Order this document by MC1403/D A precision band–gap voltage reference designed for critical instrumentation and D/A converter applications. This unit is designed to work with D/A converters, up to 12 bits in accuracy, or as a reference for power supply applications. • Output Voltage: 2.5 V 25 mV • • • • • • • PRECISION LOW VOLTAGE REFERENCE SEMICONDUCTOR TECHNICAL DATA " Input Voltage Range: 4.5 V to 40 V Quiescent Current: 1.2 mA Typical P1 SUFFIX PLASTIC PACKAGE CASE 626 Output Current: 10 mA Temperature Coefficient: 10 ppm/°C Typical 8 1 Guaranteed Temperature Drift Specification D SUFFIX PLASTIC PACKAGE CASE 751 (SO–8) Equivalent to AD580 8 Standard 8–Pin DIP, and 8–Pin SOIC Package 1 Typical Applications • • • • Voltage Reference for 8 to 12 Bit D/A Converters PIN CONNECTIONS Low TC Zener Replacement Vin 1 8 NC Vout 2 7 NC Gnd 3 6 NC NC 4 5 NC High Stability Current Reference Voltmeter System Reference MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.) Symbol Value Unit VI 40 V Storage Temperature Tstg – 65 to 150 °C Junction Temperature TJ +175 °C Operating Ambient Temperature Range MC1403B MC1403 TA Rating Input Voltage °C °C – 40 to +85 0 to + 70 ORDERING INFORMATION Device MC1403D MC1403P1 MC1403BD MC1403BP1 Operating Temperature Range TA = 0° to +70°C TA = – 40° to +85°C Package SO–8 Plastic DIP SO–8 Plastic DIP Figure 1. A Reference for Monolithic D/A Converters + 5.0 V 1 MC1403 3 2 2.5 V Full Scale Adjust 500 Ω 1.0 k R1 R2 Reference Amplifier IRef *0.1 µF C1 Providing the Reference Current for Motorola Monolithic D/A Converters The MC1403 makes an ideal reference for many monolithic D/A converters, requiring a stable current reference of nominally 2.0 mA. This can be easily obtained from the MC1403 with the addition of a series resistor, R1. A variable resistor, R2, is recommended to provide means for full– scale adjust on the D/A converter. 1.2 k R3 * Caution: System stability may be affected if output capacitance * exceeds 1.0 µF. Using higher capacitance values is not * recommended and should be carefully considered. The resistor R3 improves temperature performance by matching the impedance on both inputs of the D/A reference amplifier. The capacitor decouples any noise present on the reference line. It is essential if the D/A converter is located any appreciable distance from the reference. A single MC1403 reference can provide the required current input for up to five of the monolithic D/A converters. Motorola, Inc. 1996 MOTOROLA ANALOG IC DEVICE DATA Monolithic D/A Converter Rev 1 1 MC1403, B ELECTRICAL CHARACTERISTICS (Vin = 15 V, TA = 25°C, unless otherwise noted.) Characteristic Output Voltage (IO = 0 mA) Temperature Coefficient of Output Voltage* MC1403 Symbol Min Typ Max Unit Vout 2.475 2.5 2.525 V ∆VO/∆T – 10 40 ppm/°C ∆VO Output Voltage Change* (Over specified temperature range) MC1403B 0 to + 70°C MC1403B – 40 to + 85°C mV – – – – 7.0 12.5 – – 1.2 0.6 4.5 3.0 Line Regulation (IO = 0 mA) (15 V VI 40 V) (4.5 V VI 15 V) Regline Load Regulation (0 mA < IO < 10 mA) Regload – – 10 mV IQ – 1.2 1.5 mA Quiescent Current (IO = 0 mA) mV * Guaranteed but not tested. Figure 2. MC1403, B Schematic Vin 2.0 k 2.0 k 2.0 k 2.0 k 1.0 k 32 Vout 1.5 k C1 30 pF 1.73 k 2.37 k 10 k 1.483 k 1.0 k 5.61 k This device contains 15 active transistors. 2 MOTOROLA ANALOG IC DEVICE DATA MC1403, B Figure 4. Change in Output Voltage versus Load Current Figure 3. Typical Change in Vout versus Vin (Normalized to Vout @ Vin = 15 V, Iout = 0 mA) ∆Vout , CHANGE IN OUTPUT VOLTAGE (mV) (Normalized to Vin = 15 V @ TC = 25°C) ∆ Vout , CHANGE IN Vout (mV) 2.0 1.0 25°C 0 –1.0 0°C –2.0 75°C –3.0 –4.0 –5.0 –6.0 0 10 20 30 Vin, INPUT VOLTAGE (V) 40 10 9.0 8.0 7.0 6.0 5.0 4.0 75°C 3.0 2.0 0°C 1.0 0 50 25°C 0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Iout, OUTPUT CURRENT (mA) 8.0 9.0 10 Figure 5. Quiescent Current versus Temperature Figure 6. Change in Vout versus Temperature (Vin = 15 V, Iout = 0 mA) (Normalized to Vout @ Vin = 15 V) 1.20 ∆ Vout , CHANGE IN Vout (mV) I1, QUIESCENT CURRENT (mA) 1.25 1.15 1.10 1.05 1.00 0.95 0.90 0 –40 –30 –20 –10 Iout = 2 mA Vin = 15 V 0 –2.0 Vin = 5.0 V –4.0 –6.0 –8.0 –10 –12 0 10 20 30 40 50 TA, TEMPERATURE (°C) 60 70 –14 –40 –30 –20 –10 80 85 0 10 20 30 40 50 TA, TEMPERATURE (°C) 60 70 80 85 Figure 7. Change in Vout versus Temperature (Normalized to TA = 25°C, Vin = 15 V, Iout = 0 mA) ∆ Vout , CHANGE IN Vout (mV) 4.0 2.0 IO = 0 mA = 2.0 mA 0 –2.0 = 8.0 mA –4.0 = 5.0 mA –6.0 –8.0 –10 –12 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 85 TA, TEMPERATURE (°C) MOTOROLA ANALOG IC DEVICE DATA 3 MC1403, B done by dividing the EOC pulse rate by 2 with 1/2 MC14013B flip–flop and blanking the display using the blanking input of the MC14543B. The display uses an LED display with common anode digit lines driven with an MC14543B decoder and an MC1413 LED driver. The MC1413 contains 7 Darlington transistor drivers and resistors to drive the segments of the display. The digit drive is provided by four MPS–A12 Darlington transistors operating in an emitter–follower configuration. The MC14543B, MC14013B and LED displays are referenced to VEE via Pin 13 of the MC14433. This places the full power supply voltage across the display. The current for the display may be adjusted by the value of the segment resistors shown as 150 Ω in Figure 8. 3–1/2–Digit Voltmeter – Common Anode Displays, Flashing Overrange An example of a 3–1/2–digit voltmeter using the MC14433 is shown in the circuit diagram of Figure 8. The reference voltage for the system uses an MC1403 2.5 V reference IC. The full scale potentiometer can calibrate for a full scale of 199.9 mV or 1.999 V. When switching from 2.0 V to 200 mV operation, RI is also changed, as shown on the diagram. When using RC equal to 300 kΩ, the clock frequency for the system is about 66 kHz. The resulting conversion time is approximately 250 ms. When the input is overrange, the display flashes on and off. The flashing rate is one–half the conversion rate. This is Figure 8. 3–1/2–Digit Voltmeter MC1403 20 k 2 –5.0 V 0.1 µF +5.0 V 3 0.1 µF 300 k RC 11 10 VX 2 MC14433 0.1 µF ** 13 7 8 0.1 µF 4 1 2 3 5 23 22 21 20 4 5 6 +5.0 V 0.1 µF 12 24 3 1 RI * +5.0 V 0.1 µF –5.0 V 6 8 9 14 Segment Resistors 150 Ω (7) 16 9 7 6 5 4 3 2 1 10 11 12 13 14 15 7 –5.0 V MC1413 1 MC14543B +5.0 V –5.0 V Minus Sign –5.0 V 15 19 18 17 16 –5.0 V 6 DS2 5 DS3 3 DS4 D C S R Q Q 1 2 51 k MC14013B 4 +5.0 V 8 9 D S Q 13 11 C Q 12 R 14 7 10 * RI = 470 kΩ for 2.0 V Range RI = 27 kΩ for 200 mV Range ** Mylar Capacitor –5.0 V 4 f g e d c b a 200 Ω MPS–A12 Plus Sign 110 Ω 5.0 V DS1 10 11 12 13 14 15 16 50 µF Common Anode LED Display 0.1 µF –5.0 V MPS–A12 (4) +5.0 V MOTOROLA ANALOG IC DEVICE DATA MC1403, B OUTLINE DIMENSIONS P1 SUFFIX PLASTIC PACKAGE CASE 626–05 ISSUE K 8 5 NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. –B– 1 4 F DIM A B C D F G H J K L M N –A– NOTE 2 L C J –T– N SEATING PLANE D M K MILLIMETERS MIN MAX 9.40 10.16 6.10 6.60 3.94 4.45 0.38 0.51 1.02 1.78 2.54 BSC 0.76 1.27 0.20 0.30 2.92 3.43 7.62 BSC ––– 10_ 0.76 1.01 INCHES MIN MAX 0.370 0.400 0.240 0.260 0.155 0.175 0.015 0.020 0.040 0.070 0.100 BSC 0.030 0.050 0.008 0.012 0.115 0.135 0.300 BSC ––– 10_ 0.030 0.040 G H 0.13 (0.005) M T A M B M D SUFFIX PLASTIC PACKAGE CASE 751–05 (SO–8) ISSUE N NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. –A– 8 5 –B– 1 4X P 0.25 (0.010) 4 M B M G R C –T– 8X K D 0.25 (0.010) M T B SEATING PLANE S A M_ S MOTOROLA ANALOG IC DEVICE DATA X 45 _ F J DIM A B C D F G J K M P R MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.18 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.189 0.196 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.007 0.009 0.004 0.009 0_ 7_ 0.229 0.244 0.010 0.019 5 MC1403, B NOTES 6 MOTOROLA ANALOG IC DEVICE DATA MC1403, B NOTES MOTOROLA ANALOG IC DEVICE DATA 7 MC1403, B Motorola reserves the right to make changes without further notice to any products herein. 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