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AD1584 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD1584
Beschreibung Precision Series Mode Voltage References
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 16 Seiten
AD1584 Datasheet, Funktion
Data Sheet
2.5 V to 5.0 V Micropower, Precision
Series Mode Voltage References
AD1582/AD1583/AD1584/AD1585
FEATURES
Series reference (2.5 V, 3 V, 4.096 V, 5 V)
Low quiescent current: 70 µA maximum
Current output capability: ±5 mA
Wide supply range: VIN = VOUT + 200 mV to 12 V
Wideband noise (10 Hz to 10 kHz): 50 µV rms
Specified temperature range: −40°C to +125°C
Compact, surface-mount SOT-23 package
APPLICATIONS
Portable, battery-powered equipment; for example,
notebook computers, cellular phones, pagers, PDAs, GPSs,
and DMMs
Computer workstations; suitable for use with a wide range
of video RAMDACs
Smart industrial transmitters
PCMCIA cards
Automotive
Hard disk drives
3 V/5 V, 8-bit/12-bit data converters
GENERAL DESCRIPTION
The AD1582/AD1583/AD1584/AD1585 are low cost, low power,
low dropout, precision band gap references. These designs are
available as 3-terminal (series) devices and are packaged in the
compact SOT-23, 3-lead surface-mount package. The versatility
of these references makes them ideal for use in battery-powered
3 V or 5 V systems where there can be wide variations in supply
voltage and a need to minimize power dissipation.
The superior accuracy and temperature stability of the AD1582/
AD1583/AD1584/AD1585 result from the precise matching and
thermal tracking of on-chip components. Patented temperature
drift curvature correction design techniques minimize the
nonlinearities in the voltage output temperature characteristic.
PIN CONFIGURATION
VOUT 1
AD1582/
AD1583/
AD1584/
AD1585
3 VIN
GND 2 TOP VIEW
(Not to Scale)
Figure 1. 3-Lead SOT-23-3 (RT Suffix)
900
800
700
600
SHUNT REFERENCE1
500
400
300
200
100 AD1582 SERIES REFERENCE
0
2.7
VSUPPLY (V)
5
13.076kSOURCE RESISTOR.
Figure 2. Supply Current (μA) vs. Supply Voltage (V)
The AD1582/AD1583/AD1584/AD1585 series mode devices
source or sink up to 5 mA of load current and operate efficiently
with only 200 mV of required headroom supply. These parts
draw a maximum 70 μA of quiescent current with only a
1.0 μA/V variation with supply voltage. The advantage of
these designs over conventional shunt devices is extraordinary.
Valuable supply current is no longer wasted through an input
series resistor, and maximum power efficiency is achieved at
all input voltage levels.
The AD1582/AD1583/AD1584/AD1585 are available in two
grades, A and B, and are provided in a tiny footprint, the SOT-
23. All grades are specified over the industrial temperature
range of −40°C to +125°C.
Table 1. AD158x Products, Three Electrical Grades
Electrical
Grade
AD1582
Initial Accuracy
AD1583/AD1585
AD1584
Temperature
Coefficient
(ppm°C)
B 0.08% 0.10%
0.10% 50
A 0.80% 1.00%
0.98% 100
Rev. J
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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Tel: 781.329.4700 ©1997–2013 Analog Devices, Inc. All rights reserved.
Technical Support
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AD1584 Datasheet, Funktion
AD1582/AD1583/AD1584/AD1585
Data Sheet
AD1585 SPECIFICATIONS
@ TA = TMIN to TMAX, VIN = 6 V, unless otherwise noted.
Table 5.
Parameter
OUTPUT VOLTAGE (@ 25°C)
VO
INITIAL ACCURACY ERROR (@ 25°C)
VOERR
OUTPUT VOLTAGE TEMPERATURE DRIFT
TEMPERATURE COEFFICIENT (TCVO)
−40°C < TA < 125°C
0°C < TA < 70°C
MINIMUM SUPPLY HEADROOM (VIN – VOUT)
LOAD REGULATION
0 mA < IOUT < 5 mA (−40°C to +85°C)
0 mA < IOUT < 5 mA (−40°C to +125°C)
−5 mA < IOUT < 0 mA (−40°C to +85°C)
−5 mA < IOUT < 0 mA (−40°C to +125°C)
−0.1 mA < IOUT < +0.1 mA (−40°C to +85°C)
−0.1 mA < IOUT < +0.1 mA (−40°C to +125°C)
LINE REGULATION
VOUT + 200 mV < VIN < 12 V
IOUT = 0 mA
RIPPLE REJECTION (ΔVOUT/ΔVIN)
VIN = 6 V ± 100 mV (f = 120 Hz)
QUIESCENT CURRENT
SHORT-CIRCUIT CURRENT TO GROUND
NOISE VOLTAGE (@ 25°C)
0.1 Hz to 10 Hz
10 Hz to 10 kHz
TURN-ON SETTLING TIME TO 0.1%
CL = 0.2 μF
LONG-TERM STABILITY
1000 Hours @ 25°C
OUTPUT VOLTAGE HYSTERESIS
TEMPERATURE RANGE
Specified Performance (A, B, C)
Operating Performance (A, B, C)
AD1585A
Min Typ Max
4.950 5.000 5.050
−50 +50
−1.0 +1.0
100
40
35
200
100
0.40
0.6
0.40
0.6
4
4.8
25
80
70
15
140
100
175
100
115
−40 +125
−55 +125
AD1585B
Min Typ Max
4.995 5.000 5.005
−5
−0.10
+5
+0.10
50
18
15
200
50
0.40
0.6
0.40
0.6
4
4.8
25
80
70
15
140
100
175
100
115
−40 +125
−55 +125
Unit
V
mV
%
ppm/°C
ppm/°C
ppm/°C
mV
mV/mA
mV/mA
mV/mA
mV/mA
mV/mA
mV/mA
µV/V
dB
µA
mA
µV p-p
µV rms
µs
ppm/1000 hr
ppm
°C
°C
Rev. J | Page 6 of 16

