AD5247BKS100-RL7 Analog Devices Inc, AD5247BKS100-RL7 Datasheet

AD5247BKS100-RL7

Manufacturer Part Number

AD5247BKS100-RL7

Description

IC DGTL POT 128POS SC70-6 T/R

Manufacturer

Analog Devices Inc

Datasheet

1.AD5247BKS50-R2.pdf (20 pages)

Specifications of AD5247BKS100-RL7

Rohs Status

RoHS non-compliant

Taps

128

Resistance (ohms)

100K

Number Of Circuits

Temperature Coefficient

45 ppm/°C Typical

Memory Type

Volatile

Interface

I²C, 2-Wire Serial

Voltage - Supply

2.7 V ~ 5.5 V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

SC-70-6, SC-88, SOT-363

Resistance In Ohms

100K

Number Of Elements

# Of Taps

128

Resistance (max)

100KOhm

Power Supply Requirement

Single

Interface Type

Serial (2-Wire/I2C)

Single Supply Voltage (typ)

3.3/5V

Dual Supply Voltage (typ)

Not RequiredV

Single Supply Voltage (min)

2.7V

Single Supply Voltage (max)

5.5V

Dual Supply Voltage (min)

Not RequiredV

Dual Supply Voltage (max)

Not RequiredV

Operating Temp Range

-40C to 125C

Operating Temperature Classification

Automotive

Mounting

Surface Mount

Pin Count

For Use With

AD5247EVAL - BOARD EVAL FOR AD5247

Lead Free Status / RoHS Status

Not Compliant

Current page: 1 of 20
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FEATURES

128 positions

End-to-end resistance: 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ

Ultracompact, SC70-6 (2 mm × 2.1 mm) package

Full read/write of wiper register

Power-on preset to midscale

Single-supply 2.7 V to 5.5 V

Low temperature coefficient: 45 ppm/°C

Low power, I

Wide operating temperature range: –40°C to +125°C

Available in Pb–free package

Evaluation board available

APPLICATIONS

Mechanical potentiometer replacement in new designs

Transducer adjustment of pressure, temperature, position,

RF amplifier-biasing

LCD brightness and contrast adjustment

Automotive electronics adjustment

Gain control and offset adjustment

GENERAL DESCRIPTION

The AD5247 provides a compact, 2 mm × 2.1 mm, packaged

solution for 128-position adjustment applications. This device

performs the same electronic adjustment function as a mechanical

potentiometer or a variable resistor. Available in four different

end-to-end resistance values (5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ),

these low temperature coefficient devices are ideal for high

accuracy and stability variable resistance adjustments.

The wiper settings are controllable through the I

digital interface, which can also be used to read back the present

wiper register control word. The 10 kΩ and 100 kΩ options each

Rev. B

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.

C-compatible interface

chemical, and optical sensors

= 3 μA typical

C-compatible

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

have three hard-coded slave address options available to allow

users access to three of these devices on one I

for a full list of slave address locations).

The resistance between the wiper and either end point of

the fixed resistor varies linearly with respect to the digital

code transferred into the RDAC latch. Note the terms digital

potentiometer, VR (variable resistor), and RDAC are used

interchangeably in this document.

Operating from a 2.7 V to 5.5 V power supply and consuming

3 μA allows the AD5247 to be used in portable battery-operated

applications.

128-Position I

SDA

SCL

FUNCTIONAL BLOCK DIAGRAM

Digital Potentiometer

C INTERFACE

WIPER

GND

Figure 1.

-Compatible

C bus (see Table 8

AD5247

www.analog.com

Related parts for AD5247BKS100-RL7

AD5247BKS100-RL7 Summary of contents

Page 1

FEATURES 128 positions End-to-end resistance: 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ Ultracompact, SC70 × 2.1 mm) package 2 I C-compatible interface Full read/write of wiper register Power-on preset to midscale Single-supply 2 5.5 V ...

Page 2

AD5247 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics—5 kΩ Version.................................. 3 Electrical Characteristics—10 kΩ, 50 kΩ, and 100 kΩ Versions.......................................................................................... 4 Timing ...

Page 3

SPECIFICATIONS ELECTRICAL CHARACTERISTICS—5 kΩ VERSION ± 10 ± 10 Table 1. Parameter DC CHARACTERISTICS—RHEOSTAT MODE 2 Resistor Differential Nonlinearity 2 Resistor Integral Nonlinearity 3 Nominal Resistor Tolerance ...

