FEATURES Guaranteed Nonlinearity: :to.003% FSR max 35J.lS Maximum Conversion Time Small Size 2" X 2" X0.4" Wide Power Supply Operation: :t12V to :t17V Low Cost $149 (100s) APPLICATIONS Process Control Data Acquisition Seismic Data Acquisition Nuclear Instrumentation Medical Instrumentation Pulse Code Modulation Telemetry Industrial Scales Robotics GENERAL DESCRIPTION The ADC1140 is a low cost 16-bit successive-approximation analog-to-digital converter having a 3SJJ.s maximum conversion time. This converter provides high accuracy, high stability and low power consumption all in a 2" X 2" X 0.4' module. High accuracy performance such as integral and differential nonlinearity of :to.OO3% FSR max are both guaranteed. Guaranteed stability such as differential nonlinearity TC of :!:2ppm/ °c maximum, offset TC of :!:30JJ.V/C maximum, gain TC of :!:12ppm/C maximum and power supply sensitivity of :!:O.002%of FSR/% Vs are also provided by the ADC1140. The ADC1140 makes extensive use of both integrated circuit and thin-film components to obtain excellent performance, small size and low cost. The internal 16-bit DAC incorporates Analog Devices' proprietary thin-film resistor technology and proprietary CMOS current-steering switches. A low noise reference, low power comparator and low power successive-approximation register are also used to optimize the ADC1140's design (shown in Figure 1). The ADC1140 can operate with power supplies ranging from :!:12V to :!:17V and has provisions for a user supplied external reference. Four analog input voltage ranges are selectable via pin programming: :!:5V, :t10V, 0 to +5V and 0 to +10V. Bipolar coding is provided in the offset binary and two's complement formats with unipolar coding displayed in true binary.