AD9761ARSZ

AD9761 is a complete dual-channel, high speed, 10bit CMOS DAC. The AD9761 has been developed specifically for use in wide bandwidth communication applications (e.g., spread spectrum) where digital I and Q information is being processed during transmit operations. It integrates two 10bit, 40MSPS DACs, dual 2X interpolation filters, a voltage reference, and digital input interface circuitry. The AD9761 supports a 20MSPS per channel input data rate that is then interpolated by 2X up to 40MSPS before simultaneously updating each DAC. The interleaved I and Q input data stream is presented to the digital interface circuitry, which consists of I and Q latches as well as some additional control logic. The data is de-interleaved back into its original I and Q data. An on-chip state machine ensures the proper pairing of I and Q data. The data output from each latch is then processed by a 2 digital interpolation filter that eases the reconstruction filter requirements.

• Complete 10bit, 40MSPS dual transmit DAC
• Excellent gain and offset matching
• Differential nonlinearity error is 0.5LSB
• Effective number of bits is 9.5bits (typ, TMIN to TMAX, AVDD = 5V, DVDD = 5V)
• Signal-to-noise and distortion ratio is 59dB (typ, fOUT = 1MHz, CLOCK = 40MSPS)
• Effective number of bits is 9.5bits (typ, TMIN to TMAX, AVDD = 5V)
• Spurious-free dynamic range is 68dB (typ, fOUT = 1MHz; CLOCK = 40MSPS, 10MHz Span)
• 2X interpolation filters, 20MSPS/channel data rate
• On-chip reference
• 28 lead SSOP package, junction temperature is 150°C (max)

บันทึก

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