IC DGTL POT QUAD 64POS 24-TSSOP

AD5233BRUZ50-R7

Manufacturer Part NumberAD5233BRUZ50-R7
DescriptionIC DGTL POT QUAD 64POS 24-TSSOP
ManufacturerAnalog Devices Inc
AD5233BRUZ50-R7 datasheet
 

Specifications of AD5233BRUZ50-R7

Taps64Resistance (ohms)50K
Number Of Circuits4Temperature Coefficient600 ppm/°C Typical
Memory TypeNon-VolatileInterface4-Wire SPI Serial
Voltage - Supply2.7 V ~ 5.5 V, ±2.25 V ~ 2.75 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case24-TSSOP
Resistance In Ohms50KNumber Of Elements4
# Of Taps64Resistance (max)50KOhm
Power Supply RequirementSingle/DualInterface TypeSerial (4-Wire/SPI)
Single Supply Voltage (typ)3/5VDual Supply Voltage (typ)±2.5V
Single Supply Voltage (min)2.7VSingle Supply Voltage (max)5.5V
Dual Supply Voltage (min)±2.25VDual Supply Voltage (max)±2.75V
Operating Temp Range-40C to 85COperating Temperature ClassificationIndustrial
MountingSurface MountPin Count24
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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FEATURES
Nonvolatile memory stores wiper setting
4-channel independent programmable
64-position resolution
Power-on refreshed with EEMEM settings
EEMEM restore time: 140 μs typical
Full monotonic operation
10 kΩ, 50 kΩ, and 100 kΩ terminal resistance
Permanent memory write protection
Wiper setting readback
Predefined linear increment/decrement instructions
Predefined ±6 dB/step log taper increment/decrement
instructions
SPI-compatible serial interface with readback function
2.7 V to 5.5 V single supply or ±2.5 V dual supply
11 bytes extra nonvolatile memory for user-defined data
100-year typical data retention, T
= 55°C
A
APPLICATIONS
Mechanical potentiometer replacement
Instrumentation: gain, offset adjustment
Programmable voltage-to-current conversion
Programmable filters, delays, time constants
Programmable power supply
Sensor calibration
GENERAL DESCRIPTION
The AD5233 is a quad-channel nonvolatile memory,
2
controlled potentiometer
with a 64-step resolution. The device
performs the same electronic adjustment function as a mechanical
potentiometer with enhanced resolution, solid-state reliability,
and remote controllability. The AD5233 has versatile program-
ming using a serial peripheral interface (SPI) for 16 modes of
operation and adjustment, including scratchpad programming,
memory storing and restoring, increment/decrement, ±6 dB/step
log taper adjustment, wiper setting readback, and extra EEMEM
for user-defined information such as memory data for other
components, look-up tables, or system identification
information.
1
The terms nonvolatile memory and EEMEM are used interchangeably.
2
The terms digital potentiometer and RDAC are used interchangeably.
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.
Nonvolatile Memory, Quad
64-Position Digital Potentiometer
FUNCTIONAL BLOCK DIAGRAM
ADDR
CS
DECODE
CLK
SDI SERIAL
SDI
INTERFACE
SDO
SDO
WP
EEMEM
CONTROL
RDY
11 BYTES
USER EEMEM
DIGITAL
O1
OUTPUT
O2
BUFFER
2
DIGITAL 5
REGISTER
PR
EEMEM5
GND
1
digitally
In the scratchpad programming mode, a specific setting can
be programmed directly to the RDAC register, which sets the
resistance between Terminal W to Terminal A and Terminal W
to Terminal B. This setting can be stored into the EEMEM and
is transferred automatically to the RDAC register during system
power-on.
The EEMEM content can be restored dynamically or through
external PR strobing. A WP function protects EEMEM contents.
To simplify the programming, independent or simultaneous
increment or decrement commands can be used to move the
RDAC wiper up or down, one step at a time. For logarithmic
±6 dB step changes in wiper settings, the left or right bit shift
command can be used to double or halve the RDAC wiper
setting.
The AD5233 is available in a thin 24-lead TSSOP package. The
part is guaranteed to operate over the extended industrial
temperature range of −40°C to +85°C.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
AD5233
AD5233
RDAC1
REGISTER
EEMEM1
RDAC1
RDAC2
REGISTER
EEMEM2
RDAC2
RDAC3
REGISTER
EEMEM3
RDAC3
RDAC4
REGISTER
EEMEM4
RDAC4
Figure 1.
www.analog.com
©2002–2008 Analog Devices, Inc. All rights reserved.
V
DD
A1
W1
B1
A2
W2
B2
A3
W3
B3
A4
W4
B4
V
SS

