VRE410CS

VRE410 VRE410 ® P r o VRE410 dd uu cc tt IInnnnoovvaatti ioonn FFr roomm Precision Dual Voltage Reference FEATURES ♦ ±10 V Output, ± 1.6 mV ♦ Temperature Drift: 1.0 ppm/ºC ♦ Low Noise: 6 μVP-P (0.1-10Hz) ♦ Tracking Error: 0.3 mV ♦ Excellent Line Regulation: 6 ppm/V Typical ♦ Surface Mount Package APPLICATIONS The VRE410 is recommended for use as a reference for high precision D/A and A/D converters which require an external precision reference. The device is also ideal for calibrating scale factor on high resolution A/D converters. The VRE410 offers superior performance over monolithic references. DESCRIPTION The VRE410 is a low cost, high precision, ±10 V reference. Available in a 14-pin SMT package, the device is ideal for new designs that need a high performance reference. The device provides ultrastable ±10 V output with ±1.6 mV initial accuracy and a temperature coefficient of 1.0 ppm/°C. This improvement in accuracy is made possible by a unique, patented multipoint laser compensation technique. Another key feature of this reference is the 0.5 mV tracking error between the positive and negative output voltages over the full operating temperature range. This is extremely important in high performance systems for reducing overall system errors. Figure 1. BLOCK DIAGRAM SELECTION GUIDE Model VRE410A VRE410B VRE410C VRE410J VRE410L VRE410DS Initial Error Temp. Coeff. (mV) (ppm/ºC) ±1.6 ±2.0 ±2.2 ±1.6 ±2.2 www.cirrus.com 1.0 2.0 2.2 1.0 2.2 Temp. Range (ºC) 0ºC to +70ºC 0ºC to +70ºC 0ºC to +70ºC -40ºC to +85ºC -40ºC to +85ºC Copyright © Cirrus Logic, Inc. 2010 (All Rights Reserved) 14-pin Surface Mount Package Style GE JUN 20101 APEX − VRE410DSREVE VRE410 Product Innovation From 1. CHARACTERISTICS AND SPECIFICATIONS ELECTRICAL SPECIFICATIONS VPS =±15V, T = +25ºC, RL = 10KΩ Unless Otherwise Noted. Model A/J Parameter B C/L Min Typ Max Min Typ Max Min Typ Max Units ±13.5 ±15 ±22 * * * * * * V +70 * * * * ºC ABSOLUTE RATINGS Power Supply Operating Temperature (A,B,C) 0 Operating Temperature (J,L) -40 +85 * * * * ºC Storage Temperature -65 +150 * * * * ºC Short Circuit Protection Continuous * * ±10.0 * * OUTPUT VOLTAGE VRE410 V OUTPUT VOLTAGE ERRORS Initial Error (Note 1) ±1.60 Warmup Drift ±2.00 1 TMIN - TMAX (Note 2) Tracking Error (Note 3) 2 1.0 ±2.20 3 2.0 mV ppm 2.2 ppm/ºC 0.5 0.7 1.0 mV Long-Term Stability 6 * * ppm/1000hrs. Noise (0.1 - 10Hz) 6 * * µVpp OUTPUT CURRENT Range ±10 * mA REGULATION Line 3 * * ppm/V Load 3 * * ppm/mA +PS 7 * * mA -PS 4 * * mA POWER SUPPLY CURRENT (Note 4) NOTES: * Same as A/J Models. 1. The specified values are without external trim. 2. The temperature coefficient (TC) is determined by the box method using the following formula: T.C. = 2 VMAX – VMIN x 106 VNOMINAL x (TMAX – TMIN) 3. The tracking error is the deviation between the positive and negative output over the operating temp. range. 4. The specified values are unloaded. VRE410DS VRE410 Product Innovation From 2. TYPICAL PERFORMANCE CURVES VOUT vs. TEMPERATURE 2 1.5 Lower Limit -1 -1.5 0 10 20 30 40 50 60 70 Temperature, °C VRE410A ∆VOUT (mV) 4 0.5 0 -0.5 -1 -1.5 Lower Limit 0 4 3 2 2 Upper Limit 0 Lower Limit -2 -2 10 20 30 40 50 60 70 Temperature, °C VRE410B 3 -1 0 -0.5 -1 VOUT vs. TEMPERATURE 1 0.5 -1.5 -2 Upper Limit 1 ∆VOUT (mV) 0 -0.5 VOUT vs. TEMPERATURE 1.5 1 Upper Limit ∆VOUT (mV) ∆VOUT (mV) 1 2 Upper Limit 1.5 0.5 -2 VOUT vs. TEMPERATURE ∆VOUT (mV) 2 Lower Limit 10 20 30 40 50 60 70 Temperature, °C VRE410C VOUT vs. TEMPERATURE Upper Limit 1 0 -1 -2 -3 -3 -4 -40 -4 -40 -15 10 35 60 Temperature, °C VRE410J 0 85 Lower Limit -15 10 35 60 Temperature, °C VRE410L 85 POSITIVE OUTPUT (TYP) QUIESCENT CURRENT VS. TEMP Temperature oC JUNCTION TEMP. RISE VS. OUTPUT CURRENT Output Current (mA) PSRR VS. FREQUENCY Frequency (Hz) NEGATIVE OUTPUT (TYP) QUIESCENT CURRENT VS. TEMP Temperature oC VRE410DS JUNCTION TEMP. RISE VS. OUTPUT CURRENT Output Current (mA) PSRR VS. FREQUENCY Frequency (Hz) 3 VRE410 Product Innovation From 3. THEORY OF OPERATION The following discussion refers to the block diagram in Figure 1. 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. This current determines the slope of the references’ voltage vs. temperature function. By trimming the zener current a lower drift over temperature can be achieved. But since the voltage vs. temperature function is nonlinear this compensation technique is not well suited for wide temperature ranges. A nonlinear compensation network of thermistors and resistors is used in the VRE series voltage references. This proprietary network eliminates most of the nonlinearity in the voltage vs. temperature function. By then adjusting the slope, a very stable voltage is produced over wide temperature ranges. The VRE400 series voltage references have the ground terminal brought out on two pins (pin 6 and 7) which are connected together internally. This allows the user to achieve greater accuracy when using a socket. Voltage references have a voltage drop across their power supply ground pin due to quiescent current flowing through the contact resistance. If the contact resistance was constant with time and temperature, this voltage drop could be trimmed out. When the reference is plugged into a socket, this source of error can be as high as 20 ppm. By connecting pin 7 to the power supply ground and pin 6 to a high impedance ground point in the measurement circuit, the error due to the contact resistance can be eliminated. If the unit is soldered into place the contact resistance is sufficiently small that it doesn’t effect performance. PIN CONFIGURATION N/C 1 14 N/C VOUT 2 13 +VOUT N/C 3 VRE410 12 N/C - VIN 4 11 +VIN N/C 5 TOP VIEW 10 N/C REF. GND 6 9 N/C GND 7 8 N/C - 4. POWER SUPPLY SEQUENCING Do not operate the VRE410 with only one power supply terminal connected. This device requires the positive power supply voltage to lead the negative power supply voltage. The positive power supply must be applied prior to the negative power supply. CONTACTING CIRRUS LOGIC SUPPORT For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact apex.support@cirrus.com. International customers can also request support by contacting their local Cirrus Logic Sales Representative. To find the one nearest to you, go to www.cirrus.com IMPORTANT NOTICE Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. 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