Datasheet

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Micropower, High Accuracy

Voltage References

Data Sheet

ADR3525/ADR3530/ADR3533/ADR3540/ADR3550

Rev. 0

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FEATURES

Maximum temperature coefficient: 5 ppm/°C (B grade)

Low long-term drift (LTD): 30 ppm (initial 1 khr typical)

Initial output voltage error: ±0.1% (maximum)

Operating temperature range: −40°C to +125°C

Output current: +10 mA source/−3 mA sink

Low quiescent current: 100 μA (maximum)

Low dropout voltage: 250 mV at 2 mA

Output voltage noise (0.1 Hz to 10 Hz): 29 μV p-p at

4.096 V (typical)

Qualified for automotive applications

APPLICATIONS

Automotive battery monitors

Portable instrumentation

Process transmitters

Remote sensors

Medical instrumentation

PIN CONFIGURATION

09594-001

ENABLE

GND SENSE

GND FORCE

OUT

SENSE

OUT

FORCE

NOTES

1. NC = NO CONNECT. DO NOT

CONNECT TO THIS PIN.

ADR35xx

TOP VIEW

(Not to Scale)

Figure 1. 8-Lead MSOP (RM-8 Suffix)

GENERAL DESCRIPTION

The ADR3525W, ADR3530W, ADR3533W, ADR3540W, and

ADR3550W are low cost, low power, high precision CMOS

voltage references, featuring a maximum temperature coeffi-

cient (TC) of 5 ppm/°C (B grade), 8 ppm/°C (A grade), low

operating current, and low output noise in an 8-lead MSOP

package. For high accuracy, the output voltage and temperature

coefficient are trimmed digitally during final assembly using the

Analog Devices, Inc., patented DigiTrim® technology.

The low output voltage hysteresis and low long-term output

voltage drift improve lifetime system accuracy.

These CMOS references are available in five output voltages, all

of which are specified over the automotive temperature range of

−40°C to +125°C.

Table 1. Selection Guide

Model Output Voltage (V) Input Voltage Range (V)

ADR3525W 2.500 2.7 to 5.5

ADR3530W 3.000 3.2 to 5.5

ADR3533W 3.300 3.5 to 5.5

ADR3540W 4.096 4.3 to 5.5

ADR3550W 5.000 5.2 to 5.5

Summary of content (20 pages)

