http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




Analog Devices Semiconductor Electronic Components Datasheet

AD5222 Datasheet

Increment/Decrement Dual Digital Potentiometer

No Preview Available !

AD5222 pdf
a
FEATURES
128-Position, 2-Channel
Potentiometer Replacement
10 k, 50 k, 100 k, 1 M
Very Low Power: 40 A Max
؎2.7 V Dual Supply Operation or
2.7 V to 5.5 V Single Supply Operation
Increment/Decrement Count Control
APPLICATIONS
Stereo Channel Audio Level Control
Mechanical Potentiometer Replacement
Remote Incremental Adjustment Applications
Instrumentation: Gain, Offset Adjustment
Programmable Voltage-to-Current Conversion
Line Impedance Matching
Increment / Decrement
Dual Digital Potentiometer
AD5222
FUNCTIONAL BLOCK DIAGRAM
VDD AD5222
U/D
UP/DOWN
COUNTER
DECODE
CS
MODE
DACSEL
CLK
GND
POR
DAC
SELECT
AND
ENABLE
UP/DOWN
COUNTER
DECODE
A1
W1
B1
A2
W2
B2
VSS
GENERAL DESCRIPTION
The AD5222 provides a dual channel, 128-position, digitally
controlled variable-resistor (VR) device. This device performs
the same electronic adjustment function as a potentiometer or
variable resistor. These products were optimized for instrument
and test equipment push-button applications. Choices between
bandwidth or power dissipation are available as a result of the
wide selection of end-to-end terminal resistance values.
The AD5222 contains two fixed resistors with wiper contacts that
tap the fixed resistor value at a point determined by a digitally
controlled up/down counter. The resistance between the wiper
and either end point of the fixed resistor provides a constant
resistance step size that is equal to the end-to-end resistance
divided by the number of positions (e.g., R STEP = 10 k/128 =
78 ). The variable resistor offers a true adjustable value of
resistance, between Terminal A and the wiper, or Terminal B
and the wiper. The fixed A-to-B terminal resistance of 10 k,
50 k, 100 k, or 1 Mhas a nominal temperature coefficient
of –35 ppm/°C.
The chip select CS, count CLK and U/D direction control inputs
set the variable resistor position. The MODE determines whether
both VRs are incremented together or independently. With
MODE at logic zero, both wipers are incremented UP or DOWN
without changing the relative settings between the wipers. Also,
the relative ratio between the wipers is preserved if either wiper
reaches the end of the resistor array. In the independent MODE
(Logic 1) only the VR determined by the DACSEL pin is changed.
DACSEL (Logic 0) changes RDAC 1. These inputs, which con-
trol the internal up/down counter, can be easily generated with
mechanical or push-button switches (or other contact closure
devices). This simple digital interface eliminates the need for
microcontrollers in front panel interface designs.
The AD5222 is available in the surface-mount (SO-14) package.
For ultracompact solutions, selected models are available in the
thin TSSOP-14 package. All parts are guaranteed to operate
over the extended industrial temperature range of –40°C to
+85°C. For 3-wire, SPI-compatible interface applications, see
the AD5203/AD5204/AD5206, AD7376, and AD8400/AD8402/
AD8403 products.
U/D
INCREMENT
5V
CS
U/D
CLK
VDD
A1
W1
B1
DACSEL
MODE
GND
A2
W2
B2
VSS
Figure 1. Typical Push-Button Control Application
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999


Analog Devices Semiconductor Electronic Components Datasheet

AD5222 Datasheet

Increment/Decrement Dual Digital Potentiometer

No Preview Available !

