VRE3025 RoHS Precision Voltage Reference COMPLIANT FEATURES +2.5 V Output, 0.375 mV Temperature Drift: 1.0 ppm/C Low Noise: 1.5 V (0.1 Hz-10 Hz) P-P Low Thermal Hysteresis: 1 ppm Typical 15 mA Output Source and Sink Current Excellent Line Regulation: 5 ppm/V Typical Optional Noise Reduction and Voltage Trim Industry Standard Pinout: 8-pin DIP or Surface Mount Package APPLICATIONS The VRE3025 is recommended for use as a reference for 14 and 16 bit data converters which require an external precision reference. The device is also ideal for calibrating scale factor on high resolution data con- verters. The VRE3025 offers superior performance over monolithic references. DESCRIPTION The VRE3025 is a low cost, high precision +2.5 V reference that operates from +10 V. The device features a buried zener for low noise and excellent long term stability. Packaged in either an 8-pin DIP or SMT option, the device is ideal for high resolution data conversion systems. The device provides ultrastable +2.5 V output with 0.375 mV initial accuracy and a temperature coeffi- cient of 1.0 ppm/C. This improvement in accuracy is made possible by a unique, patented multi-point 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 VRE3025 series the most accurate reference available. For enhanced performance, the VRE3025 has an external trim option for users who want less than 0.375 mV initial error. For ultra low noise applications, an external capacitor can be attached between the noise reduction pin and the ground pin. A ceramic input filter capacitor of 0.1F is recommended to ensure output stability. SELECTION GUIDE Initial Error Temp. Coeff. Temp Range Package Model (mV) (ppm/C) (C) Options VRE3025BS 0.375 1.0 0C to +70C SMT8 (GF) VRE3025BD 0.375 1.0 0C to +70C DIP8 (KD) VRE3025JS 0.250 0.6 -40C to +85C SMT8 (GF) VRE3025LS 0.500 2.0 -40C to +85C SMT8 (GF) Apex Microtechnology Inc. Oct 2017 www.apexanalog.com All rights reserved VRE3025DS Rev PVRE3025 TYPICAL CONNECTION Figure 1: Typical Connection + V IN 2 + V OUT Optional Noise 8 6 Reduction Capacitor VRE3025 C N Input Filter C IN Capacitor 0.1F 5 1F 10 k 4 Optional Fine Trim Adjustment GND PIN DESCRIPTIONS Pin Number Name Description 1, 3, 7 NC No connection. V 2 The supply voltage connection. IN 4GND Ground. 5 TRIM Optional fine adjustment. Connect to a voltage divider between OUT and GND. 6 OUT 2.5 V output. 8 NR Optional noise reduction. Connect a 1F capacitor between this pin and GND. 2 VRE3025DS Rev P