CAT5112UI-20TE13 [CATALYST]
32-Tap Digitally Programmable Potentiometer (DPP⑩); 32抽头数字可编程电位计（ DPP ™ ）
| 型号： | CAT5112UI-20TE13 |
| 厂家： | 
CATALYST SEMICONDUCTOR |
| 描述： | 32-Tap Digitally Programmable Potentiometer (DPP⑩) |
| 文件： | 总6页 (文件大小：39K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Advance Information
CAT5112
32-Tap Digitally Programmable Potentiometer (DPP™)
FEATURES
APPLICATIONS
■ 32 Position Linear Taper Potentiometer
■ Non-volatile NVRAM Wiper Storage
■ Low Power CMOS Technology
■ Automated Product Calibration
■ Remote Control Adjustments
■ Offset, Gain and Zero Control Systems
■ Tamper-Proof Calibrations
■ Single Supply Operation: 2.5V-6.0V
■ Increment Up/Down Serial Interface
■ Resistance Values: 10K, 20K, 50K and 100K Ω
■ Available in PDIP, SOIC, TSSOP and MSOP packages
■ Contrast, Brightness and Volume Controls
■ Motor Controls and Feedback Systems
■ Programmable Analog Functions
DESCRIPTION
when power is returned. The wiper can be adjusted to
test new system values without effecting the stored
setting. Wiper-control of the CAT5112 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 CAT5112 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 CAT5112 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 CAT5112 wiper is buffered by an OP
AMP that operates rail to rail. The wiper setting, stored
in non-volatile NVRAM memory, is not lost when the
device is powered down and is automatically recalled
The digitally programmable potentiometer can be
used as a three-terminal resistive divider or as a
two-terminalvariableresistor.DPPsbringvariabilityand
programmability to a wide variety of applications
including control, parameter adjustments, and
signal processing.
FUNCTIONAL DIAGRAM
V
CC
VH /RH
R
H
U/D
Control
and
Memory
R
/
VW
W
+
–
INC
CS
R
R
WB
L
VL / RL
Implementation of the
Electronic Potentiometer
V
SS
© 2001 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc. No. 25091-00 Rev. 3/28/01
M-1
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CAT5112
Advance Information
PIN CONFIGURATION
DIP/SOIC Package
PIN FUNCTIONS
Pin Name
Function
TSSOP Package
MSOP Package
INC
Increment Control
Up/Down Control
RL
CS
V
INC
CC
V
U/D
CC
RW
CS
RL
U/D
RH
GND
RH
INC
R
Potentiometer High Terminal
Ground
H
U/D
GND
RW
GND
R
R
Potentiometer Wiper Terminal
Potentiometer Low Terminal
Chip Select
W
L
INC
U/D
RH
VCC
CS
RL
CS
GND
RW
VCC
Supply Voltage
PIN DESCRIPTIONS
INC: Increment Control Input
of the CAT5112 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.
TheINCinputmovesthewiperintheupordowndirection
determined by the condition of the U/D input.
U/D: Up/Down Control Input
DEVICE OPERATION
The U/D input controls the direction of the wiper
movement. When in a high state andCS is low, any high-
to-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.
The CAT5112 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 posi-
tions 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. The selected wiper position can be
stored in nonvolatile memory using the INC and
CS inputs.
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 CAT5112 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 five-
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
CAT5112ispowered-down,thelaststoredwipercounter
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.
RW: Wiper Potentiometer Terminal
RW is the wiper terminal of the potentiometer. Its position
ontheresistorarrayiscontrolledbythecontrol inputs,INC,
U/D and CS. Voltage applied to the RW terminal cannot
exceedthesupplyvoltage, VCC orgobelowground, 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. RL and RH are electrically
interchangeable.
With INC set low, the CAT5112 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.
CS: Chip Select
The chip select input is used to activate the control input
Doc. No. 25091-00 Rev. 3/01
M-1
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CAT5112
Advance Information
OPERATION MODES
R
H
INC
High to Low
High to Low
High
CS
U/D
High
Low
X
Operation
W toward H
C
H
R
wi
Low
Low
R
W
W toward L
C
W
Low to High
Low to High
High
Store Wiper Position
No Store, Return to Standby
Standby
Low
X
C
Potentiometer
Equivalent Circuit
L
X
X
R
L
Operating Ambient Temperature
ABSOLUTE MAXIMUM RATINGS
Commercial (‘C’ suffix) .................... 0°C to +70°C
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
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
HtoGND ................................–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
maybeimpairedbyexposuretoabsoluteratingconditionsforextended
periods of time.
