NJM2172 OPERATIONAL AMPLIFIER WITH EVR ■ GENERAL DESCRIPTION The NJM2172 is single supply, dual OP-AMP with electric variable resistor (EVR), which contains buffer amplifier, OP-AMP, reference voltage circuit, EVR and EVR control circuit. + The reference is fixed around 1/2 V level internally, and only required few external parts. The A and B EVR is control separately, and amp drive up to 100Ω(typ.) load. The NJM2172 is suitable for camcorder, CD, MD, and other audio signal process system. ■ FEATURES ● Low Power Supply Voltage ● Low Operating Current ● A/Bch EVR adjust is separately ● EVR range ● Drivability ● Bipolar Technology ● Package Outline 13 -3.0 to -95ｄB 100Ω typ. SSOP14 ■ PIN CONFIGURATION 12 11 10 9 8 Bch VCA Bch OPAMP Bch EVR AMP VREF AMP Bch EVR Bch EVR Control Ach EVR Ach EVR Control Ach EVR AMP Ach OPAMP Ach VCA 1 2 NJM2172V V+ = 2.7 to 5.5V Icc = 5.0mA typ. ■ BLOCK DIAGRAM 14 ■ PACKAGE OUTLINE 3 4 5 6 7 1: OP+INA 2: OP-INA 3: OPOUTA 4: EVROUTA 5: VCNTA 6: VCNTB + 7: V 8: GND 9: Vref 10:REFIN 11:EVROUTB 12:OPOUTB 13:OP-INB 14:OP+INB -1- NJM2172 ■ ABSOLUTE MAXIMUM RATING PARAMETER RATINGS Supply Voltage Storage Temperature Range Operating Temperature Range Power Dissipation +7.0 -50 to +150 -40 to +85 300 (Ta=25°C) SYMBOL(UNIT) OTHERS VDD (V) Tstg (°C) Topr (°C) PD (mW) SSOP14（ONLY） ■ERECTRICAL CHARACTERISTICS (V＋=3.5V, Crefin=10pF,Cref=1µＦ, f=1kHz, Ta=25°C unless otherwise noted) ● SUPPLY PARAMETER Operating Current Reference Voltage SYMBOL ICC Vref TEST CONDITION RL=∞ RL=∞ MIN. TYP. MAX. UNIT TEST CIRCUIT 1.45 5.0 1.55 7.5 1.65 mA V 1 1 MIN. TYP. MAX. UNIT TEST CIRCUIT - 1.0 6.0 mV 3 - 100 300 nA 3 60 80 - dB 3 -3.0 0 - dBV ( 0.7 ) ( 1.0 ) (-) (Vrms) 0.55 to 2.55 - - V -100 -90 dBV ● OP-AMP SECTION PARAMETER SYMBOL TEST CONDITION Input Offset Voltage VIO Input Bias Current IIB Voltage Gain 1 GV1 RL≤10kΩ Maximum Output Voltage Swing 1 VOM1 THD=1%, RL≥2.5kΩ Input Common Mode Voltage Range VICM Output Noise Voltage VON1 Rs=600Ω / A-Weighted CMR RS≤10kΩ 60 74 - dB 3 SVR RS≤10kΩ 60 80 - dB 3 - 2 - MHz - Common Mode Rejection Ratio Supply Voltage Rejection Ratio Gain Bandwidth Product -2- GB RS≤10kΩ - - ( 10.0 ) ( 30.0 ) (µVrms) 2 1 NJM2172 ● EVR SECTION PARAMETER (VCNT=2.7V, RL=100Ω unless otherwise noted) SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT TEST CIRCUIT Voltage Gain 2 GV2 VIN = -10dBV -6.0 -3.0 0.0 dB 1 Total Harmonic