ADR291

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8-Lead Narrow Body SO (SO Suffix) VOUT VIN GND NC NC NC NC NCADR29x TOP VIEW (Not to Scale) NC = NO CONNECT 8-Lead TSSOP (RU Suffix) VOUT VIN GND NC NC NC NC NCADR29x TOP VIEW (Not to Scale) NC = NO CONNECT REV.B 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a Low Noise Micropower 2.048 V, 2.5 V, and 4.096 V Precision Voltage References ADR290/ADR291/ADR292 Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2001

FEATURES

2.35 V to 15 V, ADR290

2.8 V to 15 V, ADR291

4.4 V to 15 V, ADR292

Supply Current 12 /H9262A Max Low-Noise 6 /H9262V, 8 /H9262V, 12 /H9262V p-p (0.1 Hz–10 Hz) High Output Current 5 mA Temperature Range /H1154640/H11543C to /H11545125/H11543C Pin Compatible with REF02/REF19x

APPLICATIONS

Precision Reference for 3 V and 5 V Systems A/D and D/A Converter Reference Solar-Powered Applications Loop-Current-Powered Instruments GENERAL DESCRIPTION The ADR290, ADR291 and ADR292 are low noise, micro- power precision voltage references that use an XFET® reference circuit. The new XFET architecture offers significant perfor- mance improvements over traditional bandgap and Buried Zener-based references. Improvements include: one quarter the voltage noise output of bandgap references operating at the same current, very low and ultralinear temperature drift, low thermal hysteresis and excellent long-term stability. The ADR29x family are series voltage references providing stable and accurate output voltages from supplies as low as 2.35 V for the ADR290. Output voltage options are 2.048 V, 2.5 V, and 4.096 V for the ADR290, ADR291, and ADR292 respectively. Quiescent XFET is a registered trademark of Analog Devices, Inc. current is only 12 µA, making these devices ideal for battery- powered instrumentation. Three electrical grades are available offering initial output accuracies of ± 2 mV, ± 3 mV and ± 6 mV max for the ADR290 and ADR291, and ± 3 mV, ± 4 mV and ± 6 mV max for the ADR292. Temperature coefficients for the three grades are 8 ppm/ °C, 15 ppm/ °C, and 25 ppm/ °C max, respectively. Line regulation and load regulation are typically 30 ppm/V and 30 ppm/mA, maintaining the reference’s overall high performance. For a device with 5.0 V output, refer to the ADR293 data sheet. The ADR290, ADR291, and ADR292 references are specified over the extended industrial temperature range of –40 °C to +125°C. Devices are available in the 8-lead SOIC and 8-lead TSSOP packages. ADR29x Product Output Voltage Initial Accuracy Temperature Coefficient Part Number (V) (%) (ppm/ /H11543C) Max ADR290 2.048 0.10, 0.15, 0.29 8, 15, 25 ADR291 2.500 0.08, 0.12, 0.24 8, 15, 25 ADR292 4.096 0.07, 0.10, 0.15 8, 15, 25 ADR293 5.000 (See ADR293 Data Sheet)

