AD5241 Analog Devices, AD5241 Datasheet

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AD5241

Manufacturer Part Number
AD5241
Description
Manufacturer
Analog Devices
Datasheet

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a
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.
*Nonvolatile digital potentiometer
I
REV. B
GENERAL DESCRIPTION
The AD5241/AD5242 provide a single-/dual-channel, 256-
position, digitally controlled variable resistor (VR) device. These
devices perform the same electronic adjustment function as a
potentiometer, trimmer, or variable resistor. Each VR offers a
completely programmable value of resistance between the A
Terminal and the wiper, or the B Terminal and the wiper.
For AD5242, the fixed A-to-B terminal resistance of 10 kΩ,
100 kΩ, or 1 MΩ has a 1% channel-to-channel matching
tolerance. The nominal temperature coefficient of both parts is
30 ppm/°C.
Wiper position programming defaults to midscale at system
power ON. Once powered, the VR wiper position is programmed
by an I
have available two extra programmable logic outputs that
enable users to drive digital loads, logic gates, LED drivers, and
analog switches in their system.
The AD5241/AD5242 are available in surface-mount (SOIC-14/-
16) packages and, for ultracompact solutions, TSSOP-14/-16
packages. All parts are guaranteed to operate over the
extended temperature range of –40°C to +105°C. For 3-wire,
SPI compatible interface applications, please refer to AD5200,
AD5201, AD5203, AD5204, AD5206, AD5231* , AD5232* ,
AD5235* , AD7376, AD8400, AD8402, and AD8403 products.
2
C is a registered trademark of Philips Corporation.
FEATURES
256 Positions
10 k , 100 k , 1 M
Low Tempco 30 ppm/ C
Internal Power ON Midscale Preset
Single-Supply 2.7 V to 5.5 V or
I
Extra Programmable Logic Outputs
Self-Contained Shutdown Feature
Extended Temperature Range –40 C to +105 C
APPLICATIONS
Multimedia, Video, and Audio
Communications
Mechanical Potentiometer Replacement
Instrumentation: Gain, Offset Adjustment
Programmable Voltage-to-Current Conversion
Line Impedance Matching
2
C Compatible Interface with Readback Capability
Dual-Supply
2
C compatible 2-wire serial data interface. Both parts
2.7 V for AC or Bipolar Operation
256-Position Digital Potentiometers
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
SHDN
GND
SDA
SCL
V
V
DD
SS
SHDN
GND
SDA
SCL
V
V
DD
SS
DECODE
FUNCTIONAL BLOCK DIAGRAM
ADDR
DECODE
1
ADDR
REGISTER 1
SERIAL INPUT REGISTER
A
1
RDAC
SERIAL INPUT REGISTER
A
AD5242
REGISTER 1
W
1
1
AD0
RDAC
AD0
B
W
1
1
AD5241/AD5242
B
AD1
1
AD1
I
8
2
AD5241
C
A
8
REGISTER 2
2
®
RDAC
© Analog Devices, Inc., 2002
W
REGISTER 2
2
Compatible
O
B
1
2
PWR-ON
O
RESET
2
PWR-ON
RESET
www.analog.com
REGISTER
O
1
O
2

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AD5241 Summary of contents

Page 1

... LED drivers, and analog switches in their system. The AD5241/AD5242 are available in surface-mount (SOIC-14/- 16) packages and, for ultracompact solutions, TSSOP-14/-16 packages. All parts are guaranteed to operate over the extended temperature range of – ...

Page 2

... AD5241/AD5242–SPECIFICATIONS 100 VERSION Parameter DC CHARACTERISTICS, RHEOSTAT MODE (Specifications apply to all VRs.) 2 Resistor Differential Nonlinearity 2 Resistor Integral Nonlinearity Nominal Resistor Tolerance Resistance Temperature Coefficient R Wiper Resistance DC CHARACTERISTICS, POTENTIOMETER DIVIDER MODE (Specifications apply to all VRs.) Resolution 3 Differential Nonlinearity 3 Integral Nonlinearity ...

Page 3

... Conditions SCL After this period, the first clock 2 pulse is generated –3– AD5241/AD5242 1 Min Typ Max Unit 0 400 kHz µs 1.3 600 ns µs 1.3 µs 0.6 50 600 ns 900 ns 100 ns 300 ns 300 and ...

Page 4

... AD5242BR1M 2 AD5242BRU1M-REEL7 2 NOTES The AD5241/AD5242 die size is 69 mil × 78 mil, 5,382 sq. mil. Contains 386 transistors for each channel. Patent Number 5495245 applies TSSOP packaged units are only available in 1,000-piece quantity Tape and Reel. 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 ...

