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| NJM2783 Monaural Microphone Amplifier with ALC "GENERAL DESCRIPTION The NJM2783 is a monaural microphone amplifier with auto level control function to avoid distortion due to clipping. The voltage gain and the limit level are adjustable by external resistors. It is suitable for mini component audio system, home audio system, karaoke and others. "PACKAGE OUTLINE " FEATURES * Operating Voltage * Monaural Microphone Amplifier * Auto level control (ALC) function (Adjustable the limit level by external resistors * Adjustable the voltage gain by external resistors * Additional Gain Amplifier * Built-in Buffer Amplifier * Low Equivalent Input Noise * Carefully designed to reject RF noise * Bipolar Technology * Package Outline " BLOCK DIAGRAM NJM2783V +2.7 to +13.0V 200mVrms to 2Vrms) +20 to +63dB (RSENSE=OPEN) 0dB/+20dB switchable 1Vrms typ. SSOP14 IN GAIN SW INT SENSE VREF V+ GND Detector Bias Microphone Amprifier Additional Gain 0dB/+20dB Buffer Amplifier 100k 100k VCR GAIN1 GAIN2 DET OUT BUFFIN BUFFGAIN BUFFOUT Version 7.0E -1- NJM2783 "PIN CONFIGURATION SSOP14 1 2 3 4 5 6 7 14 13 12 11 10 9 8 No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Symbol GAIN1 GAIN2 DET OUT BUFFIN BUFFGAIN BUFFOUT GND V+ VREF SENSE INT GAIN SW IN Function Microphone Amp Gain Setting 1 Microphone Amp Gain Setting 2 Detector Input Microphone Amp Output Buffer Input Buffer Gain Setting Buffer Output Ground Power Supply Reference Voltage Limit Level Setting Recovery Time Setting Gain Setting Microphone Input -2- Version 7.0E NJM2783 "ABSOLUTE MAXIMUM RATING (Ta=25C) PARAMETER Power Supply Voltage Power Dissipation Maximum Input Voltage Operating Temperature Range Storage Temperature Range 1) 2) SYMBOL V + RATING +14 450* 1) + 2) UNIT V mW V C C PD VIMAX Topr Tstg 0~V * -40 ~ +85 -40 ~ +125 * EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 2layers, FR-4) mounting * Don't put Input Voltage more than Power Supply Voltage. "RECOMMENDED OPERATING VOLTAGE RANGE (Ta=25C) PARAMETER Operating Voltage Range SYMBOL V + TEST CONDITION - MIN. 2.7 TYP. 9.0 MAX. 13.0 UNIT V "ELECTRICAL CHARACTERISTICS #POWER SUPPLY (Ta=25C, V =9.0V unless otherwise specified) PARAMETER Operating Current Reference Voltage SYMBOL ICC VREF TEST CONDITION No signal No signal MIN. 4.2 TYP. 3.5 4.5 MAX. 6.0 4.8 UNIT mA V + #AC CHARACTERISTICS + (Ta=25C, V =9.0V, VIN=0.7mVrms, f=1kHz, RG1=330, RG2=47k, RSENSE=OPEN, RL=4.7k, GAIN SW=+20dB unless otherwise specified) PARAMETER Voltage Gain 1 