REV. B ADR290/ADR291/ADR292 –2– ADR290–SPECIFICATIONS ELECTRICAL SPECIFICATIONS Parameter Symbol Conditions Min Typ Max Unit E GRADE Output Voltage V O IOUT = 0 mA 2.046 2.048 2.050 V Initial Accuracy V OERR –2 +2 mV –0.10 +0.10 % F GRADE Output Voltage V O IOUT = 0 mA 2.045 2.048 2.051 V Initial Accuracy V OERR –3 +3 mV –0.15 +0.15 % G GRADE Output Voltage V O IOUT = 0 mA 2.042 2.048 2.054 V Initial Accuracy V OERR –6 +6 mV –0.29 +0.29 % LINE REGULATION “E/F” Grades ∆VO/∆VIN 2.7 V to 15 V, IOUT = 0 mA 30 100 ppm/V “G” Grade 40 125 ppm/V LOAD REGULATION “E/F” Grades ∆VO/∆ILOAD VS = 5.0 V, 0 mA to 5 mA 30 100 ppm/mA “G” Grade 40 125 ppm/mA LONG-TERM STABILITY ∆VO After 1000 hrs of Operation @ 125°C 50 ppm NOISE VOLTAGE e N 0.1 Hz to 10 Hz 6 µV p-p WIDEBAND NOISE DENSITY e N @ 1 kHz 420 nV/ √Hz ELECTRICAL SPECIFICATIONS Parameter Symbol Conditions Min Typ Max Unit TEMPERATURE COEFFICIENT “E” Grade TCV O IOUT = 0 mA 3 8 ppm/ °C “F” Grade 6 15 ppm/ °C “G” Grade 10 25 ppm/ °C LINE REGULATION “E/F” Grades ∆VO/∆VIN 2.7 V to 15 V, IOUT = 0 mA 35 125 ppm/V “G” Grade 50 150 ppm/V LOAD REGULATION “E/F” Grades ∆VO/∆ILOAD VS = 5.0 V, 0 mA to 5 mA 20 125 ppm/mA “G” Grade 30 150 ppm/mA ELECTRICAL SPECIFICATIONS Parameter Symbol Conditions Min Typ Max Unit TEMPERATURE COEFFICIENT “E” Grade TCV O IOUT = 0 mA 3 10 ppm/ °C “F” Grade 5 20 ppm/ °C “G” Grade 10 30 ppm/ °C LINE REGULATION “E/F” Grades ∆VO/∆VIN 2.7 V to 15 V, IOUT = 0 mA 40 200 ppm/V “G” Grade 70 250 ppm/V LOAD REGULATION “E/F” Grades ∆VO/∆ILOAD VS = 5.0 V, 0 mA to 5 mA 20 200 ppm/mA “G” Grade 30 300 ppm/mA SUPPLY CURRENT I S TA = +25°C8 1 2 µA –40°C ≤ TA ≤ +125°C1 2 1 5 µA THERMAL HYSTERESIS V O–HYS SO-8, TSSOP-8 50 ppm Specifications subject to change without notice. (VS = 2.7 V, TA = +25/H11543C unless otherwise noted) (VS = 2.7 V, TA = /H1154640/H11543C ≤ TA ≤ +125/H11543C unless otherwise noted) (VS = 2.7 V, TA = –25 /H11543C ≤ TA ≤ +85/H11543C unless otherwise noted)

