AD9281ARSZ

AD9281 is a complete dual channel, 28MSPS, 8bit CMOS ADC. The AD9281 is optimized specifically for applications where close matching between two ADCs is required (e.g.,I/Q channels in communications applications). The 28MHz sampling rate and wide input bandwidth will cover both narrow- band and spread-spectrum channels. The AD9281 integrates two 8bit, 28MSPS ADCs, two input buffer amplifiers, an internal voltage reference and multiplexed digital output buffers. Each ADC incorporates a simultaneous sampling sample-and- hold amplifier at its input. The analogue inputs are buffered; no external input buffer op-amp will be required in most applications. The ADCs are implemented using a multistage pipeline architecture that offers accurate performance and guarantees no missing codes. The outputs of the ADCs are ported to a multiplexed digital output buffer.

• Complete dual matching ADC
• Low power dissipation: 225mW (+3V supply)
• Single supply: 2.7V to 5.5V
• DNL: ±0.1LSB, INL:±0.25LSB, 225mW power consumption, 16mW power down
• On-chip analogue input buffers
• On-chip reference, over seven effective bits, no missing codes guaranteed
• SNR: 49.2dB at f = 3.58MHz, THD: -67.5dB at f = 3.58 MHz
• Spurious-free dynamic range: 65dB at f = 3.58MHz and SINAD: 49.1dB at f = 3.58MHz
• 28 lead SSOP package
• Operating temperature range from -40 to 85°C

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