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Ultralow Noise, High Accuracy

Voltage References

Data Sheet

ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550

Rev. B Document Feedback

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FEATURES

Maximum temperature coefficient (TCV

OUT

1 ppm/°C (C grade 0°C to +70°C)

2 ppm/°C (B grade −40°C to +125°C)

Output noise (0.1 Hz to 10 Hz):

1 μV p-p at V

OUT

of 2.048 V typical

Initial output voltage error:

B grade: ±0.02% (maximum)

Input voltage range: 3 V to 15 V

Operating temperature:

A grade and B grade: −40°C to +125°C

C grade: 0°C to +70°C

Output current: +10 mA source/−10 mA sink

Low quiescent current: 950 μA (maximum)

Low dropout voltage: 300 mV at 2 mA (V

OUT

≥ 3 V)

8-lead SOIC package

Qualified for automotive applications

Long-term drift: 51 ppm typical at 4500 hours

PIN CONFIGURATION

NIC

GND

DNC

NIC

OUT

NIC

NOTES

1. NIC = NOT INTERNALLY CONNECTED.

THIS PIN IS NOT CONNECTED INTERNALLY.

2. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.

ADR4520/ADR4525/

ADR4530/ADR4533/

ADR4540/ADR4550

TOP VIEW

(Not to Scale)

10203-001

Figure 1. 8-Lead SOIC

APPLICATIONS

Precision data acquisition systems

High resolution data converters

High precision measurement devices

Industrial instrumentation

Medical devices

Automotive battery monitoring

GENERAL DESCRIPTION

The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/

ADR4550 devices are high precision, low power, low noise

voltage references featuring ±0.02% maximum initial error,

excellent temperature stability, and low output noise.

This family of voltage references uses an innovative core topology

to achieve high accuracy while offering industry-leading

temperature stability and noise performance. The low, thermally

induced output voltage hysteresis and low long-term output

voltage drift of the devices also improve system accuracy over

time and temperature variations.

A maximum operating current of 950 μA and a maximum low

dropout voltage of 300 mV allow the devices to function very

well in portable equipment.

The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/

ADR4550 series of references are each provided in an 8-lead

SOIC package and are available in a wide range of output voltages,

all of which are specified over the extended industrial tem-

perature range of −40°C to +125°C. The ADR4525W, available

in an 8-lead SOIC package, is qualified for automotive applications.

Table 1. Selection Guide

Model Output Voltage (V) Grade

ADR4520 2.048 A, B

ADR4525 2.5 A, B, C

ADR4525W 2.5 B

ADR4530 3.0 A, B

ADR4533 3.3 A, B

ADR4540 4.096 A, B

ADR4550 5.0 A, B

Table 2. Voltage Reference Choices from Analog Devices, Inc.

OUT

(V) Micropower Low Power Ultralow Noise

2.048 ADR3420 ADR360 ADR440

LT6656 LTC6652 LTC6655

LT6654

2.5 ADR3425 ADR361 ADR441

LT1461 LTC6652 LTC6655

LT6656 LT6654

5.0 ADR3450 ADR365 ADR445

LT1461 LTC6652 LTC6655

LT6656 LT6654

Downloaded from Arrow.com.

Summary of content (37 pages)

