|
|
PDF ADR5044 Data sheet ( Hoja de datos )
| Número de pieza | ADR5044 | |
| Descripción | Precision Micropower Shunt Mode Voltage References | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADR5044 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
Data Sheet
Precision Micropower Shunt Mode
Voltage References
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
FEATURES
Ultracompact SC70 and SOT-23 packages
Low temperature coefficient: 75 ppm/°C (maximum)
Pin compatible with LM4040/LM4050
Initial accuracy: ±0.1%
No external capacitor required
Wide operating current range: 50 µA to 15 mA
Extended temperature range: −40°C to +125°C
Qualified for automotive applications
APPLICATIONS
Portable, battery-powered equipment
Automotives
Power supplies
Data acquisition systems
Instrumentation and process control
Energy management
PIN CONFIGURATION
ADR5040/ADR5041/
ADR5043/ADR5044/
ADR5045
V+ 1
V– 2
3 NC
NOTES
1. NC = NO CONNECT.
2. PIN 3 MUST BE LEFT FLOATING OR
CONNECTED TO GROUND.
Figure 1. 3-Lead SC70 (KS) and 3-Lead SOT-23 (RT)
GENERAL DESCRIPTION
Designed for space-critical applications, the ADR5040/
ADR5041/ADR5043/ADR5044/ADR5045 are high precision
shunt voltage references, housed in ultrasmall SC70 and SOT-23
packages. These voltage references are multipurpose, easy-to-use
references that can be used in a vast array of applications. They
feature low temperature drift, an initial accuracy of better than
0.1%, and fast settling time.
Available in output voltages of 2.048 V, 2.5 V, 3.0 V, 4.096 V, and
5.0 V, the advanced design of the ADR5040/ADR5041/ADR5043/
ADR5044/ADR5045 eliminates the need for compensation by an
external capacitor, yet the references are stable with any capacitive
load. The minimum operating current increases from 50 µA to
a maximum of 15 mA. This low operating current and ease of use
make these references ideally suited for handheld, battery-powered
applications. This family of references has been characterized
over the extended temperature range of −40°C to +125°C. The
ADR5041W and the ADR5044W are qualified for automotive
applications and are available in a 3-lead SOT-23 package.
Table 1. Selection Table
Part
ADR5040A
ADR5040B
ADR5041A
ADR5041B
ADR5043A
ADR5043B
ADR5044A
ADR5044B
ADR5045A
ADR5045B
Voltage (V)
2.048
2.048
2.5
2.5
3.0
3.0
4.096
4.096
5.0
5.0
Initial
Accuracy (%)
±0.2
±0.1
±0.2
±0.1
±0.2
±0.1
±0.2
±0.1
±0.2
±0.1
Temperature
Coefficient
(ppm/°C)
100
75
100
75
100
75
100
75
100
75
Rev. B
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 T echnology Way, P .O. B ox 91 06, N orwood, M A 020 62-9106, U .S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2007–2012 Analog Devices, Inc. All rights reserved.
http://www.Datasheet4U.com
1 page  
Data Sheet
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
Parameter
TEMPERATURE COEFFICIENT1
Grade A
Grade B
OUTPUT VOLTAGE CHANGE vs. IIN
DYNAMIC OUTPUT IMPEDANCE
MINIMUM OPERATING CURRENT
VOLTAGE NOISE
TURN-ON SETTLING TIME
OUTPUT VOLTAGE HYSTERESIS
1 Guaranteed by design.
Symbol
TCVOUT
∆VR
(∆VR/∆IR)
IIN
eN
tR
∆VOUT_HYS
Conditions
–40°C < TA < +125°C
IIN = 50 µA to 1 mA
–40°C < TA < +125°C
IIN = 1 mA to 15 mA
–40°C < TA < +125°C
IIN = 50 µA to 15 mA
TA = 25°C
–40°C < TA < +125°C
IIN = 100 µA; 0.1 Hz to 10 Hz
IIN = 100 µA; 10 Hz to 10 kHz
CLOAD = 0 µF
IIN = 1 mA
ADR5045 ELECTRICAL CHARACTERISTICS
IIN = 50 µA to 15 mA, TA = 25°C, unless otherwise noted.
Table 6.
