ADC - Low Power A/D Converters

Single-Ended Input ADCs with SPI Interface

Differential Input ADCs with SPI Interface

Single-Ended Input ADCs with I2C Interface

Single-Ended / Pseudo-Differential ADC with I2C Interface

Designing with National's PowerWise® A/D Converters (ADCs)

National's PowerWise Analog-to-Digital Converters (ADCs) are the lowest power family of A/D converters on the market. In addition to providing extremely low power consumption over a range of sample rates, each ADC has a very efficient power down feature. For example, a single channel 1Msps PowerWise ADC used in a 10 Ksps application has a typical power consumption of 0.02 mW at 3V.

National's PowerWise ADCs also lower engineering cost. A/D converters with the same channel count and package are interchangeable so one PCB layout supports multiple system designs that require different resolutions and sample rates.

And since National's PowerWise A/D converter performance is guaranteed over a range of sample rates instead of a single rate, unique in the industry, one ADC can be used in place of multiple conventional ADCs. This reduces design time, shortens time to market and lowers component stocking cost.

ADC121S101 used in 10 ksps application
Power consumption at 3V (active mode): 2.0 mW (typ)
Power consumption (power down): 2.5 µW (typ)
Average power consumption at 3V: 0.02mW (typ)

Selection by ADC Type:

• Single-Ended Input ADCs with SPI Interface
• Differential Input ADCs with SPI Interface
• Single-Ended Input ADCs with I2C Interface

Low Power ADC Family Naming Convention