- 您現在的位置：買賣IC網 > PDF目錄68812 > 73M1903C-IMR/F (MAXIM INTEGRATED PRODUCTS INC) SPECIALTY CONSUMER CIRCUIT, PQCC32 PDF資料下載
參數資料
| 型號： | 73M1903C-IMR/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| 封裝： | LEAD FREE, QFN-32 |
| 文件頁數： | 16/48頁 |
| 文件大小： | 487K |
| 代理商： | 73M1903C-IMR/F |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁
DS_1903C_033
73M1903C Data Sheet
Rev. 5.0
23
6.3
Modem Transmitter
The modem transmitter begins with a 48 tap Transmit Interpolation Filter (TIF) that takes in the 16-bit,
two’s compliment numbers (TXD) at SDIN pin at Fs=8 kHz rate. It up-samples (interpolates) the data to
16 kHz rate rejecting the images at multiples of 8 kHz 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 0.664 (–3.56 dB) 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
1.536 MHz. It possesses nulls at multiples of 384 kHz 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 8 and Figure 9 show the frequency response of the transmit path from TXD to TXAP/TXAN.
The transmit bandwidth is about 3.65 kHz when Fs=8 kHz. The bandwidth scales with Fs, the sampling
rate. In case of Fs=9.6 kHz , then the bandwidth is 3.65 kHz x 9.6/8 = 4.38 kHz and Fs=10.28 kHz, the
bandwidth is 3.65 kHz x 10.28/8 = 4.69 kHz. This is applicable for both transmit and receive path filters.
Figure 8: Overall TX Path Frequency Response at 8 kHz Sample Rate
相關PDF資料 |
PDF描述 |
|---|---|
| 73M1903C-IM | SPECIALTY CONSUMER CIRCUIT, QCC32 |
| 73M1903C-IM | SPECIALTY CONSUMER CIRCUIT, QCC32 |
| 73S1209F-44IM/F | POWER SUPPLY MANAGEMENT CKT, QCC44 |
| 73S1209F-68IM/F | POWER SUPPLY MANAGEMENT CKT, QCC68 |
| 73S1209F-68IMR/F | POWER SUPPLY MANAGEMENT CKT, QCC68 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 73M1903-EVM-600 | 功能描述:網絡開發工具 73M1903 w/Ppu & 600 Ohm Term-Usa & Japan RoHS:否 制造商:Rabbit Semiconductor 產品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數據速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
| 73M1903-EVM-ETSI | 功能描述:網絡開發工具 73M1903 w/Etsi 203 Complex Imped. Term RoHS:否 制造商:Rabbit Semiconductor 產品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數據速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
| 73M1903-EVM-WW | 功能描述:BOARD DEMO 73M1903 PPU WORLDWIDE RoHS:是 類別:編程器，開發系統 >> 評估演示板和套件 系列:- 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- 主要目的:電源管理，電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態 LED 已供物品:板 |
| 73M1903-IM/F | 功能描述:電信線路管理 IC Modem AFE V.22Bis-V.92 RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| 73M1903-IM/F1 | 功能描述:電信線路管理 IC RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
發布緊急采購，3分鐘左右您將得到回復。