X9251US24IZ-2.7 Intersil, X9251US24IZ-2.7 Datasheet

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X9251US24IZ-2.7

Manufacturer Part Number
X9251US24IZ-2.7
Description
IC XDCP QUAD 256TAP 50K 24-SOIC
Manufacturer
Intersil
Series
XDCP™r
Datasheet

Specifications of X9251US24IZ-2.7

Taps
256
Resistance (ohms)
50K
Number Of Circuits
4
Temperature Coefficient
300 ppm/°C Typical
Memory Type
Non-Volatile
Interface
SPI, 3-Wire Serial
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-SOIC (7.5mm Width)
Resistance In Ohms
50K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Quad Digitally-Controlled (XDCP™)
Potentiometer
The X9251 integrates four digitally controlled potentio-
meters (XDCP) on a monolithic CMOS integrated circuit.
The digitally controlled potentiometers are imple-mented
with a combination of resistor elements and CMOS switches.
The position of the wipers are controlled by the user through
the SPI bus interface. Each potentiometer has associated
with it a volatile Wiper Counter Register (WCR) and four
non-volatile Data Registers that can be directly written to and
read by the user. The content of the WCR controls the
position of the wiper. At power-up, the device recalls the
content of the default Data Registers of each DCP (DR00,
DR10, DR20, and DR30) to the corresponding WCR.
The XDCP can be used as a three-terminal potentiometer or
as a two terminal variable resistor in a wide variety of
applications including control, parameter adjustments, and
signal processing.
Functional Diagram
HOLD
SCK
SO
CS
A1
A0
SI
Interface
SPI
V
V
CC
SS
INTERFACE
POWER UP,
CONTROL
STATUS
®
AND
1
Data Sheet
WP
WCR0
DR00
DR01
DR02
DR03
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005-2007. All Rights Reserved
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
R
W0
DCP0
R
R
L0
H0
Single Supply/Low Power/256-Tap/SPI Bus
Features
• Four potentiometers in one package
• 256 resistor taps–0.4% resolution
• SPI Serial Interface for write, read, and transfer operations
• Wiper resistance: 100Ω typical @ V
• 4 Non-volatile data registers for each
• Non-volatile storage of multiple wiper positions
• Standby current <5µA max
• V
• 50kΩ, 100kΩ versions of total resistance
• 100 year data retention
• Single supply version of X9250
• Endurance: 100,000 data changes per bit per register
• 24 Ld SOIC, 24 Ld TSSOP
• Low power CMOS
• Pb-free plus anneal available (RoHS compliant)
WCR1
DR10
DR11
DR12
DR13
of the potentiometer
potentiometer
CC
: 2.7V to 5.5V Operation
R
All other trademarks mentioned are the property of their respective owners.
W1
DCP1
April 13, 2007
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
R
R
H1
L1
WCR2
DR20
DR21
DR22
DR23
R
W2
DCP2
R
R
H2
L2
WCR3
DR30
DR31
DR32
DR33
CC
= 5V
R
W3
DCP3
X9251
FN8166.5
R
R
H3
L3

Related parts for X9251US24IZ-2.7

X9251US24IZ-2.7 Summary of contents

Page 1

... CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 1-888-468-3774 Intersil (and design registered trademark of Intersil Americas Inc. XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005-2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners. X9251 FN8166.5 ...

Page 2

... X9251UV Z X9251TS24 X9251TS X9251TS24Z (Note) X9251TS Z X9251TS24I X9251TS I X9251TS24IZ (Note) X9251TS ZI X9251TV24I X9251TV I X9251TV24IZ (Note) X9251TV ZI X9251US24I-2.7 X9251US G X9251US24IZ-2.7 (Note) X9251US ZG X9251UV24-2.7 X9251UV F X9251UV24Z-2.7 (Note) X9251UV ZF X9251UV24I-2.7 X9251UV G X9251UV24IZ-2.7 (Note) X9251UV ZG X9251TS24-2.7 X9251TS F X9251TS24Z-2.7 (Note) X9251TS ZF X9251TV24-2.7 X9251TV F X9251TV24Z-2.7 (Note) X9251TV ZF X9251TV24I-2 ...

