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Acacia Semiconductor Introduces a Silicon Proven 14-bit 10MS/s ADC IP Dissipating only 14mW
CAPARICA, Portugal, January 23, 2006 — Acacia Semiconductor today announced it has proved in silicon a 14-bit ADC IP, code-named AS1410aT, targeting communications and consumer applications. The AS1410aT is a 14-bit ADC operating at 10MS/s over a single 1.8V supply and was implemented in a 0.18µm CMOS process. The ADC core requires no calibration or trimming and occupies a die area of only 1.22mm2. Auxiliary circuits comprising a low-noise bandgap reference and 4 voltage reference buffers are also included to provide a complete ADC solution. This ADC employs a high-performance front-end input sample-and-hold (S/H) circuit and a differential pipeline architecture with digital error correction. The S/H features a 2-bit programmable gain allowing a differential input range from 0.5Vpp to 1Vpp, an analog input bandwidth higher than 200MHz and can operate in under-sampling mode for communications applications. The 14-bit ADC features a DNL and an INL of ±0.7LSB and ±4.0LSB, respectively, measured for typical conditions. Dynamic performance highlights measured for a 1Vpp differential input signal with 1MHz frequency and 10MS/s sampling rate include an SNR of 65dB, SNDR of 64dB, THD of -73dB and SFDR of 75dB. The above performance results are achieved with the 14-bit ADC core dissipating less than 14mW over a 1.8V supply. “We are extremely pleased in having achieved outstanding performance simultaneously across key performance metrics, namely high linearity, ultra-low power, excellent dynamic performance and compact die size”, said Dr. Bruno Vaz, Team Leader for ADC Design at Acacia Semiconductor. “Typically, this type of ADC linearity performance is only obtained using well-controlled proprietary analog fabrication processes, trimming steps or complex calibrating circuitry”, he continued. “In our case, we have gone two steps further by minimizing power dissipation and designing this 14-bit ADC in a conventional pure-play foundry process, thereby demonstrating the quality of our design techniques and the effectiveness of our design methodology based on a proprietary analog design optimization and sizing engine”, concluded Dr. Vaz. The AS1410aT can be cost-effectively ported across foundries and process nodes upon request.
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