Page 5

... AD5241 TOP VIEW DD (Not to Scale) SHDN SCL SDA CONNECT AD5241 PIN FUNCTION DESCRIPTIONS Pin Mnemonic Description 1 A Resistor Terminal Wiper Terminal Resistor Terminal Positive power supply, specified for opera- DD tion from 2 ...

Page 6

... AD5241/AD5242 SDA t 1 SCL P S Data of AD5241/AD5242 is accepted from the AD1 AD0 R/W SLAVE ADDRESS BYTE where Start Condition P = Stop Condition A = Acknowledge X = Don’t Care AD1, AD0 = Package pin programmable address bits. Must be matched with the logic states at Pins AD1 and AD0. ...

Page 7

... CODE – Decimal TPC 2. RINL vs. Code 0.25 0. +2.7V/0V, +5.5V/0V –0.13 –0. 128 CODE – Decimal TPC 3. DNL vs. Code REV. B Typical Performance Characteristics–AD5241/AD5242 0. +2. +5. 2.7V DD 0.25 –0.25 2.7V –0.50 160 192 224 256 10000 V = +2. +5.5V DD ...

Page 8

... AD5241/AD5242 0.1 0.01 0.001 0 –40 –20 20 TEMPERATURE – C TPC 7. Shutdown Current vs. Temperature 70 60 10M VERSION 50 10k VERSION 40 100k VERSION –10 –20 – 128 CODE – Decimal TPC Potentiometer Mode Tempco WB 120 100 100k VERSION –20 10k VERSION – ...

Page 9

... Both parts have an internal power ON preset that places the wiper in midscale during power-on, which simplifies the fault condition recovery at power-up. In addition, the shutdown SHDN Pin of AD5241/AD5242 places the RDAC in an almost zero power consumption state where Terminal A is open circuited and Wiper W is connected to Terminal B, resulting in only leakage current being consumed in the VR structure ...

Page 10

... The RDACs are connected to this bus as slave devices. WA Referring to Figures 2 and 3, the first byte of AD5241/AD5242 is a Slave Address Byte. It has a 7-bit slave address and an R/W Bit. The 5 MSBs are 01011 and the following two bits are Output State determined by the state of the AD0 and AD1 Pins of the device ...

Page 11

... DATA IN FRAME 2 OF WRITE MODE Figure 7. Output Stage of Logic Output O ADDITIONAL PROGRAMMABLE LOGIC OUTPUT AD5241/AD5242 feature additional programmable logic out- puts, O and O that can be used to drive digital load, analog 1 2, switches, and logic gates. They can also be used as self-con- tained shutdown as preset to logic 0 feature which will be explained later ...

Page 12

... AD5241/AD5242 Users can also activate O and O in three different ways with out affecting the wiper settings. 1. Start, Slave Address Byte, Acknowledge, Instruction Byte with O and O specified, Acknowledge, Stop Complete the write cycle with Stop, then Start, Slave Address Byte, Acknowledge, Instruction Byte with O fied, Acknowledge, Stop ...

Page 13

... V ]/ MS1 MS2 Test Circuit 8. Incremental ON Resistance 10 Test Circuit 9. Common-Mode Leakage Current V OUT –13– AD5241/AD5242 5V OP279 V OUT OFFSET GND A DUT B OFFSET BIAS Test Circuit 6. Noninverting Gain A +15V W V DUT IN OP42 V OUT GND B 2 ...

Page 14

... V, +5.5 V AD5201 1 3-Wire AD5220 1 5.5 V Up/Down ± +28 V AD7376 1 3-Wire ± +5.5 V AD5200 1 3-Wire AD8400 1 5.5 V 3-Wire ± +5.5 V AD5241 1 2-Wire ±2.75 V, +5.5 V 3-Wire AD5231 1 ± +15 V AD5260 1 3-Wire ± +5.5 V AD5207 2 3-Wire ± +5.5 V AD5222 2 Up/Down AD8402 2 5.5 V 3-Wire ± ...

Page 15

... COPLANARITY 0.25 (0.0098) 8 0.10 (0.0039) 0 1.27 (0.0500) 0.40 (0.0157) CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN COMPLIANT TO JEDEC STANDARDS MS-012 AC –15– AD5241/AD5242 (RU-16) Dimensions shown in millimeters 5.10 5.00 4.90 9 6.40 BSC 8 1.20 MAX 8 0 0.20 SEATING PLANE 0 ...

Page 16

... AD5241/AD5242 Revision History Location 8/02—Data Sheet changed from REV REV. B. Additions to FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Changes to GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Changes to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Changes to ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Additions to ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Changes to TPC 8 and TPC Changes to READBACK RDAC VALUE section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Changes to ADDITIONAL PROGRAMMABLE LOGIC OUTPUT section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Added SELF-CONTAINED SHUTDOWN section ...

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