ADR291–SPECIFICATIONS ELECTRICAL SPECIFICATIONS Parameter Symbol Conditions Min Typ Max Unit E GRADE Output Voltage V O IOUT = 0 mA 2.498 2.500 2.502 V Initial Accuracy V OERR –2 +2 mV –0.08 +0.08 % F GRADE Output Voltage V O IOUT = 0 mA 2.497 2.500 2.503 V Initial Accuracy V OERR –3 +3 mV –0.12 +0.12 % G GRADE Output Voltage V O IOUT = 0 mA 2.494 2.500 2.506 V Initial Accuracy V OERR –6 +6 mV –0.24 +0.24 % LINE REGULATION “E/F” Grades ∆VO/∆VIN 3.0 V to 15 V, IOUT = 0 mA 30 100 ppm/V “G” Grade 40 125 ppm/V LOAD REGULATION “E/F“ Grades ∆VO/∆ILOAD VS = 5.0 V, 0 mA to 5 mA 30 100 ppm/mA “G“ Grade 40 125 ppm/mA LONG-TERM STABILITY ∆VO After 1000 hrs of Operation @ 125°C 50 ppm NOISE VOLTAGE e N 0.1 Hz to 10 Hz 8 µV p-p WIDEBAND NOISE DENSITY e N @ 1 kHz 480 nV/ √Hz ELECTRICAL SPECIFICATIONS Parameter Symbol Conditions Min Typ Max Unit TEMPERATURE COEFFICIENT “E” Grade TCV O IOUT = 0 mA 3 8 ppm/ °C “F” Grade 5 15 ppm/ °C “G” Grade 10 25 ppm/ °C LINE REGULATION “E/F” Grades ∆VO/∆VIN 3.0 V to 15 V, IOUT = 0 mA 35 125 ppm/V “G” Grade 50 150 ppm/V LOAD REGULATION “E/F” Grades ∆VO/∆ILOAD VS = 5.0 V, 0 mA to 5 mA 20 125 ppm/mA “G” Grade 30 150 ppm/mA ELECTRICAL SPECIFICATIONS Parameter Symbol Conditions Min Typ Max Unit TEMPERATURE COEFFICIENT “E” Grade TCV O IOUT = 0 mA 3 10 ppm/ °C “F” Grade 5 20 ppm/ °C “G” Grade 10 30 ppm/ °C LINE REGULATION “E/F” Grades ∆VO/∆VIN 3.0 V to 15 V, IOUT = 0 mA 40 200 ppm/V “G” Grade 70 250 ppm/V LOAD REGULATION “E/F” Grades ∆VO/∆ILOAD VS = 5.0 V, 0 mA to 5 mA 20 200 ppm/mA “G” Grade 30 300 ppm/mA SUPPLY CURRENT I S TA = +25°C9 1 2 µA –40°C ≤ TA ≤ +125°C1 2 1 5 µA THERMAL HYSTERESIS V O–HYS SO-8, TSSOP-8 50 ppm Specifications subject to change without notice. ADR290/ADR291/ADR292 REV. B –3– (VS = 3.0 V, TA = +25/H11543C unless otherwise noted) (VS = 3.0 V, TA = –40 /H11543C ≤ TA ≤ +125/H11543C unless otherwise noted) (VS = 3.0 V, TA = –25 /H11543C ≤ TA ≤ +85/H11543C unless otherwise noted)

REV. B ADR290/ADR291/ADR292 –4– ADR292–SPECIFICATIONS ELECTRICAL SPECIFICATIONS Parameter Symbol Conditions Min Typ Max Unit E GRADE Output Voltage V O IOUT = 0 mA 4.093 4.096 4.099 V Initial Accuracy V OERR –3 +3 mV –0.07 +0.07 % F GRADE Output Voltage V O IOUT = 0 mA 4.092 4.096 4.1 V Initial Accuracy V OERR –4 +4 mV –0.10 +0.10 % G GRADE Output Voltage V O IOUT = 0 mA 4.090 4.096 4.102 V Initial Accuracy V OERR –6 +6 mV –0.15 +0.15 % LINE REGULATION “E/F” Grades ∆VO/∆VIN 4.5 V to 15 V, IOUT = 0 mA 30 100 ppm/V “G” Grade 40 125 ppm/V LOAD REGULATION “E/F” Grades ∆VO/∆ILOAD VS = 5.0 V, 0 mA to 5 mA 30 100 ppm/mA “G” Grade 40 125 ppm/mA LONG-TERM STABILITY ∆VO After 1000 hrs of Operation @ 125°C 50 ppm NOISE VOLTAGE e N 0.1 Hz to 10 Hz 12 µV p-p WIDEBAND NOISE DENSITY e N @ 1 kHz 640 nV/ √Hz ELECTRICAL SPECIFICATIONS Parameter Symbol Conditions Min Typ Max Unit TEMPERATURE COEFFICIENT “E” Grade TCV O IOUT = 0 mA 3 8 ppm/ °C “F” Grade 5 15 ppm/ °C “G” Grade 10 25 ppm/ °C LINE REGULATION “E/F” Grades ∆VO/∆VIN 4.5 V to 15 V, IOUT = 0 mA 35 125 ppm/V “G” Grade 50 150 ppm/V LOAD REGULATION “E/F” Grades ∆VO/∆ILOAD VS = 5.0 V, 0 mA to 5 mA 20 125 ppm/mA “G” Grade 30 150 ppm/mA ELECTRICAL SPECIFICATIONS Parameter Symbol Conditions Min Typ Max Unit TEMPERATURE COEFFICIENT “E” Grade TCV O IOUT = 0 mA 3 10 ppm/ °C “F” Grade 5 20 ppm/ °C “G” Grade 10 30 ppm/ °C LINE REGULATION “E/F” Grades ∆VO/∆VIN 4.5 V to 15 V, IOUT = 0 mA 40 200 ppm/V “G” Grade 70 250 ppm/V LOAD REGULATION “E/F” Grades ∆VO/∆ILOAD VS = 5.0 V, 0 mA to 5 mA 20 200 ppm/mA “G” Grade 30 300 ppm/mA SUPPLY CURRENT I S TA = +25°C1 0 1 5 µA –40°C ≤ TA ≤ +125°C1 2 1 8 µA THERMAL HYSTERESIS V O–HYS SO-8, TSSOP-8 50 ppm Specifications subject to change without notice. (VS = 5 V, TA = +25/H11543C unless otherwise noted) (VS = 5 V, TA = –40 /H11543C ≤ TA ≤ +125/H11543C unless otherwise noted) (VS = 5 V, TA = –25 /H11543C ≤ TA ≤ +85/H11543C unless otherwise noted)

