Low power A to D converters

National Semiconductor has introduced five new 10- and 12-bit converters that, it claims, feature the industry’s lowest power consumption.

The ADC10080, ADC10065 and ADC10040 10-bit products consume only 78mW at 80 MSPS, 68mW at 65 MSPS, and 55mW at 40 MSPS, respectively. They feature a precision 1.2V internal reference, eliminating the need for an external reference, while the differential inputs on the devices provide a full-scale selectable input swing of 2Vpp, 1.5Vpp or 1Vpp. They also have a 400MHz – 3dB bandwidth, enabling their use in high-IF applications such as communications receivers. All three products are pin-compatible.

The ADC12020 and ADC12010 parts, on the other hand, are pin-compatible with National’s existing 12-bit ADCs – the ADC12040, ADC12L063 and ADC12L066 – providing a straightforward migration path for designers. The 5V ADCs consume only185 mW at 20 MSPS and 160 mW at 10 MSPS, respectively.

National’s ADC10080 is available in 28-lead TSSOP packaging and is priced at $8.77. The ADC10065 is available in 28-lead TSSOP packaging and is priced at $6.56. The ADC10040 is available in 28-lead TSSOP packaging and is priced at $5.42. The ADC12010 is available in 32-lead LQFP packaging and is priced at $5.85. The ADC12020 is available in LQFP packaging and is priced at $8.57. All prices are in 1,000-unit quantities.