PAGE 1
Ultralow Noise, High Accuracy Voltage References ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 FEATURES PIN CONFIGURATION Maximum temperature coefficient (TCVOUT): 1 ppm/°C (C grade 0°C to +70°C) 2 ppm/°C (B grade −40°C to +125°C) Output noise (0.1 Hz to 10 Hz): 1 μV p-p at VOUT of 2.048 V typical Initial output voltage error: B grade: ±0.
PAGE 2
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 ADR4530 ..................................................................................... 18 Pin Configuration ............................................................................. 1 ADR4533 ..................................................................................... 21 Applications ..................
PAGE 3
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 REVISION HISTORY 12/2018—Rev. A to Rev. B Changes to Features Section, Table 1, and Table 2........................ 1 Changes to Table 3 ............................................................................ 4 Changes to Table 4 ............................................................................ 5 Changes to Table 5 ............................................................................ 6 Changes to Table 6 ....................
PAGE 4
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet SPECIFICATIONS ADR4520 ELECTRICAL CHARACTERISTICS Unless otherwise noted, supply voltage (VIN) = 3 V to 15 V, IL = 0 mA, TA = 25°C. Table 3. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR B Grade Symbol VOUT VOUT_ERR Test Conditions/Comments Min Typ 2.048 Max Unit V ±0.02 410 ±0.04 820 % μV % μV % 2 4 4 8 10 80 120 950 1 1 ppm/°C ppm/°C ppm/°C ppm/°C ppm/V ppm/mA ppm/mA μA V V dB −8 10 1.0 35.
PAGE 5
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 ADR4525 ELECTRICAL CHARACTERISTICS Unless otherwise noted, VIN = 3 V to 15 V, IL = 0 mA, TA = 25°C. Table 4. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR C Grade Symbol VOUT VOUT_ERR Test Conditions/Comments Min Typ 2.500 Max Unit V ±0.02 500 ±0.02 500 ±0.04 1 % μV % μV % mV % 1 2 2 4 4 8 10 80 120 950 500 500 ppm/°C ppm/°C ppm/°C ppm/°C ppm/°C ppm/°C ppm/V ppm/mA ppm/mA μA mV mV dB −10 10 1.25 41.
PAGE 6
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet ADR4530 ELECTRICAL CHARACTERISTICS Unless otherwise noted, VIN = 3.1 V to 15 V, IL = 0 mA, TA = 25°C. Table 5. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR B Grade Symbol VOUT VOUT_ERR Test Conditions/Comments Min Typ 3.000 Max Unit V ±0.02 600 ±0.04 1.2 % μV % mV % 2 4 4 8 10 80 120 950 100 300 ppm/°C ppm/°C ppm/°C ppm/°C ppm/V ppm/mA ppm/mA μA mV mV dB −10 10 1.
PAGE 7
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 ADR4533 ELECTRICAL CHARACTERISTICS Unless otherwise noted, VIN = 3.4 V to 15 V, IL = 0 mA, TA = 25°C. Table 6. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR B Grade Symbol VOUT VOUT_ERR Test Conditions/Comments Min Typ 3.300 Max Unit V ±0.02 660 ±0.04 1.32 % µV % mV % 2 4 4 8 10 80 120 950 100 300 ppm/°C ppm/°C ppm/°C ppm/°C ppm/V ppm/mA ppm/mA μA mV mV dB −10 10 2.1 64.
PAGE 8
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet ADR4540 ELECTRICAL CHARACTERISTICS Unless otherwise noted, VIN = 4.2 V to 15 V, IL = 0 mA, TA = 25°C. Table 7. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR B Grade Symbol VOUT VOUT_ERR Test Conditions/Comments Min Typ 4.096 Max Unit V ±0.02 820 ±0.04 1.64 % μV % mV % 2 4 4 8 10 80 120 950 100 300 ppm/°C ppm/°C ppm/°C ppm/°C ppm/V ppm/mA ppm/mA μA mV mV dB −10 10 2.7 83.
PAGE 9
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 ADR4550 ELECTRICAL CHARACTERISTICS Unless otherwise noted, VIN = 5.1 V to 15 V, IL = 0 mA, TA = 25°C. Table 8. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR B Grade Symbol VOUT VOUT_ERR Test Conditions/Comments Min Typ 5.000 Max Unit V ±0.02 1 ±0.04 2 % mV % mV % 2 4 4 8 10 80 120 950 100 300 ppm/°C ppm/°C ppm/°C ppm/°C ppm/V ppm/mA ppm/mA μA mV mV dB −10 10 2.8 95.
PAGE 10
