SM1 RFSOLUTIONS | Alldatasheet
Document overview
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Technical content
The SM1 is a high performance sound level meter with q SON twelve led drivers. ge, © Sg Design for professional audio mixers and other audio ig i, ON applications. SEA Features Applications ¢ Internal full wave audio rectifier ¢ Fine Musical Instruments + Costant current led driver + Guitar / Keyboard Amplifier « SIL Package * Audio Mixer «Thick film hybrid technology + Karaoke Systems BLOCK DIAGRAM | 18] Dt 17] D2 16] D3. 15] D4 14] ps 13] Dé | 3 | ; : i : : ; +Voc | Driver Driver Driver Driver Driver Driver | 1 2 3 4 5 6 | 20 | ILed TIN HCO Le eo a a Vee | lo se slow 9 |p10 clos 7 lo ; J
Electrical Characteristics Ta = 25°C unless otherwise specified L Level Indicator 24 eee dB Pin Description Mechanical Dimensions
1 GND — Ground :
2 -VCC Negative Supply Voltage 3 +VCC Positive Supply Voltage . 50.8 mm —>
4 HCO Hold Capacitor Output
5 IN Input Signal ak t
6 Vref Voltage Reference Comparator .
7 D12 Output led 12 Components Side | 824mm
8 D11 Output led 11 : fara: |
9 D10 Output led 10 r . 10 bg Output led 9 IMT ] ah D8 Output led 8
12 D7 Output led 7 \\2 54mm
13 D6 Output led 6
14 DS Output led 5
15 D4 Output led 4
16 D3 Output led 3
17 D2 Output led 2
18 D1 Output led 1
20 ILed —_ Led Current Set
+ Vee = Vee | 470 | 47 : SET LED CURRENT fi “100K | o—ZE} 5 2 3 6 2 i | | | iT ignal | | 47K Input Signal SM1 | 4nF] ji 7 8 9 @ 1 2 8 4 8 6 oe —— — _ I i | LED INDICATORS % - Veo Component typical values * Resistor for set gain R.F. Solutions Ltd.. Unit 21. Cliffe Industrial Estate. e South Street Lewes. E Suscex. BN8 8JL. England. Tel +44 (0)1273 695 000. Fax +44 (0)1273 450 661. RF Solutions is a member of the Low Power Radio Association.