ADAR7251WBCSZ

ADAR7251 is a 16bit, 4-channel, simultaneous sampling analogue-to-digital converter (ADC) designed especially for applications such as automotive LSR-FMCW or FSK-FMCW radar systems. Each of the four channels contains a low noise amplifier (LNA), a programmable gain amplifier (PGA), an equalizer, a multibit Σ-Δ ADC and a decimation filter. The front-end circuitry is designed to allow direct connection to an MMIC output with few external passive components. The ADAR7251 eliminates the need for a high order antialiasing filter, driver op amps and external bipolar supplies. The ADAR7251 also offers precise channel-to-channel drift matching. The ADAR7251 features an on-chip phase-locked loop(PLL) that allows a range of clock frequencies for flexibility in the system. Typical application includes automotive LSR systems and data acquisition systems.

• Low noise of 2.4nV/√Hz input referred voltage noise at maximum gain setting
• Wide input signal bandwidth of 500KHz at 1.2MSPS sample rate, 16bit resolution
• Additional sample rates supported are 300KSPS, 450KSPS, 600KSPS, 900KSPS and 1.8MSPS
• 4 differential simultaneous sampling channels and no active antialiasing filter required
• LNA and PGA with 45dB gain range in 6dB steps and selectable equalizer
• Flexible data port supports serial or parallel mode and supports FSK mode for FMCW radar systems
• On-chip 1.5V reference, internal oscillator/PLL input of 16MHz to 54MHz
• High speed serial data interface, SPI control and 2 general-purpose inputs/outputs
• Single supply operation of 3.3V
• 48 lead LFCSP package, operating temperature range from -40°C to 125°C

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ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party