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BA3131FS - BA3131FS
BA3131FS
Dual operational amplifier with switch, audio inputs output
BA3131FS
BA3131FS contains built-in circuits with operational amplifiers configured three differential input circuits, output circuit, switch circuit. three differential input circuits separate, enabling independent settings entered gain frequency characteristics.
!Applications stereos, audio amplifiers other electronic circuits
!Features High gain distortion. 110dB, 0.0015% typ.) noise. 2µVrms typ.) Switching circuit directly coupled microcomputer port. Small switching noise. Equipped with output circuit single power supply.
!Block diagram
IN1A
IN2A
IN1A
IN2A
IN1B
IN2B
IN1B
IN2B
IN1C
IN2C
IN1C
IN2C
OUT1
OUT2
Vref
BA3131FS
!Absolute maximum ratings (Ta=25°C)
Parameter
Power supply voltage Power dissipation Operating temperature Storage temperature Common-mode input voltage Differential input voltage Load current
Symbol Topr Tstg IoMax.
Limits 18.0 50.0
Unit
Reduced 7.5mW each increase
over 25°C. (When mounted glass epoxy board (90mm 50mm 1.6t))
!Recommended operating conditions (Ta=25°C)
Parameter Operating power supply voltage Symbol Min. Typ. Max. 16.0 Unit Conditions single power source
!Electrical characteristics (unless otherwise noted, Ta=25°C, Vcc=8V)
Parameter
Quiescent current Input offset voltage Input offset current Input bias current High-amplitude voltage gain Common-mode input voltage In-phase signal rejection ratio Power supply voltage rejection ratio Maximum output voltage Input conversion noise voltage Reference voltage change
Symbol Avol Vicm CMRR PSRR VREF
Min.
Typ.
Max.
Unit µVrms
Conditions
open
Measurement circuit Fig.2 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1
1.5V
Fig.1 Fig.1 Fig.3 Fig.4 Fig.7
Ioref
Because first stage contigured with transistors, input bias current from
Tested under following conditions: 40dB, Matsushita Tsuko VP-9690A (using audio filter)
!Design guaranteed values (unless otherwise noted, Ta=25°C, Vcc=8V)
Parameter
Slew rate Gainbandwidth product Crosstalk between Total harmonic distortion Channel separation
Symbol CTABC
Min.
Typ.
Max.
Unit
Conditions
Measurement circuit Fig.5 Fig.6 Fig.8 Fig.9 Fig.10
0dB, 10kHz 1kHz 0dB, 1kHz, 1Vrms
1kHz, input conversion
0.0025 0.01
This item guaranteed during processes.
BA3131FS
!Measurement circuit
0.1µF
500k
0.1µF 500k NULL
1000pF
Vref
Vref
Vref
used prevent oscillation (adjustment required)
Fig.1
BA3131FS
!Measurement conditions (Figure
Measurement Item Input offset voltage Input offset current Input bias current
Vref Vref Vref
VF10
Equation
High-amplitude voltage gain Common-mode signal rejection ratio (Common-mode input voltage) Power supply voltage rejection ratio
Vref Vref Vref
!Equations Input offset voltage (Vio) Input offset current (Iio) Input bias current (Ib) High-amplitude voltage gain (Avol) Avol 20log (dB) In-phase signal rejection ratio (CMRR) CMRR 20log (dB) (In-phase input voltage range) (PSRR) PSRR 20log VF10 (dB)
BA3131FS
!Measurement circuits
Vref
Vref
Vref
Vref
Fig.2
Fig. Maximum output voltage: High
VOUT
Vref
Vref
Vref
Vref
Fig. Maximum output voltage:
Fig. Slew rate
Vout
(µsec)
0.1µF 10µF
10kHz
Vref
Fig. Slew rate
Fig. Band width frequency gain
BA3131FS
100k
100k
3.3µF 0.47µF
100k
2.2k 100k
B.P.F 20Hz 30kHz
Vref
100k
100k
Vref
Vref 100k 47µF
Vref
100k Vref CTABC 20log
1kHz Vref
Channel selection
Fig. Input conversion noise voltage
Fig. Crosstalk between
3.3µF
0.47µF Distortion meter 100k
100k
2.2k 1kHz
Vref
CH-1
Vref 1Vrms
Vref Vref 100k
Fig. Total harmonic distortion
Fig. Channel separation
100k
Vref
1kHz
CH-2
100k 100Vo2
Vref
20log
Fig. Channel separation
BA3131FS
!Application example
Aamp: 20dB Bamp: 10dB Camp:
3.3µ IN2C IN2B IN2A 3.3µ 3.3µ
OUT2 3.3k
100µ
BA3131FS
100µ
0.022µ
3.3µ IN1A IN1B IN1C 3.3µ 3.3µ 3.3k OUT1
µCOM.