REV. B –5– ABSOLUTE MAXIMUM RATINGS Storage Temperature Range Operating Temperature Range Junction Temperature Range NOTES 1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation at or above this specification is not implied. Exposure to the above maximum rating conditions for extended periods may affect device reliability. 2. Remove power before inserting or removing units from their sockets. Package Type /H9258JA* /H9258JC Unit 8-Lead SOIC (SO) 158 43 °C/W 8-Lead TSSOP (RU) 240 43 °C/W *θJA is specified for worst-case conditions, i.e., θJA is specified for device in socket testing. In practice, θJA is specified for a device soldered in the circuit board. CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADR290/ADR291/ADR292 features proprietary ESD protection circuitry, perma- nent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. WARNING! ESD SENSITIVE DEVICE ORDERING GUIDE Temperature Number of Output Initial Coefficient Package Package Parts per Model Voltage Accuracy (%) Max (ppm/ /H11543C) Description Option Package ADR290 ER, ER-REEL7, ER-REEL 2.048 0.10 8 SOIC SO-8 98, 1000, 2500 FR, FR-REEL7, FR-REEL 2.048 0.15 15 SOIC SO-8 98, 1000, 2500 GR, GR-REEL7, GR-REEL 2.048 0.29 25 SOIC SO-8 98, 1000, 2500 GRU-REEL7, GRU-REEL 2.048 0.29 25 TSSOP RU-8 1000, 2500 ADR291 ER, ER-REEL7, ER-REEL 2.50 0.08 8 SOIC SO-8 98, 1000, 2500 FR, FR-REEL7, FR-REEL 2.50 0.12 15 SOIC SO-8 98, 1000, 2500 GR, GR-REEL7, GR-REEL 2.50 0.24 25 SOIC SO-8 98, 1000, 2500 GRU-REEL7, GRU-REEL 2.50 0.24 25 TSSOP RU-8 1000, 2500 ADR292 ER, ER-REEL7, ER-REEL 4.096 0.07 8 SOIC SO-8 98, 1000, 2500 FR, FR-REEL7, FR-REEL 4.096 0.10 15 SOIC SO-8 98, 1000, 2500 GR, GR-REEL7, GR-REEL 4.096 0.15 25 SOIC SO-8 98, 1000, 2500 GRU-REEL7, GRU-REEL 4.096 0.15 25 TSSOP RU-8 1000, 2500 See ADR293 data sheet for ordering guide. OTHER XFET PRODUCTS Part Nominal Output Package Number Voltage (V) Type ADR420 2.048 8-Lead_ µSOIC/SOIC ADR421 2.50 8-Lead_ µSOIC/SOIC

