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PDF AD5291 Data sheet ( Hoja de datos )
| Número de pieza | AD5291 | |
| Descripción | (AD5291 / AD5292) Digital Potentiometer | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AD5291 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
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256-/1024-Position, DigiPOT+ Potentiometers with
Maximum ±1% R-Tolerance Error and 20-TP Memory
AD5291/AD5292
FEATURES
Single-channel, 256-/1024-position resolution
20 kΩ nominal resistance
Calibrated ±1% nominal resistor tolerance (resistor
performance mode)
20-time programmable (20-TP) set-and-forget resistance
setting allows multiple time permanent programming
Rheostat mode temperature coefficient: 35 ppm/°C
Voltage divider temperature coefficient: 5 ppm/°C
+9 V to +33 V single-supply operation
±9 V to ±16.5 V dual-supply operation
SPI-compatible serial interface
Wiper setting readback
Power-on refreshed from 20-TP memory
APPLICATIONS
Mechanical potentiometer replacement
Instrumentation: gain and offset adjustment
Programmable voltage-to-current conversion
Programmable filters, delays, and time constants
Programmable power supply
Low resolution DAC replacement
Sensor calibration
VLOGIC
SCLK
SYNC
DIN
SDO
RDY
FUNCTIONAL BLOCK DIAGRAM
VDD RESET
POWER-ON
RESET
AD5291/
AD5292
SERIAL DATA
INTERFACE
RDAC
REGISTER
OTP
MEMORY
BLOCK
A
W
B
VSS EXT_CAP
Figure 1.
GND
GENERAL DESCRIPTION
The AD5291/AD5292, members of the Analog Devices, Inc.,
DigiPOT+ family of potentiometers, are single-channel, 256-/
1024-position digital potentiometers1 that combine industry
leading variable resistor performance with nonvolatile memory
(NVM) in a compact package. These devices are capable of
operating across a wide voltage range; supporting both dual
supply operation at ±10.5 V to ±16.5 V and single supply
operation at +21 V to +33 V, while ensuring less than 1% end-
to-end resistor tolerance (R-tolerance) error and offering
20-time programmable (20-TP) memory.
The guaranteed industry-leading low resistor tolerance error
feature simplifies open-loop applications as well as precision
calibration and tolerance matching applications.
1 The terms digital potentiometer and RDAC are used interchangeably.
The AD5291/AD5292 device wiper settings are controllable
through the SPI digital interface. Unlimited adjustments are
allowed before programming the resistance value into the
|20-TP memory. The AD5291/AD5292 do not require any
external voltage supply to facilitate fuse blow and there are
20 opportunities for permanent programming. During 20-TP
activation, a permanent blow fuse command freezes the wiper
position (analogous to placing epoxy on a mechanical trimmer).
The AD5291/AD5292 are available in a compact 14-lead TSSOP
package. The part is guaranteed to operate over the extended
industrial temperature range of −40°C to +105°C.
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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
©2009 Analog Devices, Inc. All rights reserved.
1 page  
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AD5291/AD5292
ELECTRICAL CHARACTERISTICS—AD5292
VDD = 21 V to 33 V, VSS = 0 V; VDD = 10.5 V to 16.5 V, VSS = −10.5 V to −16.5 V; VLOGIC = 2.7 V to 5.5 V, VA = VDD, VB = VSS,
−40°C < TA < +105°C, unless otherwise noted.
Table 3.
