BA689 Rohm, BA689 Datasheet
BA689
Available stocks
Related parts for BA689
BA689 Summary of contents
Page 1
... Audio ICs LED level meter driver, 12-point, linear scale, dot or bar display BA689 The BA689 is a monolithic IC for LED level meter applications. The display level range is 0mV vided into 12 equally-spaced points with 25mV to allow use of different color LEDs in various combinations. FApplications ...
Page 2
... Audio ICs FBlock diagram FElectrical characteristics (unless otherwise noted 25_C 12V, and f = 1kHz) CC BA689 657 ...
Page 3
... Audio ICs FMeasurement circuit 658 BA689 ...
Page 4
... Input coupling capacitor ( This capacitor connects the BA689 to external input cir- cuits. The recommended value is 2.2 F. (3) Input bias resistor ( This resistor is the input impedance. If the value is set too large, the DC bias voltage will increase, and the input off- set will increase and have an effect on the comparators ...
Page 5
... LED current is given 1 in Fig. 3. (3) Comparator voltage In the case of the BA689, the comparator voltage is the input voltage when about half LED current setting value (typ.) is flowing in an LED. Therefore, if the LED current is set to 16mA, the comparator voltage is the value when 8mA is flowing in the LED ...
Page 6
... Audio ICs FExternal dimensions (Units: mm) BA689 661 ...