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| Audio ICs LED level meter driver, 5-point, VU scale BA6124 / BA6124F The BA6124 and BA6124F are driver ICs for LED VU level meters in stereo equipment and other display applications. The ICs display the input level (range: *10dB to +6dB) on a 5-point, bar-type LED display. The circuit includes a rectifier amplifier allowing direct AC input, and has constant-current outputs, so it can directly drive the LEDs without variations in LED current due to power supply voltage fluctuations. FApplications VU meters, signal meters, and other display devices. FFeatures 1) Rectifier amplifier allows either AC or DC input. 2) Constant-current outputs for constant LED current when the power supply voitage fluctuates. 3) Built-in reference voltage means that power supply voltage fluctuations do not effect the display. FAbsolute maximum ratings (Ta = 25_C) 4) Wide operating power supply voltage range (3.5V to 16V) for a wide range of applications. 5) Low PCB space requirements. Comes in a compact package and requires few external components. 628 Audio ICs FBlock diagram BA6124 / BA6124F FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 6.0V, and f = 1kHz) FMeasurement circuit 629 Audio ICs FElectrical characteristics curves (Ta = 25_C) BA6124 / BA6124F FExternal dimensions 630 |
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