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X9313
Terminal Voltages 5V, 32 Taps
Data Sheet September 9, 2005 FN8177.2
Digitally Controlled Potentiometer (XDCPTM)
The Intersil X9313 is a digitally controlled potentiometer (XDCP). The device consists of a resistor array, wiper switches, a control section, and nonvolatile memory. The wiper position is controlled by a 3-wire interface. The potentiometer is implemented by a resistor array composed of 31 resistive elements and a wiper switching network. Between each element and at either end are tap points accessible to the wiper terminal. The position of the wiper element is controlled by the CS, U/D, and INC inputs. The position of the wiper can be stored in nonvolatile memory and then be recalled upon a subsequent power-up operation. The device 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 * Signal processing
Features
* Solid-state potentiometer * 3-wire serial interface * 32 wiper tap points - Wiper position stored in nonvolatile memory and recalled on power-up * 31 resistive elements - Temperature compensated - End to end resistance range 20% - Terminal voltages, -5V to +5V * Low power CMOS - VCC = 3V or 5V - Active current, 3mA max. - Standby current, 500A max. * High reliability - Endurance, 100,000 data changes per bit - Register data retention, 100 years * RTOTAL values = 1k, 10k, 50k * Packages - 8 Ld SOIC, MSOP and DIP * Pb-free plus anneal available (RoHS compliant)
Block Diagrams
U/D INC CS 5-BIT UP/DOWN COUNTER 31 30 29 5-BIT NONVOLATILE MEMORY 28 ONE OF THIRTY TWO DECODER 2 VSS (GROUND) VCC VSS GENERAL STORE AND RECALL CONTROL CIRCUITRY 1 0 RL/VL RW/VW DETAILED RH/VH
VCC (SUPPLY VOLTAGE)
UP/DOWN (U/D) INCREMENT (INC) DEVICE SELECT (CS) CONTROL AND MEMORY
RH/VH
RW/VW
TRANSFER GATES
RESISTOR ARRAY
RL/VL
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) is a registered trademark of Intersil Americas Inc. XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
X9313 Ordering Information
PART NUMBER X9313UM* X9313UMZ* (Note) X9313UMI* X9313UMIZ* (Note) X9313UP X9313UPI X9313US* X9313USZ* (Note) X9313USI* X9313USIZ* (Note) X9313USM X9313WM* X9313WMZ* (Note) X9313WMI* X9313WMIZ* (Note) X9313WP X9313WPI X9313WS* X9313WSZ* (Note) X9313WSI* X9313WSIZ* (Note) X9313WSMT2 X9313ZM* X9313ZMZ* (Note) X9313ZMI* X9313ZMIZ* (Note) X9313ZP X9313ZPI X9313ZS* X9313ZSZ* (Note) X9313ZSI* X9313ZSIZ* (Note) 313W DDF 13WI DDE X9313WP X9313XP I X9313WS X9313W Z X9313WS I X9313WS Z I X9313WS M 313Z DDJ 13ZI DDH X9313ZP X9313ZP I X9313ZS X9313 Z X9313ZS I X9313ZS Z I 1 10 PART MARKING 313U DDC 13UI DDB X9313UP X9313UP I X9313U X9313U Z X9313U I X9313U Z I VCC RANGE (V) 4.5 to 5.5 RTOTAL (k) 50 TEMPERATURE RANGE (C) 0 to 70 0 to 70 -40 to 85 -40 to 85 0 to 70 -40 to 85 0 to 70 0 to 70 -40 to 85 -40 to 85 0 to 70 0 to 70 0 to 70 -40 to 85 -40 to 85 0 to 70 -40 to 85 0 to 70 0 to 70 -40 to 85 -40 to 85 0 to 70 0 to 70 0 to 70 -40 to 85 -40 to 85 0 to 70 -40 to 85 0 to 70 0 to 70 -40 to 85 -40 to 85 PACKAGE 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld PDIP 8 Ld PDIP 8 Ld SOIC 8 Ld SOIC (Pb-free) 8 Ld SOIC 8 Ld SOIC (Pb-free) 8 Ld SOIC 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld PDIP 8 Ld PDIP 8 Ld SOIC 8 Ld SOIC (Pb-free) 8 Ld SOIC 8 Ld SOIC (Pb-free) 8 Ld SOIC Tape and Reel 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld PDIP 8 Ld PDIP 8 Ld SOIC 8 Ld SOIC (Pb-free) 8 Ld SOIC 8 Ld SOIC (Pb-free)
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FN8177.2 September 9, 2005
X9313 Ordering Information (Continued)
