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CAT5116
Log-Taper, 100-Tap Digitally Programmable Potentiometer (DPP™)
FEATURES
APPLICATIONS
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CAT5116
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TM
■ 100-position, log-taper potentiometer
■ Non-volatile EEPROM wiper storage
■ 10nA ultra-low standby current
■ Single-supply operation: 2.5V - 5.5V
■ Increment Up/Down serial interface
■ Resistance value: 32k
ΩΩ
Ω
ΩΩ
■ Ava i la b le i n 8-pin MSOP, TSSOP, SOIC and DIP packages
DESCRIPTION
The CAT5116 is a log-taper 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, 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.
■ Automated product calibration
■ Remote control adjustments
■ Offset, gain and zero control
■ Audio volume control
■ Sensor adjustment
■ Motor controls and feedback systems
■ Programmable analog functions
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.
The wiper setting, stored in nonvolatile memory, is not
lost when the device is powered down and is
FUNCTIONAL DIAGRAM
V
CC
UP/DOWN
U/D
CONTROL
INCREMENT
INC
CHIP SELECT
CS
© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
AND
MEMORY
POR
GND
GENERAL BLOCK DIAGRAM POTENTIOMETER SCHEMATIC
R
H
R
W
R
L
U/D
INC
CS
V
CC
GND
INTERFACE
&
WIPER
CONTROL
EEPROM
Potentiometer
R = 32kΩ
1
1
R
R
H
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L
Doc. No. 2118, Rev. J
Doc. No. 2118, Rev. J
H
R
W
R
L
CAT5116
PIN CONFIGURATION
DIP Package (P, L)
1
INC
2
U/D
3
R
H
GND
4
SOIC Package (S, V)
1
INC
2
U/D
3
R
H
GND
4
8
V
CC
7
CS
6
R
L
5
R
W
8
V
CC
7
CS
6
R
L
5
R
W
TSSOP Package (U, Y)
1
CS
V
CC
INC
U/D
2
3
4
MSOP Package (R, Z)
1
INC
2
U/D
3
R
H
GND
4
8
R
L
7
R
W
6
GND
5
R
H
8
V
CC
7
CS
6
R
L
5
R
W
PIN DESCRIPTIONS
INCINC
INC: Increment Control Input
INCINC
The INC input moves the wiper in the up or down
direction determined by the condition of the U/D input.
DD
U/
D: Up/Down Control Input
DD
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.
PIN FUNCTIONS
Pin Name Function
INC Increment Control
U/D Up/Down Control
R
H
GND Ground
R
W
R
L
CS Chip Select
V
CC
CSCS
CS: Chip Select
CSCS
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.
Potentiometer High Terminal
Potentiometer Wiper Terminal
Potentiometer Low Terminal
Supply Voltage
R
High End Potentiometer Terminal
H:
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 R
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, V
or go below ground, GND.
CC
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 R
terminal cannot exceed the supply voltage, VCC or go
below ground, GND. RL and RH are electrically
interchangeable.
Doc. No. 2118, Rev. J
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2
ABSOLUTE MAXIMUM RATINGS
CAT5116
Supply Voltage
V
to GND ....................................... -0.5V to +7V
CC
Inputs
CS 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
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
*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 Min Typ Max Units
(1)
V
ZAP
(1)(2)
I
LTH
T
DR
N
END
DC ELECTRICAL CHARACTERISTICS: V
Power Supply
Symbol Parameter Conditions Min Typ Max Units
V
CC
(3)
I
CC1
I
CC2
ISB
1
ESD Susceptibility MIL-STD-883, Test Method 3015 2000 Volts
Latch-Up JEDEC Standard 17 100 mA
Data Retention MIL-STD-883, Test Method 1008 100 Years
Endurance MIL-STD-883, Test Method 1003 1,000,000 Stores
= 2.5V to 5.5V unless otherwise specified.
CC
Operating Voltage Range 2.5 5.5 V
Supply Current (Increment) VCC = 5.5V, f = 1MHz, IW=0 100 µA
VCC = 5.5V, f = 250kHz, IW=0 50
Supply Current (Write) Programming, VCC = 5.5V 1 mA
VCC = 3V 500 µA
Supply Current (Standby) CS=VCC-0.3V 0.01 1 µA
U/D, INC=VCC-0.3V or GND
Logic Inputs
Symbol Parameter Conditions Min Typ Max Units
I
IH
I
IL
V
IH1
V
IL1
V
IH2
V
IL2
NOTES: (1) This parameter is tested initially and after a design or process change that affects the parameter.
Input Leakage Current VIN = V
CC
10 µA
Input Leakage Current VIN = 0V -10 µA
TTL High Level Input Voltage 4.5V ≤ VCC ≤ 5.5V 2 V
CC
TTL Low Level Input Voltage 0 0.8 V
CMOS High Level Input Voltage 2.5V ≤ VCC ≤ 5.5V VCC x 0.7 VCC + 0.3 V
CMOS Low Level Input Voltage -0.3 VCC x 0.2 V
(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
V