Distortion THD VIN = -10dBV - 0.15 1.0 % 2 EVR Gain GEVR 80 90 - dB 1 Output Noise Voltage 2 VNO2 RS = 600Ω / A - Weighted -95 -85 dBV (18.0) (56.0) (µVrms) Maximum Output Voltage Swing 2 VOM2 THD = 1% Channel Separation CS A/B1 EVR Deviation A/B2 VIN=-10dBV/VCNT=2.7Vto GND VIN=-10dBV / A - Weighted VCNT=1.5V,VINA=VINB=-50dBV f=1kHz, A/B ; *1 VCNT=2.0V,VINA=VINB=-50dBV f=1kHz, A/B ; *1 -5.0 -3.0 ( 0.56 ) ( 0.71 ) - -3.0 - dBV (Vrms) -79 -70 dBV ( 110 ) ( 320 ) (µVrms) 0.0 3.0 dB -3.0 0.0 1 2 1 1 3.0 *1: Ach Amp with Bch=0dB -3- NJM2172 ■ TEST CIRCUIT 1 1µ SW3 10k A-Weight 2.5k V VO1 SW4 SW1 1µ SW5 a VREF 47µ A-Weight VO2 b 100 SW2 600 1 VI1 2 3 10µ 1µ V V 10 4 9 8 VCA OPAMP VREF AMP EVR AMP EVR Control EVR 1 2 3 4 5 Ach 1 2 3 4 5 pin Bch 14 13 12 11 6 pin 5 VCNT Fig.1 Test circuit 1 shows only Ach. -4- 7 A ICC + V 47µ NJM2172 ■ TEST CIRCUIT 2 1µ 10k 2.5k SW6 1µ 10k VO3 V 47µ 20k VO4 1 2 3 1µ V 100 SW7 VI2 10µ 10 4 9 8 VCA OPAMP EVR AMP VREF AMP EVR Control EVR 1 2 3 4 5 Ach 1 2 3 4 5 pin Bch 14 13 12 11 6 pin 5 VCNT 7 + V 47µ Fig.2 Test circuit 2 shows only Ach. -5- NJM2172 ■ TEST CIRCUIT 3 Ec 50 50k 50 NULL 50k 10k 10k 10k 10k Ek SW9 VF V 10µ 1µ SW8 2 1 VCC 10 3 9 8 VCA OPAMP EVR EVR AMP VREF AMP EVR Control 1 2 3 5 Ach 1 2 3 5 pin Bch 14 13 12 6 pin 5 7 + V Fig.3 Test circuit 3 shows only Ach. -6- 47µ NJM2172 ■ PIN INFORMATION Pin No. 1 2 Pin Name OP+IN A OP-IN A Function Ach OP-AMP + Input Ach OP-AMP - Input 3 4 5 6 7 8 OPOUTA EVROUT A VCNT A VCNT B + V GND Ach OP-AMP Output / EVR Input Ach EVR Output Ach EVR Control Bch EVR Control Power Supply GND 9 VREF Internal Reference Output 10 11 12 REFIN EVROUT B OPOUT B Internal Reference Input Bch EVR Output Bch OP-AMP Output / EVR Input 13 14 OP-IN B OP+IN B Bch OP-AMP - Input Bch OP-AMP + Input -7- NJM2172 ■ EQUIVALENT CIRCUIT Term. No. Term. Name Equivalent Circuit Terminal Voltage Note 1.55V - 1.55V OPOUTA / OPOUTB Load: 1.55V EVROUTA / EVROUTB Load: V+ 1 2 13 14 OP+INA OP-INA OP-INB OP+INB 2,13 1,14 V+ 100 3 12 14k OPOUTA OPOUTB RL≥2.5kΩ 3,12 V+ 10 4 11 -8- EVROUTA EVROUTB 4,11 RL≥100Ω NJM2172 Term. No. Term. Name Equivalent Circuit Terminal Voltage Note - Input EVR control voltage V+ 5,6 5 6 VCNT A VCNT B 154k 26k V+ 40k 10 9 10 VREF REFIN 9 52k Terminal Voltage is - 52 / (52+40)× + (V - VBE) RL≥2KΩ -9- NJM2172 ■ APPLICATION CIRCUIT 1 Voltage follower 10k 47µ 1µ 10µ VIN 1µ RL 1 2 3 10 4 9 8 