
Semiconductor
MSM7584C
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AC Characteristics (CODEC) (Continued)
*1 P-message filter used
*2 PCMRI input: "11010101" (A-law), "11111111" (
m
-law)
*3 0.320 Vrms = 0 dBm0 = –7.7 dBm (600
W
)
ADPCM characteristics are fully compliant with ITU-T Recommendation G.721.
AC Characteristics (DTMF and Other Tones)
P
SRRT
Noise frequency:
0 kHz to 50 kHz
P
SRRR
30
30
—
—
—
—
dB
dB
Power Supply Noise
Rejection Ratio
Noise level:
50 mV
PP
—
Parameter
Symbol
Level dBm0
Min.
Typ.
Max.
Unit
(V
DD
= 2.7 V to 3.6 V, Ta = –25°C to +70°C)
Frequency (Hz)
Other
Condition
N
IDLT
—
—
—
–68
(–75.7)
–72
(–79.7)
dBm0p
(dBmp)
N
IDLR
—
—
1020
A
VT
A
VR
0.285
0.285
0.320
0.320
0.359
0.359
0
—
Idle Channel Noise
(*1)
AIN = SG
Vrms
Vrms
GSX2
VFRO
Absolute Level (*3)
(*2)
—
—
*1 Not including programmable gain set values
AC Characteristics (Gain Settings)
D
G
For all gain set values
–1
0
1
dB
Transmit/Receive Gain
Setting Accuracy
Parameter
Symbol
Min.
Typ.
Max.
Unit
(V
DD
= 2.7 V to 3.6 V, Ta = –25°C to +70°C)
Condition
–2.5
dB
T
VXON
Silence
voice
—
5
—
ms
Transmit VOX
Detection Time
(Voice and Silence
Detection Time)
Transmit VOX
Detection Level Accuracy
(Voice Detection Level)
T
VXOF
Parameter
Symbol
Min.
Typ.
Max.
Unit
(V
DD
= 2.7 V to 3.6 V, Ta = –25°C to +70°C)
Condition
140/300
160/320
180/340
ms
Voice
silence
D
VX
For detection level set values by
CR6 - B6, B5
VOXO pin: See Fig. 2
0
2.5
Voice/silence
differential: 10 dB
AC Characteristics (VOX Function)
–18
–16
–4
–2
1
dBm0
dBm0
dBm0
dBm0
dB
D
FT1
D
FT2
V
TL
V
TH
V
RL
V
RH
R
DTMF
DTMF tones
Other various tones
–7
–7
—
—
–16
–14
–2
0
2
7
7
Hz
Hz
Frequency Deviation
Parameter
Symbol
Min.
Typ.
Max.
Unit
(V
DD
= 2.7 V to 3.6 V, Ta = –25°C to +70°C)
Condition
Transmit side tone
Receive side tone
V
TH
/V
TL
, V
RH
/V
RL
Tone Reference
Output Level
(*1)
DTMF Tone Level Relative Value
DTMF (low group)
DTMF (high group), other
DTMF (low group)
DTMF (high group), other
–14
–12
0
2
3