msm7708-02 Oki Semiconductor, msm7708-02 Datasheet - Page 19

• Manufacturer Part Number: msm7708-02
• Description: Serial Register Interface Adpcm Codec For Telephone Recording
• Manufacturer: Oki Semiconductor

¡ Semiconductor
AC Characteristics (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 unit 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 (Voice/Silence Detect Function)
Transmit Voice/Silence
Detection Time
Transmit Voice
Detection Level Accuracy
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
R
T
N
T
N
A
D
D
A
D
V
V
V
SRRR
V
VXON
SRRT
DTMF
VXOF
IDLT
IDLR
D
VR
FT1
FT2
RH
VT
TH
RL
VX
TL
G
Frequency (Hz)
Noise frequency:
DTMF tones, Other various tones
Tone scale
Transmit side tone
(Gain setting 0 dB)
Receive side tone
(Gain setting –6 dB)
V
SilenceÆvoice
VoiceÆsilence
For detection level set values by
CRM6 - B6, B5
For all gain set values
TH
0 to 50 kHz
/V
1020
TL
—
—
, V
RH
/V
RL
Condition
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 mVpp
(*2)
0
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.
–1.5
–1.0
Min.
–2.5
–18
–16
–10
—
—
30
30
—
–8
–1
1
0.320
0.320
Typ.
Typ.
Typ.
Typ.
–16
–14
—
—
—
—
—
—
–8
–6
5
0
2
0
MSM7708-02
(–75.7) dBmOp
(–79.7)
Max.
0.359
0.359
Max.
Max.
Max.
+1.5
+1.0
–68
–72
–14
–12
2.5
—
—
—
–6
–4
+1
3
19/38
(dBmp)
dBm0
dBm0
dBm0
dBm0
Vrms
Vrms
Unit
Unit
Unit
Unit
ms
ms
dB
dB
dB
dB
dB
%
%