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參數(shù)資料
| 型號： | U3900BM |
| 英文描述： | Programmable Telephone Audio Processor |
| 中文描述： | 程控電話音頻處理器 |
| 文件頁數(shù)： | 22/34頁 |
| 文件大?。?/td> | 762K |
| 代理商： | U3900BM |
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U3900BM
Target Specification
Rev. A2, 25-Aug-98
29 (34)
Electrical Characteristics (continued)
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Fig.
Output noise
(input AMPB open)
psophometrically
weighted
IL > 15 mA
nSA
240
mVpsoph
Gain deviation
IL = 15 mA
Tamb = –10 to +60°C
DGSA
±1
dB
Mute suppression
IL = 15 mA, VL = 0 dBm,
VAMPB = 4 mV, I5O2 = 0
VSAO
60
dB
Gain change with
current
IL = 15 to 100 mA
DGSA
±1
dB
Gain change with
frequency
IL = 15 mA f = 3.4 kHz
DGSA
–1
0
dB
Attack time of
anti-clipping
20 dB over drive
tr
5
ms
Release time of
anti-clipping
tf
80
ms
Charge current
Pin SAO2
ENSAO = 0, SE = 1
LSCUR[0:1] = 3
ICHA
–1.45
–1.2
–0.95
mA
Discharge current
Pin SAO2
ENSAO = 0, SE = 0
LSCUR[0:1] = 3
IDIS
0.95
1.2
1.45
mA
Adjustment step of
charge current
ENSAO = 0, SE = 1
DLSCUR[0:1] = 1
–480
–400
–320
mA
Adjustment step of
discharge current
ENSAO = 0, SE = 0
DLSCUR[0:1] = 1
320
400
480
mA
Microphone amplifier,
VB = 5 V, VMIC = 2 mV, VMIC3 = 2 mV, ENMIC = ENCT = I1O4 = 1, MICHF = 0
Gain MIC Amp.:
MIC1/2
→ CEAR
MICG[0:1] = 0
18.4
19
19.6
dB
MICG[0:1] = 1
24.4
25
25.6
dB
MICG[0:1] = 2
30.4
31
31.6
dB
MICG[0:1] = 3
36.4
37
37.6
dB
MIC3
→ CEAR
MICHF = 1, MICG[0:1] = 3
36.4
37
37.6
dB
Input suppression:
MIC3
→ MIC1/2
MICG[0:1] = 3, MICHF = 0
60
dB
MIC1/2
→ MIC3
MICHF = 1
60
dB
Settling time
offset-cancellers, 5
t
FOFFC = 0
9
12
ms
Settling time offset-
cancellers in speed-up
mode, 5
t
FOFFC = 1
1.8
2.4
ms
AGC for answering machine, AMPB
→ AMREC,
ENAM = I5O5 = 1
Nominal gain
VAMPB = 5 mV
–1
0
1
dB
Max. output level
VAMPB = 50 mV, d< 5%
160
200
240
mVp
Attack time
20 dB overdrive
2
ms
Release time
100
ms
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