PART NUMBER X9313UM-3* X9313UMZ-3* (Note) X9313UMI-3* X9313UMIZ-3* (Note) X9313UP-3 X9313US-3* X9313USZ-3* (Note) X9313WM-3* X9313WMZ-3* (Note) X9313WMI-3* X9313WMIZ-3* (Note) X9313WP-3 X9313WS-3* X9313WSZ-3* (Note) X9313ZM-3* X9313ZMZ-3* (Note) X9313ZMI-3* X9313ZMIZ-3* (Note) X9313ZP-3 X9313ZS-3* X9313ZSZ-3* (Note) X9313ZSI-3* X9313ZSIZ-3* (Note) PART MARKING 13UD DDD 13UE 13UE Z X9313UP D X9313U D X9313U Z D 13WD DDG 13WE 13WE Z X9313WP D X9313W D X9313W Z D 13ZD DDK 13ZE 13ZE Z X9313ZP D X9313Z D X9313Z Z D X9313Z E X9313Z Z E 1 10 VCC RANGE (V) 3 to 5.5 RTOTAL (k) 50 TEMPERATURE RANGE (C) 0 to 70 0 to 70 -40 to 85 -40 to 85 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 -40 to 85 -40 to 85 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 -40 to 85 -40 to 85 0 to 70 0 to 70 0 to 70 -40 to 85 -40 to 85 PACKAGE 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld PDIP 8 Ld SOIC 8 Ld SOIC (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld PDIP 8 Ld SOIC 8 Ld SOIC (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld PDIP 8 Ld SOIC 8 Ld SOIC (Pb-free) 8 Ld SOIC 8 Ld SOIC (Pb-free)
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. *Add "T1" suffix for tape and reel.
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FN8177.2 September 9, 2005
X9313 Pin Descriptions
RH/VH and RL/VL
The high (RH/VH) and low (RL/VL) terminals of the X9313 are equivalent to the fixed terminals of a mechanical potentiometer. The terminology of RL/VL and RH/VH references the relative position of the terminal in relation to wiper movement direction selected by the U/D input and not the voltage potential on the terminal.
SYMBOL TABLE 1. PIN NAMES DESCRIPTION High terminal Wiper terminal Low terminal Ground Supply voltage Up/Down control input Increment control input Chip Select control input
RH/VH RW/VW
RL/VL
VSS VCC
U/D INC CS
RW/VW
RW/Vw is the wiper terminal and is equivalent to the movable terminal of a mechanical potentiometer. The position of the wiper within the array is determined by the control inputs. The wiper terminal series resistance is typically 40 at VCC = 5V.
Principles of Operation
There are three sections of the X9313: the input control, counter and decode section; the nonvolatile memory; and the resistor array. The input control section operates just like an up/down counter. The output of this counter is decoded to turn on a single electronic switch connecting a point on the resistor array to the wiper output. Under the proper conditions the contents of the counter can be stored in nonvolatile memory and retained for future use. The resistor array is comprised of 31 individual resistors connected in series. At either end of the array and between each resistor is an electronic switch that transfers the potential at that point to the wiper. The wiper, when at either fixed terminal, acts like its mechanical equivalent and does not move beyond the last position. That is, the counter does not wrap around when clocked to either extreme. The electronic switches on the device operate in a "make before break" mode when the wiper changes tap positions. If the wiper is moved several positions, multiple taps are connected to the wiper for tIW (INC to VW change). The RTOTAL value for the device can temporarily be reduced by a significant amount if the wiper is moved several positions. When the device is powered-down, the last wiper position stored will be maintained in the nonvolatile memory. When power is restored, the contents of the memory are recalled and the wiper is set to the value last stored.
