Precision Voltage Reference FEATURES ♦ Very High Accuracy: ±5 V, ±0.8 mV ♦ Extremely Low Drift: 1.33 ppm/°C (-55°C to +125°C) ♦ Excellent Stability: 6 ppm/1000 Hrs. Typical ♦ Excellent Line Regulation: 6 ppm/V Typical ♦ Wide Supply Range: ±13.5 V to ±22 V ♦ Hermetic 14-pin Ceramic DIP ♦ Military Processing Option ♦ Precision A/D and D/A Converters ♦ Transducer Excitation ♦ Accurate Comparator Threshold Reference ♦ High Resolution Servo Systems ♦ Digital Voltmeters ♦ High Precision Test and Measurement Instruments VRE107 Series Precision Voltage References provide ultrastable ±5 V outputs with ±0.8 mV initial accuracy and temperature coefficient as low as 1.33 ppm/°C over the full military temperature range. This impovement in accuracy is made possible by a unique, proprietary multipoint laser compensation technique. Significant improvements have been made in other performance parameters as well, including initial accuracy, warm-up drift, line regulation, and long-term stability, making the VRE107 series the most accurate and stable 5 V references available. VRE107 series devices are available in two performance grades. All devices are packaged in 14-pin hermetic ceramic packages for maximum long-term stablity. “M” versions are screened for high reliability and quality. Superior stability, accuracy, and quality make these references ideal for precision applications such as A/D and D/A converters, high accuracy test and measurement instrumentation, and tranducer excitation. Figure 1. BLOCK DIAGRAM Copyright © Apex Microtechnology, Inc. 2012 (All Righ

VRE107 SELECTION GUIDE Output (V) Temperature Operating Range Hermetic 14-pin Ceramic DIP Package Style HC ELECTRICAL SPECIFICATIONS VPS =±15V, T = +25°C, RL = 10K Ω UNLESS OTHERWISE NOTED. Model Parameter ABSOLUTE MAXIMUM RATINGS Power Supply Operating Temperature Storage Temperature Short Circuit Protection OUTPUT VOLTAGE ERRORS Initial Error Warmup Drift TMIN - TMAX Long-Term Stability OUTPUT CURRENT Range REGULATION Line Temperature Coefficient OUTPUT ADJUSTMENT POWER SUPPLY CURRENT (Note 2) VRE107 +PS NOTES: * Same as M Models. 1. Using the box method, the specified value is the maximum...

TYPICAL PERFORMANCE GRAPHS NEGATIVE OUTPUT QUIESCENT CURRENT VS. TEMP JUNCTION TEMP. RISE VS. OUTPUT CURRENT The following discussion refers to the block diagram in Figure 1. A FET current source is used to bias a 6.3 V zener diode. The zener voltage is divided by the resistor network R1 and R2. This voltage is then applied to the noninvert- ing input of the operational amplifier which amplifies the voltage to produce a 5 V output. The gain is determined by the resistor networks R3 and R4: G=1 + R4/R3. The 6.3 V zener diode is used because it is the most stable diode The current source provides...

VRE107 series references. This proprietary network eliminates most of the nonlinearity in the voltage vs. temperature function. By then adjusting the slope, The VRE107 series produces a very stable voltage over wide temperature ranges. This network is less than 2% of the overall network resistance so it has a negligible effect on long term stability. The proper connection of the VRE107 series voltage reference is shown below with the optional trim resistors. When trimming the VRE107, the positive voltage should be trimmed first since the negative voltage tracks the positive side. Pay careful...