OP Amp. with 3 Inputs Selector - BA3131FS

The BA3131FS features two switching audio amps, a 3-system differential input circuit, and a single-system output circuit. The 3-system differential input circuit can be controlled independently, and its gain and frequency properties can be arbitrarily set.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BA3131FS-E2 Active SSOP-A20 2000 2000 Taping Yes
Vcc(Min.)[V] 6.0
Vcc(Max.)[V] 16.0
Iq[mA] 4.9
I/F Stand alone
Number of Line Outputs STEREO
Line Output Type DC Bias
Line THD+N[%] 0.0025
Line SNR[dB] 114.0
Line PSRR[dB] 90.0
Input Type Differencial
Output Voltage 1.4
Output Noise[µVrms] 2
Open loop Gain[dB] 110.0
Number of Inputs 3
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • ・High gain and low distortion. (Gv = 110dB, THD = 0.0015% typ.)
    ・Low noise. (Vn = 2μVrms typ.)
    ・Switching circuit can be directly coupled to microcomputer port.
    ・Small switching noise.
    ・Equipped with 1 / 2 Vcc output circuit for single power supply.
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Technical Data
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.