Up/Down (U/D)
The U/D input controls the direction of the wiper movement and whether the counter is incremented or decremented.
Increment (INC)
The INC input is negative-edge triggered. Toggling INC will move the wiper and either increment or decrement the counter in the direction indicated by the logic level on the U/D input.
Chip Select (CS)
The device is selected when the CS input is LOW. The current counter value is stored in nonvolatile memory when CS is returned HIGH while the INC input is also HIGH. After the store operation is complete the X9313 will be placed in the low power standby mode until the device is selected once again.
Pin Configuration
8-Lead DIP/SOIC INC U/D RH/VH VSS 1 2 3 4 X9313 8 7 6 5 VCC CS RL/VL RW/VW
8-Lead MSOP RH/VH VSS RW/VW RL/VL 1 2 3 4 X9313 8 7 6 5 U/D INC VCC CS
Instructions and Programming
The INC, U/D and CS inputs control the movement of the wiper along the resistor array. With CS set LOW the device is selected and enabled to respond to the U/D and INC inputs. HIGH to LOW transitions on INC will increment or decrement (depending on the state of the U/D input) a seven bit counter. The output of this counter is decoded to select one of thirty two wiper positions along the resistive array. The value of the counter is stored in nonvolatile memory whenever CS transitions HIGH while the INC input is also HIGH.
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FN8177.2 September 9, 2005
X9313
The system may select the X9313, move the wiper and deselect the device without having to store the latest wiper position in nonvolatile memory. After the wiper movement is performed as described above and once the new position is reached, the system must keep INC LOW while taking CS HIGH. The new wiper position will be maintained until changed by the system or until a power-up/down cycle recalled the previously stored data. This procedure allows the system to always power-up to a preset value stored in nonvolatile memory; then during system operation minor adjustments could be made. The adjustments might be based on user preference, system parameter changes due to temperature drift, etc. The state of U/D may be changed while CS remains LOW. This allows the host system to enable the device and then move the wiper up and down until the proper trim is attained.
TABLE 2. MODE SELECTION CS L L H H X L L L INC U/D H L X X X H L Wiper up Wiper down Store wiper position Standby current No store, return to standby Wiper up (not recommended) Wiper down (not recommended) MODE
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 OUTPUTS Will be steady Will change from Low to High Will change from High to Low Changing: State Not Known Center Line is High Impedance
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FN8177.2 September 9, 2005
X9313
Absolute Maximum Ratings
Temperature Under Bias . . . . . . . . . . . . . . . . . . . . .-65C to +135C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65C to +150C Voltage on CS, INC, U/D, and VCC with respect to VSS . . . . . . . . . . . . . . . . . . . . . . . . -1V to +7V Voltage on VH, VL, VW with respect to VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . -6V to +7V V = |VH - VL|: X9313Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4V X9313W, X9313U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10V Lead Temperature (soldering 10 seconds) . . . . . . . . . . . . . . . 300C IW (10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.8mA
Recommended Operating Conditions
Temperature: Commercial. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to +70C Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40C to +85C Supply Voltage (VCC): X9313 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V 10% X9313-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 5.5V
CAUTION: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only; functional operation of the device (at these or any other conditions above those listed in the operational sections of this specification) is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Potentiometer Characteristics
SYMBOL PARAMETER
Over recommended operating conditions unless otherwise stated. LIMITS TEST CONDITIONS/NOTES MIN TYP MAX 20 -5 -5 RTOTAL 10k RTOTAL 1k +5 +5 10 16 40 100 4.4 Ref: 1kHz -120 3 RW(n)(actual) - RW(n)(expected) RW(n+1) - (RW(n)+MI) 300 20 See Circuit #3 10/10/25 1 0.2 UNIT % V V mW mW W mA dBV % MI (Note 3) MI (Note 3) ppm/C ppm/C pF
End-to-end resistance tolerance VVH VVL VH terminal voltage VL terminal voltage Power rating
RW IW
Wiper resistance Wiper current Noise Resolution Absolute linearity (Note 1) Relative linearity (Note 2) RTOTAL temperature coefficient Ratiometric temperature coefficient
IW = 1mA, VCC = 5V
CH/CL/CW NOTES:
Potentiometer capacitances
1. Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = (VW(n)(actual) - VW(n)(expected)) = 1 MI maximum. 2. Relative linearity is a measure of the error in step size between taps = RW(n+1) - (RW(n) + MI) = 0.2 MI. 3. 1 MI = minimum increment = RTOT / 31.
