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CAT5116
CAT5116
Log-Taper, 100-Tap Digitally Programmable Potentiometer (DPPTM) FEATURES
s 100-position, log-taper potentiometer s Non-volatile EEPROM wiper storage s 10nA ultra-low standby current s Single-supply operation: 2.5V - 5.5V s Increment Up/Down serial interface s Resistance value: 32k s Available in 8-pin MSOP, TSSOP, SOIC and DIP packages
H
GEN FR ALO
EE
APPLICATIONS
s Remote control adjustments s Offset, gain and zero control s Audio volume control s Sensor adjustment
LE
A D F R E ETM
s Automated product calibration
s Motor controls and feedback systems s Programmable analog functions
DESCRIPTION
The CAT5116 is a log-taper single digitally programmable potentiometer (DPPTM) designed as a electronic replacement for mechanical potentiometers and trim pots. Ideal for automated adjustments on high volume production lines, DPP ICs are well suited for applications where equipment requiring periodic adjustment is either difficult to access or located in a hazardous or remote environment. The CAT5116 contains a 100-tap series resistor array connected between two terminals RH and RL. An up/ down counter and decoder that are controlled by three input pins, determines which tap is connected to the wiper, RW. The wiper setting, stored in nonvolatile memory, is not lost when the device is powered down and is automatically reinstated when power is returned. The wiper can be adjusted to test new system values without effecting the stored setting. Wiper-control of the CAT5116 is accomplished with three input control pins, CS, U/D, and INC. The INC input increments the wiper in the direction which is determined by the logic state of the U/D input. The CS input is used to select the device and also store the wiper position prior to power down. The digitally programmable potentiometer can be used as a three-terminal resistive divider or as a two-terminal variable resistor.
FUNCTIONAL DIAGRAM
VCC
VCC U/D INC CS
CONTROL AND MEMORY
RH
RH
RH
UP/DOWN
U/D
INTERFACE & WIPER CONTROL
RW
Potentiometer R = 32k
RW
INCREMENT
INC
CHIP SELECT
RW
EEPROM
CS
POR
RL
GND
RL
GND
RL
GENERAL
BLOCK DIAGRAM
POTENTIOMETER SCHEMATIC
(c) 2004 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice
1 1
Doc. No. 2118, Rev. J Doc. No. 2118, Rev. J
CAT5116
PIN CONFIGURATION
DIP Package (P, L)
INC U/D RH GND 1 2 3 4 8 7 6 5 VCC CS RL RW
PIN FUNCTIONS
TSSOP Package (U, Y)
Pin Name INC U/D RH GND
Function Increment Control Up/Down Control Potentiometer High Terminal Ground Potentiometer Wiper Terminal Potentiometer Low Terminal Chip Select Supply Voltage
CS VCC INC U/D
1 2 3 4
8 7 6 5
RL RW GND RH
SOIC Package (S, V)
INC U/D RH GND 1 2 3 4 8 7 6 5 VCC CS RL RW
MSOP Package (R, Z)
INC U/D RH GND 1 2 3 4 8 7 6 5 VCC CS RL RW
RW RL CS VCC
PIN DESCRIPTIONS
INC: INC Increment Control Input The INC input moves the wiper in the up or down direction determined by the condition of the U/D input. U/D: Up/Down Control Input D The U/D input controls the direction of the wiper movement. When in a high state and CS is low, any highto-low transition on INC will cause the wiper to move one increment toward the RH terminal. When in a low state and CS is low, any high-to-low transition on INC will cause the wiper to move one increment towards the RL terminal. RH: High End Potentiometer Terminal RH is the high end terminal of the potentiometer. It is not required that this terminal be connected to a potential greater than the RL terminal. Voltage applied to the RH terminal cannot exceed the supply voltage, VCC or go below ground, GND. RW: Wiper Potentiometer Terminal RW is the wiper terminal of the potentiometer. Its position on the resistor array is controlled by the control inputs, INC, U/D and CS. Voltage applied to the RW terminal cannot exceed the supply voltage, VCC or go below ground, GND. RL: Low End Potentiometer Terminal RL is the low end terminal of the potentiometer. It is not required that this terminal be connected to a potential less than the RH terminal. Voltage applied to the RL terminal cannot exceed the supply voltage, VCC or go below ground, GND. R L and R H are electrically interchangeable.
Doc. No. 2118, Rev. J
CS: CS Chip Select The chip select input is used to activate the control input of the CAT5116 and is active low. When in a high state, activity on the INC and U/D inputs will not affect or change the position of the wiper.