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted. THERMAL RESISTANCE Table 9. Thermal performance is directly linked to printed circuit board (PCB) design and operating environment. Close attention to PCB thermal design is required.
PAGE 11
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS ADR4520/ADR4525/ ADR4530/ADR4533/ ADR4540/ADR4550 NIC 1 8 DNC VIN 2 7 NIC 6 VOUT TOP VIEW GND 4 (Not to Scale) 5 NIC NOTES 1. NIC = NOT INTERNALLY CONNECTED. THIS PIN IS NOT CONNECTED INTERNALLY. 2. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN. 10203-002 NIC 3 Figure 2. Pin Configuration Table 11. Pin Function Descriptions Pin No.
PAGE 12
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. ADR4520 2.0485 35 ADR4520 ADR4520 2.0484 30 LOAD REGULATION (ppm/mA) 2.0483 2.0481 2.0480 2.0479 2.0478 2.0477 25 20 15 10 5 2.0476 –30 –10 10 30 50 70 90 110 0 –60 10203-101 2.0475 –50 130 TEMPERATURE (°C) –40 –20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) Figure 3. ADR4520 B Grade Output Voltage vs. Temperature 10203-107 VOUT (V) 2.
PAGE 13
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 1000 1k ADR4520 ADR4520 +125°C ISY (µA) +25°C –40°C 400 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VIN (V) 10 1 0.01 10203-110 200 100 10 100 1k 10k 100k Figure 11. ADR4520 Output Noise Spectral Density 0 ADR4520 –10 CLOAD = 1µF ADR4520 RIPPLE REJECTION RATIO (dB) 100 OCCURRENCE 1 FREQUENCY (Hz) Figure 9. ADR4520 Supply Current (ISY) vs. Supply Voltage 120 0.
PAGE 14
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet 80 ADR4520 T 70 NUMBER OF UNITS 60 INPUT 2 W M40.0µs T 12.0% A CH1 7.02V 0 –0.06 OUTPUT IMPEDANCE (Ω) RL = 1kΩ CL = 1µF 30 RL = 100kΩ CL = 10µF 20 RL = 100kΩ CL = 1µF 100 1k 10k 100k FREQUENCY (Hz) 1M 10203-115 10 0 10 Figure 14. ADR4520 Output Impedance vs. Frequency Rev. B | Page 14 of 37 Downloaded from Arrow.com. 0 0.02 0.04 0.06 Figure 15.
PAGE 15
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 ADR4525 2.5005 1.4 ADR4525 ADR4525 2.5004 1.2 +125°C +25°C DROPOUT VOLTAGE (V) 2.5003 VOUT (V) 2.5002 2.5001 2.5000 2.4999 2.4998 1.0 0.8 –40°C 0.6 0.4 2.4997 0.2 –30 –10 10 30 50 90 70 110 130 TEMPERATURE (°C) 0 –15 10203-201 2.4995 –50 –10 –5 0 5 10 15 ILOAD (mA) Figure 16. ADR4525 B Grade Output Voltage vs. Temperature 10203-206 2.4996 Figure 19. ADR4525 Dropout Voltage vs. Load Current 2.49980 35 2.
PAGE 16
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 1.4 Data Sheet 160 ADR4525 1.3 ADR4525 140 120 1.1 OCCURRENCE LINE REGULATION (ppm/V) 1.2 1.0 0.9 0.8 0.7 100 80 60 40 0.6 20 0 –40 –20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) 0.6 10203-209 0.4 –60 1.5 1.8 2.1 2.4 1k ADR4525 +125°C 1.2 2.7 3.0 Figure 24. ADR4525 Output Voltage Noise (Maximum Amplitude from 0.1 Hz to 10 Hz) Figure 22. ADR4525 Line Regulation vs. Temperature 900 0.
PAGE 17
Data Sheet 0 ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 80 ADR4525 ADR4525 70 –20 –30 OUTPUT IMPEDANCE (Ω) RIPPLE REJECTION RATIO (dB) –10 –40 –50 –60 –70 –80 –90 –100 RL = 1kΩ CL = 1µF 60 50 RL = 1kΩ CL = 10µF 40 RL = 100kΩ CL = 1µF 30 RL = 100kΩ CL = 10µF 20 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) 0 10 10203-213 –120 10 100 1k 10k 100k 1M FREQUENCY (Hz) Figure 26. ADR4525 Ripple Rejection Ratio vs. Frequency 10203-215 –110 Figure 28.
PAGE 18
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet ADR4530 3.0005 1.4 ADR4530 ADR4530 3.0004 1.2 +125°C DROPOUT VOLTAGE (V) 3.0003 VOUT (V) 3.0002 3.0001 3.0000 2.9999 2.9998 1.0 +25°C 0.8 –40°C 0.6 0.4 2.9997 0.2 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 0 –15 10203-301 2.9995 –50 –10 –5 0 5 10 15 ILOAD (mA) 10203-306 2.9996 Figure 33. ADR4530 Dropout Voltage vs. Load Current Figure 30. ADR4530 B Grade Output Voltage vs.
PAGE 19
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 1.4 1k ADR4530 ADR4530 1.3 NOISE DENSITY (nV rms/ Hz) LINE REGULATION (ppm/V) 1.2 1.1 1.0 0.9 0.8 0.7 0.6 100 10 –40 –20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) 1 0.01 10203-309 0.
PAGE 20
