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PDF AD586 Data sheet ( Hoja de datos )
| Número de pieza | AD586 | |
| Descripción | High Precision 5 V Reference | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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FEATURES
Laser trimmed to high accuracy
5.000 V ±2.0 mV (M grade)
Trimmed temperature coefficient
2 ppm/°C max, 0°C to 70°C (M grade)
5 ppm/°C max, −40°C to +85°C (B and L grades)
10 ppm/°C max, −55°C to +125°C (T grade)
Low noise, 100 nV/√Hz
Noise reduction capability
Output trim capability
MIL-STD-883-compliant versions available
Industrial temperature range SOICs available
Output capable of sourcing or sinking 10 mA
GENERAL DESCRIPTION
The AD586 represents a major advance in state-of-the-art
monolithic voltage references. Using a proprietary ion-implanted
buried Zener diode and laser wafer trimming of high stability
thin-film resistors, the AD586 provides outstanding perform-
ance at low cost.
The AD586 offers much higher performance than most other
5 V references. Because the AD586 uses an industry-standard
pinout, many systems can be upgraded instantly with the
AD586.
The buried Zener approach to reference design provides lower
noise and drift than band gap voltage references. The AD586
offers a noise reduction pin that can be used to further reduce
the noise level generated by the buried Zener.
The AD586 is recommended for use as a reference for 8-, 10-,
12-, 14-, or 16-bit DACs that require an external precision
reference. The device is also ideal for successive approximation
or integrating ADCs with up to 14 bits of accuracy and, in
general, can offer better performance than the standard on-chip
references.
The AD586J, AD586K, AD586L, and AD586M are specified for
operation from 0°C to 70°C; the AD586A and AD586B are
specified for −40°C to +85°C operation; and the AD586S and
AD586T are specified for −55°C to +125°C operation.
High Precision
5 V Reference
AD586
The AD586J, AD586K, AD586L, and AD586M are available in
an 8-lead PDIP; the AD586J, AD586K, AD586L, AD586A, and
AD586B are available in an 8-lead SOIC package; and the
AD586J, AD586K, AD586L, AD586S, and AD586T are
available in an 8-lead CERDIP package.
VIN NOISE REDUCTION
28
RZ1 RS
RZ2
AD586
A1
RF
RI
6 VOUT
RT
5 TRIM
4
GND
NOTES
1. PINS 1, 3, AND 7 ARE INTERNAL TEST POINTS.
MAKE NO CONNECTIONS TO THESE POINTS.
Figure 1.
PRODUCT HIGHLIGHTS
1. Laser trimming of both initial accuracy and temperature
coefficients results in very low errors over temperature
without the use of external components. The AD586M has
a maximum deviation from 5.000 V of ±2.45 mV between
0°C and 70°C, and the AD586T guarantees ±7.5 mV
maximum total error between −55°C and +125°C.
2. For applications requiring higher precision, an optional
fine-trim connection is provided.
3. Any system using an industry-standard pinout reference
can be upgraded instantly with the AD586.
4. Output noise of the AD586 is very low, typically 4 µV p-p.
A noise reduction pin is provided for additional noise
filtering using an external capacitor.
5. The AD586 is available in versions compliant with
MIL-STD-883. Refer to the Analog Devices Military
Products Databook or the current AD586/883B data sheet
for detailed specifications.
Rev. G
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. Trademarks and
registered trademarks are the property of their respective owners.
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 © 2005 Analog Devices, Inc. All rights reserved.
1 page  
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Rating
VIN to Ground
Power Dissipation (25°C)
36 V
500 mW
Storage Temperature
−65°C to +150°C
Lead Temperature (Soldering, 10 sec) 300°C
Package Thermal Resistance
θJC
θJA
Output Protection
22°C/W
110°C/W
Output safe for indefinite
short to ground or VIN.
AD586
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
Rev. G | Page 5 of 16
5 Page 
5 V REFERENCE WITH MULTIPLYING
CMOS DACs OR ADCs
The AD586 is ideal for applications with 10- and 12-bit
multiplying CMOS DACs. In the standard hookup, as shown
in Figure 20, the AD586 is paired with the AD7545 12-bit
multiplying DAC and the AD711 high speed BiFET op amp.
The amplifier DAC configuration produces a unipolar 0 V to
−5 V output range. Bipolar output applications and other
operating details can be found in the individual product data
sheets.
+15V
2
VIN
AD586
VOUT 6
TRIM 5
GND
4
+15V
R2
68Ω
18
VDD
19 VREF
20
RFB
OUT 1 1
10kΩ
AD7545K AGND 2
DGND
3
DB11 TO DB0
C1 +15V
33pF 0.1µF
27
AD711K 6
VOUT
34
0 V TO –5V
0.1µF
–15V
Figure 20. Low Power 12-Bit CMOS DAC Application
The AD586 can also be used as a precision reference for multi-
ple DACs. Figure 21 shows the AD586, the AD7628 dual DAC,
and the AD712 dual op amp hooked up for single-supply opera-
tion to produce 0 V to −5 V outputs. Because both DACs are on
the same die and share a common reference and output op
amps, the DAC outputs will exhibit similar gain TCs.
+15V
2
VIN
VOUT 6
AD586
GND
4
+15V
VREFA
4
17 3
RFB A
OUT A
DAC A
2
DATA
INPUTS
14 DB0
AD7628
7 DB7
4
VREFB
DAC B
AGND
1
RFB B
19
OUT B
20
DGND
5
AD712
VOUT A =
0 TO –5V
VOUT B =
0 TO –5V
Figure 21. AD586 as a 5 V Reference for a CMOS
STACKED PRECISION REFERENCES FOR
MULTIPLE VOLTAGES
Often, a design requires several reference voltages. Three
AD586s can be stacked, as shown in Figure 22, to produce
5.000 V, 10.000 V, and 15.000 V outputs. This scheme can be
extended to any number of AD586s, provided the maximum
load current is not exceeded. This design provides the addi-
tional advantage of improved line regulation on the 5.0 V
output. Changes in VIN of 18 V to 50 V produce output changes
that are below the noise level of the references.
AD586
22V TO 46V
2
VIN
AD586 VOUT 6
TRIM 5
GND
4
2
VIN
AD586 VOUT 6
TRIM 5
GND
4
2
VIN
AD586 VOUT 6
TRIM 5
GND
4
10kΩ
10kΩ
15V
10kΩ
10V
5V
Figure 22. Multiple AD586s Stacked for Precision 5 V, 10 V, and 15 V Outputs
PRECISION CURRENT SOURCE
The design of the AD586 allows it to be easily configured as a
current source. By choosing the control resistor RC in Figure 23,
the user can vary the load current from the quiescent current
(typically, 2 mA) to approximately 10 mA. The compliance volt-
age of this circuit varies from about 5 V to 21 V, depending on
the value of VIN.
+VIN
2
VIN
AD586
GND
4
VOUT 6
RC
(500Ω MIN)
IL
=
5V
RC
+
IBIAS
Figure 23. Precision Current Source
PRECISION HIGH CURRENT SUPPLY
For higher currents, the AD586 can easily be connected to a
power PNP or power Darlington PNP device. The circuit in
Figure 24 and Figure 25 can deliver up to 4 amps to the load.
The 0.1 µF capacitor is required only if the load has a significant
capacitive component. If the load is purely resistive, improved
high frequency supply rejection results can be obtained by
removing the capacitor.
Rev. G | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AD586.PDF ] | |
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