Fig.13
BA3131FS
!Operation notes reference output pin, from which output. value bypass capacitor should determined based desired characteristics. value between 500pF produce oscillation, grounding being used, always bypass capacitor with value least 10µF. Also, designated reference circuit input, reference output being used, always bypass capacitor grounding. recommend bypass capacitor with value 22µF.) data (these values intended only reference, performance guaranteed)
bypass capacitor (µF) Ripple rejection ratio (fIN (dB) Output rise time (ms)
capacitor 100µF, output smoothing voltage.
Test conditions: When power supply (VCC 8V), time equal bypass capacitor,Pin bypass
This offers stability even gain 20dB), capacitance load 200pF higher cause oscillation (the phase margin capacitance 200pF typ. 85°C, point) Consequently, please make sure sufficient care taken terms capacitance load. When using buffer, shown application example (Figure 13), introducing bias resistance several negative input (R11 Figure indicated circled items) results greater stability terms capacitance load.
!Truth value table
(8pin) (9pin)
Conditions
Corresponds µCOM output
when applied voltage pins 2.0V more, when 1.0V less.
BA3131FS
!Electrical characteristic curves
1Vrms
C.S., CTABC (dB)
DISTN (THD
0.05
DISTN (THD
0.05
CTABC
1Vrms C.S.
0.01 0.005
0.01 0.005
10kHz 1kHz 100Hz
0.00
FREQUENCY: (Hz)
0.001
0.05
FREQUENCY: (Hz)
OUTPUT VOLTAGE: (Vrms)
Fig. Distortion frequency
Fig. Channel separation crosstalk frequency
Fig. Distortion output voltage
REFERENCE VOLTAGE :Vref
SINK SOURCE
13pin OUTPUT CURRENT: IOUT (mA)
Fig. Reference voltage output current
!External dimensions (Units:
0.11
0.36
0.3Min. 0.15
SSOP-A20
0.15
Appendix
Notes
technical content pages this document reproduced form transmitted means without prior permission ROHM CO.,LTD. contents described herein subject change without notice. specifications product described this document reference only. Upon actual use, therefore, please request that specifications separately delivered. Application circuit diagrams circuit constants contained herein shown examples standard operation. Please careful attention peripheral conditions when designing circuits deciding upon circuit constants set. data, including, limited application circuit diagrams information, described herein intended only illustrations such devices specifications such devices. ROHM CO.,LTD. disclaims warranty that such devices shall free from infringement third party's intellectual property rights other proprietary rights, further, assumes liability whatsoever nature event such infringement, arising from connected with related such devices. Upon sale such devices, other than buyer's right such devices itself, resell otherwise dispose same, express implied right license practice commercially exploit intellectual property rights other proprietary rights owned controlled ROHM CO., LTD. granted such buyer. Products listed this document silicon basic material. Products listed this document antiradiation design.
products listed this document designed used with ordinary electronic equipment devices (such audio visual equipment, office-automation equipment, communications devices, electrical appliances electronic toys). Should intend these products with equipment devices which require extremely high level reliability malfunction with would directly endanger human life (such medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers other safety devices), please sure consult with sales representative advance. About Export Control Order Japan Products described herein objects controlled goods Annex (Item Export Trade Control Order Japan. case export from Japan, please confirm applies "objective" criteria "informed" MITI clause) basis "catch controls Non-Proliferation Weapons Mass Destruction.
Appendix1-Rev1.0
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