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FN8177.2 September 9, 2005
X9313
DC Operating Characteristics Over recommended operating conditions unless otherwise stated.
LIMITS SYMBOL ICC ISB ILI VIH VIL CIN NOTES: 4. Typical values are for TA = 25C and nominal supply voltage. 5. This parameter is periodically sampled and not 100% tested. PARAMETER VCC active current Standby supply current CS, INC, U/D input leakage current CS, INC, U/D input HIGH current CS, INC, U/D input LOW current CS, INC, U/D input capacitance VCC = 5V, VIN = VSS, TA = 25C, f = 1MHz TEST CONDITIONS/NOTES CS = VIL, U/D = VIL or VIH and INC = 0.42 / 2.4V @ max tCYC CS = VCC - 0.3V, U/D and INC = VSS or VCC - 0.3V VIN = VSS to VCC 2 -1 MIN TYP (Note 4) 1 200 MAX 3 500 10 VCC + 1 +0.8 10 UNIT mA A A V V pF
Endurance and Data Retention
PARAMETER Minimum endurance Data retention MIN 100,000 100 UNIT Data changes per bit per register Years
VH/RH VH/RH TEST POINT RH CH VS TEST POINT VW/RW VL/RL VL/RL VW VW/RW FORCE CURRENT
RTOTAL CW 25pF 10pF RW CL 10pF RL
FIGURE 1. TEST CIRCUIT #1
FIGURE 2. TEST CIRCUIT #2
FIGURE 3. CIRCUIT #3 SPICE MACRO MODEL
AC Conditions of Test
Input pulse levels Input rise and fall times Input reference levels 0V to 3V 10ns 1.5V
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FN8177.2 September 9, 2005
X9313
AC Operating Characteristics Over recommended operating conditions unless otherwise stated.
LIMITS SYMBOL tCI tID tDI tIL tIH tIC tCPH tCPH tIW tCYC tR, tF (Note 7) tPU (Note 7) tR VCC (Note 7) tWR NOTES: 6. Typical values are for TA = 25C and nominal supply voltage. 7. This parameter is not 100% tested. CS to INC setup INC HIGH to U/D change U/D to INC setup INC LOW period INC HIGH period INC inactive to CS inactive CS deselect time (STORE) CS deselect time (NO STORE) INC to VW change INC cycle time INC input rise and fall time Power-up to wiper stable VCC power-up rate Store cycle 0.2 5 4 500 5 50 10 PARAMETER MIN 100 100 2.9 1 1 1 20 100 1 5 TYP (Note 6) MAX UNIT ns ns s s s s ms ns s s s s V/ms ms
Power-Up and -Down Requirements
The recommended power-up sequence is to apply VCC/VSS first, then the potentiometer voltages. During power-up, the data sheet parameters for the DCP do not fully apply until 1 millisecond after VCC reaches its final value. The VCC ramp
spec is always in effect. In order to prevent unwanted tap position changes, or an inadvertent store, bring the CS and INC high before or concurrently with the VCC pin on powerup.
