MSM7570L-01/02
¡ Semiconductor
AC Characteristics (DTMF and Other Tones)
(VDD = 2.7 V to 3.6 V, Ta = –25°C to +70°C)
Parameter
Symbol
Condition
Min.
–7
Typ.
—
Max.
+7
Unit
Hz
DFT1 DTMF Tones
DFT2 Other Tones
VTL
Frequency Difference
–7
—
+7
Hz
DTMF (Low)
–18
–16
–14
dBm0
Transmit Tones
DTMF (High)
and Other Tones
DTMF (Low)
VTH
VRL
VRH
(Gain setting 0dB)
–16
–10
–8
–14
–8
–12
–6
dBm0
dBm0
dBm0
Original (reference)
Tone Signal Level
*4
Receive Tones
(Tone generator
gain setting –6dB)
DTMF (High)
and Other Tones
–6
–4
Relative Level of
DTMF Tones
RDTMF VTH/VTL, VRH/VRL
1
2
3
dBm0
*4 Does not contain the setting value set for the programmable gain
AC Characteristics (Programmable Gain Stages)
(VDD = 2.7 V to 3.6 V, Ta = –25°C to +70°C)
Parameter
Gain Accuracy
Symbol
Condition
Min.
Typ.
Max.
Unit
DG
All gain stages, to programmed value
–1
0
+1
dB
AC Characteristics (VOX Function)
(VDD = 2.7 V to 3.6 V, Ta = –25°C to +70°C)
Parameter
Transmit VOX Detect Time
(Voice Signal ON/OFF Detect Time
Transmit VOX Detect Level
Accuracy
Symbol
tVXON
Condition
VOXO,
See Fig.2
Min.
Typ.
10 *5
Max.
Unit
OFF Æ ON
ON Æ OFF
—
—
ms
)
tVXOF
150/310 160/320 170/330 ms
D
VX
–2.5
0
+2.5
dB
To the values (CR6-B6, B5)
(Threshold Level)
*5 When single tone is input at 1000Hz
15/26
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