ST5090 ST Microelectronics, ST5090 Datasheet - Page 16

• Manufacturer Part Number: ST5090
• Description: LOW VOLTAGE 14-BIT LINEAR CODEC WITH HIGH-PERFORMANCE AUDIO FRONT-END
• Manufacturer: ST Microelectronics

ST5090
Table 12: Examples of Usual Frequency Selection (Standard frequency tone range)
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Tone 250 Hz
Tone 330 Hz
Tone 425 Hz
Tone 440 Hz
Tone 800 Hz
Tone 1330 Hz
DTMF 697 Hz
DTMF 770 Hz
DTMF 852 Hz
DTMF 941 Hz
DTMF 1209 Hz
DTMF 1336 Hz
DTMF 1477 Hz
DTMF 1633 Hz
SOL
LA
SI
DO
RE
MI flat
MI
FA
FA sharp
SOL
SOL sharp
LA
SI
DO
RE
MI
Description
f1 value (decimal)
102
170
109
120
155
171
189
209
100
106
113
126
134
150
169
32
42
54
56
89
99
50
56
63
67
75
80
84
89
95
Theoretic value (Hz)
1174.66
523.25
587.33
622.25
659.25
1046.5
1318.5
698.5
830.6
987.8
1330
1209
1336
1477
1633
250
330
425
440
800
697
770
852
941
392
440
494
740
784
880
Typical value (Hz)
1328.1
1210.9
1335.9
1476.6
1632.8
1046.9
1171.9
1320.4
328.2
421.9
437.5
796.9
695.3
773.4
851.6
937.5
390.6
437.5
492.2
523.5
586.0
625.0
656.3
695.3
742.2
781.3
828.2
882.9
984.4
250
Error %
–.56
–.73
–.56
–.39
–.14
–.24
+.44
–.05
–.37
+.16
–.01
–.30
–.56
–.34
+.04
–.23
+.45
–.45
–.45
+.30
–.34
–.29
+.33
–.34
+.04
–.23
+.14
.00
.00
.00