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XRD87L99

Exar Corporation
Part Number XRD87L99
Manufacturer Exar Corporation
Description A/D CONVERTER
Published Aug 25, 2007
Detailed Description www.DataSheet4U.com xr FEBRUARY 2001 XRD87L99 LOW POWER, 2 MSPS, 10-BIT, A/D CONVERTER WITH 8-CHANNEL MUX REV. 1.0.0 ...
Datasheet PDF File XRD87L99 PDF File

XRD87L99
XRD87L99

Overview
www.
DataSheet4U.
com xr FEBRUARY 2001 XRD87L99 LOW POWER, 2 MSPS, 10-BIT, A/D CONVERTER WITH 8-CHANNEL MUX REV.
1.
0.
0 FEATURES • 10-Bit Resolution • 8-Channel Mux • Sampling Rate - < 1kHz - 2MHz • Low Power CMOS - 24 mW (typ) • Power Down; Lower Consumption - 0.
1 mW (typ) • Input Range between GND and VDD • No S/H Required for Analog Signals less than 100kHz • 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 Communications • 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 100kHz.
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 encompass 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 compatible.
The XRD87L99 uses a two-step flash technique.
The first segment converts the 5 MSBs and consists of autobalanced comparators, latches, an encoder, and buf...


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