REV. B ADR290/ADR291/ADR292 –6– PARAMETER DEFINITION Line Regulation The change in output voltage due to a specified change in input voltage. It includes the effects of self-heating. Line regulation is expressed in either percent-per-volt, parts-per-mil lion-per- volt, or microvolts-per-volt change in input voltage. Load Regulation The change in output voltage due to a specified change in load current. It includes the effects of self-heating. Load regulation is expressed in either microvolts-per-milliampere, parts-per- million-per-milliampere, or ohms of dc output resistance. Long-Term Stability Typical shift of output voltage at 25 °C on a sample of parts subjected to high-temperature operating life test of 1000 hours at 125 °C. VV tV t V ppm Vt Vt Vt OO O OO O () – () = () – () 0O 1 [] 1 0 6 Where VO (t0 ) = VO at 25°C at time 0 VO (t1 ) = VO at 25°C after 1000 hours operation at 125 °C Temperature Coefficient The change of output voltage over the operating temperature change and normalized by the output voltage at 25°C, expressed in ppm/°C. The equation follows: TCV ppm C VT VT VC T T O OO O [/ ] () – () () ( – )°= °× ×21 25 10 Where VO (25°C) = VO at 25°C VO(T1 ) = VO at Temperature 1 VO(T2 ) = VO at Temperature 2 NC = No Connect (There are in fact internal connections at NC pins which are reserved for manufacturing purposes. Users should not connect anything at NC pins.) Thermal Hysteresis Thermal hysteresis is defined as the change of output voltage af- ter the device is cycled through temperature from +25 °C to –40°C to +85°C and back to +25°C. This is a typical value from a sample of parts put through such a cycle. VV C V V ppm VC V VC O HYS O O TC O HYS OO T C O – _ () – [] () – = ° ° × 25 106 Where VO (25°C) = VO at 25°C VO–TC = VO at 25°C after temperature cycle at +25 °C to –40°C to +85°C and back to +25°C

TEMPERATURE – /H11543C 2.054 2.042 –50 125 –25 OUTPUT VOLTAGE – V 02 5 5 0 7 5 1 0 0 2.052 2.050 2.048 2.046 2.044 VS = 5V 3 TYPICAL PARTS TPC 1. ADR290 VOUT vs. Temperature TEMPERATURE – /H11543C 2.506 2.494 –50 125 –25 OUTPUT VOLTAGE – V 02 5 5 0 7 5 1 0 0 2.504 2.502 2.500 2.498 2.496 VS = 5V 3 TYPICAL PARTS TPC 2. ADR291 VOUT vs. Temperature TEMPERATURE – /H11543C 4.102 4.090 –50 125 –25 OUTPUT VOLTAGE – V 02 5 5 0 7 5 1 0 0 4.100 4.098 4.096 4.094 4.092 VS = 5V 3 TYPICAL PARTS TPC 3. ADR292 VOUT vs. Temperature INPUT VOLTAGE – V 01 6 2 QUIESCENT CURRENT – /H9262A 46 8 1 0 1 2 1 4 TA = +125/H11543C TA = +25/H11543C TA = –40/H11543C TPC 4. ADR290 Quiescent Current vs. Input Voltage INPUT VOLTAGE – V 01 6 2 QUIESCENT CURRENT – /H9262A 46 8 1 0 1 2 1 4 TA = +125/H11543C TA = +25/H11543C TA = –40/H11543C TPC 5. ADR291 Quiescent Current vs. Input Voltage INPUT VOLTAGE – V 01 6 2 QUIESCENT CURRENT – /H9262A 46 8 1 0 1 2 1 4 TA = +125/H11543C TA = +25/H11543C TA = –40/H11543C TPC 6. ADR292 Quiescent Current vs. Input Voltage Typical Performance Characteristic– ADR290/ADR291/ADR292 REV. B –7–

