H
EE
GEN FR
ALO
Preliminary Information
CAT5115
32-Tap Digitally Programmable Potentiometer (DPP™)
LE
A D F R E ETM
FEATURES
APPLICATIONS
■ 32-position, linear-taper potentiometer
■ Automated product calibration
■ Low power CMOS technology
■ Remote control adjustments
■ Single supply operation: 2.5V-5.5V
■ Offset, gain and zero control
■ Increment up/down serial interface
■ Tamper-proof calibrations
Ω, 50kΩ
Ω and 100kΩ
Ω
■ Resistance values: 10kΩ
■ Contrast, brightness and volume controls
■ Available in PDIP, SOIC, TSSOP and MSOP packages
■ Motor controls and feedback systems
■ Programmable analog functions
DESCRIPTION
determined by the logic state of the U/D input. The CS
input is used to select the device.
The CAT5115 is a single digitally programmable
potentiometer (DPP™) designed as a electronic
replacement for mechanical potentiometers and trim
pots. Ideal for automated adjustments on high volume
production lines, they are also well suited for
applications where equipment requiring periodic
adjustment is either difficult to access or located in a
hazardous or remote environment.
The digitally programmable potentiometer can be
used as a three-terminal resistive divider or as a
two-terminal variable resistor. DPPs bring variability and
programmability to a wide variety of applications
including control, parameter adjustments, and
signal processing.
The CAT5115 contains a 32-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 is always set to the mid point, tap
15 at power up. The tap position is not stored in memory.
Wiper-control of the CAT5115 is accomplished with
three input control pins, CS, U/D, and INC. The INC
input increments the wiper in the direction which is
For a pin-compatible device that recalls a stored tap
position on power-up refer to the CAT5114 data sheet.
FUNCTIONAL DIAGRAM
Vcc (Supply Voltage)
U/D
INC
CS
R H / VH
31
5-BIT
UP/DOWN
COUNTER
VH /R H
30
R H / VH
UP/DOWN
(U/D)
INCREMENT
(INC)
29
Control
and
Memory
R W / VW
POR
R L / VL
DEVICE SELECT
(CS)
ONE
28
OF
THIRTY TWO
DECODER
TRANSFER
GATES
VW / R W
RESISTOR
ARRAY
2
Vcc
GND
1
CONTROL
CIRCUITRY
VSS
0
GENERAL
© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
VL / R L
R L / VL
R W / VW
GENERAL
DETAILED
1
ELECTRONIC POTENTIOMETER
IMPLEMENTATION
Doc. No. 2117, Rev. E
CAT5115
PIN CONFIGURATION
PIN FUNCTIONS
DIP Package (P, L)
INC
U/D
RH
GND
1
8
VCC
2
7
3
6
CS
RL
4
5
RW
TSSOP Package (U, Y)
CS
VCC
INC
U/D
SOIC Package (S, V)
INC
U/D
RH
GND
1
2
3
4
8
7
6
5
Pin Name
RL
INC
Increment Control
RW
GND
RH
U/D
Up/Down Control
RH
Potentiometer High Terminal
GND
Ground
RW
Potentiometer Wiper Terminal
MSOP Package (R, Z)
1
8
VCC
2
7
3
6
CS
RL
INC
U/D
RH
4
5
RW
GND
Function
1
2
8
7
VCC
CS
RL
Potentiometer Low Terminal
3
4
6
5
RL
RW
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 CAT5115 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.
DEVICE OPERATION
The CAT5115 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 32 available tap
positions including the resistor end points, RH and RL.
There are 31 resistor elements connected in series
between the RH and RL terminals. The wiper terminal is
connected to one of the 32 taps and controlled by three
inputs, INC, U/D and CS. These inputs control a five-bit
up/down counter whose output is decoded to select the
wiper position.
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.
With CS set LOW the CAT5115 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 fivebit counter). The wiper, when at either fixed terminal,
acts like its mechanical equivalent and does not move
beyond the last position. When the CAT5115 is powereddown, the wiper position is reset. When power is restored,
the counter is set to the mid point, tap 15.
