ADR425 Analog Devices, ADR425 Datasheet
ADR425
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ADR425 Summary of contents
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... Line regulation: 35 ppm/V Low hysteresis: 40 ppm typical Wide operating range ADR420 ADR421: 4 ADR423 ADR425 Quiescent current: 0.5 mA maximum High output current Wide temperature range: −40°C to +125°C APPLICATIONS Precision data acquisition systems ...
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... Enhancement to Figure 13 ............................................................ 15 Updated Outline Dimensions....................................................... 16 3/02—Rev Rev. B Edits to Ordering Guide ...................................................................4 Deletion of Precision Voltage Regulator section........................ 15 Addition of Precision Boosted Output Regulator section ....... 15 Addition of Figure 13..................................................................... 15 10/01—Rev Rev. A Addition of ADR423 and ADR425 to ADR420/ADR421...............................................................Universal 5/01—Revision 0: Initial Version Rev Page ...
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... IN −40°C < T < +125° p-p 0 kHz ∆V 1000 hours OUT V OUT_HYS RRR kHz Rev Page ADR420/ADR421/ADR423/ADR425 Min Typ Max 2.045 2.048 2.051 2.047 2.048 2.049 −3 +3 −0.15 +0.15 −1 +1 −0.05 +0. ...
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... ADR420/ADR421/ADR423/ADR425 ADR421 ELECTRICAL SPECIFICATIONS 25°C, unless otherwise noted Table 3. Parameter OUTPUT VOLTAGE A Grade B Grade INITIAL ACCURACY A Grade B Grade TEMPERATURE COEFFICIENT A Grade B Grade SUPPLY VOLTAGE HEADROOM LINE REGULATION LOAD REGULATION QUIESCENT CURRENT VOLTAGE NOISE VOLTAGE NOISE DENSITY TURN-ON SETTLING TIME ...
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... IN −40°C < T < +125° p-p 0 kHz ∆V 1000 hours OUT V OUT_HYS RRR kHz Rev Page ADR420/ADR421/ADR423/ADR425 Min Typ Max 2.996 3.000 3.004 2.9985 3.000 3.0015 −4 +4 −0.13 +0.13 −1.5 +1.5 −0.04 +0. ...
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... ADR420/ADR421/ADR423/ADR425 ADR425 ELECTRICAL SPECIFICATIONS 25°C, unless otherwise noted Table 5. Parameter OUTPUT VOLTAGE A Grade B Grade INITIAL ACCURACY A Grade B Grade TEMPERATURE COEFFICIENT A Grade B Grade SUPPLY VOLTAGE HEADROOM LINE REGULATION LOAD REGULATION QUIESCENT CURRENT VOLTAGE NOISE VOLTAGE NOISE DENSITY TURN-ON SETTLING TIME ...
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... Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ADR420/ADR421/ADR423/ADR425 THERMAL RESISTANCE θ is specified for the worst-case conditions, that is, θ JA ...
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... Trim Terminal. It can be used to adjust the output voltage over a ±0.5% range without affecting the temperature coefficient Output Voltage. OUT TP ADR420 ADR421/ V NIC ADR423/ ADR425 V 6 NIC 3 OUT TOP VIEW GND TRIM (Not to Scale NIC = NO INTERNAL CONNECTION TP = TEST PIN (DO NOT CONNECT) Figure 2. 8-Lead SOIC, 8-Lead MSOP Pin Configuration Rev Page ...
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... TEMPERATURE (°C) Figure 5. ADR423 Typical Output Voltage vs. Temperature 5.0025 5.0023 5.0021 5.0019 5.0017 5.0015 5.0013 5.0011 5.0009 5.0007 5.0005 80 110 125 –40 Figure 6. ADR425 Typical Output Voltage vs. Temperature 0.55 0.50 0.45 0.40 0.35 0.30 0.25 80 110 125 4 0.55 0.50 0.45 0.40 0.35 0.30 0.25 80 110 125 4 Rev Page ADR420/ADR421/ADR423/ADR425 – ...
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... ADR420/ADR421/ADR423/ADR425 0.55 0.50 0.45 0.40 0.35 0.30 0. INPUT VOLTAGE (V) Figure 9. ADR423 Supply Current vs. Input Voltage 0.55 0.50 0.45 0.40 0.35 0.30 0. INPUT VOLTAGE (V) Figure 10. ADR425 Supply Current vs. Input Voltage 0mA TO 5mA 4. –40 – TEMPERATURE (°C) Figure 11. ADR420 Load Regulation vs. Temperature +125°C +25° ...
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... TEMPERATURE (°C) Figure 17. ADR423 Line Regulation vs. Temperature ADR420/ADR421/ADR423/ADR425 7.5V TO 15V 110 125 –40 Figure 18. ADR425 Line Regulation vs. Temperature 2.5 2.0 –40°C +25°C 1.5 +85°C 1.0 0.5 0 110 125 0 Figure 19. ADR420 Minimum Input/Output Voltage 2.5 2.0 –40°C +25°C 1.5 +125°C 1.0 ...
