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參數(shù)資料
| 型號(hào)： | T7502 |
| 元件分類： | Codec |
| 英文描述： | T7502 Dual PCM Codec with Filters |
| 中文描述： | T7502雙PCM編解碼器與濾波器 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 417K |
| 代理商： | T7502 |
Data Sheet
February 1998
T7502 Dual PCM Codec with Filters
Features
I
+5 V only
I
Automatic powerdown mode
I
Low-power, latch-up-free CMOS technology
I
On-chip sample and hold, autozero, and precision
voltage reference
I
Differential architecture for high noise immunity
and power supply rejection
I
Automatic master clock frequency selection
I
2.048 MHz or 4.096 MHz fixed data rate
I
Frame sync controlled channel swapping
I
Differential analog I/O
I
300
output drivers
I
Operating temperature range: –40
°
C to +85
°
C
I
A-law companding
Applications
I
Speakerphone
I
Telephone answering device (TAD)
I
POTS for ISDN
Description
The T7502 device is a single-chip, two-channel
A-law PCM codec with filters. This integrated circuit
provides analog-to-digital and digital-to-analog
conversion. It provides the transmit and receive
filtering necessary to interface a voice telephone
circuit to a time-division multiplexed (TDM) system.
The device features a differential transmit amplifier,
and the power receive amplifier is capable of driving
600
differentially. PCM timing is defined by a single
frame sync pulse. This device operates in a delayed
timing mode (digital data is valid one clock cycle after
frame sync goes high). The T7502 is packaged in a
20-pin SOJ.
Figure 1. Block Diagram
5-3609.b
GS
X
0
VF
X
IN0
VF
R
OP0
GS
X
1
VF
X
IN1
VF
X
IP1
VCM1
VF
R
OP1
VF
R
ON1
–
+
FILTER
NETWORK
ENCODER
CHANNEL 0
+2.4 V
DECODER
PCM
INTERFACE
POWERDOWN
CONTROL
INTERNAL TIMING
& CONTROL
BIAS
CIRCUITRY
&
REFERENCE
CHANNEL 1
FILTER
NETWORK
D
X
D
R
GNDD
MCLK
V
DD
(1)
VF
X
IP0
VCM0
VF
R
ON0
FS
GNDA (2)
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| T7570 | T7570 Programmable PCM Codec with Hybrid-Balance Filter |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T75-02A | 制造商:The Cherry Corporation 功能描述: |
| T75-02A-2 | 制造商:The Cherry Corporation 功能描述: |
| T7503 | 制造商:AGERE 制造商全稱:AGERE 功能描述:T7503 Dual PCM Codec with Filters |
| T75-03A | 制造商:The Cherry Corporation 功能描述: |
| T7504 | 制造商:AGERE 制造商全稱:AGERE 功能描述:T7504 and T75504 Quad PCM Codecs with Filters |
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