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參數(shù)資料
| 型號： | TP13057A |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | Codec |
| 英文描述： | Combination Codec/Filter(單片，串行接口，組合脈沖編碼譯碼器和濾波器，增強降噪) |
| 中文描述： | 組合編解碼器/濾波器（單片，串行接口，組合脈沖編碼譯碼器和濾波器，增強降噪） |
| 文件頁數(shù)： | 12/17頁 |
| 文件大?。?/td> | 361K |
| 代理商： | TP13057A |
TP3054A, TP3057A, TP13054A, TP13057A
MONOLITHIC SERIAL INTERFACE
COMBINED PCM CODEC AND FILTER
SCTS026C – SEPTEMBER 1992 – REVISED JULY 1996
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
system reliability and design considerations
TP305xA, TP1305xA system reliability and design considerations are described in the following paragraphs.
latch-up
Latch-up is possible in all CMOS devices. It is caused by the firing of a parasitic SCR that is present due to the
inherent nature of CMOS. When a latch-up occurs, the device draws excessive amounts of current and will
continue to draw heavy current until power is removed. Latch-up can result in permanent damage to the device
if supply current to the device is not limited.
Even though the TP305xA and TP1305xA are heavily protected against latch-up, it is still possible to cause
latch-up under certain conditions in which excess current is forced into or out of one or more terminals. Latch-up
can occur when the positive supply voltage drops momentarily below ground, when the negative supply voltage
rises momentarily above ground, or possibly if a signal is applied to a terminal after power has been applied
but before the ground is connected. This can happen if the device is hot-inserted into a card with the power
applied, or if the device is mounted on a card that has an edge connector and the card is hot-inserted into a
system with the power on.
To help ensure that latch-up does not occur, it is considered good design practice to connect a reverse-biased
Schottky diode (with a forward voltage drop of less than or equal to 0.4 V – 1N5711 or equivalent) between the
power supply and GND (see Figure 3). If it is possible that a TP305xA- or TP1305xA-equipped card that has
an edge connector could be hot-inserted into a powered-up system, it is also important to ensure that the ground
edge connector traces are longer than the power and signal traces so that the card ground is always the first
to make contact.
device power-up sequence
Latch-up can also occur if a signal source is connected without the device being properly grounded. A signal
applied to one terminal could then find a ground through another signal terminal on the device. To ensure proper
operation of the device and as a safeguard against this sort of latch-up, it is recommended that the following
power-up sequence always be used:
1.
Ensure that no signals are applied to the device before the power-up sequence is complete.
2.
Connect GND.
3.
Apply V
BB
(most negative voltage).
Apply V
CC
(most positive voltage).
Force a power down condition in the device.
4.
5.
6.
Connect clocks.
7.
Release the power down condition.
8.
Apply FS synchronization pulses.
9.
Apply the signal inputs.
When powering down the device, this procedure should be followed in the reverse order.
相關PDF資料 |
PDF描述 |
|---|---|
| TP3057A | Combination Codec/Filter(單片，串行接口，組合脈沖編碼譯碼器和濾波器,單端接收輸出，增強降噪) |
| TP13054A | Combination Codec/Filter(單片，串行接口，組合脈沖編碼譯碼器和濾波器) |
| TP13067AN | MONOLITHIC SERIAL INTERFACE COMBINED PCM CODEC AND FILTER |
| TP3067ADW | MONOLITHIC SERIAL INTERFACE COMBINED PCM CODEC AND FILTER |
| TP13067ADW | MONOLITHIC SERIAL INTERFACE COMBINED PCM CODEC AND FILTER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TP13057ADW | 功能描述:接口—CODEC Mono Serial Intfc PCM Codec/Filter RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| TP13057ADWR | 功能描述:接口—CODEC Mono Serial Intfc PCM Codec/Filter RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| TP13057AJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:A-Law CODEC |
| TP13057AN | 功能描述:接口—CODEC Mono Serial Intfc PCM Codec/Filter RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| TP13057B | 制造商:TI 制造商全稱:Texas Instruments 功能描述:MONOLITHIC SERIAL INTERFACE COMBINED PCM CODEC AND FILTER |
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