參數(shù)資料
型號: T7570
元件分類: Codec
英文描述: T7570 Programmable PCM Codec with Hybrid-Balance Filter
中文描述: T7570可編程PCM編解碼器與混合平衡濾波器
文件頁數(shù): 18/28頁
文件大?。?/td> 567K
代理商: T7570
18
Lucent Technologies Inc.
T7570 Programmable PCM Codec
with Hybrid-Balance Filter
Data Sheet
October 1996
Transmission Characteristics
(continued)
Table 16. Noise
* PPSR
X
is measured with a –50 dBm0 activation signal applied to VF
X
I.
Parameter
Symbol
N
XC
Test Conditions
Min Typ
Max
15
Unit
dBrnC0
Transmit Noise, C Message
Weighted,
μ
-law Selected
Transmit Noise, P Message
Weighted, A-law Selected
Receive Noise, C Message
Weighted,
μ
-law Selected
Receive Noise, P Message
Weighted, A-law Selected
Noise, Single Frequency
All 1s in gain register
N
XP
All 1s in gain register
–67
dBm0p
N
RC
PCM code is alternating positive and
negative zeros
PCM code equals positive one LSB
13
dBrnC0
N
RP
–79
dBm0p
N
RS
f = 0 kHz—100 kHz, analog to analog
measurement (D
X
0 is externally con-
nected to D
R
0), VF
X
I = 0 Vrms
V
DD
= 5.0 Vdc
+ 100 mVrms:
f = 0 kHz—4 kHz*
f = 4 kHz—50 kHz
PPSR
R
PCM code equals positive one LSB,
V
DD
= 5.0 + 100 mVrms,
measured VF
R
O:
f = 0 Hz—4000 Hz
f = 4 kHz—25 kHz
f = 25 kHz—50 kHz
SOS
0 dBm0, 300 Hz—3400 Hz input
PCM code applied at D
R
0 (or D
R
1):
4600 Hz—7600 Hz
7600 Hz—8400 Hz
8400 Hz—50,000 Hz
–53
dBm0
Power Supply Rejection, Transmit
PPSR
X
36
30
dBC
dBC
Power Supply Rejection, Receive
36
40
36
dBC
dB
dB
Spurious Out-of-Band Signals at
the Channel Output
–30
–40
–30
dB
dB
dB
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