NJU9252P

NJU9252P 2-DIGIT SINGLE CHIP A/D CONVERTER QGENERAL DESCRIPTION The NJU9252P is a low operating current, high performance 2-digit single chip A/D converter containing a sample/hold circuit, an oscillator, a 7-segment decoder, LED display driver and a control circuit. The LED display changes by the high-speed sampling rate of 4 times/s (typ). The NJU9252P realizes to apply with few external components, therefore it is most suited for digital meters, digital thermometers and the others. QPACKAGE OUTLINE NJU9252PM QFEATURES O8bit Resolution, Successive Approximation Method OLow Input Current ( 1µA typ ) ODynamic LED direct drive OSampling-rate ( 4 times/s typ ) OSample/Hold Circuit On-Die OCR Oscillation Circuit On-Die OPower-on Initialization OOffset Adjustment Terminal OLow operating current OApplicable with Few External Components OC-MOS technology OPackage DMP20 QPAD LOCATION DMP20 SEG D SEG C SEG B SEG A SEG F SEG G SEG E NC COM1 VSS 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VDD VREF INH INL INR OFFSET 2 OFFSET 1 NC TEST COM2 QBLOCK DIAGRAM NJU9252P INH INL INR OFFSET 1 OFFSET 2 VREF VDD VSS DIF AMP SAMPLE & HOLD COMP BIN SEGMENT BCD DECODER LATCH POW ER ON RESET DAC SHIFT REGISTER DIV LAT MULTI PLEXER OSC CLOCK COMMON DRIVER SEGMENT DRIVER TEST COM 1 2 (Nch OPEN DRAIN) SEG A B C D E F G (Pch OPEN DRAIN) QTERMINAL DESCRIPTION SYMBOL FUNCTION SEG D LED Segment Driver D output ( Pch open-drain ) SEG C LED Segment Driv...