View X9315_1148805.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

(R)
X9315
Low Noise, Low Power, 32 Taps
Data Sheet September 15, 2005 FN8179.1
Digitally Controlled Potentiometer (XDCPTM)
The Intersil X9315 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 voltage, 0 to VCC * Low power CMOS - VCC = 2.7V or 5V - Active current, 50/400A max. - Standby current, 1A max. * High reliability - Endurance, 100,000 data changes per bit - Register data retention, 100 years * RTOTAL values = 10k, 50k, 100k * Packages - 8 Ld SOIC, MSOP and PDIP * Pb-free plus anneal available (RoHS compliant)
Block Diagram
U/D INC CS RH/VH Control and Memory RW/VW 5-Bit Nonvolatile Memory 5-Bit Up/Down Counter 31 30 29 28 One of Thirty Two Decoder 2 VSS (Ground) General VCC VSS 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)
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.
X9315 Ordering Information
PART NUMBER X9315WM* X9315WMZ* (Note) X9315WMI* X9315WMIZ* (Note) X9315WP X9315WPI X9315WS* X9315WSZ* (Note) X9315WSI* X9315WSIZ* (Note) X9315UM* X9315UMZ* (Note) X9315UMI* X9315UMIZ* (Note) X9315UP X9315UPI X9315US* X9315USZ* (Note) X9315USI* X9315USIZ* (Note) X9315TM* X9315TMZ* (Note) X9315TMI* X9315TMIZ* (Note) X9315TP X9315TPI X9315TS* X9315TSZ* (Note) X9315TSI* X9315TSIZ* (Note) DDS AEB DDR X9315UP X9315UP I X9315U X9315U Z X9315U I X9315U Z I AEJ DDN ADZ DDL X9315TP X9315TP I X9315T X9315T Z X9315T I X9315T Z I 100 PART MARKING AAW DDT AAX AKW X9315WP X9315WP I X9315W X9315W Z X9315W I X9315W Z I 50 VCC LIMITS (V) 5 10% RTOTAL (k) 10 TEMP 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 -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 -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 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 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)
2
FN8179.1 September 15, 2005
X9315 Ordering Information (Continued)
PART NUMBER X9315TP-2.7 X9315TPI-2.7 X9315WM-2.7* X9315WMZ-2.7* (Note) X9315WMI-2.7* X9315WMIZ-2.7* (Note) X9315WP-2.7 X9315WPI-2.7 X9315WS-2.7* X9315WSZ-2.7* (Note) X9315WSI-2.7* X9315WSIZ-2.7* (Note) X9315UM-2.7* X9315UMZ-2.7* (Note) X9315UMI-2.7* X9315UMIZ-2.7* (Note) X9315UP-2.7 X9315UPI-2.7 X9315US-2.7* X9315USZ-2.7* (Note) X9315USI-2.7* X9315USIZ-2.7* (Note) X9315TM-2.7* X9315TMZ-2.7* (Note) X9315TMI-2.7* X9315TMIZ-2.7* (Note) X9315TS-2.7* X9315TSZ-2.7* (Note) X9315TSI-2.7* X9315TSIZ-2.7* (Note) X9315U F X9315U Z F X9315U G X9315U Z G AEI DDP ADY DDM X9315T F X9315T Z F X9315T G X9315T Z G 100 X9315WP F X9315WP G X9315W F X9315W Z F X9315W G X9315W Z G AEK AKU AEA AJG 50 PART MARKING X9315TP F X9315TP G AAU AOI AAV VCC LIMITS (V) 2.7-5.5 RTOTAL (k) 10 TEMP RANGE (C) 0 to 70 -40 to 85 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 -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 -40 to 85 -40 to 85 0 to 70 0 to 70 -40 to 85 -40 to 85 PACKAGE 8 Ld PDIP 8 Ld PDIP 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 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 MSOP 8 Ld MSOP (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) 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.
3
FN8179.1 September 15, 2005
X9315 Pin Descriptions
RH/VH and RL/VL
The high (RH/VH) and low (RL/VL) terminals of the X9315 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. 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.
Pin Names
SYMBOL INC CS DESCRIPTION Increment control input Chip Select control input
Principles of Operation
There are three sections of the X9315: 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 connection 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.
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 200 at VCC = 5V.
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 X9315 will be placed in the low power standby mode until the device is selected once again.
