SPT7936

SPT7936 12-BIT, 28 MSPS SAMPLING A/D CONVERTER FEATURES 3.0-3.6 V Power Supply Typical SINAD: 60 dB for (fIN = 10 MHz) Low power: (260 mW @3.3 V) Sample Rate: 28 MSPS Internal Sample/Hold Differential Input Sleep Mode (Power Down) APPLICATIONS Imaging Test Equipment Computer Scanners Communications Set-Top Boxes GENERAL DESCRIPTION The SPT7936 is a compact, high-speed, low power 12-bit monolithic analog-to-digital converter, implemented in a 0.5 µm CMOS process. The converter includes sample and hold. The full scale range can be set between ±0.6 V and ±1.2 V using external references. It operates from a single 3.0-3.6 V supply-compatible with modern digital systems. Most converters in this performance range demand at least a +5 V supply. Its low distortion and high dynamic range offers the performance needed for demanding imaging, multimedia, telecommunications and instrumentation applications. The SPT7936 has a pipelined architecture - resulting in low input capacitance. Digital error correction of the 11 most significant bits ensures good linearity for input frequencies approaching Nyquist. The device is available in a 44L TQFP package over the commercial temperature range of 0 to +70 °C. BLOCK DIAGRAM BGAP Bias 0 Bias 1 CM Ref Buff Ref Buff BGREF BIAS CELL Ext Ref VREF+ VREFVIN+ VIN- THA Stage 1 Stage 2 Stage 3 Stage 10 Stage_Last (2-Bit Flash) Clock Clock Driver Digital Delays, Error Correction and Output Register OR Bit <11...0)...