ADR318 Precision Low Drift SOT-23 Voltage Reference with Shutdown Data Sheet (Rev. A)
Document overview
- Manufacturer or author: Analog Devices, Inc.
- PDF pages: 12
Technical content
Precision Low Drift SOT-23 Voltage Reference with Shutdown ADR318 Rev. A 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. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. FEATURES PIN CONFIGURATION 1SHDN 5 GND 2VIN 3VOUT(SENSE) 4 VOUT(FORCE) ADR318 TOP VIEW (Not to Scale) 03431-001 Initial accuracy: ±5 mV maximum, ±0.27% maximum Low temperature coefficient: 25 ppm/°C maximum Load regulation: 100 ppm/mA Line regulation: 25 ppm/V Low supply headroom: 0.6 V Figure 1. 5-Lead SOT-23 Wide operating range: (VOUT + 0.6 V) to 15 V
APPLICATIONS
Battery-powered instrumentation Portable medical instruments Data acquisition systems Industrial process control systems Fault protection critical systems GENERAL DESCRIPTION The ADR318 is a precision 1.8 V band gap voltage reference fea turing high accuracy, high stability, and low power consumption in a tiny footprint. Patented temperature drift curvature correction techniques minimize nonlinearity of the voltage change with temperature. The wide operating range and low power consumption with additional shutdown capability make the part ideal for battery-powered applications. The V OUT (SENSE) pin enables greater accuracy by supporting full Kelvin operation in PCBs employing thin or long traces. The ADR318 is a low dropout voltage (LDV) device that prov ides a stable output voltage from supplies as low as 600 mV above the output voltage. This device is specified over the industrial operating range of 0°C to 70°C, and is available in a tiny 5-lead SOT-23 package. The combination of VOUT (SENSE) and shutdown functions also enables a number of unique applications, combining precision reference/regulation with fault decision and overcurrent protection. See the Applications section for details.
Rev. A | Page 2 of 12 TABLE OF CONTENTS Precision Negative Voltage Reference Without Precision
REVISION HISTORY
10/06—Rev. 0 to Rev. A 1/03—Revision 0: Initial Version
Rev. A | Page 3 of 12 SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
TA = TMIN to TMAX, VIN = 5 V , unless otherwise noted1. Table 1. Parameter Symbol Conditions Min Typ Max Unit Initial Accuracy VO 1.795 1.8 1.802 V Initial Accuracy Error VOERR −0.27 +0.27 % Temperature Coefficient TCVO 0°C to 70°C 5 25 ppm/°C Minimum Supply Voltage Headroom VIN – VOUT 600 mV Line Regulation ΔVOUT/ΔVIN VIN = 2.5 V to 15 V, 10 25 ppm/V 0°C < TA < 70°C Load Regulation ΔVOUT/ΔILOAD VIN = 3 V, ILOAD = 0 mA to 5 mA, 0°C < TA < 70°C 100 ppm/mA Quiescent Current ISY No load 100 120 μA 0°C < TA < 70°C 140 μA Voltage Noise eN 0.1 Hz to 10 Hz 5 μV p-p Turn-On Settling Time tR 20 μs Long-Term Stability2 ΔVOUT 50 ppm/1000 hours Output Voltage Hysteresis VO_HYS 40 ppm Ripple Rejection Ratio RRR fIN = 60 Hz 85 dB Short Circuit to Ground ISC VIN = 5.0 V 25 mA VIN = 15.0 V 30 mA Shutdown Supply Current ISHDN 3 μA Shutdown Logic Input Current ILOGIC 500 nA Shutdown Logic Low VINL 0.8 V Shutdown Logic High VINH 2.4 V 1 TMIN = 0°C, TMAX = 70°C. 2 The long-term stability specification is noncumulative. The drift in subsequent 1000-hour periods is significantly lower than in the first 1000-hour period.
At 25°C, unless otherwise noted. soldered in a circuit board for surface-mount packages. Table 3. Thermal Resistance
Rev. A | Page 8 of 12 TERMINOLOGY Temperature Coefficient Temperature coefficient is the change of output voltage with respect to operating temperature changes, normalized by the output voltage at 25°C. This parameter is expressed in ppm/°C, and can be determined with the following equation: () () () () 610C 25C ppm ×− × ° −=⎥⎦ ° 1 2O 1O2O O T TV T V T VTCV (1) where: VO(25°C) = VO at 25°C. VO(T1) = VO at Temperature 1. VO(T2) = VO at Temperature 2. Long-T erm Stability Long-term stability is the typical shift of output voltage at 25°C on a sample of parts subjected to a test of 1000 hours at 25°C. ΔVO = VO(t0) − VO(t1) [] () () 610ppm ×−=Δ 1O0O O t V t V t VV (2) where: VO(t0) = VO at 25°C at Time 0. VO(t1) = VO at 25°C after 1000 hours of operation at 25°C. Thermal Hysteresis Thermal hysteresis is the change of output voltage after the device is cycled through temperature from +25°C to −40°C to +125°C and back to +25°C. This is a typical value from a sample of parts put through such a cycle. VO_HYS = VO(25°C) − VO_TC [] ( ) _ 10C 25 C 25ppm ×° − °= O TC OO HYS O V VVV (3) where: VO(25°C) = VO at 25°C. VO_TC = VO at 25°C after temperature cycle at +25°C to −40°C to +125°C and back to +25°C.
Rev. A | Page 12 of 12 OUTLINE DIMENSIONS PIN 1 1.60 BSC 2.80 BSC 1.90 BSC
0.95 BSC
0.22 0.08 10° 0.50 0.30
0.15 MAX SEATING
1.45 MAX
1.30 1.15 0.90
2.90 BSC
0.60 0.45 0.30 COMPLIANT TO JEDEC STANDARDS MO-178-AA Figure 23. 5-Lead Small Outline Transistor Package [SOT-23]
Description
ADR318ARJ-R2 0°C to 70°C 5-Lead SOT-23 RJ-5 REA 1.800 V 250 ADR318ARJ-REEL 0°C to 70°C 5-Lead SOT-23 RJ-5 REA 1.800 V 10,000 ADR318ARJ-REEL7 0°C to 70°C 5-Lead SOT-23 RJ-5 REA 1.800 V 3,000 ADR318ARJZ-REEL71 0°C to 70°C 5-Lead SOT-23 RJ-5 L28 1.800 V 3,000 1 Z = Pb-free part. ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C03431-0-10/06(A)