GENERAL DESCRIPTION
The AD9221, AD9223, and AD9220 are a generation of high performance, single supply 12-bit analog-to-digital converters. Each device exhibits true 12-bit linearity and temperature drift performance1 as well as 11.5-bit or better ac performance.2 The AD9221/AD9223/AD9220 share the same interface options, package, and pinout. Thus, the product family provides an upward or downward component selection path based on performance, sample rate and power. The devices differ with respect to their specified sampling rate, and power consumption, which is reflected in their dynamic performance over frequency.
The AD9221/AD9223/AD9220 combine a low cost, high speed CMOS process and a novel architecture to achieve the resolution and speed of existing hybrid and monolithic implementations at a fraction of the power consumption and cost. Each device is a complete, monolithic ADC with an on-chip, high performance, low noise sample-and-hold amplifier and programmable voltage reference. An external reference can also be chosen to suit the dc accuracy and temperature drift requirements of the application. The devices use a multistage differential pipelined architecture with digital output error correction logic to provide 12-bit accuracy at the specified data rates and to guarantee no missing codes over the full operating temperature range.

FEATURES
   Monolithic 12-Bit A/D Converter Product Family
   Family Members Are: AD9221, AD9223, and AD9220
   Flexible Sampling Rates: 1.5 MSPS, 3.0 MSPS, and
      10.0 MSPS
   Low Power Dissipation: 59 mW, 100 mW, and 250 mW
   Single 5 V Supply
   Integral Nonlinearity Error: 0.5 LSB
   Differential Nonlinearity Error: 0.3 LSB
   Input Referred Noise: 0.09 LSB
   Complete On-Chip Sample-and-Hold Amplifier and
      Voltage Reference
   Signal-to-Noise and Distortion Ratio: 70 dB
   Spurious-Free Dynamic Range: 86 dB
   Out-of-Range Indicator
   Straight Binary Output Data
   28-Lead SOIC and 28-Lead SSOP