- 您现在的位置：买卖IC网 > PDF目录68812 > 73M1903-IGV (TERIDIAN SEMICONDUCTOR CORP) SPECIALTY CONSUMER CIRCUIT, PQFP32 PDF资料下载
参数资料
| 型号： | 73M1903-IGV |
| 厂商： | TERIDIAN SEMICONDUCTOR CORP |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP32 |
| 封装： | TQFP-32 |
| 文件页数： | 15/45页 |
| 文件大小： | 449K |
| 代理商： | 73M1903-IGV |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页当前第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页
73M1903
Modem Analog Front End
DATA SHEET
ge: 22 of 45
2005 TERIDIAN Semiconductor Corporation
Rev 1.4
MODEM TRANSMITTER
The modem transmitter begins with an 48 tap Transmit Interpolation Filter (TIF) that takes in the 16-bit,
two’s compliment numbers (TXD) at SDIN pin at Fs=8kHz rate. It up-samples (interpolates) the data to
16kHz rate rejecting the images at multiples of 8kHz that exist in the original TXD data stream and
outputs 16-bit, two’s compliment numbers to a digital sigma-delta modulator.
The gain of the
interpolation filter is 0.640625 (–3.8679dB) at dc.
The digital sigma-delta modulator (DSDM) takes 16-bit, two’s compliment numbers as input and
generates a 1’s bit stream which feeds into a D to A converter (DAC1). The gain through DSDM is 1.0.
DSDM takes 16-bit, two’s compliment numbers as input and generates a 1’s bit stream that feeds into a D
to A converter (DAC1).
DAC1 consists of a 5-tap FIR filter and a first order switched capacitor low pass filter both operating at
1.536MHz. It possesses nulls at multiples of 384kHz to allow decimation by the succeeding filter.
DAC1’s differential output is fed to a 3rd-order switched-capacitor low pass filter (TLPF). The output of
TLPF drives a continuous time smoothing filter. The sampling nature of the transmitter leads to an
additional filter response that affects the in-band signals. The response is in the form of sin(x)/x and can
be expressed as 20*log [(sin(PI*f/fs))/(PI*f/fs)] where f = signal frequency and fs = sample frequency = 16
kHz. Figure 10 shows the frequency response of the transmit path from TXD to TXAP/TXAN for a dc to
4kHz in-band signal including the effect of this sampling process plus those of DAC1, TLPF and SMFLT.
It is important to note that as TXD is sampled at 8kHz, it be band-limited to 4kHz.
Figure 10 -Frequency Response of TX Path for DC to 4kHz in band Signal
相关PDF资料 |
PDF描述 |
|---|---|
| 73M1903-IM | SPECIALTY CONSUMER CIRCUIT, QCC32 |
| 73M1903-IGV/F | SPECIALTY CONSUMER CIRCUIT, PQFP32 |
| 73M1903-IGV | SPECIALTY CONSUMER CIRCUIT, PQFP32 |
| 73M1903-IM | SPECIALTY CONSUMER CIRCUIT, QCC32 |
| 73M1903-IM/F | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 73M1903-IM/F | 功能描述:电信线路管理 IC Modem AFE V.22Bis-V.92 RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M1903-IM/F1 | 功能描述:电信线路管理 IC RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M1903-IMR/F | 功能描述:电信线路管理 IC Modem AFE V.22Bis-V.92 RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M1903-IMR/F1 | 功能描述:电信线路管理 IC RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
| 73M1903-IVT/F | 功能描述:IC MODEM AFE V.22BIS 20-TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模拟前端 (AFE) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:- 通道数:2 功率（瓦特）:- 电压 - 电源，模拟:3 V ~ 3.6 V 电压 - 电源，数字:3 V ~ 3.6 V 封装/外壳:32-VFQFN 裸露焊盘 供应商设备封装:32-QFN（5x5） 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。