msm7584c Oki Semiconductor, msm7584c Datasheet - Page 28

• Manufacturer Part Number: msm7584c
• Description: Pi /4 Shift Qpsk Modem/adpcm Codec
• Manufacturer: Oki Semiconductor

¡ Semiconductor
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)
*1 Not including programmable gain set values
AC Characteristics (Gain Settings)
AC Characteristics (VOX Function)
Transmit VOX
Detection Time
(Voice and Silence
Detection Time)
Transmit VOX
Detection Level Accuracy
(Voice Detection Level)
Idle Channel Noise
(*1)
Absolute Level (*3)
Power Supply Noise
Rejection Ratio
Frequency Deviation
Tone Reference
Output Level
(*1)
DTMF Tone Level Relative Value
Transmit/Receive Gain
Setting Accuracy
Parameter
Parameter
Parameter
Parameter
Symbol
Symbol
Symbol
Symbol
P
P
N
T
N
R
T
A
A
D
D
D
SRRT
SRRR
V
VXON
V
V
V
VXOF
IDLR
DTMF
IDLT
D
VR
VT
FT1
FT2
VX
RH
TL
TH
RL
G
Frequency (Hz)
Noise frequency:
0 kHz to 50 kHz
SilenceÆvoice
VoiceÆsilence
For detection level set values by
CR6 - B6, B5
DTMF tones
Other various tones
Transmit side tone
Receive side tone
V
For all gain set values
TH
/V
1020
TL
—
—
, V
RH
/V
Condition
RL
VOXO pin: See Fig. 2
Voice/silence
differential: 10 dB
Condition
Condition
Condition
DTMF (low group)
DTMF (high group), other
DTMF (low group)
DTMF (high group), other
Level dBm0
Noise level:
AIN = SG
50 mV
(*2)
0
PP
Other
GSX2
VFRO
—
—
—
(V
(V
(V
(V
DD
DD
DD
DD
= 2.7 V to 3.6 V, Ta = –25°C to +70°C)
= 2.7 V to 3.6 V, Ta = –25°C to +70°C)
= 2.7 V to 3.6 V, Ta = –25°C to +70°C)
= 2.7 V to 3.6 V, Ta = –25°C to +70°C)
140/300 160/320 180/340
0.285
0.285
Min.
Min.
Min.
Min.
–2.5
–18
–16
—
—
30
30
—
–7
–7
–4
–2
–1
1
0.320
0.320
Typ.
Typ.
Typ.
Typ.
–16
–14
—
—
—
—
—
—
–2
5
0
0
2
0
(–75.7) dBm0p
(–79.7)
Max.
0.359
0.359
Max.
Max.
Max.
MSM7584C
–68
–72
–14
–12
2.5
—
—
—
7
7
0
2
3
1
28/57
(dBmp)
Vrms
Vrms
dBm0
dBm0
dBm0
dBm0
Unit
Unit
Unit
Unit
ms
ms
dB
dB
dB
dB
Hz
Hz
dB