REV. B ADR290/ADR291/ADR292 –8– TEMPERATURE – /H11543C –50 125 –25 SUPPLY CURRENT – /H9262A 0 2 55 07 5 1 0 0 VS = 5V ADR290 ADR291ADR292 TPC 7. ADR290/ADR291/ADR292 Supply Current vs. Temperature TEMPERATURE – /H11543C 100 –50 125 –25 LINE REGULATION – ppm/V 0 2 55 07 5 1 0 0 ADR290: VS = 2.7V TO 15V ADR291: VS = 3.0V TO 15V ADR292: VS = 4.5V TO 15V ADR290 ADR292 ADR291 IOUT = 0mA TPC 8. ADR290/ADR291/ADR292 Line Regulation vs. Temperature TEMPERATURE – /H11543C 100 –50 125 –25 LINE REGULATION – ppm/V 0 2 55 07 5 1 0 0 ADR290: VS = 2.7V TO 7.0V ADR291: VS = 3.0V TO 7.0V ADR292: VS = 4.5V TO 9.0V ADR292 ADR290 IOUT = 0mA ADR291 TPC 9. ADR290/ADR291/ADR292 Line Regulation vs. Temperature LOAD CURRENT – mA 0.7 0 5.0 0.5 DIFFERENTIAL VOLTAGE – V 0.6 0.5 0.4 0.3 0.2 0.1 TA = +25/H11543C TA = –40/H11543C TA = +125/H11543C TPC 10. ADR290 Minimum Input-Output Voltage Differential vs. Load Current LOAD CURRENT – mA DIFFERENTIAL VOLTAGE – V 0.7 0.6 0.5 0.4 0.3 0.2 0.1 TA = +25/H11543C TA = –40/H11543C TA = +125/H11543C TPC 11. ADR291 Minimum Input-Output Voltage Differential vs. Load Current LOAD CURRENT – mA 0.7 0 5.0 0.5 DIFFERENTIAL VOLTAGE – V 0.6 0.5 0.4 0.3 0.2 0.1 TA = +25/H11543C TA = –40/H11543C TA = +125/H11543C TPC 12. ADR292 Minimum Input-Output Voltage Differential vs. Load Current

REV. B –9– TEMPERATURE – /H11543C 200 160 –50 125 –25 LINE REGULATION – ppm/mA 0 2 55 07 5 1 0 0 120 IOUT = 1mA IOUT = 5mA VS = 5V TPC 13. ADR290 Line Regulation vs. Temperature TEMPERATURE – /H11543C 200 160 –50 125 –25 LOAD REGULATION – ppm/mA 0 2 55 07 5 1 0 0 120 VS = 5V IOUT = 1mA IOUT = 5mA TPC 14. ADR291 Load Regulation vs. Temperature TEMPERATURE – /H11543C 200 160 –50 125 –25 LOAD REGULATION – ppm/mA 0 2 55 07 5 1 0 0 120 VS = 5V IOUT = 1mA IOUT = 5mA TPC 15. ADR292 Load Regulation vs. Temperature SOURCING LOAD CURRENT – mA 500 –250 –1000 0.1 10 1 /H9004 VOUT FROM NOMINAL – /H9262V –750 –500 250 TA = +25/H11543C TA = +125/H11543C TA = –40/H11543C TPC 16. ADR290 ∆VOUT from Nominal vs. Load Current SOURCING LOAD CURRENT – mA –1250 –2000 0.1 10 1 /H9004 VOUT FROM NOMINAL – /H9262V –1750 –1500 –500 –250 TA = +25/H11543C TA = +125/H11543CTA = –40/H11543C –1000 –750 TPC 17. ADR291 ∆VOUT from Nominal vs. Load Current SOURCING LOAD CURRENT – mA –2500 –4000 0.1 10 1 /H9004 VOUT FROM NOMINAL – /H9262V –3500 –3000 –1000 –500 TA = +25/H11543C TA = +125/H11543C TA = –40/H11543C –2000 –1500 TPC 18. ADR292 ∆VOUT from Nominal vs. Load Current

