ES5136

ES5136 3 1/2 DIGIT A/D CONVERTER W/LCD(Low power) I、GENERAL DESCRIPTION The ES5136 combines analog section and digital section on a single monolithic CMOS integrated circuit to provide a high performance, very low power 3 1/2 –digit A/D converter. Each device includes a dual slope converter, internal reference, seven segment decoders, display drivers, and clock. The ES5136 is designed to interface with a liquid crystal display and includes a back plane drive. The supply current is only 150µA, very suitable for 9V battery operation. To built a high performance digital panel meter, ES5136 needs only few passive components and a LCD display. The true differential input and reference of ES5136 are versatile and useful in all systems, and these give the designers an uncommon advantage to make the measurement of load cells, train gauges and other bridge type transducers. The ES5136 can be used as a plug-in replacement for the ES5106 in a wide variety of applications by changing only the passive components of the ES5106. The ES5136 differs from the ES5106 in that it includes lower power dissipation, improved temperature coefficient of analog common and scale factor, and the design of ZERO INTEGRATE phase to eliminate the overrange hangover and hysteresis. 1 ES5136 3 1/2 DIGIT A/D CONVERTER W/LCD(Low power) II、FEATURES *Pin compatible with ES5106. *Internal reference with low temperature drift *Direct LCD display drive *No additional active components required *Low input leakage current---1pA typical *Guaranteed zero reading for 0 volts input on all scales *Auto polarity indication *True differential input and reference *Internal clock circuit *Low power consumption III、APPLICATTONS *Digital panel meters *Digital multi-meters *Digital centigrade thermometer *pH meters *Capacitance meters 2 ES5136 3 1/2 DIGIT A/D CONVERTER W/LCD(Low power) IV、PIN ASSIGNMENT 40 PIN DIP Package 3 ES5136 3 1/2 DIGIT A/D CONVERTER W/LCD(Low power) 44PIN QFP Package PIN ASSIGNMENT REF LO 43 REF HI 44 IN LO C 42 IN HI CREF 41 COM BUF REF INT AZ V- + 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 NC NC TEST OSC3 NC OSC2 OSC1 V+ D1 C1 B1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 NC G2 C3 A3 G3 BP POL AB4 E3 F3 B3 ES5136Q A1 F1 G1 E1 D2 C2 B2 A2 F2 E2 D3 4 ES5136 3 1/2 DIGIT A/D CONVERTER W/LCD(Low power) V、BLOCK DIAGRAM 5 ES5136 3 1/2 DIGIT A/D CONVERTER W/LCD(Low power) VI、ABSOLUTE MAXIMUM RATING DC Supply Voltage (between pin 1.V+ and pin 26.V-) ------ 12V Analog Input Voltage (either input) ----------------------------- V+ to VReference Input Voltage(either input) -------------------------- V+ to VClock Input --------------------------------------------------------- TEST to V+ Power Dissipation(plastic package) ----------------------------- 800 mW Operating Temperature ------------------------------------------- 0℃ to + 70℃ Storage Temperature ---------------------------------------------- -65℃ to +150℃ Lead Temperature(during soldering): At distance 1/16±1/32 inch(1.59±0.79mm)from case for 10S max +265℃ VII、ELECTRICAL CHARACTERISTICS AT TA = 25℃,V+ to V- = 9V , fcolock = 48Khz unless otherwise indicated. Refer to Fig.2. CHARACTERISTIC TEST CONDITIONS MIN Zero Input Reading Ratiometric Reading ROLLOVER Error Linearity VIN=0.0V VIN = VREF VREF = 100mV -VIN = +VIN≅200.0mV Full Scale = 200mV or 2V -000.0 999 -1 -1 － － LIMITS TVP ±000.0 999/1000 ±0.2 ±0.2 50 1 MAX +000.0 1000 +1 +1 － 10 UNITS Digital Reading Digital Reading Counts Counts µV/V pA Common Mode Rejection VCM = ± 1V,VIN = 0V Ratio Full Scale = 200.0mV Input Leakage Current VIN = 0V 6 ES5136 3 1/2 DIGIT A/D CONVERTER W/LCD(Low power) ELECTRICAL CHARACTERISTICS(Contd.) LIMITS Min Noise (PK-PK value not VIN = OV exceeded 95% of time) Full Scale = 200mV Zero Reading Drift VIN = 0V 0℃