Page 4

AD5247 ELECTRICAL CHARACTERISTICS—10 kΩ, 50 kΩ, AND 100 kΩ VERSIONS ± 10 ± 10 Table 2. Parameter DC CHARACTERISTICS—RHEOSTAT MODE 2 Resistor Differential Nonlinearity 2 Resistor Integral ...

Page 5

TIMING CHARACTERISTICS—5 kΩ, 10 kΩ, 50 kΩ, AND 100 kΩ VERSIONS ± 10 ± 10 Table Parameter SCL Clock Frequency Bus Free Time ...

Page 6

AD5247 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter V to GND GND A W Terminal Current Bx Wx Pulsed 1 Continuous Digital ...

Page 7

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic GND 3 SCL 4 SDA AD5247 GND W 2 TOP VIEW 5 (Not to ...

Page 8

AD5247 TYPICAL PERFORMANCE CHARACTERISTICS 1.0 0.8 0 2.7V DD 0.4 0 5.5V DD –0.2 –0.4 –0.6 –0.8 –1 CODE (Decimal) Figure 4. R-INL vs. Code vs. Supply Voltages 0.5 0.4 ...

Page 9

T = –40° +85°C A 0.6 0.4 0 +25° +125° –0.2 –0.4 –0.6 –0.8 –1 CODE (Decimal) Figure 10. R-INL vs. ...

Page 10

AD5247 –40°C TO +85° – –40°C TO +125°C A – CODE (Decimal) Figure 16. ∆V /∆T vs. Code WB 0 0x40 –6 0x20 ...

Page 11

A-V = 5.5V DD CODE = 0x55 0.25 B-V = 5.5V DD CODE = 0x7F 0.20 C-V = 2.7V DD CODE = 0x55 0.15 D-V = 2.7V DD CODE = 0x7F 0.10 0. 10k 100k FREQUENCY (Hz) ...

Page 12

AD5247 TEST CIRCUITS Figure 27 to Figure 32 define the test conditions used in the Specifications section. DUT 1LSB = V+/ Figure 27. Potentiometer Divider Nonlinearity Error (INL, DNL) NO CONNECT ...

Page 13

... ACK ACK BY AD5247 FRAME 1 Figure 33. Writing to the RDAC Register R/W ACK BY AD5247 FRAME 1 Figure 34. Reading from the RDAC Register Model AD5247BKS50-RL7 AD5247BKSZ50-RL7 AD5247BKS100- AD5247BKSZ100- AD5247BKS100-RL7 AD5247BKSZ100-RL7 AD5247BKSZ100-1RL7 AD5247BKSZ100-2RL7 Rev Page Data Byte Data Byte ACK BY AD5247 FRAME 2 STOP BY DATA BYTE MASTER 9 ...

Page 14

AD5247 THEORY OF OPERATION The AD5247 is a 128-position, digitally-controlled variable resistor (VR) device. An internal power-on preset places the wiper at midscale during power-on, which simplifies the default condition recovery at power-up. PROGRAMMING THE VARIABLE RESISTOR Rheostat Operation The ...

Page 15

Typical device-to-device matching is process lot dependent and can vary ±30%. Because the resistance element is processed in thin film technology, the change in R temperature has a very low 45 ppm/°C temperature coefficient. PROGRAMMING THE POTENTIOMETER ...

Page 16

AD5247 LEVEL SHIFTING FOR BIDIRECTIONAL INTERFACE While most legacy systems can be operated at one voltage, a new component can be optimized at another voltage. When two systems operate the same signal at two different voltages, proper level shifting is ...

Page 17

LAYOUT AND POWER SUPPLY BYPASSING It is good practice to employ a compact, minimum lead-length layout design. The leads to the inputs should be as direct as pos- sible with minimum conductor length. Ground paths should have low resistance and ...

Page 18

... AD5247BKS10-R2 10 AD5247BKS10-RL7 10 1 AD5247BKSZ10-RL7 10 1 AD5247BKSZ10-1RL7 10 1 AD5247BKSZ10-2RL7 10 AD5247BKS50-R2 50 AD5247BKS50-RL7 50 1 AD5247BKSZ50-RL7 50 AD5247BKS100-R2 100 AD5247BKS100-RL7 100 AD5247BKSZ100-R2 100 1 AD5247BKSZ100-RL7 100 1 AD5247BKSZ100-1RL7 100 1 AD5247BKSZ100-2RL7 100 2 AD5247EVAL RoHS compliant part. 2 The evaluation board is shipped with the 10 kΩ R 2.20 2.00 1.80 2.40 1.35 ...

Page 19

NOTES Rev Page AD5247 ...

Page 20

AD5247 NOTES 2 Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Rights to use these components system, ...

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