Pin Configuration
DIP/SOIC/MSOP INC U/D RH/VH VSS 1 2 3 4 X9315 8 7 6 5 VCC CS RL/VL RW/VW
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 five 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. The system may select the X9315, 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
Pin Names
SYMBOL RH/VH RW/VW RL/VL VSS VCC U/D DESCRIPTION High terminal Wiper terminal Low terminal Ground Supply voltage Up/Down control input
4
FN8179.1 September 15, 2005
X9315
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.
Mode Selection
CS L L H H X L INC U/D H L X X X Wiper Up Wiper Down Store Wiper Position Standby Current No Store, Return to Standby 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
5
FN8179.1 September 15, 2005
X9315
Absolute Maximum Ratings
Temperature under bias . . . . . . . . . . . . . . . . . . . . . .-65C to +135C Storage temperature . . . . . . . . . . . . . . . . . . . . . . . .-65C to +150C Voltage on CS, INC, U/D, VH, VL and VCC with respect to VSS . . . . . . . . . . . . . . . . . . . . . . . -1V to +7V V = |VH-VL| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5V Lead temperature (soldering 10 seconds) . . . . . . . . . . . . . . . . 300C IW (10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.5mA
Recommended Operating Conditions
Temperature (Commercial) . . . . . . . . . . . . . . . . . . . . . 0C to +70C Temperature (Industrial). . . . . . . . . . . . . . . . . . . . . . .-40C to +85C Supply Voltage (VCC) (Note 4) Limits X9315. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V 10% X9315-2.7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V 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; the 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
(Over recommended operating conditions unless otherwise stated.) LIMITS
PARAMETER End to end resistance tolerance
TEST CONDITIONS/NOTES
MIN
TYP
MAX. 20
UNIT % V V mW mA dBV %
VVH VVL
VH terminal voltage VL terminal voltage Power rating RTOTAL 10k IW = 1mA, VCC = 5V IW = 1mA, VCC = 2.7V
0 0
VCC VCC 10 200 400 400 1000 3.75
RW RW IW
Wiper resistance Wiper resistance Wiper current Noise Resolution Absolute linearity(1) Relative linearity(2) RTOTAL temperature coefficient Ratiometric temperature coefficient
Ref: 1kHz
-120 3
Vw(n)(actual) - Vw(n)(expected) Vw(n + 1) - [Vw(n) + MI] 300
1 0.2
MI(3) MI(3) ppm/C
20 See circuit #3 10/10/25
ppm/C pF
CH/CL/CW
Potentiometer capacitances
Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = (Vw(n)(actual) - Vw(n)(expected)) = 1 Ml Maximum. (2) Relative linearity is a measure of the error in step size between taps = RW(n+1) - [Rw(n) + Ml] = 0.2 Ml. (3) 1 Ml = Minimum Increment = RTOT/31. (4) Typical values are for TA = 25C and nominal supply voltage. (5) This parameter is periodically sampled and not 100% tested
DC Electrical Specifications
SYMBOL ICC1 ICC2 ISB ILI VIH VIL CIN(5) PARAMETER
(Over recommended operating conditions unless otherwise specified. LIMITS TEST CONDITIONS CS = VIL, U/D = VIL or VIH and INC = 0.4V @ max. tCYC CS = VIH, U/D = VIL or VIH and INC = VIH @ max. tWR CS = VCC - 0.3V, U/D and INC = VSS or VCC - 0.3V VIN = VSS to VCC VCC x 0.7 -0.5 VCC = 5V, VIN = VSS, TA = 25C, f = 1MHz MIN TYP(4) MAX 50 400 1 10 VCC + 0.5 VCC x 0.1 10 UNIT A A A A V V pF
VCC active current (Increment) VCC active current (Store) (EEPROM Store) Standby supply current CS, INC, U/D input leakage current CS, INC, U/D input HIGH voltage CS, INC, U/D input LOW voltage CS, INC, U/D input capacitance
6
FN8179.1 September 15, 2005
X9315
Endurance and Data Retention
PARAMETER Minimum endurance Data retention MIN 100,000 100 UNIT Data changes per bit Years
Test Circuit #1
VH/RH
Test Circuit #2
VH/RH Test Point
Circuit #3 SPICE Macro Model
RTOTAL RH CH VW VW/RW Force Current CW 25pF 10pF RW CL 10pF RL
VS
Test Point VW/RW VL/RL V L /RL VL
AC Conditions of Test
Input pulse levels Input rise and fall times Input reference levels 0V to 3V 10ns 1.5V (Over recommended operating conditions unless otherwise specified) LIMITS SYMBOL tCl tlD tDI tlL tlH tlC tCPH tCPH tIW tCYC tR, tF(7) tPU(7) tR VCC(7) tWR 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 (NO STORE) CS Deselect time (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 1 100 10 1 5 TYP(6) MAX UNIT ns ns s s s s ns ms s s s s V/ms ms
AC Electrical Specifications
7
FN8179.1 September 15, 2005
X9315 Power-up and Down Requirements
There are no restrictions on the power-up or power-down conditions of VCC and the voltages applied to the potentiometer pins provided that VCC is always more positive than or equal to VH, VL, and VW, i.e., VCC VH, VL, VW. The VCC ramp rate spec is always in effect.
