin 27= 250mVrms GRX GRX GRI 2.0 -20 6.0 -16 -12 dB dB dB RXO Voltage (Rx Mode) VRXO 1.8 2.3 3.2 mV Delta RXO Voltage (Switch from Rx to Tx Mode) VRXO 100 mV RXO Sink Current (Rx mode) IRXOL 75 A TXO Source Current (Tx mode) I TXOH 1.0 3.0 mA TXO Input Resistance R TXI 3.5 5.0 8.0 k ACF Voltage (VCC-Pin 25 Voltage) Rx Mode Tx Mode Idle Mode V ACF 150 6.0 mV mV mV SPEAKER AMPLIFIER Speaker Amp Gain (pin 19 = 20mVrms) G SPK 33 34 35 dB SKI Input Resistance R SKI 15 22 37 k SKO Voltage ( Pin 19 =Cap couple to GND) VSKO 2.4 3.0 3.6 Vdc SKO High Voltage ( Pin 19 = 0.1V, -100mA Load at Pin 15) VSKOH 5.5 Vdc SKO Low Voltage (pin 19=0.1V, +100mA Load at Pin 15) VSKOL 600 mV MICROPHONE AMPLIFIER Microphone Amp Gain ( Pin 9 = 10mVrms,1KHz) GMCI 32.5 34 35 dB Microphone Amp Input Resistance R MCI 6.5 10 16 k LOGAMPS RLO Leakage Current (Pin 8 = VB+1.0V) I LKRLO 2.0 A TLO Leakage Current (Pin 6 = VB+1.0V) I LKTLO 2.0 A Transmit-Receive Switching Threshold (Ratio of ITLI to IRLI - at

20 A - to Switch Tx-Rx Comparator)

V XDC 4.0 Vdc Vdc CP2 Current Source I CP2 5.0 10 13 A Distortion Rx Mode RXI to SKO (pin 27 = 10mVrms,1KHz) R XD 1.5 Tx Mode MCI to TXO (Pin 9 = 5mVrms,1KHz) TXD 2.0 Note 1:V+=7.5V, CS =0.7V except where noted. Note 2:Rx mode:pin7=-100 A, pin5=+100 A, except where noted Tx mode: pin 5,13=-100 A, pin 7=+100 A, pin 11=0V. Idle mode: Pin 5=-100A, pin 7,13=+100 A Note 3:Current into a pin designed as + ,current out of a pin designed -; Note 4:Voltage referred to pin 22,Tamb=25 C

TEMPERATURE CHARACTERISTICS(-20 TO +60 C ) PARAMETER PIN TYP CHANGE UNIT V+ Supply Current ( V+ 11V,Pin 18 = 0.7V ) 16 -0.2 %/ C V+ Supply Current(V+ 11V,Pin 18 = 1.6V ) 16 -0.4 %/ C VCC Voltage( V+ = 7.5V ) 20 +0.1 %/ C Attenuator Gain ( Max and Min Setting ) +-0.003 dB/ C Delta RXO,TXO Voltage 4,26 +-0.24 %/ C Speaker AMP Gain 15,19 +-0.001 dB/ C Microphone AMP Gain 9,10 +-0.4 dB/ C Microphone Amp Input Resistance 9 +0.4 %/ C Tx-Rx Switching Threshold (20 A) 5,7 +-0.2 nA/ C Fig 2 - Basic Line powered Speakerphone 220kΩ 68kΩ 4.7kΩ 2.7kΩ 0.01µF 0.05µF Hook Switch R T 22kΩ 3.3kΩ 470kΩ 470kΩ 47kΩ 0.068µF 4700pF4700pF 0.01µF 47kΩ 15kΩ 8.2kΩ 1000µF 0.068µF 2.2kΩ 470kΩ 10µF 0.1µF 8.2kΩ 33kΩ 47kΩ 8.2kΩ 47kΩ 6.8kΩ 0.01µF0.01µF 0.1µF 1.0µF 4.7µF 47µF 100kΩ Vcc 3.3kΩ0.068µF 0.068µF 4.7kΩ0.1µF 0.05µF S2 2kΩ MIC VB Speaker 47µF VB 20kΩ 24kΩ Volume Control 47µF 47µF 91kΩ 30kΩ 18kΩ 4.3kΩ0.01µF 0.05µF 4.7µF 4.7µF 200kΩ 2.2MΩ 2.2MΩ 1.0µF 1.0µF ΤXΙΜ CΟ XDΙ 10 13 4 TXO TLI CP1 ACF AGC CS RLI RXI GND RLO TLO XDC CP2 SKI RXO RRX RR RTXVcc VB VLC SKG14

15 SKO

9 MCI

0.1µF

Fig 3 - Pads location of FCM34018 04 05 06 07 08 09 10 11 12 17181920212223242526 2.7 mm Y 2.16 mm

Die size Хr=2.7mm, Уr=2.16 mm (pad size 100х100 mkm2) No of pad X Y 01 0,088 0,955 02 0,088 0,723 03 0,088 0,418 04 0,088 0,088 05 0,388 0,088 06 0,635 0,088 07 0,851 0,088 08 1,065 0,088 09 1,495 0,088 10 1,717 0,088 11 1,938 0,088 12 2,512 0,088 13 2,512 0,307 14 2,512 0,523 15 2,512 1,204 16 2,512 1,725 17 2,512 1,972 18 2,095 1,972 19 1,884 1,972 20 1,667 1,972 21 1,438 1,919 22 1,086 1,919 23 0,826 1,972 24 0,580 1,972 25 0,334 1,972 26 0,088 1,972 27 0,088 1,455 28 0,088 1,181

Fig 4 - Bonding diagram of FCM34018