LB1409中文資料三洋數(shù)據(jù)手冊PDF規(guī)格書

Functions

? Display

Nine red or green LEDs display the input level in the shape of a bar.

? Input amplifier

Wide application is available owing to built-in DC amplifier

whose gain is variable with external resistors.

? Comparator level

Setting is made by steps of 3 dB as follows.

–18 dB, –15 dB, –12 dB, –9 dB, –6 dB, –3 dB, 0 dB, +3 dB, +6 dB

? Supply voltage

The recommended supply voltage range is so wide as 5.5 V to 16 V. (If pin Vref 2 is used, 7 V to 16 V.)

? Reference voltage

Constant voltage output is available with external transistor owing to pin Vref 2 = 5 V.

Applications

? AC level meters such as VU meters.

? DC level meters such as signal meters.