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ADR3525 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADR3525
Beschreibung High Accuracy Voltage References
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 20 Seiten
ADR3525 Datasheet, Funktion
Data Sheet
Micropower, High Accuracy
Voltage References
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550
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
ENABLE 1
GND SENSE 2
GND FORCE 3
NC 4
ADR35xx
TOP VIEW
(Not to Scale)
8 VIN
7 VOUT SENSE
6 VOUT FORCE
5 NC
NOTES
1. NC = NO CONNECT. DO NOT
CONNECT TO THIS PIN.
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)
ADR3525W 2.500
ADR3530W 3.000
ADR3533W 3.300
ADR3540W 4.096
ADR3550W 5.000
Input Voltage Range (V)
2.7 to 5.5
3.2 to 5.5
3.5 to 5.5
4.3 to 5.5
5.2 to 5.5
Rev. 0
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2011 Analog Devices, Inc. All rights reserved.






ADR3525 Datasheet, Funktion
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
TEMPERATURE COEFFICIENT
A Grade
B Grade
LINE REGULATION
LOAD REGULATION
Sourcing
Sinking
OUTPUT CURRENT CAPACITY
Sourcing
Sinking
QUIESCENT CURRENT
Normal Operation
Shutdown
DROPOUT VOLTAGE1
ENABLE PIN
Shutdown Voltage
ENABLE Voltage
ENABLE Pin Leakage Current
OUTPUT VOLTAGE NOISE
OUTPUT VOLTAGE NOISE DENSITY
OUTPUT VOLTAGE HYSTERESIS2
RIPPLE REJECTION RATIO
LONG-TERM OUTPUT VOLTAGE DRIFT
TURN-ON SETTLING TIME
Symbol
VOUT
VOERR
TCVOUT
Test Conditions/Comments
−40°C ≤ TA ≤ +125°C
ΔVOUT/ΔVIN
ΔVOUT/ΔIL
IL
IQ
VDO
VIN = 4.3 V to 5.5 V
VIN = 4.3 V to 5.5 V, −40°C ≤ TA ≤ +125°C
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 5.5 V
VIN = 4.6 V to 5.5 V
ENABLE ≥ VIN × 0.85
ENABLE = VIN, −40°C ≤ TA ≤ +125°C
ENABLE ≤ 0.7 V
IL = 0 mA, TA = −40°C ≤ TA ≤ +125°C
IL = 2 mA, TA = −40°C ≤ TA ≤ +125°C
VL
VH
IEN
en p-p
en
ΔVOUT_HYS
RRR
ΔVOUT_LTD
tR
ENABLE = VIN, TA = −40°C ≤ TA ≤ +125°C
f = 0.1 Hz to 10 Hz
f = 10 Hz to 10 kHz
f = 1 kHz
TA = +25°C to −40°C to +125°C to +25°C
fIN = 60 Hz
1000 hours at 50°C
CIN = 0.1 μF, CL = 0.1 μF, RL = 1 kΩ
Min
4.0919
Typ
4.0960
Max
4.1000
±0.1
±4.096
Unit
V
%
mV
2.5 8
ppm/°C
2.5 5
ppm/°C
3 50 ppm/V
120 ppm/V
6 30 ppm/mA
15 50 ppm/mA
10
−3
50
75
0
VIN × 0.85
0.85
29
53
1.4
70
−60
30
800
85
100
5
200
250
0.7
VIN
3
mA
mA
μA
μA
μA
mV
mV
V
V
μA
μV p-p
μV rms
μV/√Hz
ppm
dB
ppm
μs
1 Refers to the minimum difference between VIN and VOUT such that VOUT maintains a minimum accuracy of 0.1%. See the Terminology section.
2 See the Terminology section. The part is placed through the temperature cycle in the order of temperatures shown.
Rev. 0 | Page 6 of 20

6 Page









ADR3525 pdf, datenblatt
ADR3525/ADR3530/ADR3533/ADR3540/ADR3550
Data Sheet
0
CL = 1.1µF
–10 CIN = 0.1µF
–20
–30
–40
–50
–60
–70
–80
–90
10
100 1k 10k
FREQUENCY (Hz)
100k
Figure 15. ADR3525 Ripple Rejection Ratio vs. Frequency
1
10µV/DIV
CH1 pk-pk = 33.4µV
CH1 RMS = 5.68µV
Figure 18. ADR3550 Output Voltage Noise (0.1 Hz to 10 Hz)
1
VIN = 2V/DIV
RCILN==CL = 0.1µF
1
2
VOUT = 1V/DIV
TIME = 200µs/DIV
Figure 16. ADR3525 Start-Up Response
ENABLE
1
2
VENABLE = 1V/DIV
VIN = 3.0V
CIN = CL = 0.1µF
RL =
VOUT = 1V/DIV
TIME = 200µs/DIV
Figure 17. ADR3525 Restart Response from Shutdown
100µV/DIV
CH1 pk-pk = 446µV
CH1 RMS = 60.3µV
Figure 19. ADR3550 Output Voltage Noise (10 Hz to 10 kHz)
12
10
8
6
4
2
0
0.1 1 10 100 1k
FREQUENCY (Hz)
Figure 20. ADR3550 Output Noise Spectral Density
10k
Rev. 0 | Page 12 of 20

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