FEATURES
12-Bit resolution Internal sample and hold 6 Microseconds acquisition time 9 Microseconds conversion time Programmable input ranges Parallel output PRODUCT OVERVIEW Five input voltage ranges are programmable by external pin connection; 0 to +5V, 0 to+10V, ±2.5V, ±5V, and ±10V. Input impedance to the sample-hold is 100 megohms. Output coding is complementary binary for unipolar operation and complimentary offset binary for bipolar operation. The ADC-HS12B uses a fast 12-bit monolithic DAC which includes a precision zener reference source. The circuit also contains a fast monolithic 12-bit successive approximation register, a clock and a monolithic sample-hold. SIMPLIFIED SCHEMATIC SAMPLE BIPOLAR REF CH CONTROL OFFSET OUT 17 32 23 18 ANALOG 30 IN SAMPLE HOLD 6.3K +15Vdc -15Vdc +5Vdc 28 31 16 PRECISION REFERENCE CIRCUIT S.H. OUT 29 COMPAR IN 22 10V RANGE 24 20V RANGE 25 ANALOG 26 COMMON COMPARATOR 5K 5K CLOCK 12-BIT D/A CONVERTER SUCCESSIVE APPROXIMATION REGISTER 27 GAIN ADJUST 15 DIGITAL COMMON SHORT 14 CYCLE 20 E.O.C.
Datel