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... Figure 21. ADR423 Minimum Input/Output Voltage Differential vs. Load Current 2.5 2.0 –40°C +25°C 1.5 +125°C 1.0 0 LOAD CURRENT (mA) Figure 22. ADR425 Minimum Input/Output Voltage Differential vs. Load Current 30 TEMPERATURE +25°C –40°C +125°C +25° DEVIATION (ppm) Figure 23. ADR421 Typical Hysteresis ...
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... TIME (100µs/DIV) Figure 28. ADR421 Line Transient Response, C BYPASS C = 0µF 1mA LOAD L V OUT LOAD OFF LOAD ON TIME (100µs/DIV) Figure 29. ADR421 Load Transient Response ADR420/ADR421/ADR423/ADR425 C = 100nF L V OUT LOAD ON Figure 30. ADR421 Load Transient Response, C BYPASS C = 0.01µ LOAD = 0.1 μ ...
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... Rev Page ADR425 ADR423 ADR421 ADR420 100 1k 10k FREQUENCY (Hz) Figure 36. Output Impedance vs. Frequency 100 1k 10k 100k FREQUENCY (Hz) Figure 37. Ripple Rejection vs. Frequency 100k 1M ...
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... A capacitor here acts as a source of stored energy for 10 sudden increase in load current. The only parameter that degrades by adding an output capacitor is the turn-on time, which depends on the size of the selected capacitor. Rev Page ADR420/ADR421/ADR423/ADR425 ( ) = ° − ...
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... Figure 31 to Figure 35 show the turn-on settling time for the ADR421. Rev Page GND. The circuit in Figure 39 OUT TP ADR420 ADR421/ NIC 2 7 ADR423/ OUTPUT 0.1µF ADR425 6 NIC 3 0.1µF TOP VIEW TRIM 4 (Not to Scale) 5 NIC = NO INTERNAL CONNECTION TP = TEST PIN (DO NOT CONNECT) (2) ...
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... LASER BEAM ACTIVATOR RIGHT MEMS MIRROR ACTIVATOR LEFT AMPL PREAMP AMPL DAC ADC DAC DSP Figure 41. All Optical Router Network + ADR420/ ADR421/ ADR423/ ADR425 V 6 OUT GND 4 –V A1 REF A1 = OP777, OP193 –V DD Figure 42. Negative Reference ADR421 ADR421 ADR421 OUT ...
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... Figure 44. Advantage of Kelvin Connection 1µF 0.1µ OUT R1 10kΩ U1 ADR425 +10V V+ GND TRIM OP1177 V– R3 5kΩ –10V Figure 45 and −5 V Reference Using ADR425 +2.5V +10V OUT U1 R1 ADR425 5.6kΩ GND TRIM 5.6kΩ OP1177 V – –2.5V –10V Figure 46. +2.5 V and − ...
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... PROGRAMMABLE CURRENT SOURCE Together with a digital potentiometer and a Howland current pump, the ADR425 forms the reference source for a program- mable current as + ⎛ ⎞ ⎜ ⎟ ⎝ ⎠ × and D = × REF N 2 where the decimal equivalent of the input code. ...
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... ADC, calibration microcontroller with on-chip static RAM, clock oscillator, and serial communications port. +5V ANALOG SUPPLY 0.1µF 10µF AD7701 OUT REF ADR420/ 0.1µF ADR421/ ADR423/ ADR425 GND RANGES BP/UP SELECT CAL CALIBRATE ANALOG A IN INPUT ANALOG AGND GROUND 0.1µ –5V ANALOG SUPPLY 0.1µ ...
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... Figure 51. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches) 3.20 3.00 2.80 5. 3.20 4.90 3.00 4.65 2. PIN 1 0.65 BSC 0.95 0.85 1.10 MAX 0.75 0.15 0.38 0.23 0.00 0.22 0.08 SEATING COPLANARITY PLANE 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 52. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters Rev Page ADR420/ADR421/ADR423/ADR425 0.50 (0.0196) 45° 0.25 (0.0099) 1.27 (0.0500) 0.40 (0.0157) 0.80 8° 0.60 0° 0.40 ...
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... ADR425AR 5.00 6 ADR425AR-REEL7 5. ADR425ARZ 5. ADR425ARZ-REEL7 5.00 6 ADR425ARM 5.00 6 ADR425ARM-REEL7 5. ADR425ARMZ 5. ADR425ARMZ-REEL7 5.00 6 ADR425BR 5.00 2 ADR425BR-REEL7 5. ADR425BRZ 5. ADR425BRZ-REEL7 5. RoHS Compliant Part. # denotes RoHS-compliant product may be top or bottom marked. Initial Temperature Accuracy Coefficient Temperature (ppm/°C) Range % 0.15 10 −40°C to +125°C 0.15 10 − ...
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... NOTES ADR420/ADR421/ADR423/ADR425 Rev Page ...
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... ADR420/ADR421/ADR423/ADR425 NOTES ©2001–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C02432-0-6/07(H) Rev Page ...