ICL7106/7107 Description The ICL7106 and ICL7107 are high performance,low power 3 1 / 2 digit A/D converters. Included are seven segment decoders, display drivers, a reference, and a clock. The ICL7106 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive, the ICL7107 will directly drive an instrument size light emitting diode (LED) display. The ICL7106 and ICL7107 bring together a combination of high accuracy, versatility, and true economy. True differential inputs and reference are useful in all systems, but give the designer an uncommon advantage when measuring load cells, strain gauges and other bridge type transducers. Finally he true economy of single power Supply operation ( ICL7106 ), enables a high performance panel meter to be built with the addition of only 10 passive display. Components and a ICL7106, ICL7107 TOP VIEW Features V+ D1 1 40 OSC 1 2 39 OSC 2 • Guaranteed Zero Reading for 0V input on All Scales C1 3 38 OSC 3 • True Polarity at Zero for Precise Null Detection B1 4 A1 5 37 TEST 36 REF HI (1’ s) • True Differential input and Reference, Direct Display • Drive - LCD ICL7106 - LED ICL7107 F1 6 G1 7 E1 8 35 REF LO 34 CREF+ CREF33 COMMON 32 IN HI D2 9 C2 10 B2 11 A2 12 • Low Power DissipationTypically Less Than 10mW F2 13 • No Additional Active Circuits Required E2 14 D3 15 27 Vs) 26 G2 (10’ • Low Noise-Less Than 15 uVp-p (10’ s) • On Chip Clock and Reference • New Small Outline Surface Mount Package Available 31 IN LO 30 A-Z 29 BUFF 28 INT B3 16 25 C3 -F3 17 24 A3 E3 18 23 (1000) AB4 19 22 G3 POL 20 21 BP/GND (100’ s) (MINUS) Absolute Maximum Ratings Supply Voltage ICL7106, V+ to V-.......................................................15V ICL7107, V+ to GND...................................................6V ICL7107, V- to GND....................................................-9V Analog input Voltage (Either input) (Note 1)..................V+ to VReference input Voltage (Either input)...........................V+ to VClock input ICL7106......................................................TEST to V+ ICL7107.......................................................GND to V+ BEIJING ESTEK ELECTRONICS CO.,LTD 1 ICL7106/7107 Electrical Characteristics Parameters Test conditions Min VIN = 0.0V, Full-Scale = 200mV VIN = V REF , V REF= 100mV -V IN = +V IN 200mV Difference in Reading for Equal Positive and Negative inputs Near Full-Scale Full-Scale = 200mV or Full-Scale = 2V Maximum Deviation from Best Straight Line Fit (Note 5) -000.0 Typ Max Unit SYSTEMS PEREFORMANCE Zero input Reading Ratiometric Reading Rollover Error Linearity Common Mode rejection Ratio VCM = 1V, V IN = 0V, 200mV (Note 5) End Power Supply Character V+ Supply Current VIN = 0 (Does Not include LED Current for ICL7107) ICL7107 Only End Power Supply Character VSupply Current COMMON Pin Analog Common Voltage DISPLAY DRIVER ICL7106 ONLY Pk-Pk Segment Drive Voltage Pk-Pk Backplane Drive Voltage ICL7107 Segment ONLY Sinking Current Full-Scale = 25 k W Between Common and Positive Supply (With Respect to + Supply) V+ = to V- = 9V 999 -1 ± 000.0 999/1000 – ± 000.0 Digital Reading 1000 +1 Digital Reading Counts -1 – +1 Counts - 50 - uV/V - – 1.8 mA - – 1.8 mA 2.4 – 3.2 V 4 5 6 V 5 10 8 16 – – mA mA 4 7 – mA V+ = 5V, Segment Voltage = 3V (Except Pin 19 and 20) Pin 19 Only Pin 20 Only NOTES: 1. Input voltages may exceed the supply voltages provided the input current is limited to 2. Unless otherwise noted, specifications apply to both the ICL7106 and ICL7107 at TA = +25 tested in the circuit of Figure 1. ICL7107 is tested in the circuit of Figure 2. 3. Not tested, guaranteed by design. uA °± C, fCLOCK= 48kHz. ICL7106 is BEIJING ESTEK ELECTRONICS CO.,LTD 2 ICL7106/7107 Typical Applications Circuit Figure 1. ICL7106 Test circuit and typical application with LCD display components selected for 200 mV full scale BEIJING ESTEK ELECTRONICS CO.,LTD 3 ICL7106/7107 Figure 2. ICL7107 Test circuit and typical application with LED display components selected for 200 mV full scale Ordering Information O RDERING NUM BER ICL7107 Address : P ACK AG E M ARKIN G DIP - 40 ICL7107 6A06--6A07 Rm 6A07,Changyin Office Building ,No.88,Yong Ding Road,Hai Dian District ,Beijing Postalcode:100039 Tel: 86-010-58895780 / 81 / 82 / 83 / 84 Fax : 010-58895793 Http://www.estek.com.cn Email:[email protected] REV No:01-060811 BEIJING ESTEK ELECTRONICS CO.,LTD 4