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1、? ? SEMICONDUCTOR TECHNICAL DATA PRECISION LOW VOLTAGE REFERENCE ORDERING INFORMATION Order this document by MC1403/D P1 SUFFIX PLASTIC PACKAGE CASE 626 D SUFFIX PLASTIC PACKAGE CASE 751 (SO8) NC NC NC NC81 3 Vout Gnd 4 2 NC 7 Vin 6 5 8 1 8 1 Device Operating Temperature RangePackage MC1403D MC1403P
2、1 MC1403BD MC1403BP1 TA = 0 to +70C Plastic DIP SO8 SO8 Plastic DIP TA = 40 to +85C PIN CONNECTIONS 1 MOTOROLA ANALOG IC DEVICE DATA ? ? ? A precision bandgap voltage reference designed for critical instrumentation and D/A converter applications. This unit is designed to work with D/A converters, up
3、 to 12 bits in accuracy, or as a reference for power supply applications. Output Voltage: 2.5 V ?25 mV Input Voltage Range: 4.5 V to 40 V Quiescent Current: 1.2 mA Typical Output Current: 10 mA Temperature Coefficient: 10 ppm/C Typical Guaranteed Temperature Drift Specification Equivalent to AD580 S
4、tandard 8Pin DIP, and 8Pin SOIC Package Typical Applications Voltage Reference for 8 to 12 Bit D/A Converters Low TC Zener Replacement High Stability Current Reference Voltmeter System Reference MAXIMUM RATINGS (TA = 25C, unless otherwise noted.) RatingSymbolValueUnit Input VoltageVI40V Storage Temp
5、eratureTstg65 to 150C Junction TemperatureTJ+175C Operating Ambient Temperature Range MC1403B MC1403 TA 40 to +85 0 to +70 C C Figure 1. A Reference for Monolithic D/A Converters * Caution: System stability may be affected if output capacitance * exceeds 1.0 F. Using higher capacitance values is not
6、 * recommended and should be carefully considered. MC1403 1.0 k 3 21 +5.0 V 1.2 k R3 IRef Full Scale Adjust 500 Monolithic D/A Converter *0.1 F C1 R2R1 Reference Amplifier Providing the Reference Current for Motorola Monolithic D/A Converters The MC1403 makes an ideal reference for many mono- lithic
7、 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. The resistor R3 improves temperature
8、 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 curre
9、nt input for up to five of the monolithic D/A converters. 2.5 V Motorola, Inc. 1996Rev 1 MC1403, B 2MOTOROLA ANALOG IC DEVICE DATA ELECTRICAL CHARACTERISTICS (Vin = 15 V, TA = 25C, unless otherwise noted.) CharacteristicSymbolMinTypMaxUnit Output VoltageVout2.4752.52.525V (IO = 0 mA) Temperature Coe
10、fficient of Output Voltage*VO/T1040ppm/C MC1403 Output Voltage Change*VOmV (Over specified temperature range) MC1403B0 to +70C MC1403B40 to +85C 7.0 12.5 Line Regulation (IO = 0 mA)ReglinemV (15 V ? VI ? 40 V) (4.5 V ? VI ? 15 V) 1.2 0.6 4.5 3.0 Load RegulationRegload10mV (0 mA IO 10 mA) Quiescent C
11、urrentIQ1.21.5mA (IO = 0 mA) * Guaranteed but not tested. Figure 2. MC1403, B Schematic 1.73 k 1.5 k Vout 32 1.483 k10 k Vin 2.0 k2.0 k 30 pF C1 2.37 k 1.0 k 5.61 k 2.0 k1.0 k2.0 k This device contains 15 active transistors. MC1403, B 3 MOTOROLA ANALOG IC DEVICE DATA V, CHANGE IN Vout(mV) out V, CHA
12、NGE IN Vout(mV) out 10 12 TA, TEMPERATURE (C) 4.0 2.0 0 2.0 4.0 6.0 8.0 TA, TEMPERATURE (C) 12 10 8.0 6.0 4.0 2.0 0 14 Figure 3. Typical Change in Vout versus Vin (Normalized to Vin = 15 V TC = 25C) Figure 4. Change in Output Voltage versus Load Current (Normalized to Vout Vin = 15 V, Iout = 0 mA) V
13、in, INPUT VOLTAGE (V) 2.0 1.0 0 1.0 2.0 3.0 4.0 5.0 6.0 01020304050 V, CHANGE IN Vout(mV) out 25C 0C 75C Iout, OUTPUT CURRENT (mA) Vout, CHANGE IN OUTPUT VOLTAGE (mV) 10 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 01.02.03.04.05.06.07.08.09.010 75C 0C 25C Figure 5. Quiescent Current versus Temperature (Vi
14、n = 15 V, Iout = 0 mA) I1, QUIESCENT CURRENT (mA) TA, TEMPERATURE (C) 0 1.25 1.20 1.15 1.10 1.05 1.00 0.95 0.90 8060402004020 Figure 6. Change in Vout versus Temperature (Normalized to Vout Vin = 15 V) Figure 7. Change in Vout versus Temperature (Normalized to TA = 25C, Vin = 15 V, Iout = 0 mA) 8570
15、5030101030806040200402085705030101030 Vin = 5.0 V Vin = 15 V Iout = 2 mA 806040200402085705030101030 IO = 0 mA = 2.0 mA = 5.0 mA = 8.0 mA MC1403, B 4MOTOROLA ANALOG IC DEVICE DATA 31/2Digit Voltmeter Common Anode Displays, Flashing Overrange An example of a 31/2digit voltmeter using the MC14433 is s
16、hown 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 k, the clock frequency for the system is
