2-channel head switch for radio cassette recorders
Audio ICs
2-channel head switch for radio cassette recorders
BA3126F / BA3126N
The BA3126F and BA3126N are dual-channel...
Description
Audio ICs
2-channel head switch for radio cassette recorders
BA3126F / BA3126N
The BA3126F and BA3126N are dual-channel tape head switching ICs designed for use in radio cassette players. These ICs are designed to withstand voltages of up to 120VP-PMin., and can handle large-amplitude bias signals during recording. Both devices have two channels, and are ideal for use in radio-cassette players. The package types are 14-pin SOP for the BA3126F, and 9-pin SIP for the BA3126N.
FApplications Radio-cassette players
FFeatures 1) High withstanding voltage (120VP-PMin. at f = 100kHz). 2) Low “on” resistance (P / B SW : 8Ω, REC SW : 5Ω)
3) Low offset voltage (P / B SW : 5.0mV, REC SW : 0.6mV)
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
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Audio ICs
FBlock diagram
BA3126F / BA3126N
FInternal circuit configuration
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Audio ICs
BA3126F / BA3126N
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 9.0V, measurement circuit : Figs. 7 and 8).
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Audio ICs
FMeasurement circuit
BA3126F / BA3126N
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Audio ICs
FCircuit operation (1) Playback mode When the control pin voltage goes below 0.5V, the REC SW goes off and the P / B SW goes on to put the IC into playback mode. In this mode, the playback signal from the head is sent to the P / B amplifier via the REC SW. FOperation notes (1) When the voltage on the control pin drops below 0.5V, (pin 5 for the BA3126F, and pin 4 for the BA3126N) the IC switches to P / B mode...
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