AD9975: Integrated Single Supply Broadband Modem Mixed Signal Front End
AD9975 简述
The AD9975 is an integrated single supply broadband modem mixed signal front end (MxFE) IC similar to the AD9875. Like the AD9875, this device contains a transmit path Interpolation Filter, and DAC along with a receive path that includes a PGA, LPF and ADC as required for a variety of broadband modem applications. Also on-chip is a PLL clock multiplier, which provides all required clocks from a single crystal or clock input.
Where the AD9975 and AD9875 differ is in the digital interface. The AD9975 has a digital interface that uses a single 10-bit data bus that is shared between the Tx and Rx paths. The AD9875 also includes a 10-bit data bus, but uses 5-bit interleaved nibbles for both the Tx and Rx paths, providing full duplex operation.
The AD9975 digital transmit and receive ports have individual TX/RX clocks and TX/RX enable lines. This interface connects directly to Homelug 1.0 PHY/MAC chips including the INT5130 from Intellon and CX11647 from Conexant. The AD9975 is available in a space-saving 48-lead LQFP package and is specified over the commercial (-40ºC to +85ºC) temperature range.
.AD9975 特点
- Low Cost 3.3 V-CMOS Mixed Signal Front End Converter for Broadband Modems
- Compatile with the INT5130 and Conexant CX11647 HomePlug processor ICs
- 10-Bit D/A Converter (TxDAC+®)
- 50 MSPS Input Word Rate
- 2x Interpolating Low Pass Transmit Filter
- 100 MSPS DAC Output Update Rate
- Wide (21 MHz) Transmit Bandwidth
- Power Down Modes
- 10-Bit, 50 MSPS A/D Converter
- 4th Order LPF w/ Selectable Cutoff Frequency
- Dual Mode Programmable Gain Amplifier
- Internal Clock Multiplier (PLL)
AD9975 功能框图
AD9975 技术指标
| Resolution (Bits) | 10bit | Interface | Par |
| T-Put Rate | 50MSPS | Ain Range | - |
| # Chan | 2 | SNR (dB) | - |
| Supply V | Single(+3.3) | Pkg Type | - |
| Pwr Diss (max) | - | -- | -- |
AD9975 芯片订购指南
| 产品型号 | 产品状态 | 封装 | Pins | 温度范围 | ROHS Compilant |
|---|---|---|---|---|---|
| AD9975BST | 上次购货时间 | 48 ld LQFP | 48 | Ind | N Material Declaration |
| AD9975BSTRL | 上次购货时间 | 48 ld LQFP | 48 | Ind | N Material Declaration |
| AD9975BSTZ | 上次购货时间 | LQFP 1.4 MM | 48 | Ind | Y Material Declaration |
- 民用温度范围：0 ºC～＋70 ºC
- 军用温度范围：－55ºC ～＋125ºC
- 工业用温度范围：不同型号的产品的温度范围可能不同。
- 汽车工作温度范围：-40 ℃～ +125 ℃