Parameter
DC CHARACTERISTICS—RHEOSTAT MODE
Resolution
Resistor Differential Nonlinearity2
Resistor Integral Nonlinearity2
Nominal Resistor Tolerance (R-Perf Mode3)
Nominal Resistor Tolerance (Normal Mode)
Resistance Temperature Coefficient4
Wiper Resistance
DC CHARACTERISTICS—POTENTIOMETER
DIVIDER MODE
Resolution
Differential Nonlinearity5
Integral Nonlinearity5
Voltage Divider Temperature
Coefficient4
Full-Scale Error
Zero-Scale Error
RESISTOR TERMINALS
Terminal Voltage Range6
Capacitance A, Capacitance B4
Symbol
N
R-DNL
R-INL
R-INL
∆RAB/RAB
∆RAB/RAB
(∆RAB/RAB)/∆T × 106
RW
N
DNL
INL
(∆VW/VW)/∆T × 106
VWFSE
VWZSE
VA, VB, VW
CA, CB
Capacitance W4
CW
Common-Mode Leakage Current4
DIGITAL INPUTS
Input Logic High4
Input Logic Low4
Input Current
Input Capacitance4
DIGITAL OUTPUTS (SDO and RDY)
Output High Voltage4
Output Low Voltage4
Tristate Leakage Current
Output Capacitance4
POWER SUPPLIES
Single-Supply Power Range
Dual-Supply Power Range
Positive Supply Current
Negative Supply Current
Logic Supply Range
Logic Supply Current
OTP Store Current4, 7
OTP Read Current4, 8
Power Dissipation9
Power Supply Rejection Ratio4
ICM
VIH
VIL
IIL
CIL
VOH
VOL
COL
VDD
VDD/VSS
IDD
ISS
VLOGIC
ILOGIC
ILOGIC_PROG
ILOGIC_FUSE_READ
PDISS
PSSR
Conditions
RWB, VA = NC
|VDD − VSS| = 26 V to 33 V
|VDD − VSS| = 21 V to 26 V
See Table 4
Code = half scale
Code = full scale
Code = zero scale
f = 1 MHz, measured to GND,
code = half scale
f = 1 MHz, measured to GND,
code = half scale
VA = VB = VW
JEDEC compliant
VLOGIC = 2.7 V to 5.5 V
VLOGIC = 2.7 V to 5.5 V
VIN = 0 V or VLOGIC
RPULL_UP = 2.2 kΩ to VLOGIC
RPULL_UP = 2.2 kΩ to VLOGIC
VSS = 0 V
VDD/VSS = ±16.5 V
VDD/VSS = ±16.5 V
VLOGIC = 5 V; VIH = 5 V or VIL = GND
VIH = 5 V or VIL = GND
VIH = 5 V or VIL = GND
VIH = 5 V or VIL = GND
∆VDD/∆VSS = ±15 V ± 10%
Min Typ1 Max
10
−1 +1
−2 +2
−3 +3
−1 0.5 +1
±20
35
60 100
10
−1 +1
−1.5 +1.5
5
−8 0
08
VSS VDD
85
65
±1
2.0
0.8
±1
5
VLOGIC − 0.4
−1
5
GND + 0.4
1
9 33
±9 ±16.5
0.1 2
−2 −0.1
2.7 5.5
1 10
25
25
8 110
0.025 0.08
Unit
Bits
LSB
LSB
LSB
%
%
ppm/°C
Ω
Bits
LSB
LSB
ppm/°C
LSB
LSB
V
pF
pF
nA
V
V
μA
pF
V
V
μA
pF
V
V
μA
μA
V
μA
mA
mA
μW
%/%
Rev. 0 | Page 5 of 28
5 Page 
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TYPICAL PERFORMANCE CHARACTERISTICS
1.0
–40°C
0.8 +25°C
+105°C
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
128 256 384 512 640 768 896 1024
CODE (Decimal)
Figure 6. R-INL in R-Perf Mode vs. Code vs. Temperature (AD5292)
0.6
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
0
–40°C
+25°C
+105°C
128 256 384 512 640 768 896 1024
CODE (Decimal)
Figure 7. R-DNL in R-Perf Mode vs. Code vs. Temperature (AD5292)
0.30
–40°C
+25°C
+105°C
0.25
0.20
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
–0.20
0
32 64 96 128 160 192 224 256
CODE (Decimal)
Figure 8. R-INL in R-Perf Mode vs. Code vs. Temperature (AD5291)
AD5291/AD5292
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
–0.02
–0.04
–0.06
0
–40°C
+25°C
+105°C
32 64 96 128 160 192 224 256
CODE (Decimal)
Figure 9. R-DNL in R-Perf Mode vs. Code vs. Temperature (AD5291)
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
0
–40°C
+25°C
+105°C
128 256 384 512 640 768 896 1024
CODE (Decimal)
Figure 10. R-INL in Normal Mode vs. Code vs. Temperature (AD5292)
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
–0.20
0
–40°C
+25°C
+105°C
128 256 384 512 640 768 896 1024
CODE (Decimal)
Figure 11. R-DNL in Normal Mode vs. Code vs. Temperature (AD5292)
Rev. 0 | Page 11 of 28
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet AD5291.PDF ] | |
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