Voltage Gain 2 Maximum Output Voltage ALC Level 1 ALC Level 2 ALC Off Equivalent Input Noise Voltage Total Harmonic Distortion Power Supply Ripple Rejection SYMBOL GV1 GV2 VOM VLIM1 VLIM2 VOFF VNO THD+N RR + TEST CONDITION MIN. 60 TYP. 63 43 2.4 1.0 1.0 2.0 -120 (1.0) -35 MAX. 66 46 1.3 1.3 2.4 -110 (3.2) 1 -20 UNIT dB dB Vrms Vrms Vrms Vrms dBV (Vrms) % dB GAIN SW=0dB THD=1% VIN=1.4mVrms RSENSE=47k VIN=40mVrms RSENSE=47k VIN=1.4mVrms Rg=0, A-weighted BW=400-30kHz Vripple=100mVrms, f=1kHz 40 2.0 0.7 0.7 1.6 - #CONTROL CHARACTERISTICS (Ta=25C, V =9.0V unless otherwise specified) PARAMETER High Level Input Voltage Low Level Input Voltage Control Current SYMBOL VIH VIL ISW VIH=5V TEST CONDITION MIN. 2.0 0 TYP. MAX. V + UNIT V V A 0.5 100 Version 7.0E -3- NJM2783 "CONTROL TERMINAL EXPLANATION GAIN SW (13 pin) MODE 0dB +20dB STATUS L H NOTE The gain of microphone amplifier is not increased. The gain of microphone amplifier is increased +20dB. "TEST CIRCUIT V+ VIN 0.47F V IL V IH 1F RSENSE 10F 10F V+ 14 IN 13 GAIN SW 12 INT 11 SENSE 10 VREF 9 V+ 8 GND Detector Bias GAIN1 GAIN2 DET OUT BUFFIN BUFFGAIN BUFFOUT 1 2 3 4 5 0.47F 6 7 RG2 RG1 10F 1F 4.7F 4.7F VR 10k V 4.7k -4- Version 7.0E NJM2783 "APPLICATION CIRCUIT V+ INPUT V+ 1F 47k 10F 10F V+ 0.47F 14 IN 13 GAIN SW 12 INT 11 SENSE 10 VREF 9 V+ 8 GND Detector Bias GAIN1 GAIN2 DET OUT BUFFIN BUFFGAIN BUFFOUT 1 2 3 4 5 0.47F 6 7 47k 330 10F 1F 4.7F 4.7F VR 10k OUTPUT Version 7.0E -5- NJM2783 ! TERMINAL DESCRIPTION PIN NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ V+ V+ TERMINAL DC VOLTAGE 1 GAIN1 Microphone Amp Gain Setting 1 500 V+/2 20p V+ V+ V+ V+ 2 GAIN2 Microphone Amp Gain Setting 2 200 50 V+/2 50 V+ V+ 3 DET Detector Input 24k V+/2 V+ V+ V+ V+ 4 OUT Microphone Amp Output 200 50 V+/2 50 V+ V+ 5 BUFFIN Buffer Input 100k 1k V+/2 10p VREF -6- Version 7.0E NJM2783 ! TERMINAL DESCRIPTION PIN NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ V+ TERMINAL DC VOLTAGE 6 BUFFGAIN Buffer Gain Setting 1k V+/2 10p V+ V+ 50 7 BUFFOUT Buffer Output 50 V+/2 V+ V+ V+ V+ 44k V+ V+ 200k 10 VREF Reference Voltage 200 200k 200 V+/2 V+ V+ V+ 40k V+ V+ V+ 11 SENSE Limit Level Setting 200 200 0V V+ V+ V+ V+ 200 12 INT Recovery Time Setting 0V Version 7.0E -7- NJM2783 ! TERMINAL DESCRIPTION PIN NO. SYMBOL FUNCTION EQUIVALENT CIRCUIT V+ V+ TERMINAL DC VOLTAGE 13 GAIN SW Gain Setting 200 150k 0V V+ 275k V+ 500 14 IN Microphone Input 100k 0V 20p VREF -8- Version 7.0E NJM2783 ! TYPICAL CHARACTERISTICS Supply Current vs. Supply Voltage No Signal, RSENSE =OPEN, GAIN