VRE102
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VRE102 Precision Voltage Reference FEATURES • • • • • • • Very High Accuracy: ±10 V Output, ±1.0 mV Extremely Low Drift: 1.09 ppm/°C (-55°C to +125°C) Low Warm-up Drift: 1.0 ppm Typical Excellent Stability: 6 ppm/1000 hrs. Typical Excellent Line Regulation: 3 ppm/V Typical 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 DESCRIPTION VRE102 Precision Voltage Reference provides ultrastable ±10 V outputs with ±1.0 mV initial accuracy and temperature coefficient as low as 1.09 ppm/°C over the full military temperature range. This improvement 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 VRE102 the most accurate and stable 10 V reference available. VRE100/102 devices are available in two operating temperature ranges, -25°C to +85°C and -55°C to +125°C, and two performance grades. All devices are packaged in 14-pin hermetic ceramic packages for maximum long-term stability. “M” versions are screened for high reliability and quality. Superior stability, accuracy, and quality make this reference ideal for precision applications such as A/D and D/A converters, high-accuracy test and measurement instrumentation, and transducer excitation. SELECTION GUIDE Model VRE102C Temperature Volt Deviation Operating (Max) Range -25°C to +85°C

TYPICAL CONNECTION Figure 1: Typical Connection

VRE102 SPECIFICATIONS VPS = ±15 V, T = 25°C, RL = 10 kΩ unless otherwise noted. ABSOLUTE MAXIMUM RATINGS Parameter Operating Temperature Storage Temperature Power Supply Short Circuit Protection ELECTRICAL SPECIFICATIONS Parameter Output Voltage Initial Error Warmup Drift TMIN - TMAX Long-Term Stability Output Current Line Regulation Load Regulation Output Adjustment Temperature Coefficient Power Supply Current, VRE102 +PS 2 Power Supply Current, VRE102 -PS 2 1. Using the Box Method, the specified value is the maximum deviation from the output voltage at 25°C over the specified operating...

VRE102 TYPICAL PERFORMANCE GRAPHS Figure 2: VOUT vs. Temperature (VRE102C) Upper Limit Upper Limit Figure 3: VOUT vs. Temperature (VRE102CA) Figure 4: VOUT vs. Temperature (VRE102M) Upper Limit

Figure 5: Quiescent Current vs. Figure 6: Junction Temp. Rise vs. Output Current

Figure 8: Quiescent Current vs. Figure 9: Junction Temp. Rise vs. Output Current Figure 10: PSRR vs. Frequency

VRE102 BLOCK DIAGRAM Figure 11: Block Diagram THEORY OF OPERATION The following discussion refers to the block diagram in Figure 11. In operation, approximately 6.3 V is applied to the noninverting input of the op amp. The voltage is amplified by the op amp to produce a 10 V output. The gain is determined by the networks R1 and R2: G=1 + R2/R1. The 6.3 V zener diode is used because it is the most stable diode over time and temperature. The zener operating current is derived from the regulated output voltage through R3. This feedback arrangement provides a closely regulated zener current....

into place the contact resistance is sufficiently small that it doesn't affect performance. The VRE series volt- age references can be connected with or without the use of pin 6 and still provide superior performance.

PACKAGE OPTIONS 1. Dimensions are inches & [millimeters]. 2. Bracketed alternate units are for reference only. 3. Pins: Phosphor bronze, Gold over Nickel plated. 4. Material: Alumina Ceramic substrate and cover. 5. Cover: Electroless Nickel plated.

NEED TECHNICAL HELP? CONTACT APEX SUPPORT! For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact apex.support@apexanalog.com. International customers can also request support by contacting their local Apex Microtechnology Sales Representative. To find the one nearest to you, go to www.apexanalog.com IMPORTANT NOTICE Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change without notice and is...