EVAL-AD5232SDZ Analog Devices, EVAL-AD5232SDZ Datasheet

EVAL-AD5232SDZ

Manufacturer Part Number

EVAL-AD5232SDZ

Description

Digital Potentiometer Development Tools EVALUATION BOARD

Manufacturer

Analog Devices

Series

AD5232r

Datasheet

1.EVAL-AD5232SDZ.pdf (24 pages)

Specifications of EVAL-AD5232SDZ

Rohs

yes

Product

Evaluation Boards

Tool Is For Evaluation Of

AD5232

Resistance

10 kOhms/50 kOhms/100 kOhms

Operating Supply Voltage

2.7 V

Interface Type

SPI

Maximum Operating Temperature

+ 85 C

Factory Pack Quantity

For Use With

Sim DAC Web Tool

Current page: 1 of 24
Download datasheet (917Kb)

FEATURES

Dual-channel, 256-position resolution

10 kΩ, 50 kΩ, and 100 kΩ nominal terminal resistance

Nonvolatile memory maintenance of wiper settings

Predefined linear increment/decrement instructions

Predefined ±6 dB step log taper increment/decrement

SPI-compatible serial interface

Wiper settings and EEMEM readback

3 V to 5 V single-supply operation

±2.5 V dual-supply operation

14 bytes of general-purpose user EEMEM

Permanent memory write protection

100-year typical data retention (T

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

GENERAL DESCRIPTION

The AD5232 device provides a nonvolatile, dual-channel,

digitally controlled variable resistor (VR) with 256-position

resolution. This device performs the same electronic adjustment

function as a mechanical potentiometer with enhanced resolution,

solid state reliability, and superior low temperature coefficient

performance. The versatile programming of the AD5232, per-

ormed via a microcontroller, allows multiple modes of operation

and adjustment.

In the direct program mode, a predetermined setting of the RDAC

registers (RDAC1 and RDAC2) can be loaded directly from the

microcontroller. Another important mode of operation allows

the RDACx register to be refreshed with the setting previously

stored in the corresponding EEMEM register (EEMEM1 and

EEMEM2). When changes are made to the RDACx register to

establish a new wiper position, the value of the setting can be

saved into the EEMEMx register by executing an EEMEM save

operation. After the settings are saved in the EEMEMx register,

these values are automatically transferred to the RDACx register

to set the wiper position at system power-on. Such operation is

enabled by the internal preset strobe. The preset strobe can also

be accessed externally.

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.

Data Sheet

instructions

= 55°C)

Dual 256-Position Digital Potentiometer

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

Tel: 781.329.4700

Fax: 781.461.3113

All internal register contents can be read via the serial data

output (SDO). This includes the RDAC1 and RDAC2 registers,

the corresponding nonvolatile EEMEM1 and EEMEM2 registers,

and the 14 spare USER EEMEM registers that are available for

constant storage.

The basic mode of adjustment is the increment and decrement

command instructions that control the wiper position setting

be moved up or down one step of the nominal resistance between

Terminal A and Terminal B. This step adjustment linearly changes

the wiper to Terminal B resistance (R

of the device’s end-to-end resistance (R

logarithmic changes in wiper setting, a left/right shift command

instruction adjusts the levels in ±6 dB steps, which can be useful

for audio and light alarm applications.

The AD5232 is available in a thin, 16-lead TSSOP package.

All parts are guaranteed to operate over the extended industrial

temperature range of −40°C to +85°C. An evaluation board, the

EVAL-AD5232-10EBZ, is available.

SDO

CLK

RDY

SDI

POWER-ON

INTERFACE

CONTROL

EEMEM

RESET

FUNCTIONAL BLOCK DIAGRAM

SERIAL

DECODE

ADDR

Nonvolatile Memory,

GND

Figure 1.

14 BYTES

EEMEM1

EEMEM2

EEMEM

RDAC1

RDAC2

USER

) by one position segment

). For exponential/

AD5232

RDAC1

RDAC2

AD5232

www.analog.com

Related parts for EVAL-AD5232SDZ

EVAL-AD5232SDZ Summary of contents

Page 1

... The AD5232 is available in a thin, 16-lead TSSOP package. All parts are guaranteed to operate over the extended industrial temperature range of −40°C to +85°C. An evaluation board, the EVAL-AD5232-10EBZ, is available. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. ...

Page 2

... Application Programming Examples ...................................... 20 Equipment Customer Start-up Sequence for a PCB Calibrated Unit with Protected Settings................ 21 Flash/EEMEM Reliability.......................................................... 21 Evaluation Board ........................................................................ 21 Outline Dimensions ....................................................................... 22 Ordering Guide .......................................................................... 22 Changes to CS Rise to RDY Fall Time Parameter, Table 2 ..........5 Changes to Figure 2 and Figure 3....................................................6 Changes to Figure 24 ...

Page 3

Data Sheet SPECIFICATIONS ELECTRICAL CHARACTERISTICS—10 kΩ, 50 kΩ, 100 kΩ VERSIONS ± 10 ± 10% and Table 1. Parameter DC CHARACTERISTICS, RHEOSTAT MODE 2 Resistor Differential Nonlinearity Resistor Nonlinearity 2 ...

Page 4

AD5232 Parameter 5, 9 DYNAMIC CHARACTERISTICS Bandwidth Total Harmonic Distortion V Settling Time W Resistor Noise Voltage Crosstalk ( Analog Crosstalk ( FLASH/EE MEMORY RELIABILITY 10 Endurance 11 Data Retention 1 Typical ...

