- 您现在的位置：买卖IC网 > PDF目录10739 > 73M1903C-IM/F (Maxim Integrated Products)IC MODEM AFE MULTIREGIONAL 32QFN PDF资料下载
参数资料
| 型号： | 73M1903C-IM/F |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/48页 |
| 文件大小： | 0K |
| 描述： | IC MODEM AFE MULTIREGIONAL 32QFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 490 |
| 通道数： | 2 |
| 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： | 管件 |
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页第15页第16页当前第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页第46页第47页第48页
73M1903C Data Sheet
DS_1903C_033
24
Rev. 5.0
Figure 9: Frequency Response of TX Path for DC to 4 kHz in Band Signal at 8 kHz Sample Rate
6.4
Transmit Levels
The 16-bit transmit code word written by the DSP to the Digital Sigma-Delta Modulator (DSDM) (via TIF)
has a linear relationship with the analog output signal. So, decreasing a code word by a factor of 0.5 will
result in a 0.5 (-6dB) gain change in the analog output signal.
The following formula describes the relationship between the transmit code word and the output level at
the transmit pins (TXAP/TXAN):
Vout (V) = 2 * code/32,767 * DSDMgain * dacGAIN * VREF * TLPFgain * SMFLTgain * FreqFctr
Vout is the differential peak voltage at the TXAP and TXAN pins.
Code is the 16-bit, two’s compliment transmit code word written out by the DSP to the DSDM (via TIF).
The code word falls within a range of
± 32,767. For a sinusoidal waveform, the peak code word is used in
the formula to obtain the peak output voltage.
DSDMgain is the scaling factor used on the transmit code word to reduce the possibility of saturating the
modulator. This value is set to 0.640625(–3.555821dB) at dc in the 48 tap transmit interpolation filter
(TIF) that precedes DSDM.
dacGAIN is the gain of the DAC. The value dacGAIN is calculated based on capacitor values inside
DAC1 and dacGAIN=8/9=0.8889. The number 32,767 refers to the code word that generates an 82% 1’s
pulse density at the output of the DSDM. As can be seen from the formula, the D to A conversion is
dependent on the level of VREF. Also when DTMFBST bit is set, VREF is increased from 1.36 V to
1.586 V to allow higher transmit level or 16.6% increase in gain. This bit is intended for enhancing the
DTMF transmit level and should not be used in data mode.
TLPFgain is the gain of TLPF and nominally equals to 0.00 dB or 1.0.
SMFLTgain is the gain of SMFLT and nominally equal to 1.445 or 3.2 dB.
When TXBST0 bit is set, the gain is further increased by 1.65 dB (1.21) for the total of 4.85 dB. This is to
accommodate greater hybrid insertion loss encountered in some applications.
FreqFctr shows dependency of the entire transmit path on frequency. See Figure 8.
相关PDF资料 |
PDF描述 |
|---|---|
| VI-23N-IW | CONVERTER MOD DC/DC 18.5V 100W |
| VI-23N-CV-B1 | CONVERTER MOD DC/DC 18.5V 150W |
| 73M1903-IVT/F | IC MODEM AFE V.22BIS 20-TSSOP |
| VI-23M-IW | CONVERTER MOD DC/DC 10V 100W |
| MAX5863ETM+ | IC AFE 8/10BIT 7.5MSPS 48-TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 73M1903C-IMR/F | 功能描述:电信线路管理 IC Modem Analog Front End 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 |
| 73M1903C-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-EVM-600 | 功能描述:网络开发工具 73M1903 w/Ppu & 600 Ohm Term-Usa & Japan RoHS:否 制造商:Rabbit Semiconductor 产品:Development Kits 类型:Ethernet to Wi-Fi Bridges 工具用于评估:RCM6600W 数据速率:20 Mbps, 40 Mbps 接口类型:802.11 b/g, Ethernet 工作电源电压:3.3 V |
| 73M1903-EVM-ETSI | 功能描述:网络开发工具 73M1903 w/Etsi 203 Complex Imped. Term RoHS:否 制造商:Rabbit Semiconductor 产品:Development Kits 类型:Ethernet to Wi-Fi Bridges 工具用于评估:RCM6600W 数据速率:20 Mbps, 40 Mbps 接口类型:802.11 b/g, Ethernet 工作电源电压:3.3 V |
| 73M1903-EVM-WW | 功能描述:BOARD DEMO 73M1903 PPU WORLDWIDE RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板 |
发布紧急采购，3分钟左右您将得到回复。