ETC CAT5116

CAT5116
Preliminary Information
H
CAT5116
EE
GEN FR
ALO
Log-Taper, 100-Tap Digitally Programmable Potentiometer (DPP™)
LE
A D F R E ETM
FEATURES
APPLICATIONS
■ 100-position, log-taper potentiometer
■ Automated product calibration
■ Non-volatile EEPROM wiper storage
■ Remote control adjustments
■ 10nA ultra-low standby current
■ Offset, gain and zero control
■ Single-supply operation: 2.5V - 5.5V
■ Audio volume control
■ Increment Up/Down serial interface
■ Sensor adjustment
Ω
■ Resistance value: 32kΩ
■ Motor controls and feedback systems
■ Available in 8-pin MSOP, TSSOP, SOIC and DIP packages
■ Programmable analog functions
DESCRIPTION
The CAT5116 is a log-taper single digitally
programmable potentiometer (DPP™) designed as a
electronic replacement for mechanical potentiometers
and trim pots.
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.
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 digitally programmable potentiometer can be
used as a three-terminal resistive divider or as a
two-terminal variable resistor.
The wiper setting, stored in nonvolatile memory, is not
lost when the device is powered down and is
FUNCTIONAL DIAGRAM
RH
VCC
VCC
RH
U/D
INC
INTERFACE
&
WIPER
CONTROL
INC
UP/DOWN
INCREMENT
U/D
CS
CONTROL
AND
MEMORY
RH
RW
Potentiometer
R = 32kΩ
RW
RW
EEPROM
CHIP SELECT
CS
POR
RL
GND
RL
GND
GENERAL
© 2003 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
RL
BLOCK DIAGRAM
POTENTIOMETER SCHEMATIC
Doc. No. 2118, Rev. G
1
1
Doc. No. 2118, Rev. G
CAT5116
PIN CONFIGURATION
DIP Package (P, L)
INC
1
8
VCC
U/D
RH
2
3
7
6
CS
RL
GND
4
5
RW
INC
U/D
RH
GND
8
7
6
5
Pin Name
TSSOP Package (U, Y)
CS
VCC
1
2
3
4
INC
U/D
SOIC Package (S, W)
1
2
3
4
PIN FUNCTIONS
8
7
6
5
RL
RW
GND
RH
MSOP Package (R, Z)
VCC
CS
RL
INC
U/D
RH
RW
GND
1
2
3
4
8
7
6
5
VCC
CS
RL
RW
Function
INC
Increment Control
U/D
Up/Down Control
RH
Potentiometer High Terminal
GND
Ground
RW
Potentiometer Wiper Terminal
RL
Potentiometer Low Terminal
CS
Chip Select
VCC
Supply Voltage
PIN DESCRIPTIONS
INC
INC: Increment Control Input
CS
CS: Chip Select
The INC input moves the wiper in the up or down
direction determined by the condition of the U/D input.
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.
U/D
D: Up/Down Control Input
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. G
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 ........ -40°C to +85°C
Junction Temperature (10 secs) ..................... +150°C
Storage Temperature ...................................... +150°C
Lead Soltering (10 sec max) ........................... +300°C
*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
Parameter
Test Method
VZAP(1)
ILTH(1)(2)
ESD Susceptibility
Latch-Up
Data Retention
Endurance
MIL-STD-883, Test Method 3015
JEDEC Standard 17
MIL-STD-883, Test Method 1008
MIL-STD-883, Test Method 1003
TDR
NEND
Min
Typ
Max
2000
100
100
1,000,000
Units
Volts
mA
Years
Stores
DC ELECTRICAL CHARACTERISTICS: VCC = 2.5V to 5.5V unless otherwise specified.