RELIABILITY CHARACTERISTICS
Symbol
Parameter
Min
Max
Units
Test Method
(1)
VZAP
ESD Susceptibility
Latch-Up
2000
100
Volts
mA
MIL-STD-883, Test Method 3015
JEDEC Standard 17
(1)(2)
ILTH
TDR
Data Retention
Endurance
100
Years
Stores
MIL-STD-883, Test Method 1008
MIL-STD-883, Test Method 1003
NEND
1,000,000
DC Electrical Characteristics: VCC = +2.5V to +6.0V unless otherwise specified
Power Supply
Symbol Parameter
Conditions
Min
Typ
Max Units
VCC
ICC1
Operating Voltage Range
2.5
—
6.0
V
Supply Current (Increment) CAT5114
VCC = 6V, f = 1MHz, IW=0
—
—
—
—
100
50
µA
VCC = 6V, f = 250KHz, IW=0
ICC2
Supply Current (Write)
Programming, VCC = 6V
VCC = 3V
—
—
—
—
1
mA
500
µA
(2)
ISB1
Supply Current (Standby)
CAT5114
CS=VCC-0.3V
—
—
1
µA
U/D, INC=VCC-0.3V or GND
Logic Inputs
Symbol Parameter
Conditions
Min
Typ
Max
Units
IIH
Input Leakage Current
VIN = VCC
—
—
—
—
—
—
—
10
–10
µA
µA
V
IIL
Input Leakage Current
VIN = 0V
—
VIH1
VIL1
VIH2
VIL2
TTL High Level Input Voltage
TTL Low Level Input Voltage
4.5V ≤ VCC ≤ 5.5V
2
0
VCC
0.8
V
CMOS High Level Input Voltage
CMOS Low Level Input Voltage
2.5V ≤ VCC ≤ 6V
VCC x 0.7
-0.3
VCC + 0.3
VCC x 0.2
V
V
NOTES: (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
(4) These parameters are periodically sampled and are not 100% tested.
Doc. No. 25091-00 Rev. 3/01
M-1
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CAT5112
Advance Information
Potentiometer Parameters
Symbol
RPOT
Parameter
Conditions
Min
Typ
Max Units
Potentiometer Resistance
10KΩ
20KΩ
50KΩ
100KΩ
Pot Resistance Tolerance
Voltage on RH pin
±15
VCC
VCC
%
V
VRH
VRL
OV
OV
Voltage on RL pin
Resolution
V
3.2
%
INL
DNL
RWi
Integral Linearity Error
Differential Linearity Error
Wiper Resistance
I
I
W ≤ 2µA
W ≤ 2µA
0.5
1
LSB
LSB
0.25
.5
VCC = 5V, IW = 1mA
VCC = 2.5V, IW = 1mA
400
1K
Ω
Ω
IW
TCRPOT
TCRATIO
RISO
Wiper Current
1
mA
ppm/oC
ppm/oC
Ω
TC of Pot Resistance
Ratiometric TC
Isolation Resistance
Noise
VN
nV/√Hz
pF
CH/CL/CW
Potentiometer Capacitances
10/10/25
Doc. No. 25091-00 Rev. 3/01
M-1
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CAT5112
Advance Information
AC CONDITIONS OF TEST
V
CC
Range
2.5V ≤ V
≤ 6V
CC
Input Pulse Levels
0.2V to 0.7V
CC CC
Input Rise and Fall Times
Input Reference Levels
10ns
0.5V
CC
AC OPERATING CHARACTERISTICS:
VCC = +2.5V to +6.0V, VH = VCC, VL = 0V, unless otherwise specified
Limits
Typ(1)
Symbol Parameter
Min
Max
Units
tCI
CS to INC Setup
100
50
100
250
250
1
—
—
—
—
—
—
—
—
1
—
—
ns
ns
tDI
U/D to INC Setup
tID
U/D to INC Hold
—
ns
tIL
INC LOW Period
—
ns
tIH
INC HIGH Period
—
ns
tIC
INC Inactive to CS Inactive
CS Deselect Time (NO STORE)
CS Deselect Time (STORE)
INC to VOUT Change
INC Cycle Time
—
µs
tCPH
tCPH
tIW
100
10
—
—
ns
—
ms
µs
5
tCYC
1
—
—
—
—
5
—
µs
(2)
tR, tF
INC Input Rise and Fall Time
Power-up to Wiper Stable
VCC Power-up Rate
Store Cycle
—
500
1 msec
50
µs
(2)
tPU
tR VCC
tWR
—
msec
V/ms
ms
(2)
0.2
—
10
A. C. TIMING
CS
(store)
tCYC
tIC
tCPH
tCI
tIL
tIH
90%
90%
INC
10%
tID
tDI
tR
tF
U/D
(3)
tIW
MI
W
o
(1) Typical values are for T =25 C and nominal supply voltage.
A
(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.
Doc. No. 25091-00 Rev. 3/01
M-1
5
CAT5112
Advance Information
ORDERING INFORMATION
Prefix
Device #
5112
Suffix
-10
CAT
S
I
TE13
Product Number
5112: Buffered
Package
P: PDIP
S: SOIC
U: TSSOP
R: MSOP
Resistance
Optional
Company ID
Tape & Reel
TE13: 2000/Reel
-10: 10K Ohms
-20: 20K Ohms
-50: 50K Ohms
-00: 100K Ohms
Temperature Range
Blank = Commercial (0°C to +70°C)
I = Industrial (-40°C to +85°C)
Notes:
(1) The device used in the above example is a CAT5112 SI-10TE13 (SOIC, 10K Ohms, Industrial Temperature, Tape & Reel)
Doc. No. 25091-00 Rev. 3/01
M-1
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