njw1124 New Japan Radio Co.,Ltd, njw1124 Datasheet

Page 1

... Voice Switched Speakerphone circuit GENERAL DESCRIPTION The NJW1124 is a Voice Switched Speakerphone Circuit. NJW1124 includes all of functions processing a high quality hands–free speakerphone system, such as the necessary amplifiers ( Microphone , Receive ,Line), attenuators, level detectors functions. All external capacitors are sufficient small so that ceramic capacitors are applied ...

Page 2

... NJW1124 PIN CONFIGURATION – 2 – VREF2 2 31 MUT CPT 5 28 TLO2 6 27 RLO2 MCI 9 24 MCO 10 23 TLI2 11 22 TLI1 12 21 TXO 13 20 LII 14 19 LIO LIO+ ...

Page 3

... TX-mode (Transmit RX-mode (Receive Idle-mode CPT=CPR TX-mode – RX-mode T G TX-mode – RX-mode (DC) TDC G RX-mode,R =0 -100k TVR VLC I RLI1,TLI1,Maximum Sink Current RSINKMAX NJW1124 RATING 5.5 800 (Note1) -40 ~ +85 -40 ~ +125 + MIN. TYP. MAX. 2.9 4.0 4 =0dB,ReceiveAmplifierG VLC VM MIN. TYP. MAX. 0.7 2 ...

Page 4

... NJW1124 ●MIC Amplifier (TxIN=1mVrms,Gv=40dB,R PARAMETER Output Offset Voltage Input Bias Current Voltage Gain 1 Voltage Gain 2 Maximum Output Voltage Maximum Output Current Maximum Attenuation ●Receive Amplifier (RxIN=1mVrms,Gv=40dB,R PARAMETER Output Offset Voltage Input Bias Current Voltage Gain 1 Voltage Gain 2 Maximum Output Voltage Maximum Output Current ● ...

Page 5

... The microphone input is active. STATUS Receive Force to Receive mode. Receive mode and Transmit mode are automatically AUTO switched. Transmit Force to Transmit mode. STATUS Vol The Receive attenuator Volume is maximum. MAM Vol The Receive attenuator Volume is minimum. MIN NJW1124 MIN. TYP. MAX 0.3 1 MIN. TYP. MAX 0.3 ...

Page 6

... NJW1124 MEASUREMENT CIRCUIT 1 VREF2 S2 100 MUT CPT 1k V+ OPEN 100n 5 TLO2 100n 6 RLO2 300k 1u 0dB 8 TxIN 3k 40dB 300k 9 MCO MCOUT 100n 5.1k 10 TLI2 5.1k 11 TLI1 100n 12 TxOUT TXO 1u 5.1k 13 LII LINEIN 51k 47p 14 LIO- LINEOUT 1.2k LIO+ ...

Page 7

... V+ :ACTIVE FI 25 Receive In GND :Shut Down 1 5.1k 15k 100n 51k 1 RLI1 23 2 SDTC 10k 1 RLI2 + + + + 100n 11k 0.1u RXO 21 4 -IN Receive Out (1) 1 NJW1124 OUTB 8 GND (2) + 10u Speaker Out OUTA 5 - 22k – 7 – ...

Page 8

... NJW1124 TYPICAL CHARACTERISTICS Volume control range vs ambient temperature ( VLC=0 /100k ) 50.0 45.0 V+=4.0V 40.0 V+=3.3V 35.0 30.0 25.0 -50 -30 -10 10 Ambient temperature [℃] Tx ATT Gain vs ambient temperature (V+=3.3V , Receive Amp Gain = 0dB , VLC=0 ) 10.0 Tx-Mode 0.0 -10.0 -20.0 Idle-Mode -30.0 -40.0 Rx-Mode -50.0 -50 -30 - Ambient temperature [℃] Monitor Out vs ambient temperature (V+=3.3V , RLMH=RLML=4.7k ) note : The MONITOR OUT(@Idole-mode) is Hi-Z when there are neither RLMH and RLML. ...

Page 9

... Gv=40dB, Rf=300k , Vin=1mV 40 -40℃ 25℃ 85℃ Gv=0dB, Rf=3k , Vin=100mV 0 -40℃ 25℃ 85℃ -10 10000 100000 10 NJW1124 MUTE Pin Voltage vs MUTE ATT Ratio -40℃ 25℃ 85℃ 0.5 1 1.5 2 MUT PIN Voltage [V] MUTE Pin Voltage vs MUTE ATT Ratio -40℃ 25℃ 85℃ 0.5 1 1.5 2 MUT PIN Voltage [V] MICAMP Gain vs Frequency (V+=4 ...

Page 10

... NJW1124 TYPICAL CHARACTERISTICS Receive AMP Gain vs Frequency (V+=3.3V , RL=5.1k , Cin=1 F, Rin= Gv=40dB, Rf=300k , Vin=1mV Gv=0dB, Rf=3k , Vin=100mV 0 -10 10 100 1000 Frequency [Hz] Receive AMP Gain vs Frequency (V+=3.3V , RL=1.2k , Cin=1 F, Rf=51k , Rin=5. Gv=26dB, Vin=50mV 100 1000 Frequency [Hz] Receive AMP THD+N vs Input Voltage (V+=3 ...

Page 11

... RL=5. 25℃ -40℃ 0.1 0.01 0.1 0.0001 (V+=4.0V,MUT=0.3V, RL=5. 0.1 0.01 25℃ -40℃ 0.001 1 10 0.01 NJW1124 Receive AMP THD+N vs Input Voltage (V+=4.0V, RL=5.1k , Gain=0dB , Rf=3k , Ri=3k , BW:400Hz-30kHz) -40℃ 85℃ 25℃ 0.1 1 Input Voltage [Vrms] Mic AMP THD+N vs Input Voltage , Gain=40dB , Rf=300k , Ri=3k , BW:400Hz-30kHz) 85℃ (MUT=0.3V) 85℃ (MUT=0V) 25℃ -40℃ 0.001 0.01 Input Voltage [Vrms] ...

Page 12

... NJW1124 TYPICAL CHARACTERISTICS LINE AMP THD+N vs Input Voltage (V+=3.3V, RL=1.2k , Gain=26dB , Rf=51k , Ri=5.1k , BW:400Hz-30kHz 85℃ -40℃ 0.1 0.001 0.01 Input Voltage [Vrms] RTSW PIN Voltage vs Rx&Tx ATT. Gain (V+=3.3V 85℃ Rx 85℃ Tx 25℃ Rx 25℃ -10 Tx -40℃ -20 Tx 85℃ Rx 85℃ -30 Tx 25℃ ...