Power Supply
Symbol Parameter
VCC
ICC1(3)
Operating Voltage Range
Supply Current (Increment)
ICC2
Supply Current (Write)
ISB1
Supply Current (Standby)
Conditions
Min
Typ
2.5
Max
Units
5.5
100
50
1
500
mA
µA
1
µA
Max
Units
2
0
10
-10
VCC
0.8
µA
µA
V
V
VCC x 0.7
VCC + 0.3
V
-0.3
VCC x 0.2
V
VCC = 5.5V, f = 1MHz, IW=0
VCC = 5.5V, f = 250kHz, IW=0
Programming, VCC = 5.5V
VCC = 3V
CS=VCC-0.3V
0.01
V
µA
U/D, INC=VCC-0.3V or GND
Logic Inputs
Symbol
Parameter
Conditions
IIH
IIL
VIH1
VIL1
Input Leakage Current
Input Leakage Current
TTL High Level Input Voltage
TTL Low Level Input Voltage
VIN = VCC
VIN = 0V
4.5V ≤ VCC ≤ 5.5V
VIH2
CMOS High Level Input Voltage
2.5V ≤ VCC ≤ 5.5V
VIL2
CMOS Low Level Input Voltage
NOTES:
Min
Typ
(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. G
CAT5116
POTENTIOMETER PARAMETERS
Symbol
Parameter
Conditions
RPOT
Potentiometer Resistance
RTOL
Pot Resistance Tolerance
VRH
Voltage on RH pin
VRL
Voltage on RL pin
RV*
Relative Variation
RWi
Wiper Resistance
IW
Min
Typ
32
TC of Pot Resistance
TCRATIO
Ratiometric TC
%
0
VCC
V
0
VCC
V
0.05
VCC = 5V, IW = 1mA
200
400
VCC = 2.5V, IW = 1mA
400
1000
100kHz / 1kHz
8/24
Potentiometer Capacitances
fc
Frequency Response
Passive Attenuator, 10kΩ
Ω
mA
ppm/oC
300
20
Noise
CH/CL/CW
kΩ
1
TCRPOT
Units
±15
Wiper Current
VN
Max
ppm/oC
nV/ Hz
8/8/25
pF
1.7
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
2.5V ≤ VCC ≤ 5.5V
Input Pulse Levels
0.2VCC to 0.7VCC
Input Rise and Fall Times
10ns
Input Reference Levels
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
Min
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
100
50
100
250
250
1
100
10
Doc. No. 2118, Rev. G
Typ(1)
Max
1
5
5
500
1
10
1
4
Units
ns
ns
ns
ns
ns
µs
ns
ms
µs
µs
µs
msec
ms
CAT5116
TYPICAL CHARACTERISTICS
VCC = 5V, TAMB = 25°C,unless otherwise specified
Wiper-Low/High Resistances vs. Wiper Position
Wiper-Low Resistance vs. Wiper Position (log scale)
100
100.0
80
Total Resistance (%) .
Total Resistance (%)
90
70
RH-RW
60
RW-RL
50
40
30
20
10.0
1.0
10
0
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
0.1
WIPER POSITION
WIPER POSITION
Wiper Resistance vs. Wiper Voltage
Standby Supply Current vs. Temperature
100
STANDBY CURRENT [nA] .
WIPER RESISTANCE [ohm]
600
Vcc = 3.0V
Tap 84
500
400
300
200
Vcc = 4.4V
Tap 84
100
0
0
1
2
3
4
WIPER VOLTAGE[V]
5
80
60
Vcc = 5 V
40
20
Vcc = 2.5 V
0
-40
6
-15
10
35
60
85
TEMPERATURE [°C]
5
Doc. No. 2118, Rev. G
CAT5116
AC Timing
CS
(store)
tCYC
tCI
tIL
tIC
tIH
tCPH
90%
INC
90%
10%
tDI
tID
tR
tF
U/D
MI (3)
tIW
RW
(1) Typical values are for TA=25˚C 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
OPERATING MODES
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. G
6
INC
CS
U/D
Operation
High to Low
Low
High
Wiper Toward H
Low
Low
Wiper Toward L
X
Store Wiper Position
High to Low
High
Low to High
Low
Low to High
X
No Store, Return to Standby
X
High
X
Standby
X: High or Low
RH
CH
Rwi
RW
CW
CL
RL
Potentiometer
Equivalent Circuit
CAT5116
ORDERING INFORMATION
Prefix
Device #
Suffix
5116
CAT
S
I
Product Number
Optional
Company ID
TE13
Tape & Reel
TE13: 2000/Reel
Package
P: PDIP
S: SOIC
U: TSSOP
R: MSOP
L: PDIP (Lead free, Halogen free)
W: 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)
REVISION HISTORY
Date
Rev.
Reason
10/9/2003
G
Revised Features
Revised Potentiometer Schematic
Revised DC Electrical Characteristics
Revised Potentiometer Parameters
7
Doc. No. 2118, Rev. G
Copyrights, Trademarks and Patents
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DPP ™
AE2 ™
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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:
Type:
2118
G
10/9/03
Preliminary