SW=+20dB 6 6 Supply Current vs. Temperature No Signal, RSENSE =OPEN, GAIN SW=+20dB 5 Ta=85oC 5 Supply Current [mA] 4 Supply Current [mA] 4 3 Ta=25oC 3 V+=13V V+=9V V+=2.7V Ta=-40oC 2 2 1 1 0 0 2 4 6 8 10 12 14 0 -50 -25 0 25 50 75 100 125 Supply Voltage [V] Temperature [ oC] Reference Voltage vs. Supply Voltage No Signal, RSENSE =OPEN, GAIN SW=+20dB 8 Ta=-40oC 7 6 Ta=25oC 7 6 8 Reference Voltage vs. Temperature No Signal, RSENSE =OPEN, GAIN SW=+20dB V+=13V Reference Voltage [V] Reference Voltage [V] 5 4 3 2 1 0 0 2 4 6 8 10 12 14 Ta=85oC 5 4 3 2 1 0 -50 -25 0 25 50 V+=9V V+=2.7V 75 100 125 Supply Voltage [V] Temperature [ oC] Voltage Gain vs. Frequency 80 V +=9V, V IN=0.7mVrms, RG1=330, RG2=47k RSENSE=OPEN, GAIN SW=+20dB 60 Voltage Gain vs. Frequency V +=9V, V IN=10mVrms, R1=1k, R2=47k GAIN SW=0dB 70 Ta=85oC 50 Ta=85oC Ta=25oC Voltage Gain [dB] 60 Ta=-40oC Voltage Gain [dB] Ta=25oC 40 Ta=-40oC 50 30 40 10 100 1000 10000 100000 20 10 100 1000 10000 100000 Frequency [Hz] Frequency [Hz] Version 7.0E -9- NJM2783 ! TYPICAL CHARACTERISTICS Output Voltage vs. Input Voltage 10 V +=9V, f=1kHz, RG1=330, RG2=47k GAIN SW=+20dB, Ta=25oC Output Voltage vs. Input Voltage 10 V +=9V, f=1kHz, RG1=330, RG2=47k GAIN SW=0dB, Ta=25oC RSENSE =100k 1 Output Voltage [Vrms] 1 RSENSE =47k Output Voltage [Vrms] RSENSE =100k RSENSE =47k RSENSE=22k 0.1 RSENSE=10k 0.1 RSENSE =22k RSENSE =10k 0.01 0.01 0.001 0.00001 0.0001 0.001 0.01 0.1 1 10 0.001 0.00001 0.0001 0.001 0.01 0.1 1 10 Input Voltage [Vrms] Input Voltage [Vrms] Output Voltage vs. Input Voltage 10 V +=9V, f=1kHz, RG1=330, RG2=47k RSENSE =47k, GAIN SW=+20dB Ta=85oC Ta=25oC 1 1 Ta=-40oC 10 Output Voltage vs. Input Voltage V +=9V, f=1kHz, RG1=330, RG2=47k RSENSE =47k, GAIN SW=0dB Ta=85oC Ta=25oC Output Voltage [Vrms] Output Voltage [Vrms] Ta=-40oC 0.1 0.1 0.01 0.01 0.001 0.00001 0.0001 0.001 0.01 0.1 1 10 0.001 0.00001 0.0001 0.001 0.01 0.1 1 10 Input Voltage [Vrms] Input Voltage [Vrms] THD+N vs. Input Voltage 100 V +=9V, f=1kHz, RG1=330, RG2=47k RSENSE =47k, GAIN SW=+20dB, BW=400-30kHz THD+N vs. Input Voltage 100 V +=9V, f=1kHz, RG1=330, RG2=47k RSENSE =47k, GAIN SW=0dB, BW=400-30kHz 10 Ta=85oC Ta=25oC 1 10 THD+N [%] THD+N [%] Ta=85oC 1 Ta=25oC 0.1 Ta=-40oC 0.1 Ta=-40oC 0.01 0.00001 0.0001 0.001 0.01 0.1 1 10 0.01 0.00001 0.0001 0.001 0.01 0.1 1 10 Input Voltage [Vrms] Input Voltage [Vrms] - 10 - Version 7.0E NJM2783 ! TYPICAL CHARACTERISTICS THD+N vs. Output Voltage 100 V +=9V, f=1kHz, RG1=330, RG2=47k RSENSE =OPEN, GAIN SW=+20dB, BW=400-30kHz 100 THD+N vs. Output