AD5233BRUZ50-R7 Summary of contents

  • Page 1

    FEATURES Nonvolatile memory stores wiper setting 4-channel independent programmable 64-position resolution Power-on refreshed with EEMEM settings EEMEM restore time: 140 μs typical Full monotonic operation 10 kΩ, 50 kΩ, and 100 kΩ terminal resistance Permanent memory write protection Wiper setting ...

  • Page 2

    AD5233 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Electrical Characteristics—10 kΩ, 50 kΩ, and 100 kΩ Versions .......................................................................................... 3 Timing Characteristics ................................................................ ...

  • Page 3

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

  • Page 4

    AD5233 Parameter POWER SUPPLIES Single-Supply Power Range Dual-Supply Power Range Positive Supply Current Negative Supply Current EEMEM Store Mode Current 7 EEMEM Restore Mode Current 8 Power Dissipation 5 Power Supply Sensitivity 5, 9 DYNAMIC CHARACTERISTICS Bandwidth Total Harmonic Distortion ...

  • Page 5

    TIMING CHARACTERISTICS 5 and −40°C < Table 2. Parameter 2, 3 INTERFACE TIMING CHARACTERISTICS Clock Cycle Time (t ) CYC CS Setup Time CLK Shutdown Time to ...

  • Page 6

    AD5233 CLK CPOL = 1 HIGH OR LOW SDI t 8 SDO B16 RDY *EXTRA BIT THAT IS NOT DEFINED, BUT NORMALLY LSB OF CHARACTER PREVIOUSLY TRANSMITTED. THE CPOL = 1 MICROCONTROLLER COMMAND ALIGNS THE ...

  • Page 7

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

  • Page 8

    AD5233 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 O1 Nonvolatile Digital Output 1. Address (O1) = 0x4, the data bit position is D0; defaults to Logic 1 initially. 2 CLK Serial Input ...

  • Page 9

    TYPICAL PERFORMANCE CHARACTERISTICS 0.20 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 –0. CODE (Decimal) Figure 5. INL Error vs. Code −40°C, +25°C, +85°C Overlay 0.20 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 –0.20 ...

  • Page 10

    AD5233 CODE (Decimal) Figure 11. Wiper On Resistance vs. Code 5V/ ...

  • Page 11

    CODE 0x20 –6 0x10 –12 0x08 –18 0x04 –24 0x02 –30 0x01 –36 –42 100 1k 10k 100k FREQUENCY (Hz) Figure 17. Gain vs. Frequency vs. Code kΩ (Figure 31 CODE 0x20 –6 0x10 ...

  • Page 12

    AD5233 5V/DIV 5V/DIV 5V/DIV 4ms/DIV *SUPPLY CURRENT RETURNS TO MINIMUM POWER CONSUMPTION, IF INSTRUCTION 0 (NOP) IS EXECUTED IMMEDIATELY AFTER INSTRUCTION 1 (READ EEMEM). Figure 23. I vs. Time When Reading Data from EEMEM DD 100 CS 10 CLK 1 ...

  • Page 13

    TEST CIRCUITS Figure 25 to Figure 35 define the test conditions used in the specifications. NC DUT CONNECT Figure 25. Resistor Position Nonlinearity Error (Rheostat Operation; R-INL, R-DNL) DUT V+ ...

  • Page 14

    AD5233 DUT W V GND CONNECT Figure 33. Common-Mode Leakage Current RDAC1 RDAC2 log NC ...

  • Page 15

    THEORY OF OPERATION The AD5233 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 digital ...