Parameter
OUTPUT VOLTAGE
Grade A
Grade B
INITIAL ACCURACY
Grade A
Symbol
VOUT
VOERR
Conditions
IIN = 100 µA
IIN = 100 µA
Grade B
TEMPERATURE COEFFICIENT1
Grade A
Grade B
OUTPUT VOLTAGE CHANGE vs. IIN
DYNAMIC OUTPUT IMPEDANCE
MINIMUM OPERATING CURRENT
VOLTAGE NOISE
TURN-ON SETTLING TIME
OUTPUT VOLTAGE HYSTERESIS
1 Guaranteed by design.
TCVOUT
∆VR
(∆VR/∆IR)
IIN
eN
tR
∆VOUT_HYS
–40°C < TA < +125°C
IIN = 50 µA to 1 mA
–40°C < TA < +125°C
IIN = 1 mA to 15 mA
–40°C < TA < +125°C
IIN = 50 µA to 15 mA
TA = 25°C
–40°C < TA < +125°C
IIN = 100 µA; 0.1 Hz to 10 Hz
IIN = 100 µA; 10 Hz to 10 kHz
CLOAD = 0 µF
IIN = 1 mA
Min
Min
4.990
4.995
–10
–5
Typ
10
10
0.7
4
5.4
240
56
40
Typ
5.000
5.000
10
10
0.8
4
6.6
280
70
40
Max
100
75
3
8
0.2
50
60
Max
5.010
5.005
+10
±0.2
+5
±0.1
100
75
4
8
0.2
50
60
Unit
ppm/°C
ppm/°C
mV
mV
Ω
µA
µA
µV rms
µV rms
µs
ppm
Unit
V
V
mV
%
mV
%
ppm/°C
ppm/°C
mV
mV
Ω
µA
µA
µV rms
µV rms
µs
ppm
Rev. B | Page 5 of 16
5 Page 
Data Sheet
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045
THEORY OF OPERATION
The ADR504x family uses the band gap concept to produce
a stable, low temperature coefficient voltage reference suitable
for high accuracy data acquisition components and systems. The
devices use the physical nature of a silicon transistor base-emitter
voltage in the forward-biased operating region. All such transistors
have approximately a −2 mV/°Ctemperature coefficient (TC),
making them unsuitable for direct use as a low temperature
coefficient reference. Extrapolation of the temperature charac-
teristic of any one of these devices to absolute zero (with the
collector current proportional to the absolute temperature),
however, reveals that its VBE approaches approximately the
silicon band gap voltage. Therefore, if a voltage develops with
an opposing temperature coefficient to sum the VBE, a zero
temperature coefficient reference results.
APPLICATIONS INFORMATION
The ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 are
a series of precision shunt voltage references. They are designed
to operate without an external capacitor between the positive
and negative terminals. If a bypass capacitor is used to filter the
supply, the references remain stable.
For a stable voltage, all shunt voltage references require an
external bias resistor (RBIAS) between the supply voltage and the
reference (see Figure 19). The RBIAS sets the current that flows
through the load (IL) and the reference (IIN). Because the load
and the supply voltage can vary, the RBIAS needs to be chosen
based on the following considerations:
RBIAS must be small enough to supply the minimum IINcurrent
to the ADR5040/ADR5041/ADR5043/ADR5044/ADR5045,
even when the supply voltage is at its minimum value and
the load current is at its maximum value.
RBIAS must be large enough so that IIN does not exceed 15 mA
when the supply voltage is at its maximum value and the
load current is at its minimum value.
Given these conditions, RBIAS is determined by the supply
voltage (VS), the ADR5040/ADR5041/ADR5043/ADR5044/
ADR5045 load and operating current (IL and IIN), and the
ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 output
voltage (VOUT).
R BIAS
VS VOUT
I L I IN
(3)
VS
RBIAS
IIN + IL
VOUT
IIN IL
ADR5040/ADR5041/
ADR5043/ADR5044/
ADR5045
Figure 19. Shunt Reference
Precision Negative Voltage Reference
The ADR5040/ADR5041/ADR5043/ADR5044/ADR5045 are
suitable for applications where a precise negative voltage is desired.
Figure 20 shows the ADR5045 configured to provide a negative
output. Caution should be exercised in using a low temperature
sensitive resistor to avoid errors from the resistor.
ADR5045
RBIAS
VOUT
–5V
VCC
Figure 20. Negative Precision Reference Configuration
Stacking the ADR504x for User-Definable Outputs
Multiple ADR504x parts can be stacked together to allow the
user to obtain a desired higher voltage. Figure 21a shows three
ADR5045 devices configured to give 15 V. The bias resistor,
RBIAS, is chosen using Equation 3, noting that the same bias current
flows through all the shunt references in series. Figure 21b shows
three ADR5045 devices stacked together to give −15 V. RBIAS is
calculated in the same manner as before. Parts of different voltages
can also be added together; that is, an ADR5041 and an ADR5045
can be added together to give an output of +7.5 V or −7.5 V, as
desired. Note, however, that the initial accuracy error is the sum
of the errors of all the stacked parts, as are the temperature
coefficient and output voltage change vs. input current.
VDD
RBIAS
ADR5045
ADR5045
ADR5045
ADR5045
ADR5045
+15V ADR5045
RBIAS
–15V
–VDD
(a) (b)
Figure 21. ±15 V Output with Stacked ADR5045 Devices
Rev. B | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ADR5044.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADR5040 | Precision Micropower Shunt Mode Voltage References | Analog Devices |
| ADR5041 | Precision Micropower Shunt Mode Voltage References | Analog Devices |
| ADR5043 | Precision Micropower Shunt Mode Voltage References | Analog Devices |
| ADR5044 | Precision Micropower Shunt Mode Voltage References | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |