PPrroodduucctt TIencnhonvoaltoi go yn FFrroomm VRE3025VRE3025 VRE3025 Precision Voltage Reference FEATURES DESCRIPTION The VRE3025 is a low cost, high precision +2.5 V ref- +2.5 V Output, 0.25 mV (.01%) erence that operates from +10 V. The device features Temperature Drift: 0.6 ppm/c a buried zener for low noise and excellent long term Low Noise: 1.5 V (0.1Hz-10Hz) P-P stability. Packaged in either an 8-pin DIP or SMT op- Low Thermal Hysteresis: 1 ppm Typical tion, the device is ideal for high resolution data conver- 15 mA Output Source and Sink Current sion systems. Excellent Line Regulation: 5 ppm/V Typical The device provides ultrastable +2.5 V output with Optional Noise Reduction and Voltage Trim 0.25 mV (.01%) initial accuracy and a temperature Industry Standard Pinout: 8-pin DIP or coefficient of 0.6 ppm/C. This improvement in accu - Surface Mount Package racy is made possible by a unique, patented multipoint laser compensation technique. Significant improve - APPLICATIONS ments have been made in other performance param- The VRE3025 is recommended for use as a refer- eters as well, including initial accuracy, warm-up drift, ence for 14, 16, or 18 bit data converters which re- line regulation, and long-term stability, making the quire an external precision reference. The device VRE3025 series the most accurate reference avail- is also ideal for calibrating scale factor on high able. resolution data converters. The VRE3025 offers For enhanced performance, the VRE3025 has an ex- superior performance over monolithic references. ternal trim option for users who want less than 0.01% initial error. For ultra low noise applications, an exter- nal capacitor can be attached between the noise re- duction pin and the ground pin. Figure 1. BLOCK DIAGRAM 8 2 + 6 - R1 R4 R2 5 R3 4 SELECTION GUIDE Initial Temp. Error Coeff. Temp. Range Package Model (mV) (ppm/C) (C) Options VRE3025AS 0.250 0.6 0C to +70C SMT8 (GF) VRE3025AD 0.250 0.6 0C to +70C DIP8 (KD) VRE3025BS 0.375 1.0 0C to +70C SMT8 (GF) VRE3025BD 0.375 1.0 0C to +70C DIP8 (KD) VRE3025CS 0.500 2.0 0C to +70C SMT8 (GF) VRE3025CD 0.500 2.0 0C to +70C DIP8 (KD) VRE3025JS 0.250 0.6 -40C to +85C SMT8 (GF) VRE3025JD 0.250 0.6 -40C to +85C DIP8 (KD) 8-pin Surface Mount 8-pin DIP VRE3025KS 0.375 1.0 -40C to +85C SMT8 (GF) Package Style GF Package Style KD VRE3025LS 0.500 2.0 -40C to +85C SMT8 (GF) Copyright Cirrus Logic, Inc. 2010 SEP 2010 VRE3025DS 1 (All Rights Reserved) www.cirrus.com APEX VRE3025DSREVHVRE3025 P r o d u c t T e c h n o l o g y F r o m 1. CHARACTERISTICS AND SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Power Supply ........................... -0.3V to +40V Out Short Circuit to GND Duration (V < 12V) ........... Continuous IN OUT, TRIM ................................ -0.3V to +12V Out Short Circuit to GND Duration (V < 40V) .....................5 sec IN NR .............................................. -0.3V to +6V Out Short Circuit to IN Duration (V < 12V) ............... Continuous IN Operating Temp. (A,B,C) ........... 0C to +70C Continuous Power Dissipation (T = +70C) ....................300mW A Operating Temp. (J,L) ............. -40C to +85C Storage Temperature ......................................... -65C to +150C Lead Temperature (soldering,10 sec) .............................. +250C ELECTRICAL SPECIFICATIONS V =15V, T = +25C, R = 10K Unless Otherwise Noted. PS L Parameter Symbol Conditions Min Typ Max Units Input Voltage V +8 +36 V IN VRE3025A/J +2.4998 +2.500 +2.5003 Output Voltage (Note 1) V VRE3025B/K +2.4996 +2.500 +2.5004 V OUT VRE3025C/L +2.4995 +2.500 +2.5005 VRE3025A/J 0.3 0.6 Output Voltage Temperature Coefficient TCV VRE3025B/K 0.5 1.0 ppm/C OUT (Note 2) VRE3025C/L 1.0 2.0 Trim Adjustment Range V Figure 3 2.5 mV OUT Turn-On Settling Time T To 0.01% of final value 2 s ON 0.1Hz < f < 10Hz 1.5 Vp-p Output Noise Voltage e n 10Hz < f < 1kHz 1.5 3.0 V RMS Temperature Hysterisis Note 4 1 ppm Long Term Stability V 6 ppm/1000hrs. OUT/t Supply Current I 3.5 4.0 mA IN Sourcing: 0mA I 15mA 8 12 OUT Load Regualtion V / I ppm/mA OUT OUT Sinking: -15mA I 0mA 8 12 OUT 8V V 10V 25 35 IN Line Regulation V / V ppm/V OUT IN 10V V 18V 5 10 IN NOTES: 1. The specified values are without external trim. 2. The temperature coefficient is determined by the box method. See discussion on temperature perfor - mance. 3. Line and load regulation are measured with pulses and do not include voltage changes due to tem- perature. 4. Hysterisis over the operating temperature range. 2 VRE3025DS