Page 5

Data Sheet INTERFACE TIMING CHARACTERISTICS All input control voltages are specified with t characteristics are measured using both V Table Parameter Clock Cycle Time (t ) CYC CS Setup Time CLK Shutdown Time to CS Rise Input ...

Page 6

AD5232 Timing Diagrams CLK CPOL = 1 HIGH OR LOW SDI t 8 B16* SDO t 14 RDY NOTES 1. B24 IS AN EXTRA BIT THAT IS NOT DEFINED, BUT IT IS USUALLY THE LSB OF THE ...

Page 7

Data Sheet ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V to GND GND GND − ...

Page 8

AD5232 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Description 1 CLK Serial Input Register Clock. Shifts in one bit at a time on positive clock edges. 2 SDI Serial Data Input. The MSB is ...

Page 9

Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 2. 2.7V 1. 1.50 SS 1.25 1.00 INL T = –40°C A INL T 0.75 0.50 0.25 0 –0.25 INL T = +85°C A –0.50 –0.75 –1.00 –1.25 –1.50 ...

Page 10

AD5232 5. 2. –50 –35 –20 – TEMPERATURE (°C) Figure 11. I vs. Temperature CH1 5.00V CH2 5.00V M 2.00ms CH3 5.00V ...

Page 11

Data Sheet 0 0x80 –6 0x40 –12 0x20 –18 0x10 –24 0x08 –30 0x04 –36 0x02 –42 0x01 – +2. –2.7V SS – 100mV rms 25°C A –60 ...

Page 12

AD5232 TEST CIRCUITS Figure 22 to Figure 32 define the test conditions that are used in the Specifications section. NC DUT CONNECT Figure 22. Resistor Position Nonlinearity Error (Rheostat Operation; ...

Page 13

Data Sheet DUT W V GND CONNECT Figure 30. Common-Mode Leakage Current RDAC1 RDAC2 ...

Page 14

AD5232 THEORY OF OPERATION The AD5232 digital potentiometer is designed to operate as a true variable resistor replacement device for analog signals that remain within the terminal voltage range of V The basic voltage range is limited ...

Page 15

Data Sheet SERIAL DATA INTERFACE The AD5232 contains a 4-wire SPI-compatible digital interface (SDI, SDO and CLK) and uses a 16-bit serial data-word that is loaded MSB first. The format of the SPI-compatible word CS ) pin must ...

Page 16

AD5232 Command bits are identified as Cx, address bits are Ax, and data bits are Dx. The command instruction codes are defined in Table 8. The SDO output shifts out the last eight bits of data clocked into the serial ...

Page 17

Data Sheet ADVANCED CONTROL MODES The AD5232 digital potentiometer contains a set of user program- ming features to address the wide variety of applications avail- able to these universal adjustment devices. Key programming features include the following: • Independently programmable ...

Page 18

AD5232 USING ADDITIONAL INTERNAL, NONVOLATILE EEMEM The AD5232 contains additional internal user storage registers (EEMEM) for saving constants and other 8-bit data. Table 9 provides an address map of the internal nonvolatile storage registers, which are shown in the functional ...

Page 19

Data Sheet Table 11. Nominal Individual Segment Resistor Values (Ω) Segmented Resistor Size for R End-to-End Values AB Device 10 kΩ 50 kΩ Resolution Version Version 8-Bit 78.10 390.5 PROGRAMMING THE VARIABLE RESISTOR Rheostat Operation The nominal resistances of the ...

Page 20

AD5232 PROGRAMMING THE POTENTIOMETER DIVIDER Voltage Output Operation The digital potentiometer easily generates an output voltage pro- portional to the input voltage applied to a given terminal. For example, connecting Terminal and Terminal B to GND ...

Page 21

... JUNCTION TEMPERATURE (°C) J Figure 44. Flash/EE Memory Data Retention EVALUATION BOARD Analog Devices, Inc., offers a user-friendly EVAL-AD5232-10EBZ evaluation kit that can be controlled by a personal computer through a printer port. The driving program is self-contained; no programming languages or skills are needed. Rev Page AD5232 = 55°C. As ...

Page 22

... TSSOP RU-16 96 16-Lead TSSOP RU-16 1,000 16-Lead TSSOP RU-16 96 16-Lead TSSOP RU-16 1,000 16-Lead TSSOP RU-16 96 16-Lead TSSOP RU-16 1,000 16-Lead TSSOP RU-16 96 16-Lead TSSOP RU-16 1,000 16-Lead TSSOP RU-16 96 16-Lead TSSOP RU-16 1,000 Evaluation Board 1 Data Sheet 2 Branding 5232B10 5232B10 5232B10 5232B10 5232B50 5232B50 5232B50 5232B50 5232BC 5232BC 5232BC 5232BC ...

Page 23

Data Sheet NOTES Rev Page AD5232 ...

Page 24

Related keywords

EVAL-AD5232SDZ datasheet
EVAL-AD5232SDZ data sheet
EVAL-AD5232SDZ pdf datasheet
EVAL-AD5232SDZ component
EVAL-AD5232SDZ part
EVAL-AD5232SDZ distributor
EVAL-AD5232SDZ RoHS
EVAL-AD5232SDZ datasheet download