VCA EVR AMP OPAMP VREF AMP EVR Control EVR 1 2 3 4 5 Ach 1 2 3 4 5 pin Bch 14 13 12 11 6 pin 7 5 VCNT Fig.4 Application circuit 1 shows only Ach. - 10 - + V 47µ NJM2172 ■ APPLICATION CIRCUIT 2 Invert Circuit (Gv=6dB) 10k 1µ 10k 47µ 20k 10µ VIN 1µ RL 2 1 3 10 4 9 8 VCA OPAMP EVR AMP EVR 1 VREF AMP EVR Control 2 3 4 5 Ach 1 2 3 4 5 pin Bch 14 13 12 11 6 pin 7 5 VCNT + V 47µ Fig.5 Application circuit 2 shows only Ach. - 11 - NJM2172 ■ TYPICAL CHARACTERISTICS Quiescent Current vs. Supply Voltage Ta=25°C Internal Reference Voltage vs. Supply Voltage Ta=25°C 3.0 8.0 VREF [V] ICC [mA] 6.0 4.0 2.0 1.0 2.0 0.0 0.0 2.5 3.0 3.5 4.0 4.5 5.0 2.5 5.5 3.0 3.5 4.0 4.5 5.0 5.5 V+ [V] V+ [V] Internal Reference Voltage vs. Temperature V+=3.5V Quiescent Current vs. Temperature V+=3.5V 3.0 8.0 6.0 VREF [V] ICC [mA] 2.0 4.0 1.0 2.0 0.0 0.0 -50 0 50 -50 100 0 50 100 Ta [°C] Ta [°C] Input Offset Voltage vs. Supply Voltage Ta=25°C Input Bias Current vs. Supply Voltage Ta=25°C 3.0 300 200 1.0 IB [nA] VIO [mV] 2.0 0.0 -1.0 100 -2.0 0 -3.0 2.5 3.0 3.5 4.0 4.5 5.0 2.5 5.5 3.0 3.5 4.0 4.5 5.0 5.5 V+ [V] V+ [V] Input Offset Voltage vs. Temperature V+=3.5V Input Bias Current vs. Temperature V+=3.5V 3.0 300 1.0 200 IB [nA] VIO [mV] 2.0 0.0 100 -1.0 -2.0 0 -3.0 -50 0 50 Ta [°C] - 12 - 100 -50 0 50 Ta [°C] 100 NJM2172 Voltage Gain 1 vs. Frequency V+=3.5V,Ta=25°C,RL=2.5kΩ Voltage Gain 1 / Phase vs. Frequency V+=3.5V,Ta=25°C,RL=2.5kΩ,40dB Inverted Amp 100 60 GV1 [dB] 50 60 40 Phase -30 Gain -90 40 30 20 -150 10 20 0 0 0.001 -10 0.01 0.1 1 10 100 1000 10000 0.1 1 10 f [kHz] 100 1000 -210 10000 ｆ [kHz] Voltage Gain1 vs. Temperature V+=3.5V Common Mode Rejection Ratio vs. Temperature V+=3.5V 150 150 100 100 CMR [dB] GV1 [dB] φ [° ] 80 GV1 [dB] 30 70 50 0 50 0 -50 0 50 100 -50 0 50 Ta [°C] 100 Ta [°C] Total Harmonic Distortion (OPAMP) vs. Output Level (Temperature) V+=3.5V,f=1kHz,BW=400Hz-30kHz Supply Voltage Rejection Ratio vs. Temperature V+=3.5V 150 10 THD [%] SVR [dB] 1 100 50 0.1 85°C,25°C 0.01 -40°C 0.001 0 -50 0 50 Ta [°C] 100 -60 -40 -20 0 20 Output Level [dBV] - 13 - NJM2172 Maximum Output Voltage 1 vs. Supply Voltage RL=2.5kΩ,f=1kHz,THD=1%,Ta=25°C Maximum Output Voltage 1 vs. Load Resistance V+=3.5V,f=1kHz,THD=1%,Ta=25°C 10.0 VOM１ [dBV] VOM１ [dBV] 10.0 0.0 -10.0 0.0 -10.0 -20.0 -20.0 2.5 3.5 4.5 0.1 5.5 1 V+ [V] 20 20 0 0 -20 -20 -40 -60 -40 -80 -80 -100 -120 -120 1 1.5 2 2.5 2.7V -60 -100 0.5 3 3.5V,5.5V 0 0.5 1 VCNT [V] 2 2.5 3 Voltage Gain 2 / Temperature vs. EVR Control Voltage V+=3.5V,f=1kHz,Vin=-10dBV 20 20 0 0 -20 -20 GV2 [dB] GV2 [dB] 1.5 VCNT [V] Voltage Gain 2 / Frequency vs. EVR Control Voltage V+=3.5V,Vin=-10dBV,Ta=25°C -40 -60 10kHz -80 -40 85°C -60 -80 -100 25°C -100 １kHz,100Hz -120 -40°C -120 0 0.5 1 1.5 VCNT [V] - 14 - 100 Voltage Gain 2 / Supply Voltage vs. EVR Control Voltage f=1kHz,Vin=-10dBV,Ta=25°C GV2 [dB] GV2 [dB] Voltage Gain 2 vs. EVR Control Voltage V+=3.5V,f=1kHz,Vin=-10dBV,Ta=25°C 0 10 RL [kΩ] 2 2.5 3 0 0.5 1 1.5 VCNT [V] 2 2.5 3 NJM2172 Total Harmonic Distortion (EVR) vs. Output Level (Frequency) V+=3.5V,Ta=25°C Total Harmonic Distortion (EVR) vs. Output Level (Temperature) V+=3.5V,f=1kHz,BW=400Hz-30kHz 10 f=10kHz BW=22Hz-80kHz 1 THD [%] THD [%] 10 0.1 1 -40°C 25°C 0.1 85°C f=100Hz,1kHz BW=22Hz-22kHz 0.01 0.01 -60 -40 -20 0 20 -60 Output Level [dBV] -20 20 Output Noise Voltage 2 vs. Temperature V+=3.5V,VCNT=2.7V,A-Weighted 0 -20 -20 -40 -40 VNO2 [dBV] 0 -60 -80 -100 -60 -80 -100 -120 -120 0 1 2 -50 3 0 VCNT [V] 50 100 Ta [°C] Maximum Output Voltage 2 vs. Supply Voltage RL=100Ω,f=1kHz,THD=1%,Ta=25°C Maximum Output Voltage 2 vs. Load Resistance V+=3.5V,f=1kHz,THD=1%,Ta=25°C 10.0 10.0 0.0 0.0 VOM2 [dBV] VOM2 [dBV] 0 Output Level [dBV] Output Noise Voltage 2 vs. EVR Control Voltage V+=3.5V,Ta=25°C,A-Weighted VNO2 [dBV] -40 -10.0 -20.0 -10.0 -20.0 2.5 3.5 4.5 V+ [V] 5.5 0.01 0.1 1 10 RL [kΩ] - 15 - NJM2172 Channel Separation vs. Supply Voltage VCNT=2.7V,Vin=-10dBV,f=1kHz,Ta=25°C,A-Weighted 0 0 -20 -20 -40 -40 -60 B CS [dBV] CS [dBV] Channel Separation vs. EVR Control Voltage V+=3.5V,Vin=-10dBV,f=1kHz,Ta=25°C,A-Weighted A -80 -100 A -60 -80 -100 B -120 1 2 3 2.5 3 3.5 VCNT [V] A B 4 4.5 5 5.5 V+ [V] Channel Separation vs. EVR Control Voltage V+=3.5V,Vin=-50dBV,f=1kHz,Ta=25°C,A-Weighted EVR Deviation vs. Supply Voltage VCNT=2.7V,Vin=-50dBV,f=1kHz,Ta=25°C,A-Weighted 3 3 2 2 1 1 AB [dB] CS [dBV] A -120 0 0 -1 0 VCNT=1.5V,2V -1 -2 -2 -3 -3 0 1 2 3 2.5 3 3.5 VCNT [V] 2 2 1 1 AB [dB] 3 0 VCNT=1.5V,2V -3 0.01 -3 f [kHz] 5.5 10 100 VCNT=1.5V -1 -2 1 5 0 -2 0.1 4.5 EVR Deviation vs. Temperature V+=3.5V,Vin=-50dBV,f=1kHz,VCNT=2.7V,A-Weighted 3 -1 4 V+ [V] EVR Deviation vs. Frequency VCNT=2.7V,Vin=-50dBV,Ta=25°C AB [dB] B VCNT=2V -50 0 50 100 Ta [°C] [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. - 16 -