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| 型号： | 73M1903-IMR/F |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| 封装： | ROHS COMPLIANT, QFN-32 |
| 文件页数： | 18/47页 |
| 文件大小： | 541K |
| 代理商： | 73M1903-IMR/F |
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DS_1903_032
73M1903 Data Sheet
Rev. 2.1
25
6
Test Modes
There are two loop back test modes that affect the configuration of the analog front end. The internal
loop back mode connects the serial bit stream generated by the analog receiver to the input of the analog
transmitter. This loop back mode is similar to a remote analog loop back mode and can be used to
evaluate the operation of the analog circuits. When using this loop back mode, the TXAN/TXAP pins
should not be externally coupled to the RXAP/RXAN pins. Set bit 4 (INTLB) in register 1h (CTRL2) to
enter this loop back mode.
The second loop back test mode is the external loop back mode, or local analog loop back mode. In this
mode, the analog transmitter outputs are fed back into the input of the analog receiver. Set bit 5 (ANALB)
in register 1h (CTRL2) to enter this loop back mode. In this mode, TBS must be kept to below a value
that corresponds to less than 1.16 V/2.31 V x -6 dB = 25% of the full scale code of +/- 32768 at TXD in
order to ensure that the receiver is not overdriven beyond the maximum of 1.16 Vpkpk diff for Rxg=11(0
dB) setting. See Table 16 for the maximum allowed transmit levels. Check the transmitted data against
received data via serial interface. This tests the functionality of essentially all blocks, both digital and
analog, of the chip.
There is a third loopback mode that bypasses the analog circuits entirely. Digital loop back forces the
transmitter digital serial bit stream (from DSDM) to be routed into the digital receiver’s sinc
3 filters. Set bit
6 (DIGLB) in register 1h (CTRL2) to enter this loop back mode.
7
Power Saving Modes
The 73M1903 has only one power conservation mode. When the ENFE, bit 7 in register 0h, is zero the
clocks to the filters and the analog are turned off. The transmit pins output a nominal 80 k
impedance.
The clock to the serial port is running and the GPIO and other registers can be read or updated.
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| 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) |
| 73M1903-IVTR/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) |
| 73M1906B-IM/F | 功能描述:电信线路管理 IC DAA-FXO VOLP System Host Side 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 |
| 73M1906B-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 |
| 73M1906B-IMR/F | 功能描述:电信线路管理 IC DAA-FXO VOLP System Host Side 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 |
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