Page 3

Circuit Level Applications • Vary the gain of a voltage amplifier • Provide programmable dc reference voltages for comparators and detectors • Control the volume in audio circuits • Trim out the offset voltage error in a voltage amplifier circuit ...

Page 4

... The V the system ground. Other Pins NO CONNECT No connect pins should be left floating. This pins are used for Intersil manufacturing and testing purposes. HARDWARE WRITE PROTECT INPUT (WP) The WP pin when LOW prevents non-volatile writes to the Data Registers. Principles of Operation The X9251 is an integrated circuit incorporating four DCPs ...

Page 5

One of Four Potentiometers #: SERIAL DATA PATH FROM INTERFACE CIRCUITRY IF WCR = 00[H] then R is closet WCR = FF[H] then R is closet FIGURE 1. ...

Page 6

TABLE 1. WIPER COUNTER REGISTER, WCR (8-bit), WCR[7:0]: USED TO STORE THE CURRENT WIPER POSITION (VOLATILE) WCR7 WCR6 (MSB) TABLE 2. DATA REGISTER, DR (8-bit), DR[7:0]: USED TO STORE WIPER POSITIONS OR DATA (NON-VOLATILE) Bit 7 Bit 6 (MSB) Serial ...

Page 7

INSTRUCTION I3 Read Wiper Counter Register 1 Write Wiper Counter Register 1 Read Data Register 1 Write Data Register 1 XFR Data Register to 1 Wiper Counter Register XFR Wiper Counter 1 Register to Data Register Global XFR Data Registers ...

Page 8

Increment/Decrement Command The final command is Increment/Decrement (See Figures 6 and 7). The Increment/Decrement command is different from the other commands. Once the command is issued and the X9251 has responded with an Acknowledge, the master can clock the selected ...

Page 9

CS SCK ID3 ID2 ID1 ID0 INTERNAL DEVICE ID ADDRESS FIGURE 5. THREE-BYTE INSTRUCTION SEQUENCE (READ STATUS REGISTER) CS SCK ID3 ID2 ...

Page 10

Instruction Format Read Wiper Counter Register (WCR) Device Type Device Identifier Addresses CS Falling Edge Write Wiper Counter Register (WCR) Device Type Device Identifier Addresses CS Falling Edge ...

Page 11

Global Transfer Wiper Counter Register (WCR) to Data Register (DR) Device Type Device CS Identifier Addresses Falling Edge Transfer Wiper Counter Register (WCR) to Data Register (DR) Device Type Device CS Identifier ...

Page 12

Absolute Maximum Ratings Temperature Under Bias . . . . . . . . . . . . . . . . . . . . .-65°C to +135°C Storage Temperature . . . . . . . . . ...

Page 13

DC Operating Characteristics (Over the recommended operating conditions unless otherwise specified.) SYMBOL PARAMETER I V supply current CC1 CC (active supply current CC2 CC (non-volatile write current (standby Input leakage current LI I ...

Page 14

Equivalent A.C. Load Circuit V CC 2kΩ SO pin 2kΩ AC TIMING SYMBOL f SPI clock frequency SCK t SPI clock cycle rime CYC t SPI clock high rime WH t SPI clock low time WL t Lead time LEAD ...

Page 15

Symbol Table WAVEFORM INPUTS Must be steady May change from Low to High May change from High to Low Don’t Care: Changes Allowed N/A Timing Diagrams Input Timing CS t LEAD SCK MSB SI HIGH IMPEDANCE ...

Page 16

Hold Timing CS SCK HOLD XDCP Timing (for All Load Instructions) CS SCK MSB SI VWx HIGH IMPEDANCE SO Write Protect and Device Address Pins Timing X9251 t t HSU HH ...

Page 17

Applications information Basic Configurations of Electronic Potentiometers V R Three terminal Potentiometer; Variable voltage divider Application Circuits NON INVERTING AMPLIFIER – (1 OFFSET VOLTAGE ADJUSTMENT R ...

Page 18

Application Circuits (continued) ATTENUATOR – -1/2 ≤ G ≤ +1/2 INVERTING AMPLIFIER ...

Page 19

Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in the ...

Page 20

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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