AC Timing
CS tCYC tCI INC tID tF tIL tIH tIC (Store) tCPH 90% 90% 10%
DI
tR
U/D tIW VW MI (8)
Notes: (6) Typical values are for TA = 25C and nominal supply voltage. (7) This parameter is not 100% tested. (8) MI in the A.C. timing diagram refers to the minimum incremental change in the VW output due to a change in the wiper position.
Performance Characteristics (Typical)
Typical Noise
0 -10 -20 -30 -40
Noise (dB)
-50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
Frequency (kHz)
8
FN8179.1 September 15, 2005
X9315
Typical Rtotal vs. Temperature
10000 9800 9600 9400
Rtotal
9200 9000 8800 8600 8400 8200 8000 -55 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 125 C
Temperature
Typical Total Resistance Temperature Coefficient
0
-50
-100
-150
PPM
-200
-250
-300
-350 -55
-45
-35
-25
-15
-5
5
15
25
35
45
55
65
75
85
95
105
115
125
C
Temperature
Typical Wiper Resistance
800
700
600
500
Rw ()
400
300
200
100
0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 VCC = 2.7V
Tap
9
FN8179.1 September 15, 2005
X9315
Typical Absolute% Error per Tap Position
40.0% 30.0%
Absolute% Error
20.0% 10.0% 0.0% -10.0% -20.0% -30.0% -40.0% 0 3 6 9 12 15 18 21 24 27 30
Tap
Typical Relative% Error per Tap Position
20.0% 15.0%
Relative% Error
10.0% 5.0% 0.0% -5.0% -10.0% -15.0% -20.0% 0 3 6 9 12 15 18 21 24 27 30
Tap
Applications Information
Electronic digitally controlled (XDCP) potentiometers 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.
10
FN8179.1 September 15, 2005
X9315
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 VREF VW + - -5V VOUT = VW/RW (a) (b) OP-07 VOUT +V R1 RW/VW RW/VW X Cascading Techniques +V +V VS + - -5V R2 Noninverting Amplifier +5V LM308A VO
VO = (1 + R2/R1)VS
Voltage Regulator
Comparator with Hysteresis
VIN
317 R1
VO (REG)
VS
LT311A
- + VO
Iadj R2
VO (REG) = 1.25V (1 + R2/R1) + Iadj R2
VUL = {R1/(R1 + R2)} VO(max) VLL = {R1/(R1 + R2)} VO(min)
(for additional circuits see AN115)
}
R1
}
R2
11
FN8179.1 September 15, 2005
X9315 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: 1. ALL DIMENSIONS IN INCHES AND (MILLIMETERS)
12
FN8179.1 September 15, 2005
X9315 Packaging Information
8-Lead Plastic Dual In-Line Package Type P
0.430 (10.92) 0.360 (9.14)
0.260 (6.60) 0.240 (6.10) Pin 1 Index Pin 1 0.300 (7.62) Ref. 0.060 (1.52) 0.020 (0.51)
Half Shoulder Width On All End Pins Optional Seating Plane 0.150 (3.81) 0.125 (3.18)
0.145 (3.68) 0.128 (3.25) 0.025 (0.64) 0.015 (0.38) 0.065 (1.65) 0.045 (1.14) 0.020 (0.51) 0.016 (0.41)
0.110 (2.79) 0.090 (2.29)
.073 (1.84) Max.
0.325 (8.25) 0.300 (7.62)
Typ. 0.010 (0.25)
0 15
NOTE: 1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH
13
FN8179.1 September 15, 2005
X9315 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 14
FN8179.1 September 15, 2005

▲Up To Search▲

Price & Availability of X9315

	To Download X9315 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .