ADR291WFRZ-R7

Low Noise Micropower 2.5 V Precision Voltage Reference ADR291W CONNECTION DIAGRAM Qualified for automotive applications Supply range 2.8 V to 15 V Supply current: 15 μA maximum Low noise: 8 μV (0.1 Hz to 10 Hz) High output current: 5 mA Temperature range: −40°C to +125°C Pin compatible with REF02/REF19x NC 1 VIN 2 8 ADR291 NC NC TOP VIEW NC 3 (Not to Scale) 6 VOUT 5 NC GND 4 7 NC = NO CONNECT 08554-001 FEATURES Figure 1. 8-Lead SOIC_N (R-8) APPLICATIONS Automotive Li-Ion Battery Measurement Analog-to-digital and digital-to-analog converter reference GENERAL DESCRIPTION The ADR291 is a low noise, micropower precision voltage reference that uses an XFET® reference circuit. The XFET architecture offers significant performance improvements over traditional band gap and buried Zener-based references. Improvements include one quarter of the voltage noise output of band gap references operating at the same current, very low and ultralinear temperature drift, low thermal hysteresis, and excellent longterm stability. Line regulation and load regulation are typically 30 ppm/V and 30 ppm/mA, maintaining the overall high performance of the reference. For a device with 5.0 V output, refer to the ADR293 data sheet. The ADR291 is a series voltage reference providing a stable and accurate output voltage from supplies as low as 2.8 V. The output voltage is 2.5 V. Table 1. ADR291 Product Details Quiescent current is only 12 μA, making these devices ideal for battery-powered instrumentation. Output accuracy is ±8.3 mV maximum. Temperature coefficient is 15 ppm/°C maximum. The ADR291 is specified over the automotive temperature range of −40°C to +125°C. The device is available in the 8-lead SOIC package. Part No. ADR291 Output Voltage (V) 2.500 Accuracy (±%) 0.332 Temperature Coefficient (ppm/°C) Max 15 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2010 Analog Devices, Inc. All rights reserved. ADR291W TABLE OF CONTENTS Features .............................................................................................. 1  ESD Caution...................................................................................4  Applications ....................................................................................... 1  Pin Configuration and Function Descriptions..............................5  Connection Diagram ....................................................................... 1  Terminology .......................................................................................6  General Description ......................................................................... 1  Outline Dimensions ..........................................................................7  Specifications..................................................................................... 3  Ordering Guide .............................................................................7  Electrical Specifications ............................................................... 3  Absolute Maximum Ratings............................................................ 4  REVISION HISTORY 3/10—Revision 0: Initial Version Rev. 0 | Page 2 of 8 ADR291W SPECIFICATIONS ELECTRICAL SPECIFICATIONS VS = 3.0 V to 15 V, TA = 25°C, unless otherwise noted. Table 2. Parameter F GRADE Output Voltage Output Voltage Variation1 LINE REGULATION F Grade LOAD REGULATION F Grade LONG-TERM STABILITY NOISE VOLTAGE WIDEBAND NOISE DENSITY 1 Symbol Conditions Min Typ Max Unit VOUT IOUT = 0 mA, −40°C ≤ TA ≤ +125°C 2.4917 –0.332 2.500 2.5083 +0.332 V % ∆VOUT/∆VIN IOUT = 0 mA 30 100 ppm/V ∆VOUT/∆ILOAD ∆VOUT eN eN VS = 5.0 V, IOUT = 0 mA to 5 mA After 1000 hours of operation @ 125°C 0.1 Hz to 10 Hz At 1 kHz 30 50 8 480 100 ppm/mA ppm μV p-p nV/√Hz Typ Max Unit 5 15 ppm/°C Includes output voltage changes due to long-term drift and thermally induced output voltage hysteresis. VS = 3.0 V to 15 V, TA = −25°C to +85°C, unless otherwise noted. Table 3. Parameter TEMPERATURE COEFFICIENT F Grade LINE REGULATION F Grade LOAD REGULATION F Grade Symbol Conditions Min ∆VOUT/∆VIN IOUT = 0 mA 35 125 ppm/V ∆VOUT/∆ILOAD VS = 5.0 V, IOUT = 0 mA to 5 mA 20 125 ppm/mA Typ Max Unit 5 20 ppm/°C VS = 3.0 V to 15 V, TA = −40°C to +125°C, unless otherwise noted. Table 4. Parameter TEMPERATURE COEFFICIENT F Grade LINE REGULATION