2
CAT5116
ABSOLUTE MAXIMUM RATINGS
Supply Voltage VCC to GND ....................................... -0.5V to +7V Inputs CS to GND ........................ -0.5V to VCC to +0.5V INC to GND ....................... -0.5V to VCC to +0.5V U/D to GND ....................... -0.5V to VCC to +0.5V RH to GND ......................... -0.5V to VCC to +0.5V RL to GND ......................... -0.5V to VCC to +0.5V RW to GND ........................ -0.5V to VCC to +0.5V Operating Ambient Temperature ........ -40C to +85C Junction Temperature (10 secs) ..................... +150C Storage Temperature ...................................... +150C Lead Soltering (10 sec max) ........................... +300C
*Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. Absolute Maximum Ratings are limited values applied individually while other parameters are within specified operating conditions, and functional operation at any of these conditions is NOT implied. Device performance and reliability may be impaired by exposure to absolute rating conditions for extended periods of time.
RELIABILITY CHARACTERISTICS
Symbol
VZAP(1) ILTH(1)(2) TDR NEND
Parameter
ESD Susceptibility Latch-Up Data Retention Endurance
Test Method
MIL-STD-883, Test Method 3015 JEDEC Standard 17 MIL-STD-883, Test Method 1008 MIL-STD-883, Test Method 1003
Min
2000 100 100 1,000,000
Typ
Max
Units
Volts mA Years Stores
DC ELECTRICAL CHARACTERISTICS: VCC = 2.5V to 5.5V unless otherwise specified.
Power Supply Symbol Parameter
VCC ICC1(3) ICC2 ISB1 Operating Voltage Range Supply Current (Increment) Supply Current (Write) Supply Current (Standby)
Conditions
VCC = 5.5V, f = 1MHz, IW=0 VCC = 5.5V, f = 250kHz, IW=0 Programming, VCC = 5.5V VCC = 3V CS=VCC-0.3V U/D, INC=VCC-0.3V or GND
Min
2.5
Typ
Max
5.5 100 50 1 500
Units
V A mA A A
0.01
1
Logic Inputs Symbol
IIH IIL VIH1 VIL1 VIH2 VIL2
NOTES:
Parameter
Input Leakage Current Input Leakage Current TTL High Level Input Voltage TTL Low Level Input Voltage CMOS High Level Input Voltage CMOS Low Level Input Voltage
Conditions
VIN = VCC VIN = 0V 4.5V VCC 5.5V 2.5V VCC 5.5V
Min
Typ
Max
10 -10 VCC 0.8 VCC + 0.3 VCC x 0.2
Units
A A V V V V
2 0 VCC x 0.7 -0.3
(1) This parameter is tested initially and after a design or process change that affects the parameter. (2) Latch-up protection is provided for stresses up to 100mA on address and data pins from -1V to VCC + 1V (3) IW=source or sink
3
Doc. No. 2118, Rev. J
CAT5116
POTENTIOMETER PARAMETERS
Symbol RPOT RTOL VRH VRL RV
*
Parameter Potentiometer Resistance Pot Resistance Tolerance Voltage on RH pin Voltage on RL pin Relative Variation Wiper Resistance Wiper Current TC of Pot Resistance Ratiometric TC Noise Potentiometer Capacitances Frequency Response
Conditions
Min
Typ 32
Max 20
Units k % V V mA ppm/oC
0 0
VCC VCC 0.05
RWi IW TCRPOT TCRATIO VN CH/CL/CW fc
VCC = 5V, IW = 1mA VCC = 2.5V, IW = 1mA
200 400
400 1000 1
300 20 100kHz / 1kHz 8/24 8/8/25 Passive Attenuator, 10k 1.7
ppm/oC nV/ Hz pF MHz
* Relative variation is a measure of the error in step size between taps = log (VW(N)) - log(VW(N-1)) = 0.045 + 0.003
AC TEST CONDITIONS
VCC Range Input Pulse Levels Input Rise and Fall Times Input Reference Levels 2.5V VCC 5.5V 0.2VCC to 0.7VCC 10ns 0.5VCC
AC OPERATING CHARACTERISTICS
VCC = +2.5V to +5.5V, VH = VCC, VL = 0V, unless otherwise specified Symbol
tCI tDI tID tIL tIH tIC tCPH1 tCPH2 tIW tCYC tR, tF(2) tPU(2) tWR
Parameter
CS to INC Setup U/D to INC Setup U/D to INC Hold INC LOW Period INC HIGH Period INC Inactive to CS Inactive CS Deselect Time (NO STORE) CS Deselect Time (STORE) INC to VOUT Change INC Cycle Time INC Input Rise and Fall Time Power-up to Wiper Stable Store Cycle
Min
100 50 100 250 250 1 100 10
Typ(1)
Max
Units
ns ns ns ns ns s ns ms s s s msec ms
1 1
5 500 1 10
5
Doc. No. 2118, Rev. J
4
CAT5116
TYPICAL CHARACTERISTICS
VCC = 5V, TAMB = 25C,unless otherwise specified
Wiper-Low/High Resistances vs. Wiper Position
100 90 Total Resistance (%) 70 60 50 40 30 20 10 0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 RH-RW RW-RL
Wiper-Low Resistance vs. Wiper Position (log scale)
100.0
Total Resistance (%) .
