VRE310
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VRE310 Precision Voltage Reference FEATURES • • • • • • +10 V Output, ±1.0 mV (0.01%) Temperature Drift: 0.6 ppm/°C Low Noise: 6 μVP-P (0.1-10 Hz) Industry Standard Pinout: 8-pin DIP or Surface Mount Package Excellent Line Regulation: 6 ppm/V Typical Output Trim Capability APPLICATIONS The VRE310 is recommended for use as a reference for 14, 16, or 18-bit D/A converters which require an external precision reference. The device is also ideal for calibrating scale factor on high resolution A/D converters. The VRE310 offers superior performance over monolithic references. DESCRIPTION The VRE310 is a low cost, high precision +10 V reference. Available in an industry standard 8-pin DIP or SMT, the device is ideal for upgrading systems that use lower performance references. The device provides ultrastable +10 V output with ±1.0 mV (0.01%) initial accuracy and a temperature coefficient of 0.6 ppm/°C. This improvement in accuracy is made possible by a unique, patented 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 VRE310 series the most accurate reference available in a standard 8-pin DIP or SMT package. For enhanced performance, the VRE310 has an external trim option for users who want less than 0.01% initial error. For ultra low noise applications, an external capacitor can be attached between the noise reduction pin and the ground pin. A reference ground pin is provided to eliminate socket contact resistance errors. SELECTION GUIDE Model Temp. Coeff. (ppm/°C) Package Options © Apex Microtechnology Inc. All rights rese

TYPICAL CONNECTION Noise Reduction Figure 1: Typical Connection Fine Trim

VRE310 SPECIFICATIONS VIN = +15 V, T = +25°C, RL = 10 kΩ Unless Otherwise Noted. ABSOLUTE MAXIMUM RATINGS Parameter Power Supply Storage Temperature Short Circuit Protection ELECTRICAL SPECIFICATIONS Parameter Warmup Drift TMIN - TMAX Long-Term Stability Output Current Line Regulation Output Adjustment Power Supply Current 1. The temp. reference TC is 2.1 mV/°C 2. The specified values are without external trim. 3. The temperature coefficient is determined by the box method using the following formula: V MAX – V MIN 6 TC = ---------------------------------------------------------------------...

TYPICAL PERFORMANCE GRAPHS Figure 2: VOUT vs. Temperature Figure 3: VOUTvs. Temperature

Figure 6: PSRR vs. Frequency

VRE310 BLOCK DIAGRAM Figure 7: Block Diagram VIN THEORY OF OPERATION The following discussion refers to the block diagram in Figure 7. 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....

PACKAGE OPTIONS 1. Dimensions are inches & [millimeters]. 2. Bracketed alternate units are for reference only. 3. Pins: Phosphor bronze, Sn/Ag 96/4 solder dipped. 4. Material: Alumina Ceramic substrate and cover.

1. Dimensions are inches & [millimeters], 2. Bracketed alternate units are for reference only. 3. Pins: Phosphor bronze, Sn/Ag 96/4 solder dipped. 4. Material: Alumina Ceramic substrate and cover. 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, IMPORTANT NOTICE Apex...