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PDF ADR510 Data sheet ( Hoja de datos )
| Número de pieza | ADR510 | |
| Descripción | 1.0 V Precision Low Noise Shunt Voltage Reference | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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FEATURES
Precision 1.000 V Voltage Reference
Ultracompact 3 mm ؋ 3 mm SOT-23 Package
No External Capacitor Required
Low Output Noise: 4 V p-p (0.1 Hz to 10 Hz)
Initial Accuracy: ؎0.35% Max
Temperature Coefficient: 70 ppm/؇C Max
Operating Current Range: 100 A to 10 mA
Output Impedance: 0.3 ⍀ Max
Temperature Range: –40؇C to +85؇C
APPLICATIONS
Precision Data Acquisition Systems
Battery-Powered Equipment:
Cellular Phone, Notebook Computer, PDA,
and GPS
3 V/5 V, 8-/12-Bit Data Converters
Portable Medical Instruments
Industrial Process Control Systems
Precision Instruments
1.0 V Precision Low Noise
Shunt Voltage Reference
ADR510
PIN CONFIGURATION
3-Lead SOT-23
V+ 1
V– 2
ADR510
3 TRIM/NC
ADR510
Model
ADR510ART-REEL7
Output
Voltage
(VO)
1.000
Initial
Accuracy
(mV) (%)
3.5 0.35
Temperature
Coefficient
(ppm/؇C)
70
GENERAL DESCRIPTION
Designed for space critical applications, the ADR510 is a low
voltage (1.000 V), precision shunt-mode voltage reference in the
ultracompact (3 mm ϫ 3 mm) SOT-23 package. The ADR510
features low temperature drift (70 ppm/ЊC), high accuracy
(Ϯ0.35%), and ultralow noise (4 V p-p) performance.
The ADR510’s advanced design eliminates the need for an
external capacitor, yet it is stable with any capacitive load. The
minimum operating current increases from a scant 100 A to a
maximum of 10 mA. This low operating current and ease of
use make the ADR510 ideally suited for hand-held battery-
powered applications.
A TRIM terminal is available on the ADR510 to provide adjust-
ment of the output voltage over Ϯ0.5% without affecting the
temperature coefficient of the device. This feature provides
users with the flexibility to trim out any system errors.
IL + IQ
VS
RBIAS
ADR510
IQ
IL
VOUT = 1.0V
COUT
(OPTIONAL)
VS – VOUT
RBIAS = IL + IQ
Figure 1. Typical Operating Circuit
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. 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 companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.
1 page  
ADR510
Adjustable Precision Voltage Source
The ADR510, combined with a precision low input bias op amp
such as the AD8610, can be used to output a precise adjustable
voltage. Figure 2 illustrates the implementation of this application
using the ADR510.
The output of the op amp, VOUT, is determined by the gain of the
circuit, which is completely dependent on Resistors R2 and R1.
VOUT
=1+
R2
R1
(4)
An additional capacitor in parallel with R2 can be added to filter
out high frequency noise. The value of C2 is dependent on the
value of R2.
VCC
RBIAS
1.0V
AD8610
VOUT = (1 + R2/R1)
ADR510
R2
R1 C2 (OPTIONAL)
Figure 2. Adjustable Precision Voltage Source
Output Voltage Trim
Using a mechanical or digital potentiometer, the output voltage
of the ADR510 can be trimmed ± 0.5%. The circuit in Figure 3
illustrates how the output voltage can be trimmed, using a 10 kΩ
potentiometer. Note that trimming using other resistor values
may not produce an accurate output from the ADR510.
VCC
RBIAS
ADR510
R1
470k⍀
VOUT
POT
10k⍀
Figure 3. Output Voltage Trim
Using the ADR510 with Precision Data Converters
The compact ADR510 and its low minimum operating current
requirement make it ideal for use in battery-powered portable
instruments, such as the AD7533 CMOS multiplying DAC, that
use precision data converters.
Figure 4 shows the ADR510 serving as an external reference to
the AD7533, a CMOS multiplying DAC. Such a DAC requires
a negative voltage input in order to provide a positive output range.
In this application, the ADR510 is supplying a –1.0 V reference
to the REF input of the AD7533.
ADR510
R2
0
MSB
VDD
1
9
LSB
AD7533
1
GN
32 1
15
–VDD
VOUT = 0V TO 1.0V
Figure 4. ADR510 as a Reference for a 10-Bit
CMOS DAC (AD7533)
Precise Negative Voltage Reference
The ADR510 is suitable for use in applications where a precise
negative voltage reference is desired, including the application
detailed in Figure 4.
Figures 5 shows the ADR510 configured to provide a –1.0 V output.
ADR510
R1
–1.0V
–VDD
Figure 5. Precise –1.0 V Reference Configuration
Since the ADR510 characteristics resemble those of a Zener
diode, the cathode shown in Figure 5 will be 1.0 V higher with
respect to the anode (V+ with respect to V– on the ADR510
package). Since the cathode of the ADR510 is tied to ground,
the anode must be –1.0 V.
R1 in Figure 5 should be chosen so that 100 µA to 10 mA is
provided to properly bias the ADR510.
R1 = VDD
I
(5)
The R1 resistor should be chosen so that power dissipation is at
a minimum. An ideal resistor value can be determined through
manipulation of Equation 5.
REV. 0
–5–
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ADR510.PDF ] | |
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