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 60 Data Sheet 80 ADR4530 70 60 NUMBER OF UNITS OUTPUT IMPEDANCE (Ω) 50 40 30 RL = 1kΩ CL = 10µF 20 RL = 1kΩ CL = 1µF RL = 100kΩ CL = 1µF RL = 100kΩ CL = 10µF 50 40 30 20 10 1 10 100 1k 10k 100k 1M FREQUENCY (Hz) 10M Figure 42. ADR4530 Output Impedance vs. Frequency –0.04 –0.02 0 0.02 0.04 0.06 SOLDER HEAT SHIFT (%) Figure 43. ADR4530 Solder Heat Resistance Shift (3 × Reflow) Rev. B | Page 20 of 37 Downloaded from Arrow.com.
PAGE 21
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 ADR4533 3.3010 35 ADR4533 ADR4533 3.3008 30 LOAD REGULATION (ppm/mA) 3.3006 VOUT (V) 3.3004 3.3002 3.3000 3.2998 3.2996 3.2994 25 20 15 10 5 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 0 –60 10203-401 3.2990 –50 –40 –20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) Figure 44. ADR4533 B Grade Output Voltage vs. Temperature 10203-407 3.2992 Figure 47. ADR4533 Load Regulation vs.
PAGE 22
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 900 Data Sheet 1k ADR4533 ADR4533 +125°C NOISE DENSITY (nV rms/ Hz) 800 700 +25°C ISY (µA) 600 –40°C 500 400 300 200 100 10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VIN (V) 1 0.01 10203-410 0 1 10 100 1k 10k 100k FREQUENCY (Hz) Figure 52. ADR4533 Output Noise Spectral Density Figure 50. ADR4533 Supply Current vs. Supply Voltage 0 60 ADR4533 ADR4533 –10 –20 RIPPLE REJECTION RATIO (dB) 50 40 OCCURRENCE 0.
PAGE 23
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 80 ADR4533 T 70 NUMBER OF UNITS 60 INPUT 2 OUTPUT AC M200µs T 12.0% A CH1 7.02V 0 –0.06 OUTPUT IMPEDANCE (Ω) 50 40 RL = 1kΩ CL = 1µF RL = 100kΩ CL = 1µF RL = 100kΩ CL = 10µF 0 10 100 1k 10k 100k 1M FREQUENCY (Hz) 10M 10203-415 10 1 Figure 55. ADR4533 Output Impedance vs. Frequency Rev. B | Page 23 of 37 Downloaded from Arrow.com. 0 0.02 0.04 0.06 Figure 56.
PAGE 24
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet ADR4540 4.0970 35 ADR4540 ADR4540 LOAD REGULATION (ppm/mA) 30 VOUT (V) 4.0965 4.0960 4.0955 25 20 15 10 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 0 –60 10203-501 4.0950 –50 –40 –20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) Figure 57. ADR4540 B Grade Output Voltage vs. Temperature 10203-507 5 Figure 60. ADR4540 Load Regulation vs.
PAGE 25
Data Sheet 900 ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 1k ADR4540 ADR4540 +125°C NOISE DENSITY (nV rms/ Hz) 800 700 +25°C 600 ISY (µA) –40°C 500 400 300 200 100 10 0 1 2 4 3 5 6 7 8 9 10 11 12 13 14 15 16 VIN (V) 1 0.01 10203-510 0 0.1 1 10 100 1k 10k 100k FREQUENCY (Hz) 10203-512 100 Figure 65. ADR4540 Output Noise Spectral Density Figure 63. ADR4540 Supply Current vs.
PAGE 26
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet 80 ADR4540 T 70 NUMBER OF UNITS 60 INPUT 2 50 40 30 20 OUTPUT AC CH1 1.00V B CH2 1.00mV W M200µs T 12.0% A CH1 7.02V 0 –0.06 10203-514 1 OUTPUT IMPEDANCE (Ω) 50 RL = 100kΩ CL = 10µF 30 RL = 100kΩ CL = 1µF RL = 1kΩ CL = 10µF 20 RL = 1kΩ CL = 1µF 0 10 100 1k 10k 100k 1M FREQUENCY (Hz) 10M 10203-515 10 1 Figure 68. ADR4540 Output Impedance vs. Frequency Rev. B | Page 26 of 37 Downloaded from Arrow.com. 0 0.
PAGE 27
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 ADR4550 5.0010 35 ADR4550 ADR4550 LOAD REGULATION (ppm/mA) 30 VOUT (V) 5.0005 5.0000 4.9995 25 20 15 10 –30 –10 10 30 50 70 90 110 130 TEMPERATURE (°C) 0 –60 10203-601 4.9990 –50 –40 –20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) 10203-607 5 Figure 73. ADR4550 Load Regulation vs. Temperature (Sourcing) Figure 70. ADR4550 B Grade Output Voltage vs.
PAGE 28
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 900 ADR4550 Data Sheet 1k +125°C ADR4550 NOISE DENSITY (nV rms/ Hz) 800 700 +25°C ISY (µA) 600 –40°C 500 400 300 200 100 10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VIN (V) 1 0.01 10203-610 0 1 10 100 1k 10k 100k FREQUENCY (Hz) Figure 78. ADR4550 Output Noise Spectral Density Figure 76. ADR4550 Supply Current vs. Supply Voltage 9 0.1 10203-612 100 0 ADR4550 ADR4550 OCCURRENCE 7 6 5 4 3 2 0 1.9 2.1 2.3 2.5 2.
PAGE 29
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 80 ADR4550 T 70 NUMBER OF UNITS 60 INPUT 2 50 40 30 20 OUTPUT AC CH1 1.00V CH2 1.00mV B W M200µs T 12.0% A CH1 7.02V 0 –0.06 10203-614 1 OUTPUT IMPEDANCE (Ω) 120 RL = 100kΩ CL = 1µF 100 80 RL = 1kΩ CL = 0.1µF 60 40 RL = 1kΩ CL = 1µF 100 1k 10k 100k FREQUENCY (Hz) 1M 10203-615 20 0 10 Figure 81. ADR4550 Output Impedance vs. Frequency Rev. B | Page 29 of 37 Downloaded from Arrow.com. 0 0.02 0.04 0.
PAGE 30
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet TERMINOLOGY Dropout Voltage (VDO) Dropout voltage, sometimes referred to as supply voltage headroom or supply output voltage differential, is defined as the minimum voltage differential between the input and output such that the output voltage is maintained to within 0.1% accuracy. VDO = (VIN − VOUT)min|IL = constant Because the dropout voltage depends on the current passing through the device, it is always specified for a given load current.
PAGE 31
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 APPLICATIONS INFORMATION BASIC VOLTAGE REFERENCE CONNECTION POWER DISSIPATION The circuit shown in Figure 82 shows the basic configuration for the ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ ADR4550 family of voltage references. The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ ADR4550 voltage references are capable of sourcing and sinking up to 10 mA of load current at room temperature across the rated input voltage range.
PAGE 32
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Boosted Output Current Reference Figure 85 shows the LTD of the ADR4520/ADR4525/ADR4530/ ADR4533/ADR4540/ADR4550. The red, blue, and green traces show sample units. The mean drift after 4,500 hours is 51 ppm. Note that the early life drift (0 to 250 hours) accounts for 40% of the total drift observed over 4,500 hours, as shown in Figure 86.
PAGE 33
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 In addition to stability over time, as described in the Long-Term Drift section, it is useful to know the thermal hysteresis, that is, the stability vs. cycling of temperature. Thermal hysteresis is an important parameter because it tells the system designer how closely the signal returns to its starting amplitude after the ambient temperature changes and subsequent return to room temperature.
PAGE 34
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 100 400 HALF LOOP FULL LOOP 100 0 –100 –200 VSY = 5V 27 UNITS TA = 25°C RELATIVE HUMIDITY STEP FROM 20% TO 80% –300 0 100 200 300 500 400 600 ELAPSED TIME (Hours) 60 Figure 93 Change in Output Voltage vs. Time After Humidity Step Change (20% to 80% Relative Humidity) 40 200 0 –40 0 20 40 60 80 100 120 140 160 TEMPERATURE DELTA (°C) 10203-805 –20 Figure 92.
PAGE 35
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 POWER CYCLE HYSTERESIS By power cycling a large number of samples, the power cycle hysteresis can be determined. To keep this measurement independent of other variables and environmental effects, the power cycle testing was performed using a high precision measurement system, including an ultrastable oil bath. Figure 94 shows the power cycle hysteresis. The units were powered down for approximately 4 hours and then powered up.
PAGE 36
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 Data Sheet 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 1.75 (0.0688) 1.35 (0.0532) 0.51 (0.0201) 0.31 (0.0122) 0.50 (0.0196) 0.25 (0.0099) 45° 8° 0° 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.
PAGE 37
Data Sheet ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550 AUTOMOTIVE PRODUCTS The ADR4525W model is available with controlled manufacturing to support the quality and reliability requirements of automotive applications. Note that this automotive model may have specifications that differ from the commercial models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade product shown is available for use in automotive applications.