F Grade LOAD REGULATION F Grade SUPPLY CURRENT Symbol OUTPUT VOLTAGE HYSTERESIS VOUT-HYS Conditions Min ∆VOUT/∆VIN IOUT = 0 mA 40 200 ppm/V ∆VOUT/∆ILOAD IS VS = 5.0 V, IOUT = 0 mA to 5 mA TA = 25°C −40°C ≤ TA ≤ +125°C 8-lead SOIC 20 9 12 50 200 12 15 ppm/mA μA μA ppm Rev. 0 | Page 3 of 8 ADR291W ABSOLUTE MAXIMUM RATINGS Remove power before inserting or removing units from their sockets. Table 6. Package Type Package Type 8-Lead SOIC_N (R) Table 5. Parameter Supply Voltage Output Short-Circuit Duration to GND Storage Temperature Range R Package Operating Temperature Range ADR291WFRZ Junction Temperature Range R Package Lead Temperature (Soldering, 60 sec) Rating 18 V Indefinite 1 −65°C to +150°C θJA1 158 θJC 43 Unit °C/W θJA is specified for worst-case conditions. For example, θJA is specified for a device in socket testing. In practice, θJA is specified for a device soldered in the circuit board. ESD CAUTION −40°C to +125°C −65°C to +125°C 300°C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Rev. 0 | Page 4 of 8 ADR291W PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 8 ADR291 NC NC TOP VIEW NC 3 (Not to Scale) 6 VOUT 5 NC GND 4 7 NC = NO CONNECT 08554-002 NC 1 VIN 2 Figure 2. Pin Configuration Table 7. Pin Function Descriptions Pin No. 1, 3, 5, 7, 8 2 4 6 Mnemonic NC VIN GND VOUT Description No Connect Input Voltage Ground Output Voltage Rev. 0 | Page 5 of 8 ADR291W TERMINOLOGY Line Regulation Line regulation refers to the change in output voltage due to a specified change in input voltage. It includes the effects of selfheating. Line regulation is expressed as percent per volt, parts per million per volt, or microvolts per volt change in input voltage. Temperature Coefficient Temperature coefficient is the change of output voltage over the operating temperature change, normalized by the output voltage at 25°C, expressed in ppm/°C. The equation follows: Load Regulation where: VOUT (25°C) = VOUT at 25°C. VOUT (T1) = VOUT at Temperature 1. VOUT (T2) = VOUT at Temperature 2. The change in output voltage is due to a specified change in load current and includes the effects of self-heating. Load regulation is expressed in microvolts per milliampere, parts per million per milliampere, or ohms of dc output resistance. Long-Term Stability Long-term stability refers to the typical shift of output voltage at 25°C on a sample of parts subjected to a test of 1000 hours at 125°C. VOUT  VOUT t 0   VOUT t 1  VOUT ppm   VOUT t 0   VOUT t 1  VOUT t 0   10 6 where: VOUT (t0) = VOUT at 25°C at Time 0. VOUT (t1) = VOUT at 25°C after 1000 hours of operation at 125°C. TCVO ppm/  C   VOUT T2   VOUT T1  VOUT 25 C   T2  T1   10 6 NC = No Connect There are internal connections at NC pins that are reserved for manufacturing purposes. Users should not connect anything at the NC pins. Thermally Induced Output Voltage Hysteresis Thermally induced output voltage hysteresis is defined as the change of output voltage after the device is cycled through temperatures from +25°C to −40°C, then to +85°C, and back to +25°C. This is a typical value from a sample of parts put through such a cycle. VOUT HYS  VOUT (25 C)  VOUT_TC VΟUT HYS [ppm]  VOUT (25C )  VOUT_TC VOUT (25 C)  10 6 where: VOUT (25°C) = VOUT at 25°C. VOUT–TC = VOUT at 25°C after temperature cycle from +25°C to −40°C, then to +85°C, and back to +25°C. Rev. 0 | Page 6 of 8 ADR291W OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890) 1 5 6.20 (0.2441) 5.80 (0.2284) 4 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.10 SEATING PLANE 0.50 (0.0196) 0.25 (0.0099) 1.75 (0.0688) 1.35 (0.0532) 0.51 (0.0201) 0.31 (0.0122) 45° 8° 0° 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) COMPLIANT TO JEDEC STANDARDS MS-012-AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. 012407-A 8 4.00 (0.1574) 3.80 (0.1497) Figure 3. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) ORDERING GUIDE Model1 ADR291WFRZ-RL ADR291WFRZ-R7 1 Output Voltage 2.50 2.50 Initial Accuracy (±%) 0.12 0.12 Temperature Coefficient Max (ppm/°C) 15 15 Z = RoHS Compliant Part. Rev. 0 | Page 7 of 8 Temperature Range −40°C to +125°C −40°C to +125°C Package Description 8-Lead SOIC_N 8-Lead SOIC_N Package Option R-8 R-8 Ordering Quantity 2,500 1,000 ADR291W NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08554-0-3/10(0) Rev. 0 | Page 8 of 8