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參數(shù)資料
| 型號： | IDT821024PPG |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 10/13頁 |
| 文件大小： | 0K |
| 描述： | IC PCM CODEC QUAD NONPROG 44TQFP |
| 標準包裝： | 80 |
| 類型： | PCM 編解碼器/濾波器 |
| 數(shù)據(jù)接口： | PCM 音頻接口 |
| ADC / DAC 數(shù)量： | 4 / 4 |
| 三角積分調變： | 無 |
| 電壓 - 電源，模擬： | 4.75 V ~ 5.25 V |
| 電壓 - 電源，數(shù)字： | 4.75 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-LQFP |
| 供應商設備封裝： | 44-TQFP |
| 包裝： | 托盤 |
| 其它名稱： | 800-2624 821024PPG IDT821024PPG-ND |
6
INDUSTRIAL TEMPERATURE RANGE
IDT821024 QUAD NON-PROGRAMMABLE PCM CODEC
OPERATING THE IDT821024
The following descriptions about operation applies to all four channels of
the IDT821024.
Power-on Sequence and Master Clock Configuration
To power on the IDT821024 users should follow this sequence:
1. Apply ground;
2. Apply VCC, finish signal connections;
3. Set PDN1-4 pins high, thus all of the 4 channels are powered down;
The master clock (MCLK) frequency of IDT821024 can be configured as
2.048 MHz, 4.096 MHz or 8.192 MHz. Using the Transmit Frame Sync
(FSX) inputs, the device determines the MCLK frequency and makes the
necessary internal adjustments automatically. The MCLK frequency must
be an integer multiple of the Frame Sync frequency.
OperatingModes
There are two operating modes for each transmit or receive channel:
standby mode (when the channel is powered down) and normal mode (when
the channel is powered on). The mode selection of each channel is done
by its corresponding PDN pin. When PDNn is 1, Channel N is in standby
mode; when PDNn is 0, Channel N is in normal mode.
In standby mode, all circuits are powered down with the analog outputs
placed in high impedance state.
In normal mode, each channel of the IDT821024 is able to transmit and
receive both PCM and analog information. The normal mode is used when
a telephone call is in progress.
Companding Law Selection
An A/
pin is provided by IDT821024 for the companding law selection.
When this pin is low,
-law is selected; when the pin is high, A-law is
selected.
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| IDT821034 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:QUAD PCM CODEC WITH PROGRAMMABLE GAIN |
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