AD7866

The AD7866 is a dual 12-bit high-speed, low power, successive- approximation ADC. The part operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 1 MSPS. The device contains two ADCs, each preceded by a low-noise, wide bandwidth track/hold amplifier which can handle input frequencies in excess of 10 MHz.

The conversion process and data acquisition are controlled using standard control inputs allowing easy interfacing to micro processors or DSPs. The input signal is sampled on the falling edge of  CS and conversion is also initiated at this point. The conversion time is determined by the SCLK frequency. There are no  pipelined delays associated with the part.

The AD7866 uses advanced design techniques to achieve very low power dissipation at high throughput rates. With 3 V supplies and 1 MSPS throughput rate, the part consumes a  maximum of 3.8 mA. With 5 V supplies and 1 MSPS, the current  consumption is a maximum of 4.8 mA. The part also offers flexible power/ throughput rate management when operating in sleep mode. The analog input range for the part can be selected to be a 0 Vto V_REF  range or a 2 * VREF range with eitherstraight binary ortwo's complement output coding. The AD7866 has anon-chip 2.5 V reference which can be overdriven if an externalreference is preferred. Each on-board ADC can also be supplied with a separate individual external reference. The AD7866 is available in a 20-lead thin shrink small outline (TSSOP) package.