AC Timing
CS
tCYC tCI INC tIL tIH tIC tCPH 90% 10% tID U/D tDI tF tR 90%
tIW MI VW NOTE: MI IN THE AC TIMING DIAGRAM REFERS TO THE MINIMUM INCREMENTAL CHANGE IN THE VW OUTPUT DUE TO A CHANGE IN THE WIPER POSITION. (SEE NOTE)
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FN8177.2 September 9, 2005
X9313 Applications Information
Electronic digitally controlled potentiometers (XDCP) provide three powerful application advantages; (1) the variability and reliability of a solid-state potentiometer, (2) the flexibility of computer-based digital controls, and (3) the retentivity of nonvolatile memory used for the storage of multiple potentiometer settings or data.
Basic Configurations of Electronic Potentiometers
VR VH VW/RW VR
VL
I THREE-TERMINAL POTENTIOMETER; VARIABLE VOLTAGE DIVIDER
TWO-TERMINAL VARIABLE RESISTOR; VARIABLE CURRENT
Basic Circuits
BUFFERED REFERENCE VOLTAGE R1 +V +5V VW VREF - + - -5V R1 VOUT = VW/RW (a) (b) VO = (1 + R2 / R1)VS VW OP-07 VOUT +V VW/RW X -5V +V CASCADING TECHNIQUES +V VS + NONINVERTING AMPLIFIER +5V LM308A VO
R2
VOLTAGE REGULATOR
OFFSET VOLTAGE ADJUSTMENT R1 R2
COMPARATOR WITH HYSTERESIS
VIN
317 R1
VO (REG)
VS 100k - + VO
VS
LT311A
- + VO
}
}
Iadj R2 10k 10k VO (REG) = 1.25V (1 + R2 / R1) + IADJ R2 +12V -12V 10k
TL072
R1
R2
VUL = [R1 / (R1 + R2)] VO(max) VLL = [R1 / (R1 + R2)] VO(min)
(for additional circuits see AN115)
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FN8177.2 September 9, 2005
X9313 Packaging Information
8-LEAD MINIATURE SMALL OUTLINE GULL WING PACKAGE TYPE M
0.118 0.002 (3.00 0.05) 0.012 + 0.006 / -0.002 (0.30 + 0.15 / -0.05) 0.0256 (0.65) Typ.
R 0.014 (0.36) 0.118 0.002 (3.00 0.05)
0.030 (0.76) 0.0216 (0.55)
0.036 (0.91) 0.032 (0.81)
7 Typ.
0.040 0.002 (1.02 0.05)
0.008 (0.20) 0.004 (0.10)
0.0256" Typical
0.007 (0.18) 0.005 (0.13)
0.150 (3.81) Ref. 0.193 (4.90) Ref.
0.025" Typical 0.220"
FOOTPRINT
0.020" Typical 8 Places
NOTE ALL DIMENSIONS IN INCHES AND (MILLIMETERS
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FN8177.2 September 9, 2005
X9313 Packaging Information
8-LEAD PLASTIC SMALL OUTLINE GULL WING PACKAGE TYPE S
0.150 (3.80) 0.228 (5.80) 0.158 (4.00) 0.244 (6.20) Pin 1 Index Pin 1
0.014 (0.35) 0.019 (0.49) 0.188 (4.78) 0.197 (5.00) (4X) 7
0.053 (1.35) 0.069 (1.75) 0.004 (0.19) 0.010 (0.25)
0.050 (1.27)
0.010 (0.25) X 45 0.020 (0.50)
0.050"Typical
0 - 8 0.0075 (0.19) 0.010 (0.25) 0.016 (0.410) 0.037 (0.937) 0.250"
0.050" Typical
FOOTPRINT
0.030" Typical 8 Places
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. 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. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 11
FN8177.2 September 9, 2005

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