REV. B ADR290/ADR291/ADR292 –10– FREQUENCY – Hz 1000 500 10 1000 100 VOLTAGE NOISE DENSITY – nV//H20906Hz 100 200 800 900 300 400 600 700 ADR290 ADR292 VIN = 15V TA = 25/H11543C ADR291 TPC 19. Voltage Noise Density vs. Frequency FREQUENCY – Hz 120 10 1000 100 RIPPLE REJECTION – dB 100 VS = 5V TPC 20. ADR290/ADR291/ADR292 Ripple Rejection vs. Frequency 100 2/H9262V p-p TPC 21. ADR290 0.1 Hz to 10 Hz Noise FREQUENCY – Hz 0 10k 10 OUTPUT IMPEDANCE – /H9024 100 1k VS = 5V IL = 0 mA TPC 22. ADR290 Output Impedance vs. Frequency FREQUENCY – Hz 0 10k 10 OUTPUT IMPEDANCE – /H9024 100 1k VS = 5V IL = 0 mA TPC 23. ADR291 Output Impedance vs. Frequency FREQUENCY – Hz 0 10k 10 OUTPUT IMPEDANCE – /H9024 100 1k VS = 5V IL = 0 mA TPC 24. ADR292 Output Impedance vs. Frequency

REV. B –11– 100 1msIL = 5mA OFF ON TPC 25. ADR291 Load Transient 100 1msIL = 5mA CL = 1nF OFF ON TPC 26. ADR291 Load Transient 100 5msIL = 5mA CL = 100nF OFF ON TPC 27. ADR291 Load Transient 100 500/H9262sIL = 5mA TPC 28. ADR291 Turn-On Time 100 10msIL = 0mA TPC 29. ADR291 Turn-Off Time VOUT DEVIA TION – ppm –200 FREQUENCY –180 –160 –140 –120 –100 –80 –60 –40 –20 100 120 140 160 180 200 MORE TEMPERA TURE +25/H11543C –40/H11543C 85/H11543C +25/H11543C TPC 30. Typical Hysteresis for the ADR291 Product

REV. B –15– 8-Lead Narrow Body SO (SO Suffix) 0.0098 (0.25) 0.0075 (0.19) 0.0500 (1.27) 0.0160 (0.41) 8/H11543 0/H11543 0.0196 (0.50) 0.0099 (0.25) /H11547 45/H11543 0.1968 (5.00) 0.1890 (4.80) 0.2440 (6.20) 0.2284 (5.80) PIN 1 0.1574 (4.00) 0.1497 (3.80) 0.0500 (1.27) BSC 0.0688 (1.75) 0.0532 (1.35) SEATING PLANE 0.0098 (0.25) 0.0040 (0.10) 0.0192 (0.49) 0.0138 (0.35)8-Lead TSSOP (RU Suffix) 8 5 0.256 (6.50) 0.246 (6.25) 0.177 (4.50) 0.169 (4.30)PIN 1 0.0256 (0.65) BSC 0.122 (3.10) 0.114 (2.90) SEATING PLANE 0.006 (0.15) 0.002 (0.05) 0.0118 (0.30) 0.0075 (0.19) 0.0433 (1.10) MAX 0.0079 (0.20) 0.0035 (0.090) 0.028 (0.70) 0.020 (0.50) 8/H11543 0/H11543 OUTLINE DIMENSIONS Dimensions shown in inches and (mm). C00163–0–3/01 (B) PRINTED IN U.S.A.