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| 型號(hào)： | 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(yè)數(shù)： | 21/34頁(yè) |
| 文件大小： | 762K |
| 代理商： | U3900BM |
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U3900BM
Rev. A2, 25-Aug-98
Target Specification
28 (34)
Electrical Characteristics (continued)
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Fig.
Receiving noise
psophometrically
weighted
IL = 14 mA
Zear = 68 nF + 100
EA[0:4] = 21
– 80
– 77
dBmp
Sidetone suppression
Z = 600
20
dB
Output resistance
Each output against GND
Ro
10
W
Gain at low operating
current (receive only)
IL = 5 mA, IMP = 1 mA
IM = 300
mA
VGEN = 200 mV
RDC = 680 k,
EA[0:4] = 21,
ENMIC = ETX = I101 = 0
GR
–2
0
2
dB
AC impedance
IMPH = 0
IMPH = 1
Zimp
570
950
600
1000
640
1050
W
Distortion at low
operating current
IL = 8 mA, IMP = 1 mA
VGEN = 400 mV
RDC = 680 k
EA[0:4] = 21
dR
5
%
Adjustment step:
ear-piece amplifier
AGARX[0:4] = 1
0.8
1
1.2
dB
Adjustment step:
AGARX
EA[0:4] = 1
0.8
1
1.2
dB
Gain for DTMF signal
AMPB
→ RECO1/2
EA[0:4] = 1
–16
dB
DTMF, IL = 14 mA, ETX = I201 = 1, AGATX[0:2] = 7, DTMFM[0:2] = 4, DTMFF[0:2] = 0
Max. level at line
Sum level, 600
W,
DTMFM[0:2] = 5
–5.1
–3.6
–2.1
dBm
DTMF level at line
(low gain)
Sum level, 600
W,
DTMFM[0:2] = 4
–7.6
–6.1
–4.6
dBm
Preemphasis
600
W, DTMFF4 = 0
DTMFF4 = 1
2
3
2.5
3.5
3
4
dBm
Speaker amplifier, differential mode
AMPB
→ SAO1/2
ENSACL = ENSA = ENSAO = ENAM = I5O2 = 1, SA[0:4] = 0
Minimum line current
for operation
No AC signal
ILmin
8
mA
Gain from AMPB to
SAO
VAMPB = 3 mV, IL = 15 mA,
SA[0:4] = 31
SA[0:4] = 0
GSA
37
38
–8.5
39
dB
Adjustment step
speaker amplifier
DSA[0:4] = –1
1.3
1.5
1.7
dB
Output power
single ended
Load resistance:
RL = 50 , d < 5%
VAMPB = 20 mV, SE = 1
IL = 15 mA
IL = 20 mA
PSA
3
7
20
mW
Max. output power
differential
Load resistance:
RL = 50 , d < 5%
VAMPB = 20 mV, SE = 0
VB = 5 V
PSA
200
mW
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