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. 2117, Rev. E
2
CAT5115
OPERATION MODES
INCBB
CSBB
RH
U/DB
Operation
High to Low
Low
High
Wiper toward H
High to Low
Low
Low
Wiper toward L
X
High
X
Standby
CH
Rwi
RW
CW
CL
RL
Potentiometer
Equivalent Circuit
Operating Ambient Temperature
Industrial (‘I’ suffix) ...................... – 40°C to +85°C
Junction Temperature ..................................... +150°C
Storage Temperature ....................... –65°C to +150°C
Lead Soldering (10 sec max) .......................... +300°C
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
VCC to GND ...................................... –0.5V to +7V
Inputs
CS to GND .............................–0.5V to VCC +0.5V
INC to GND ............................–0.5V to VCC +0.5V
U/D to GND ............................–0.5V to VCC +0.5V
H to GND ................................–0.5V to VCC +0.5V
L to GND ................................–0.5V to VCC +0.5V
W to GND ............................... –0.5V to VCC +0.5V
* 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
Operating Voltage Range
Supply Current (Increment)
ICC2
Supply Current (Write)
ISB1 (2)
Supply Current (Standby)
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
Max
2000
100
100
1,000,000
DC Electrical Characteristics: VCC = +2.5V to +5.5V unless otherwise specified
Power Supply
Symbol Parameter
Conditions
Min
VCC
ICC1
Typ
Units
Volts
mA
Years
Stores
Typ
Max
Units
2.5
—
—
—
—
—
—
—
—
—
5.5
100
50
1
500
mA
µA
—
—
1
µA
Min
Typ
Max
Units
V
µA
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
—
—
2
0
—
—
—
—
10
–10
VCC
0.8
µA
µA
V
V
VIH2
CMOS High Level Input Voltage
2.5V ≤ VCC ≤ 5.5V
VCC x 0.7
—
VCC + 0.3
V
VIL2
CMOS Low Level Input Voltage
-0.3
—
VCC x 0.2
V
NOTES:
(1)
(2)
(3)
(4)
This parameter is tested initially and after a design or process change that affects the parameter.
Latch-up protection is provided for stresses up to 100mA on address and data pins from –1V to VCC + 1V
IW=source or sink
These parameters are periodically sampled and are not 100% tested.
3
Doc. No. 2117, Rev. E
CAT5115
Potentiometer Parameters
Symbol
RPOT
Parameter
Conditions
Min
Typ
Potentiometer Resistance
-10 Device
10
-50 Device
50
-00 Device
100
Pot Resistance Tolerance
Max
Units
kΩ
± 20
%
VRH
Voltage on RH pin
0
VCC
V
VRL
Voltage on RL pin
0
VCC
V
Resolution
3.2
%
INL
Integral Linearity Error
IW ≤ 2µA
0.5
1
LSB
DNL
Differential Linearity Error
IW ≤ 2µA
0.25
0.5
LSB
RWi
Wiper Resistance
VCC = 5V, IW = 1mA
400
Ω
1
kΩ
1
mA
VCC = 2.5V, IW = 1mA
IW
Wiper Current
TCRPOT
TC of Pot Resistance
TCRATIO
Ratiometric TC
VN
CH/CL/CW
fc
Doc. No. 2117, Rev. E
Noise
20
100kHz / 1kHz
Potentiometer Capacitances
Frequency Response
ppm/oC
300
Passive Attenuator, 10kΩ
4
ppm/oC
8/24
nV/√Hz
8/8/25
pF
1.7
MHz
CAT5115
AC CONDITIONS OF TEST
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
Parameter
Min
Typ(1)
Max
Units
tCI
tDI
tID
tIL
tIH
tIC
tCPH
tCPH
tIW
tCYC
tR, tF(2)
tPU(2)
tWR
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
—
1
—
—
—
—
—
—
—
—
—
—
—
1
—
—
—
5
—
—
—
—
—
—
—
—
5
—
500
1
10
ns
ns
ns
ns
ns
µs
ns
ms
µs
µs
µs
msec
ms
A. C. TIMING
CS
(store)
tCYC
tCI
tIL
tIC
tIH
tCPH
90%
INC
90%
10%
tDI
tID
tF
U/D
tR
MI (3)
tIW
RW
(1) Typical values are for TA=25oC and nominal supply voltage.
(2) This parameter is periodically sampled and not 100% tested.
(3) MI in the A.C. Timing diagram refers to the minimum incremental change in the W output due to a change in the wiper position.