Voltage V +=9V, f=1kHz, RG1=330, RG2=47k RSENSE =OPEN, GAIN SW=0dB, BW=400-30kHz 10 10 THD+N [%] Ta=-40oC 1 Ta=25oC THD+N [%] Ta=-40oC 1 Ta=25oC 0.1 Ta=85oC 0.1 Ta=85oC 0.01 0.01 0.1 1 10 0.01 0.01 0.1 1 10 Output Voltage [Vrms] Output Voltage [Vrms] Input Noise Voltage vs. Temperature Rg=0, RSENSE =OPEN, GAIN SW=+20dB -100 Control Characteristics 2 V +=9V, f=1kHz, RG1=330,RG2=47k V IN=0.7Vrms, RSENSE =47k, Ta=25oC Equivalent Input Noise Voltage [dBV] 1.5 -110 Output Voltage [Vrms] 100 125 1 V+=2.7V -120 0.5 V+=9V V+=13V -130 -50 0 -25 0 25 50 75 0 0.5 1 1.5 2 2.5 3 Temperature [ oC] GAIN SW Input Voltage [V] Version 7.0E - 11 - NJM2783 ! TYPICAL CHARACTERISTICS Attack Response (C RECOVER=1uF) V+=9V, VIN=0.5mVrms to 5mVrms, f=1kHz, Ta=25 oC 2 1.5 1 TAT T ACK =2msec. (The time to settle to +1dB) 2 1.5 1 Attack Response (CRECOVER=2.2uF) V+=9V, VIN=0.5mVrms to 5mVrms, f=1kHz, Ta=25 oC TAT T ACK =3msec. (The time to settle to +1dB) Output Voltage [V] 0.5 0 -0.5 -1 -1.5 -2 -10 0 10 20 30 40 Output Voltage [V] 0.5 0 -0.5 -1 -1.5 -2 -10 0 10 20 30 40 Time [msec.] Time [msec.] Attack Response (CRECOVER=4.7uF) V+=9V, VIN=0.5mVrms to 5mVrms, f=1kHz, Ta=25 oC 2 1.5 1 TAT T ACK=4msec. (The time to settle to +1dB) 2 1.5 1 Attack Response (C RECOVER=10uF) V+=9V, VIN=0.5mVrms to 5mVrms, f=1kHz, Ta=25 oC TAT T ACK=5msec. (The time to settle to +1dB) Output Voltage [V] 0.5 0 -0.5 -1 -1.5 -2 -10 0 10 20 30 40 Output Voltage [V] 0.5 0 -0.5 -1 -1.5 -2 -10 0 10 20 30 40 Time [msec.] Time [msec.] - 12 - Version 7.0E NJM2783 ! TYPICAL CHARACTERISTICS Recovery Response (C RECOVER=1uF) V+=9V, VIN=1.58mVrms to 0.5mVrms, f=1kHz, Ta=25 oC 1.5 TRECOVER=0.28sec. (The time to recover to -1dB) 1.5 Recovery Response (CRECOVER=2.2uF) V+=9V, VIN=1.58mVrms to 0.5mVrms, f=1kHz, Ta=25 oC TRECOVER=0.63sec. (The time to recover to -1dB) 1 1 Output Voltage [V] 0.5 Output Voltage [V] 0 0.5 1 1.5 2 2.5 0.5 0 0 -0.5 -0.5 -1 -1 -1.5 -0.5 -1.5 -0.5 0 0.5 1 1.5 2 2.5 Time [sec.] Time [sec.] Recovery Response (CRECOVER=4.7uF) V+=9V, VIN=1.58mVrms to 0.5mVrms, f=1kHz, Ta=25 oC 1.5 TRECOVER=1.45sec. (The time to recover to -1dB) 1.5 Recovery Response (C RECOVER=10uF) V+=9V, VIN=1.58mVrms to 0.5mVrms, f=1kHz, Ta=25 oC TRECOVER=2.93sec. (The time to recover to -1dB) 1 1 Output Voltage [V] 0.5 Output Voltage [V] 0 0.5 1 1.5 2 2.5 0.5 0 0 -0.5 -0.5 -1 -1 -1.5 -0.5 -1.5 -0.5 0 0.5 1 1.5 2 2.5 Time [sec.] Time [sec.] [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Version 7.0E - 13 - |
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