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参数资料
| 型号： | TP3057V/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 14/18页 |
| 文件大小： | 0K |
| 描述： | IC INTERFACE ENHANCED SER 20PLCC |
| 标准包装： | 40 |
| 类型： | PCM 编解码器/滤波器 |
| 数据接口： | 串行 |
| ADC / DAC 数量： | 1 / 2 |
| 三角积分调变： | 无 |
| 电压 - 电源，模拟： | ±5V |
| 电压 - 电源，数字： | ±5V |
| 工作温度： | -25°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-LCC（J 形引线） |
| 供应商设备封装： | 20-PLCC |
| 包装： | 管件 |
| 其它名称： | *TP3057V *TP3057V/NOPB TP3057V |
Functional Description (Continued)
TRANSMIT SECTION
The transmit section input is an operational amplifier with
provision for gain adjustment using two external resistors
see
Figure 4 The low noise and wide bandwidth allow gains
in excess of 20 dB across the audio passband to be real-
ized The op amp drives a unity-gain filter consisting of RC
active pre-filter followed by an eighth order switched-ca-
pacitor bandpass filter clocked at 256 kHz The output of
this filter directly drives the encoder sample-and-hold circuit
The AD is of companding type according to m-law
(TP3054) or A-law (TP3057) coding conventions A preci-
sion voltage reference is trimmed in manufacturing to pro-
vide an input overload (tMAX) of nominally 25V peak (see
table of Transmission Characteristics) The FSX frame sync
pulse controls the sampling of the filter output and then the
successive-approximation encoding cycle begins The 8-bit
code is then loaded into a buffer and shifted out through DX
at the next FSX pulse The total encoding delay will be ap-
proximately 165 ms (due to the transmit filter) plus 125 ms
(due to encoding delay) which totals 290 ms Any offset
voltage due to the filters or comparator is cancelled by sign
bit integration
RECEIVE SECTION
The receive section consists of an expanding DAC which
drives a fifth order switched-capacitor low pass filter
clocked at 256 kHz The decoder is A-law (TP3057) or
m
-law (TP3054) and the 5th order low pass filter corrects for
the sin xx attenuation due to the 8 kHz samplehold The
filter is then followed by a 2nd order RC active post-filter
power amplifer capable of driving a 600X load to a level of
72 dBm The receive section is unity-gain Upon the occur-
rence of FSR the data at the DR input is clocked in on the
falling edge of the next eight BCLKR (BCLKX) periods At
the end of the decoder time slot the decoding cycle begins
and 10 ms later the decoder DAC output is updated The
total decoder delay is E 10 ms (decoder update) plus
110 ms (filter delay) plus 625 ms(
frame) which gives
approximately 180 ms
4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TP3057V-X | 功能描述:IC INTERFACE ENHANCED SER 20PLCC RoHS:否 类别:集成电路 (IC) >> 接口 - 编解码器 系列:- 标准包装:2,500 系列:- 类型:立体声音频 数据接口:串行 分辨率（位）:18 b ADC / DAC 数量:2 / 2 三角积分调变:是 S/N 比，标准 ADC / DAC (db):81.5 / 88 动态范围，标准 ADC / DAC (db):82 / 87.5 电压 - 电源，模拟:2.6 V ~ 3.3 V 电压 - 电源，数字:1.7 V ~ 3.3 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-WFQFN 裸露焊盘 供应商设备封装:48-TQFN-EP（7x7） 包装:带卷 (TR) |
| TP3057WM | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
| TP3057WM/63SN | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
| TP3057WM/NOPB | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
| TP3057WMNOPB | 制造商:National Semiconductor 功能描述:Audio Codec 1ADC / 2DAC 16-Pin SOIC W Tube 制造商:National Semiconductor 功能描述:Audio Codec 1ADC / 2DAC 16-Pin SOIC Tube |
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