5
Doc. No. 2117, Rev. E
CAT5115
APPLICATIONS INFORMATION
Potentiometer Configurations
(a) resistive divider
(b) variable resistance
(c) two-port
Applications
3
V1
(-)
2
A1
+
1
R3
+5V
R4
–
+5V
+5V
+5V
DPP
9
U/
R1
R2
10
R2
–
+
4
8
A3
U/
VO
8
2
1
7
RA
11
4
RB
CAT5114/5113/5115
V2
(+)
6
5
–
+
A2
R4
R3
+2.5V
7
{
{
R1
6
5
3
}
}
pRPOT
7
4
8
3
(1-p)RPOT
555
R2
5
6
2
1
C
.01 F
.01 F,
.003 F
Programmable Instrumentation Amplifier
Programmable Sq. Wave Oscillator (555)
IC3A
1/4 74HC132
7
OSC
+5V
10k
0.01 F
20k
+200mV
U/D
1.00V = VREF
ICIB
+5V
2
Sensor
3
499k
CAT5112/5111
IC2
–
+
4
11
-5V
499k
1V + 50mV
VSENSR
Sensor Auto Referencing Circuit
Doc. No. 2117, Rev. E
+
5
–
CS
CS
6
499k
VCORR 499k
+
INC
–
6
1
VOUT = 1V + 1mV
ICIA
100mV = VSHIFT
CAT5115
APPLICATIONS INFORMATION
100k
+5V
8
2
U/
CAT5114/5113
1
VOUT
7
V0 (REG)
4
2952
R1
11k
VIN (UNREG)
6.8 F
1.23V
FB
SD
GND
6
7
3
+5V
2
–
7
3
+
4
10k
6
2
–
7
3
+
4
A1
6
VO
A2
IS
R3
10k
5
Control
and
Memory
POR
1M
5
8
1
330
3
+5V
R2
820
+5V
2
(1-p)R
}
}
.1
1 F
LT1097
6
+2.5V
CAT5114/5113/5115
4
Programmable Voltage Regulator
Programmable I to V convertor
R1
100k
CAT5112/5111
R1
50k
–
C2
2
VS
.001
+5V
+5V
+5V
3
Serial
Bus
7
–
6
+
VS
+
R1
+2.5V
VO
4
R1
100k
+5V
2
–
3
+
41
R
2.5k
IS
11
100k
R1
100k
A1
R2
10k
7
A2
5
–
R3
100k
C1
.001
1 F
+5V
+
U/
pR
330
SHUTDOWN
6
+2.5V
+2.5V
A1=A2=1/4 LMC6064A
CAT5114/5113
Programmable Bandpass Filter
Programmable Current Source/Sink
+5V
IC1
393
IC2
74HC132
1
OSC
CLO
–
+
2
R1
VLL
3
R2
–
+
7
10k
0.1 F
CHI
IC3
CAT5114/5113
6
5
R3
+5V
VUL
+5V
+5V
8
2 U/D
1
INC
7
CS
6
10k
4
5
3
–
+
VO
AI
IC4
2.5V < VO < 5V
VS +2.5V
0 < VS < 2.5V
Automatic Gain Control
7
Doc. No. 2117, Rev. E
CAT5115
ORDERING INFORMATION
Prefix
CAT
Optional
Company ID
Device #
5115
Suffix
S
I
-10
Resistance
-10: 10kohms
-50: 50kohms
-00: 100kohms
Product Number
TE13
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 CAT5115 SI-10TE13 (SOIC, 10K Ohms, Industrial Temperature, Tape & Reel)
Doc. No. 2117, Rev. E
8
CAT5115
REVISION HISTORY
Date
Rev.
Reason
9/25/2003
B
Changed designation to Preliminary
Updated Description
Updated Potentiometer Parameters table
3/10/2004
C
Updated Potentiometer Parameters table
3/29/2004
D
Changed Green Package marking for SOIC from W to V
4/12/2004
E
Updated Reel Ordering Information
Copyrights, Trademarks and Patents
Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:
DPP ™
AE2 ™
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issued to Catalyst Semiconductor contact the Company’s corporate office at 408.542.1000.
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OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
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:
9
2117
E
4/12/04
Preliminary
Doc. No. 2117, Rev. E