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PDF AD5165 Data sheet ( Hoja de datos )
| Número de pieza | AD5165 | |
| Descripción | 256-Position/ Ultralow Power 1.8 V Logic-Level Digital Potentiometer | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AD5165 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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256-Position, Ultralow Power
1.8 V Logic-Level Digital Potentiometer
AD5165
FEATURES
Ultralow standby power IDD = 50 nA typical
256-position
End-to-end resistance 100 kΩ
Logic high voltage 1.8 V
Power supply 2.7 V to 5.5 V
Low temperature coefficient 35 ppm/°C
Compact thin 8-lead TSOT-8 (2.9 mm × 2.8 mm) package
Simple 3-wire digital interface
Wide operating temperature −40°C to +125°C
Pin-to-pin compatible to AD5160 with CS inverted
APPLICATIONS
Battery-operated electronics adjustment
Remote utilities meter adjustment
Mechanical potentiometer replacement
Transducer circuit adjustment
Automotive electronics adjustment
Gain control and offset adjustment
System calibration
VCXO adjustment
GENERAL OVERVIEW
The AD5165 provides a compact 2.9 mm × 2.8 mm packaged
solution for 256-position adjustment applications. These devices
perform the same electronic adjustment function as mechanical
potentiometers or variable resistors, with enhanced resolution,
solid-state reliability, and superior low temperature coefficient
performance. The AD5165’s supply voltage requirement is 2.7 V
to 5.5 V, but its logic voltage requirement is 1.8 V to VDD. The
AD5165 consumes very low quiescent power during standby
mode and is ideal for battery-operated applications.
Wiper settings are controlled through a simple 3-wire interface.
The interface is similar to the SPI® digital interface except for the
inverted chip-select function that minimizes logic power con-
sumption in the idling state. The resistance between the wiper
and either endpoint of the fixed resistor varies linearly with
respect to the digital code transferred into the wiper register.
Operating from a 2.7 V to 5.5 V power supply and consuming
less than 50 nA typical standby power allows use in battery-
operated portable or remote utility device applications.
FUNCTIONAL BLOCK DIAGRAM
VDD
CS
SDI
CLK
3-WIRE
INTERFACE
A
W
WIPER
REGISTER
B
GND
Figure 1.
PIN CONFIGURATION
W1
8A
VDD 2 AD5165 7 B
GND 3
TOP VIEW
(Not to Scale)
6
CS
CLK 4
5 SDI
Figure 2.
TYPICAL APPLICATION
VOH = 1.8V MIN
3.3V
DIGITAL
CONTROL
LOGIC OR
MICRO
5V
VDD
AD5165
CS
CLK
VA
WIDE TERMINAL
VW VOLTAGE RANGE:
VB 0V < VA,VB,VW < 5V
SDI GND
Figure 3.
Note:
The terms digital potentiometer, RDAC, and VR are used interchangeably.
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. 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: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
1 page  
AD5165
ABSOLUTE MAXIMUM RATINGS
TA = +25°C, unless otherwise noted.1, 2
Table 3.
Parameter
VDD to GND
VA, VB, VW to GND
Maximum Current
IWB, IWA Pulsed
IWB Continuous (RWB ≤ 1 kΩ, A open)2
IWA Continuous (RWA ≤ 1 kΩ, B open)2
Digital Inputs and Output Voltage to GND
Operating Temperature Range
Maximum Junction Temperature (TJMAX)
Storage Temperature
Lead Temperature (Soldering, 10 – 30 sec)
Thermal Resistance2 θJA: TSOT-8
Value
–0.3 V to +7 V
VDD
±20 mA
±5 mA
±5 mA
0 V to +7 V
–40°C to +125°C
150°C
–65°C to +150°C
245°C
200°C/W
1 Maximum terminal current is bounded by the maximum current handling
of the switches, maximum power dissipation of the package, and maximum
applied voltage across any two of the A, B, and W terminals at a given
resistance.
2 Package power dissipation = (TJMAX − TA)/θJA.
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. 0 | Page 5 of 16
5 Page 
TEST CIRCUITS
Figure 27 to Figure 33 illustrate the test circuits that define the test conditions used in the product specification tables.
AD5165
DUT
A
W
V+
B
V+ = VDD
1LSB = V+/2N
VMS
VIN
OFFSET
GND
2.5V
DUT
A
W
B
+15V
AD8610
–15V
VOUT
Figure 27. Test Circuit for Potentiometer Divider Nonlinearity Error
(INL, DNL)
NO CONNECT
DUT
AW
B
IW
VMS
Figure 28. Test Circuit for Resistor Position Nonlinearity Error
(Rheostat Operation; R-INL, R-DNL)
Figure 31. Test Circuit for Gain vs. Frequency
DUT
W
B
RSW =
0.1V
ISW
CODE = 0x00
ISW 0.1V
GND TO VDD
Figure 32. Test Circuit for Incremental ON Resistance
VMS2
DUT
A
W
B
IW = VDD/RNOMINAL
VW
RW = [VMS1 – VMS2]/IW
VMS1
Figure 29. Test Circuit for Wiper Resistance
NC
DUT
VDD
A
W
GND B
ICM
VCM
NC NC = NO CONNECT
Figure 33. Test Circuit for Common-Mode Leakage Current
VA
VDD A
V+ W
B
( )V+= VDD 10%
PSRR (dB) = 20 LOG
∆VMS
∆V DD
PSS (%/%) = ∆VMS%
∆VDD%
VMS
Figure 30. Test Circuit for Power Supply Sensitivity (PSS, PSSR)
Rev. 0 | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AD5165.PDF ] | |
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