XRD87L99 Datasheet | Exar

FEATURES - 10-Bit Resolution - 8-Channel Mux - Sampling Rate - < 1k Hz - 2MHz - Low Power CMOS - 24 m W (typ) - Power Down; Lower Consumption - 0.1 m W (typ) - Input Range between GND and VDD - No S/H Required for Analog Signals less than 100k Hz - No S/H Required for CCD Signals less than 2MHz - Single Power Supply (2.7 to 3.6V) - Latch-Up Free - ESD Protection: 2000 Volts Minimum APPLICATIONS - µP/DSP Interface and Control Application - High Resolution Imaging - Scanners & Copiers - Wireless Digital munications - Multiplexed Data Acquisition BENEFITS - Reduced Board Space (Small Package) - Reduced External Parts, No Sample/Hold Needed - Suitable for Battery & Power Critical Applications - Designer can Adapt Input Range & Scaling GENERAL DESCRIPTION The XRD87L99 is a flexible, easy to use, precision 10-bit analog-to-digital converter with 8-channel mux that operates over a wide range of input and sampling conditions. The XRD87L99 can operate with pulsed "on demand" conversion operation or continuous "pipeline" operation for sampling rates up to 2MHz. The elimination of the S/H requirements, very low power, and small package size offer the designer a low cost solution. No sample and hold is required for CCD applications up to 2MHz, or multiplexed input applications when the signal source bandwidth is limited to 100k Hz. The input architecture of the XRD87L99 allows direct interface to any analog input range between AGND and AVDD. The user simply sets VREF(+) and VREF(-) to enpass the desired input range. Scaled reference resistor taps @ 1/4 R, 1/2 R and 3/4 R allow for customizing the transfer curve as well as providing a 1/2 span reference voltage. Digital outputs are CMOS and TTL patible. The XRD87L99 uses a two-step flash technique. The first segment converts the 5 MSBs and consists of autobalanced parators, latches, an encoder, and buffer storage registers. The second segment converts the remaining 5 LSBs. When the power down input is "high", the data outputs DB9...