KHN11112 Analog Front End IC

GENERAL DESCRIPTION

The KHN1112 is a highly integrated analog front-end IC (AFE) for the home networking applications such as HomePNA and broadband PLC (HD-PLC, HPAV, etc). Data rates up to 80MSPS are supported in both Rx and Tx path. SPI (serial peripheral I/F) allows software programmability of the AFE.

The functional block diagram of the KHN11112 is shown below. The Tx signal path consists of a x2 low-pass interpolation filter, SSB modulator, 12-bit 160MSPS DAC. The Rx signal path consists of a programmable amplifier (PGA), a 160MSPS ADC and a decimation filter to generate a 80MSPS digital output word. On-chip PLL multiplier and synthesizer provide all the required clock signals from a single crystal or clock source.

The 12-bit digital data interface runs maximum of 80MHz in half-duplex mode, and up to 108MHz in full duplex mode.

The KHN11121 is available in a 64 Quad Flat No-Lead package (VQFN), 9mmx9mm with 0.5mm pin pitch. It is specified over the industrial temperature range of -40°C to +85°C


Features

  • Home Networking Analog Front End IC covering broadband PLC (HD-PLC, HPAV, etc) and HomePNA 3.1
  • High speed sampling rate and low power consumption
  • Up to 80MSPS data rate
Tx path
  • 12bit 160MSPS DAC
  • x2 interpolation filter
  • Configurable SSB modulation
  • Maximum 10dBm current-source DAC with 0.5dB gain step
Rx path
  • 12bit 160MSPS ADC
  • Configurable SSB modulation
  • -18 dB to +42dB low-noise PGA
  • 14MHz - 52MHz configurable LPF cutoff frequency
  • Internal clock multiplier (PLL)
  • Integrated fine and accurate foreground calibration on Tx and Rx path
  • 64 Exposed Quad Flat No-Lead package (VQFN)
  • Industrial Temp range (-40 ~+85⁰C)
 

Block Diagram

Product Brochure