AD5222 pdf
AD5222–SPECIFICATIONS (VDD = 3 V ؎ 10% or 5 V ؎ 10%, VSS = 0 V, VA = +VDD, VB = 0 V, –40؇C < TA < +85؇C,
unless otherwise noted.)
Parameter
Symbol Condition
Min Typ1 Max Unit
DC CHARACTERISTICS RHEOSTAT MODE (Specifications Apply to All VRs)
Resistor Differential NL2
Resistor Nonlinearity2
R-DNL
R-INL
RWB, VA = NC
RWB, VA = NC
Nominal Resistor Tolerance
R VAB = VDD, Wiper = No Connect, TA = 25°C
Resistance Temperature Coefficient
Wiper Resistance3
RAB/T
RW
VAB = VDD, Wiper = No Connect
IW = VDD/R, VDD = 3 V or 5 V
Nominal Resistance Match
R/RO
CH 1 to 2, VAB = VDD, TA = 25°C
DC CHARACTERISTICS POTENTIOMETER DIVIDER MODE (Specifications Apply to All VRs)
Resolution
N
Integral Nonlinearity4
Differential Nonlinearity4
INL
INL
DNL
RAB = 10 k, 50 k, or 100 k
RAB = 1 M
Voltage Divider Temperature Coefficient VW/T
Full-Scale Error
VWFSE
Code = 40H
Code = 7FH
Zero-Scale Error
VWZSE
Code = 00H
RESISTOR TERMINALS
Voltage Range5
Capacitance6 A, B
Capacitance6 W
Common-Mode Leakage
VA, B, W
CA, B
CW
ICM
f = 1 MHz, Measured to GND, Code = 40H
f = 1 MHz, Measured to GND, Code = 40H
VA = VB = VW
DIGITAL INPUTS AND OUTPUTS
Input Logic High
Input Logic Low
Input Current
Input Capacitance6
VIH
VIL
IIL
CIL
VDD = 5 V/3 V
VDD = 5 V/3 V
VIN = 0 V or 5 V
–1 ±1/4 +1 LSB
–1 ±0.4 +1 LSB
–30 +30 %
–35 ppm/°C
45 100
0.2 1
%
7 Bits
–1 ±1/4 +1 LSB
–2 ±1/2 +2 LSB
–1 ±1/4 +1 LSB
20 ppm/°C
–1 –0.5 +0 LSB
0 0.5 1
LSB
VSS VDD V
45 pF
60 pF
1 nA
2.4/2.1
5
V
0.8/0.6 V
± 1 µA
pF
POWER SUPPLIES
Power Single-Supply Range
Power Dual-Supply Range
Positive Supply Current
Negative Supply Current
Power Dissipation7
Power Supply Sensitivity
VDD RANGE
VDD/SS RANGE
IDD
ISS
PDISS
PSS
VSS = 0 V
VIH = 5 V or VIL = 0 V
VSS = –2.5 V, VDD = +2.7 V
VIH = 5 V or VIL = 0 V, VDD = 5 V
2.7 5.5
±2.3 ±2.7
15 40
15 40
150 400
0.002 0.05
V
V
µA
µA
µW
%/%
DYNAMIC CHARACTERISTICS6, 8, 9
Bandwidth –3 dB
Total Harmonic Distortion
VW Settling Time
Resistor Noise Voltage
BW_10K
BW_50K
BW_100K
BW_1M
THDW
tS
eN_WB
RAB = 10 k, Code = 40H
RAB = 50 k, Code = 40H
RAB = 100 k, Code = 40H
RAB = 500 k, Code = 40H
VA = 1 V rms + 2 V dc, VB = 2 V dc, f = 1 kHz
RAB = 10 k, ± 1 LSB Error Band
RWB = 5 k, f = 1 kHz
INTERFACE TIMING CHARACTERISTICS (Applies to All Parts)6, 10
Input Clock Pulsewidth
CS to CLK Setup Time
CS Rise to CLK Hold Time
U/D to Clock Fall Setup Time
U/D to Clock Fall Hold Time
DACSEL to Clock Fall Setup Time
DACSEL to Clock Fall Hold Time
MODE to Clock Fall Setup Time
MODE to Clock Fall Hold Time
tCH, tCL
tCSS
tCSH
tUDS
tUDH
tDSS
tDSH
tMDS
tMDH
Clock Level High or Low
30
20
20
10
30
20
30
20
40
1000
180
78
7
0.005
2
14
kHz
kHz
kHz
kHz
%
µs
nVHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
1Typicals represent average readings at 25°C, VDD = 5 V.
2Resistor position nonlinearity error R-INL is the deviation from an ideal value measured between the maximum resistance and the minimum resistance wiper positions.
R-DNL measures the relative step change from ideal between successive tap positions. Parts are guaranteed monotonic. See Figure 22 test circuit.
3Wiper resistance is not measured on the RAB = 1 Mmodels.
4INL and DNL are measured at VW with the RDAC configured as a potentiometer divider similar to a voltage output D/A converter. V A = VDD and VB = 0 V. DNL
specification limits of ±1 LSB maximum are guaranteed monotonic operating conditions. See Figure 21 test circuit.
5Resistor Terminals A, B, W have no limitations on polarity with respect to each other.
6Guaranteed by design and not subject to production test.
7PDISS is calculated from (IDD × VDD). CMOS logic level inputs result in minimum power dissipation.
8Bandwidth, noise and settling time are dependent on the terminal resistance value chosen. The lowest R value results in the fastest settling time and highest bandwidth.
The highest R value results in the minimum overall power consumption.
9All dynamic characteristics use VDD = 5 V.
10See timing diagram for location of measured values. All input control voltages are specified with t R = tF = 2.5 ns (10% to 90% of +3 V) and timed from a voltage level
of 1.5 V. Switching characteristics are measured using both VDD = 5 V or VDD = 3 V.
Specifications subject to change without notice.
–2– REV. 0


Part Number AD5222
Description Increment/Decrement Dual Digital Potentiometer
Maker Analog Devices
Total Page 10 Pages
PDF Download
AD5222 pdf
Download PDF File


Buy Electronic Components




Related Datasheet

1 AD522 High Accuracy Data Acquisition Instrumentation Amplifier Analog Devices
Analog Devices
AD522 pdf
2 AD5220 Increment/Decrement Digital Potentiometer Analog Devices
Analog Devices
AD5220 pdf
3 AD5222 Increment/Decrement Dual Digital Potentiometer Analog Devices
Analog Devices
AD5222 pdf
4 AD5227 64-Position Up/Down Control Digital Potentiometer Analog Devices
Analog Devices
AD5227 pdf
5 AD5228 32-Position Manual Up/Down Control Potentiometer Analog Devices
Analog Devices
AD5228 pdf






Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components