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參數(shù)資料
| 型號： | TCM37C15ADW |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | PCM COMBO WITH PROGRAMMABLE GAIN CONTROL |
| 中文描述： | 的PCM組合，具有可編程增益控制 |
| 文件頁數(shù)： | 16/23頁 |
| 文件大?。?/td> | 351K |
| 代理商： | TCM37C15ADW |
TCM37C14A, TCM37C15A
PCMCOMBO WITH PROGRAMMABLE GAIN CONTROL
SLWS018B – JUNE 1996 – REVISED MAY 1998
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
miscellaneous functions (continued)
attenuation adjust
The attenuation of the transmit and receive amplifiers is set by external resistors connected to the device as
shown in Figure 7 and can be adjusted using internal switching elements as shown in Table 2.
_
+
PWRO+
RSIN
RS1
RS2
GSR
From Buffer
AGND
RSB
S0
S1
Receive Gain Control Circuitry
(Attenuation Configuration)
Transmit Gain Control Circuitry
(Attenuation Configuration)
RSA
RSF
RIN
_
+
GSX
TS1
TS2
AGND
RTB
S0
S1
RTA
RTF
ANLGIN
RTIN
Analog Input
Analog Output
Figure 7. Attenuation Control Circuitry
Table 2. Logic Table for Programmable Attenuation Control
CONTROL
TERMINALS
INTERNAL SWITCH POSITION
TRANSFER FUNCTION
(ATTENUATION)
GS0
GS1
RS1
RS2
TS1
TS2
RECEIVE
TRANSMIT
Low
Low
Power Down
Low
Hi
Open
Open
Open
Open
– RSF/RSIN
– RTF/RTIN
Hi
Low
Closed
Open
Closed
Open
– RSF || RSB/RSIN
– RTF || RTB/RTIN
Hi
Hi
Open
Closed
OPEN
Closed
– RSF || RSA/RSIN
– RTF || RTA/RTIN
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