PAGE 1
FEATURES PIN CONFIGURATION Maximum temperature coefficient: 5 ppm/°C (B grade) Low long-term drift (LTD): 30 ppm (initial 1 khr typical) Initial output voltage error: ±0.1% (maximum) Operating temperature range: −40°C to +125°C Output current: +10 mA source/−3 mA sink Low quiescent current: 100 μA (maximum) Low dropout voltage: 250 mV at 2 mA Output voltage noise (0.1 Hz to 10 Hz): 29 μV p-p at 4.
PAGE 2
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Terminology .................................................................................... 16 Applications ....................................................................................... 1 Theory of Operation ...................................................................... 17 Pin Configuration ................
PAGE 3
Data Sheet ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 SPECIFICATIONS ADR3525 ELECTRICAL CHARACTERISTICS VIN = 2.7 V to 5.5 V, IL = 0 mA, TA = 25°C, unless otherwise noted. Table 2. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR Symbol VOUT VOERR Conditions TEMPERATURE COEFFICIENT A Grade B Grade LINE REGULATION TCVOUT −40°C ≤ TA ≤ +125°C LOAD REGULATION Sourcing ΔVOUT/ΔVIN IL = 0 mA to 10 mA, VIN = 3.0 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to −3 mA, VIN = 3.0 V, −40°C ≤ TA ≤ +125°C VIN = 3.
PAGE 4
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 Data Sheet ADR3530 ELECTRICAL CHARACTERISTICS VIN = 3.2 V to 5.5 V, IL = 0 mA, TA = 25°C, unless otherwise noted. Table 3. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR Symbol VOUT VOERR Conditions TEMPERATURE COEFFICIENT A Grade B Grade LINE REGULATION TCVOUT −40°C ≤ TA ≤ +125°C LOAD REGULATION Sourcing ΔVOUT/ΔVIN IL = 0 mA to 10 mA, VIN = 3.5 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to −3 mA, VIN = 3.5 V, −40°C ≤ TA ≤ +125°C VIN = 3.5 V to 5.5 V VIN = 3.
PAGE 5
Data Sheet ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 ADR3533 ELECTRICAL CHARACTERISTICS VIN = 3.5 V to 5.5 V, IL = 0 mA, TA = 25°C, unless otherwise noted. Table 4. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR Symbol VOUT VOERR Test Conditions/Comments TEMPERATURE COEFFICIENT A Grade B Grade LINE REGULATION TCVOUT −40°C ≤ TA ≤ +125°C LOAD REGULATION Sourcing ΔVOUT/ΔVIN IL = 0 mA to 10 mA, VIN = 3.8 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to −3 mA, VIN = 3.8 V, −40°C ≤ TA ≤ +125°C VIN = 3.8 V to 5.
PAGE 6
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 Data Sheet ADR3540 ELECTRICAL CHARACTERISTICS VIN = 4.3 V to 5.5 V, IL = 0 mA, TA = 25°C, unless otherwise noted. Table 5. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR Symbol VOUT VOERR Test Conditions/Comments TEMPERATURE COEFFICIENT A Grade B Grade LINE REGULATION TCVOUT −40°C ≤ TA ≤ +125°C LOAD REGULATION Sourcing ΔVOUT/ΔVIN IL = 0 mA to 10 mA, VIN = 4.6 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to −3 mA, VIN = 4.6 V, −40°C ≤ TA ≤ +125°C VIN = 4.6 V to 5.
PAGE 7
Data Sheet ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 ADR3550 ELECTRICAL CHARACTERISTICS VIN = 5.2 V to 5.5 V, TA = 25°C, ILOAD = 0 mA, unless otherwise noted. Table 6. Parameter OUTPUT VOLTAGE INITIAL OUTPUT VOLTAGE ERROR Symbol VOUT VOERR Test Conditions/Comments TEMPERATURE COEFFICIENT A Grade B Grade LINE REGULATION TCVOUT −40°C ≤ TA ≤ +125°C LOAD REGULATION Sourcing ΔVOUT/ΔIL ΔVOUT/ΔVIN VIN = 5.5 V VIN = 5.5 V Max 5.005 ±0.1 ±5.0 Unit V % mV 2.5 2.
PAGE 8
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 Data Sheet ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted. THERMAL RESISTANCE Table 7. θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Parameter Supply Voltage ENABLE to GND SENSE Voltage Operating Temperature Range Storage Temperature Range Junction Temperature Range Rating 6V VIN −40°C to +125°C −65°C to +150°C −65°C to +150°C Table 8.
PAGE 9
Data Sheet ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 ENABLE 1 GND SENSE 2 GND FORCE 3 ADR35xx TOP VIEW (Not to Scale) NC 4 8 VIN 7 VOUT SENSE 6 VOUT FORCE 5 NC NOTES 1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN. 09594-002 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Figure 2. Pin Configuration Table 9. Pin Function Descriptions Pin No. 1 2 3 4 5 6 7 8 Mnemonic ENABLE GND SENSE GND FORCE NC NC VOUT FORCE VOUT SENSE VIN Description Enable Connection. Enables or disables the device.