6 Page









AD1584 pdf, datenblatt
AD1582/AD1583/AD1584/AD1585
Data Sheet
OUTPUT VOLTAGE HYSTERESIS
High performance industrial equipment manufacturers can
require the AD1582/AD1583/AD1584/AD1585 to maintain a
consistent output voltage error at 25°C after the references are
operated over the full temperature range. All references exhibit
a characteristic known as output voltage hysteresis; however, the
AD1582/AD1583/AD1584/AD1585 are designed to minimize
this characteristic. This phenomenon can be quantified by mea-
suring the change in the +25°C output voltage after temperature
excursions from +125°C to +25°C and from −40°C to +25°C.
Figure 13 displays the distribution of the AD1582/AD1583/
AD1584/AD1585 output voltage hysteresis.
80
70
60
50
40
30
20
10
0
–700
–450
–200
50
300
550
ppm
Figure 13. Output Voltage Hysteresis Distribution
SUPPLY CURRENT VS. TEMPERATURE
The quiescent current for the AD1582/AD1583/AD1584/
AD1585 varies slightly over temperature and input supply range.
Figure 14 illustrates the typical performance for the
AD1582/AD1583/AD1584/AD1585 reference when varying
both temperature and supply voltage. As is evident from
Figure 14, the AD1582/AD1583/AD1584/AD1585 supply
current increases only 1.0 μA/V, making this device extremely
attractive for use in applications where there can be wide
variations in supply voltage and a need to minimize power
dissipation.
100
80
60
TA = +85°C
TA = +25°C
40
TA = –40°C
20
0
3 4 5 6 7 8 9 10
VIN (V)
Figure 14. Typical Supply Current over Temperature
11
SUPPLY VOLTAGE
One of the ideal features of the AD1582/AD1583/AD1584/AD1585
is low supply voltage headroom. The parts can operate at supply
voltages as low as 200 mV above VOUT and up to 12 V. However,
if negative voltage is inadvertently applied to VIN with respect to
ground, or any negative transient >5 V is coupled to VIN, the
device can be damaged.
AC PERFORMANCE
To apply the AD1582/AD1583/AD1584/AD1585, it is important
to understand the effects of dynamic output impedance and
power supply rejection. In Figure 15, a voltage divider
is formed by the AD1582/AD1583/AD1584/ AD1585 output
impedance and by the external source impedance. Figure 16
shows the effect of varying the load capacitor on the reference
output. Power supply rejection ratio (PSRR) should be determined
when characterizing the ac performance of a series voltage
reference. Figure 17 shows a test circuit used to measure PSRR,
and Figure 18 demonstrates the ability of the AD1582/AD1583/
AD1584/AD1585 to attenuate line voltage ripple.
VLOAD DC
5V
10k
2 × VOUT
±2V 10k
2k
10k
×1
±100µA
1µF
DUT
5µF
Figure 15. Output Impedance Test Circuit
100
1µF CAP
10
AD1585
AD1582
1
0.1
10
100 1k 10k 100k
FREQUENCY (Hz)
Figure 16. Output Impedance vs. Frequency
1M
10V 10k
±200mV 10k
×1 5V ± 100mV
0.22µF
DUT
VOUT
0.22µF
Figure 17. Ripple Rejection Test Circuit
Rev. J | Page 12 of 16

12 Page





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