80
10.0
1.0
0.1
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
WIPER POSITION
WIPER POSITION
Wiper Resistance vs. Wiper Voltage
STANDBY CURRENT [nA] .
600 WIPER RESISTANCE [ohm] 500 400 300 200 100 0 0 1 2 3 4 WIPER VOLTAGE[V] 5 6 Vcc = 4.4V Tap 84 Vcc = 3.0V Tap 84
Standby Supply Current vs. Temperature
100 80 60 40 20 Vcc = 2.5 V 0 -40 -15 10 35 60 85
TEMPERATURE [C]
Vcc = 5 V
5
Doc. No. 2118, Rev. J
CAT5116
AC Timing
CS tCYC tIL tIH
(store)
tCI INC
tIC
tCPH
90% 10% 90%
tDI
tID
U/D
tF
tR
tIW RW
MI (3)
(1) Typical values are for TA=25C and nominal supply voltage. (2) This parameter is periodically sampled and not 100% tested. (3) MI in the AC Timing diagram refers to the minimum incremental change in the W output due to a change in the wiper position.
DEVICE OPERATION
The CAT5116 operates like a digitally controlled potentiometer with RH and RL equivalent to the high and low terminals and RW equivalent to the mechanical potentiometer's wiper. There are 100 tap positions including the resistor end points, RH and RL. There are 99 resistor elements connected in series between the R H and R L terminals. The wiper terminal is connected to one of the 100 taps and is controlled by three inputs, INC, U/D and CS. These inputs control a seven-bit up/down counter whose output is decoded to select the wiper position. The selected wiper position can be stored in nonvolatile memory using the INC and CS inputs. With CS set LOW the CAT5116 is selected and will respond to the U/D and INC inputs. HIGH to LOW transitions on INC wil increment or decrement the wiper (depending on the state of the U/D input and seven-bit counter). The wiper, when at either fixed terminal, acts like its mechanical equivalent and does not move beyond the last position. The value of the counter is stored in nonvolatile memory whenever CS transitions HIGH while the INC input is also HIGH. When the CAT5116 is powered-down, the last stored wiper counter position is maintained in the nonvolatile memory. When power is restored, the contents of the memory are recalled and the counter is set to the value stored. With INC set low, the CAT5116 may be de-selected and powered down without storing the current wiper position in nonvolatile memory. This allows the system to always power up to a preset value stored in nonvolatile memory.
Doc. No. 2118, Rev. J
OPERATING MODES
INC High to Low High to Low High Low X CS Low Low Low to High Low to High High U/D High Low X X X Operation Wiper Toward H Wiper Toward L Store Wiper Position No Store, Return to Standby Standby
X: High or Low
RH CH Rwi RW CW CL
RL
Potentiometer Equivalent Circuit
6
CAT5116
ORDERING INFORMATION
Prefix CAT Device # 5116 Suffix S I TE13
Optional Company ID
Product Number
Tape & Reel SOIC: 2000/Reel TSSOP: 2000/Reel MSOP: 2500/Reel
Package P: PDIP S: SOIC U: TSSOP R: MSOP L: PDIP (Lead free, Halogen free) V: SOIC (Lead free, Halogen free) Y: TSSOP (Lead free, Halogen free) Z: MSOP (Lead free, Halogen free)
Notes: (1) The device used in the above example is a CAT5116 SI-TE13 (SOIC, Industrial Temperature, Tape & Reel)
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Doc. No. 2118, Rev. J
REVISION HISTORY
Date 10/9/2003 Rev. G Reason Revised Features Revised Potentiometer Schematic Revised DC Electrical Characteristics Updated Potentiometer Parameters 3/10/2004 3/29/2004 4/12/2004 H I J Updated Potentiometer Parameters Changed Green Package marking for SOIC from W to V Eliminated data sheet designation Updated Reel Ordering Information
Copyrights, Trademarks and Patents Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:
DPP TM AE2 TM
Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. For a complete list of patents issued to Catalyst Semiconductor contact the Company's corporate office at 408.542.1000.
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Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal injury or death may occur. Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale. Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical semiconductor applications and may not be complete.
Catalyst Semiconductor, Inc. Corporate Headquarters 1250 Borregas Avenue Sunnyvale, CA 94089 Phone: 408.542.1000 Fax: 408.542.1200 www.catalyst-semiconductor.com
Publication #: Revison: Issue date:
2118 J 4/12/04

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