PAGE 10
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. 2.5008 5.0010 OUTPUT VOLTAGE (V) 5.0015 2.5004 2.5002 2.5000 2.4998 2.4996 5.0005 5.0000 4.9995 4.9990 4.9985 2.4992 4.9980 2.4990 –40 –25 –10 5 20 35 50 65 80 95 110 125 TEMPERATURE (ºC) 09594-003 2.4994 4.9975 –40 –25 –10 5 20 35 50 65 80 95 110 125 TEMPERATURE (ºC) Figure 3. ADR3525 Output Voltage vs. Temperature Figure 6.
PAGE 11
Data Sheet ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 400 –40°C +25°C +125°C 300 250 1 200 150 10µV/DIV 100 50 TIME = 1s/DIV –2 –1 0 1 2 3 4 5 6 7 8 9 10 LOAD CURRENT (mA) CH1 pk-pk = 18µV 09594-009 0 –3 Figure 9. ADR3525 Dropout Voltage vs. Load Current CH1 RMS = 3.14µV 09594-012 DIFFERENTIAL VOLTAGE (mV) 350 Figure 12. ADR3525 Output Voltage Noise (0.
PAGE 12
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 Data Sheet CL = 1.1µF CIN = 0.1µF –10 –20 –30 –40 1 –50 –60 10µV/DIV –70 10 100 1k 10k 100k FREQUENCY (Hz) CH1 pk-pk = 33.4µV Figure 15. ADR3525 Ripple Rejection Ratio vs. Frequency CH1 RMS = 5.68µV 09594-018 –90 09594-015 –80 Figure 18. ADR3550 Output Voltage Noise (0.1 Hz to 10 Hz) CIN = CL = 0.1µF RL = ∞ 1 VIN = 2V/DIV 1 09594-016 VOUT = 1V/DIV CH1 pk-pk = 446µV Figure 16. ADR3525 Start-Up Response CH1 RMS = 60.
PAGE 13
Data Sheet CL = 1.1µF CIN = 0.1µF –10 ENABLE 1V/DIV –20 CIN = CL = 0.1µF VIN = 3V RL = 1kΩ –30 –40 1 –50 –60 2 –90 10 100 1k 10k 100k FREQUENCY (Hz) VOUT = 1V/DIV TIME = 200µs/DIV 09594-021 –80 09594-024 –70 Figure 24. ADR3525 Shutdown Response Figure 21. ADR3550 Ripple Rejection Ratio vs. Frequency 3.2V CIN = 0µF CL = 0.1µF RL = ∞ VIN 2V/DIV 2.7V 500mV/DIV CIN = CL = 0.1µF 1 2 VOUT = 10mV/DIV VOUT 2V/DIV 09594-022 09594-025 TIME = 200µs/DIV 2 TIME = 1ms/DIV 1 Figure 22.
PAGE 14
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 Data Sheet 100 VIN = 5.5 V 90 SUPPLY CURRENT (µA) 80 ENABLE 2V/DIV CIN = CL = 0.1µF VIN = 5V RL = 1kΩ 1 70 60 50 40 30 20 TIME = 200µs/DIV 0 –40 –25 –10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) Figure 27. ADR3550 Shutdown Response 09594-030 VOUT = 2V/DIV 09594-027 10 2 Figure 30. Supply Current vs. Temperature 2.0 –40°C +25°C +125°C 1.8 VIN = 100mV/DIV 1.6 SUPPLY CURRENT (mA) 5.5V CIN = CL = 0.1µF 1 5.2V 1.4 1.2 1.0 0.8 0.6 0.
PAGE 15
Data Sheet ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 80 8 NUMBER OF DEVICES 7 6 5 4 3 2 0.020 Figure 33. Output Voltage Drift Distribution After Reflow (SHR Drift) TA = +25°C → –40°C → +125°C → +25°C 7 6 5 4 3 2 1 40 09594-034 OUTPUT VOLTAGE HYSTERESIS (ppm) 20 30 10 –10 0 –20 –40 –30 –50 –70 –60 –80 –100 –90 –110 –130 –120 0 –140 0 –20 –40 –60 0 200 400 600 800 1000 Figure 35.
PAGE 16
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 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. Long-Term Output Voltage Drift (ΔVOUT_LTD) Long-term output voltage drift refers to the shift in output voltage after 1000 hours of operation in a constant 50°C environment.
PAGE 17
Data Sheet ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 THEORY OF OPERATION VIN ENABLE BAND GAP VOLTAGE REFERENCE LONG-TERM OUTPUT VOLTAGE DRIFT VBG VOUT FORCE VOUT SENSE RFB1 GND FORCE 09594-036 RFB2 GND SENSE Figure 36. Block Diagram The ADR3525W/ADR3530W/ADR3533W/ADR3540W/ ADR3550W use a patented voltage reference architecture to achieve high accuracy, low temperature coefficient (TC), and low noise in a CMOS process.
PAGE 18
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 Data Sheet APPLICATIONS INFORMATION BASIC VOLTAGE REFERENCE CONNECTION 1µF 0.1µF 8 VIN VOUT FORCE 6 1 ENABLE VOUT SENSE 7 AD3525/ADR3530/ ARD3533/ADR3540/ ADR3550 VOUT 2.5V 0.1µF 09594-037 GND SENSE 2 GND FORCE 3 voltages can be sensed accurately.
PAGE 19
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 SAMPLE APPLICATIONS VIN 8 V IN Negative Reference +5V VOUT FORCE 6 R1 10kΩ 1 ENABLE V 7 OUT SENSE Figure 39 shows how to connect the ADR3550 and a standard CMOS op amp, such as the AD8663, to provide a negative reference voltage.
PAGE 20
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550 Data Sheet OUTLINE DIMENSIONS 3.20 3.00 2.80 3.20 3.00 2.80 8 1 5.15 4.90 4.65 5 4 PIN 1 IDENTIFIER 0.65 BSC 0.95 0.85 0.75 15° MAX 1.10 MAX 0.40 0.25 6° 0° 0.23 0.09 0.80 0.55 0.40 COMPLIANT TO JEDEC STANDARDS MO-187-AA 10-07-2009-B 0.15 0.05 COPLANARITY 0.10 Figure 42.