FEATURES
SELF-CALIBRATING
HIGH SFDR: 85dB at NYQUIST
HIGH SNR: 76dB
LOW POWER: 250mW
DIFFERENTIAL OR SINGLE-ENDED INPUTS
+3V/+5V LOGIC I/O COMPATIBLE
FLEXIBLE INPUT RANGE
OVER-RANGE INDICATOR
INTERNAL OR EXTERNAL REFERENCE

APPLICATIONS
IF AND BASEBAND DIGITIZATION
CCD IMAGING SCANNERS
TEST INSTRUMENTATION
IR IMAGING

DESCRIPTION
The ADS850 is a high dynamic range, 14-bit Analog-to-Digital
Converter (ADC) that utilizes a fully differential input, allowing for
either single-ended or differential input interface over varying
input spans. This converter features digital error correction techniques
ensuring 14-bit linearity and a calibration procedure that
corrects for capacitor and gain mismatches. The ADS850 also
includes a high-bandwidth track-and-hold that provides excellent
spurious performance up to and beyond the Nyquist rate.
The ADS850 provides an internal reference that can be programmed
for a 2Vp-p input range for the best spurious performance
and ease of driving. Alternatively, the 4Vp-p input range
can be used for the lowest input referred noise, offering
superior signal-to-noise performance for imaging applications.
There is also the capability to set the range between 2Vp-p and
4Vp-p, or to use an external reference. The ADS850 also
provides an over-range indicator flag to indicate if the input has
exceeded the full-scale input range of the converter.
The low distortion and high signal-to-noise performance provide
the extra margin needed for communications, imaging,
and test instrumentation applications. The ADS850 is available
in a TQFP-48 package.