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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)： | 19/34頁 |
| 文件大?。?/td> | 762K |
| 代理商： | U3900BM |
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U3900BM
Rev. A2, 25-Aug-98
Target Specification
26 (34)
14 Technical Data
14.1 Absolute Maximum Ratings
Parameters
Symbol
Value
Unit
Line current
IL
140
mA
DC line voltage
VL
12
V
Maximum input current
IRING
15
mA
Junction temperature
Tj
125
°C
Ambient temperature
Tamb
–25 to +75
°C
Storage temperature
Tstg
–55 to +150
°C
Total power dissipation,
Tamb = 60°C
Ptot
0.9
W
14.2 Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient
SSO44
RthJA
70
K/W
14.3 Electrical Characteristics
f = 1 kHz, 0 dBm = 775 mVrms, IVMIC = 0.3 mA, IMP = 3 mA, RDC = 1.3 M, Tamb = 25°C, Zear = 68 nF + 100 ,
ZM = 68 nF, f = 3.58 MHz, all bits in reset condition, unless otherwise specified.
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Fig.
DC characteristics
DC voltage drop-over
circuit
IL = 2 mA
IL = 14 mA
IL = 60 mA
IL = 100 mA
VL
4.6
8.8
2.4
5.0
7.5
9.4
5.4
10.0
V
Transmission amplifier, IL = 14 mA, VMIC = 2 mVRMS, MICG[0:1] = 2, AGATX[0:2] = 7
ERX = ETX = ENMIC = ENSTBAL = I1O1 = I3O3 = 1, (GT = 48 dB)
Transmit amplification
MICG[0:1] = 2
AGATX[0:2] = 7
GT
46
47
48
dB
Frequency response
(see note 1)
IL ≥ 14 mA,
f = 3.4 kHz
DGT
–1
0
dB
Gain change with
current
IL = 14 to 100 mA
DGT
±0.5
dB
Gain deviation
Tamb = –10 to +60°C
DGT
±0.5
dB
CMRR of microphone
amplifier
CMRR
60
80
dB
Input resistance of
MIC amplifier
Ri
50
k
Input resistance of
MIC3 amplifier
MICHF = 1
Ri
75
150
300
k
Gain difference
between MIC1, MIC2
to MIC3
MICHF = 1
DGT
±0.4
dB
Distortion at line
IL ≥ 14 mA
VL = 700 mVrms
dt
2
%
Note 1)
Frequency response is due to internal filters
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