  • Page 16

    AD5233 EEMEM PROTECTION The write protect ( WP ) pin disables any changes to the scratchpad register contents, except for the EEMEM setting, which can still be restored using Instruction 1, Instruction 8, and the PR pulse. Therefore, WP can ...

  • Page 17

    DAISY-CHAIN OPERATION The serial data output (SDO) pin serves two purposes. It can be used to read the contents of the wiper setting and EEMEM values using Instruction 10 and Instruction 9, respectively. The remaining instructions ( ...

  • Page 18

    AD5233 In Table are command bits are address bits are data bits that are applicable to the RDAC wiper register, and are applicable to the EEMEM register. ...

  • Page 19

    ADVANCED CONTROL MODES The AD5233 digital potentiometer includes a set of user programming features to address the wide number of applications for these universal adjustment devices. Key programming features include • Scratchpad programming to any desirable values • Nonvolatile memory ...

  • Page 20

    AD5233 Using Additional Internal Nonvolatile EEMEM The AD5233 contains additional user EEMEM registers for storing any 8-bit data. Table 9 provides an address map of the internal storage registers shown in the functional block diagram as EEMEM1, EEMEM2, and 11 ...

  • Page 21

    The general equation that determines the programmed output resistance between W and × where the decimal equivalent of the data contained in the ...

  • Page 22

    AD5233 The EEMEM1 value for RDAC1 can be restored by power-on, by strobing the PR pin programming, as shown in Table 14. Restoring the EEMEM1 Value to the RDAC1 Register SDI SDO Action 0x10XX 0xXXXX Restores the EEMEM1 ...

  • Page 23

    APPLICATIONS INFORMATION BIPOLAR OPERATION FROM DUAL SUPPLIES The AD5233 can be operated from dual supplies ±2.5 V, which enables control of ground-referenced ac signals or bipolar opera- tion. AC signals as high can be applied directly DD ...

  • Page 24

    AD5233 BIPOLAR PROGRAMMABLE GAIN AMPLIFIER There are several ways to achieve bipolar gain. Figure 50 shows one versatile implementation. Digital potentiometer, U1, sets the adjustment range; therefore, the wiper voltage, V programmed between V and − given U2 ...

  • Page 25

    PROGRAMMABLE STATE-VARIABLE FILTER One of the standard circuits used to generate a low-pass, high- pass, or band-pass filter is the state-variable active filter. The AD5233 digital potentiometer allows full programmability of the frequency, the gain, and the Q of the ...

  • Page 26

    AD5233 PROGRAMMABLE OSCILLATOR In a classic Wien-bridge oscillator, shown in Figure 55, the Wien network (R, R´, C, C´) provides positive feedback, while R1 and R2 provide negative feedback. At the resonant frequency the overall phase shift is ...

  • Page 27

    PROGRAMMABLE CURRENT SOURCE A programmable current source can be implemented with the circuit shown in Figure 58. + (2.048 + SLEEP OUTPUT B REF191 C1 1µF GND W A ...

  • Page 28

    AD5233 In voltage divider mode, by paralleling a discrete resistor as shown in Figure 61, a proportionately lower voltage appears at Terminal A to Terminal B. This translates into a finer degree of precision because the step size at Terminal ...

  • Page 29

    ... AD5233BRUZ10 4 2 AD5233BRUZ10-R7 4 AD5233BRU50 4 AD5233BRU50-REEL7 4 2 AD5233BRUZ50 4 2 AD5233BRUZ50-R7 4 AD5233BRU100 4 AD5233BRU100-REEL7 4 2 AD5233BRUZ100 4 AD5233BRUZ100- Line 1 contains the model number. Line 2 contains the Analog Devices logo followed by the end-to-end resistance value. Line 3 contains the date code, YWW or #YWW, for RoHS compliant parts. ...

  • Page 30

    AD5233 NOTES Rev Page ...

  • Page 31

    NOTES Rev Page AD5233 ...

  • Page 32

    AD5233 NOTES Purchase of licensed I²C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I²C Patent Rights to use these components in an I²C system, provided that the ...