Semiconductor Components Industries, LLC, 2013
July, 2013 − Rev. 5
1Publication Order Number:
CAT5133/D
CAT5133
16 Volt Digital
Potentiometer (POT) with
128 Taps and an Increment
Decrement Interface
Description
The CAT5133 is a high voltage digital POT integrated with
EEPROM memory and control logic to operate in a similar manner to
a mechanical potentiometer. The digital ponentiometer consists of a
series of resistive elements connected between two externally
accessible end points. The tap points between each resistive element
are connected to the wiper outputs with CMOS switches. A 7-bit wiper
control register (WCR) independently controls the wiper tap switches
for the digital potentiometer. Associated with the control register is a
7-bit nonvolatile memory data register (DR) used for storing the wiper
settings. Changing the value of the wiper control register or storing
that value into the nonvolatile memory is performed via a 3-input
Increment-Decrement interface.
The CAT5133 comes with 2 voltage supply inputs: VCC (digital
supply voltage) input and V+ (analog bias supply) input. Providing
separate Digital and Analog inputs allow the potentiometer terminals
to be as much as 10 volts above VCC and 16 volts above ground.
The CAT5133 can be used as a potentiometer or as a two terminal,
variable resistor. It is designed for circuit level or system level
adjustments in a wide variety of applications.
On power-up, the contents of the nonvolatile data register (DR) are
transferred to the wiper control register (WCR) and the wiper is
positioned to that location. The CAT5133 is shipped with the DR
programmed to position 64.
Features
Single Linear Digital Potentiometer with 128 Taps
End-to-End Resistance of 10 kW, 50 kW or 100 kW
2-wire Interface
Fast Up/Down Wiper Control Mode
Non-volatile Wiper Setting Storage
Automatic Wiper Setting Recall at Power−up
Digital Supply Range (VCC): 2.7 V to 5.5 V
Analog Supply Range (V+): +8 V to +16 V
Low Standby Current: 15 mA
100 Year Wiper Setting Memory
Industrial Temperature Range: −40C to +85C
10-pin MSOP Package
These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
LCD Screen Adjustment
Volume Control
Mechanical Potentiometer Replacement
Gain Adjustment
Line Impedance Matching
VCOM Settings Adjustment
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MSOP−10
Z SUFFIX
CASE 846AE
PIN CONNECTIONS
(Top View)
INC
U/D
GND
VCC
1
CS
N/C
V+
RL
RW
RH
Device Package Shipping†
ORDERING INFORMATION
CAT5133ZI−10−GT3 MSOP−10
(Pb−Free)
3,000/
Tape & Reel
CAT5133ZI−00−GT3
(Note 4)
MSOP−10
(Pb−Free)
3,000/
Tape & Reel
CAT5133ZI−50−GT3
(Note 4)
MSOP−10
(Pb−Free)
3,000/
Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
1. For detailed information and a breakdown of
device nomenclature and numbering systems,
please see the ON Semiconductor Device No-
menclature document, TND310/D, available at
www.onsemi.com.
2. All packages are RoHS-compliant (Lead-Free,
Halogen-Free).
3. The standard lead finish is NiPdAu.
4. For additional package and temperature options,
please contact your nearest ON Semiconductor
Sales office.
CAT5133
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2
Figure 1. Block Diagram
RH
RL
RW
127
0
V+
127 Resistive
Elements
128 Tap Position
Decode Control
VCC
Control Logic and
Address Decode
7−Bit Wiper
Control
Register
(WCR)
7−Bit
Nonvolatile
Memory
Register
(DR)
UP/DOWN
(U/D)
Device Select
(CS)
Increment
(INC)
Table 1. PIN DESCRIPTIONS
Pin Name Function
1 U/D Up/Down Data Input – Determines the direction of movement of the wiper
2 GND Ground
3 VCC Logic Supply Voltage (2.7 V to 5.5 V)
4 CS Chip Select − The chip is selected when the input is low.
5 N/C No Connect
6 RHHigh Reference Terminal for the Potentiometer
7 RWWiper Terminal for the Potentiometer
8 RLLow Reference Terminal for the Potentiometer
9 V+Analog Bias Voltage Input (+8.0 V to +16.0 V)
10 INC Increment Input – Moves the wiper in the direction determined by the Up/Down input on each negative edge
Device Operation
The CAT5133 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 128 available tap positions
including the resistor end points, RH and RL. There are 127
resistor elements connected in series between the RH and RL
terminals. The wiper terminal is connected to one of the 128
taps and controlled by three inputs, INC, U/D and CS. These
inputs control a 7-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 CAT5133 is selected and will
respond to the U/D and INC inputs. HIGH to LOW
transitions on INC will increment or decrement the wiper
(depending on the state of the U/D input and 7-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 CAT5133 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 CAT5133 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.
CAT5133
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Table 2. OPERATION MODES
INC CS U/D Operation
High to Low Low High Wiper toward H
High to Low Low Low Wiper toward L
High Low to High XStore Wiper
Position
Low Low to High XNo Store, Return
to Standby
X High X Standby Figure 2. Potentiometer Equivalent Circuit
RW
CW
RW
RL
CL
CH
RH
Power-On and Potentiometer Characteristics
The CAT5133 is a 128-position, digital controlled
potentiometer. When applying power to the CAT5133, VCC
must be supplied prior to or simultaneously with V+. At the
same time, the signals on RH, RW and RL terminals should
not exceed V+. If V+ is applied before VCC, the electronic
switches of the digital potentiometer are powered in the
absence of the switch control signals, that could result in
multiple switches being turned on. This causes unexpected
wiper settings and possible current overload of the
potentiometer.
When VCC is applied, the device turns on at the mid-point
wiper location (64) until the wiper register can be loaded
with the nonvolatile memory location previously stored in
the device. After the nonvolatile memory data is loaded into
the wiper register the wiper location will change to the
previously stored wiper position.
At power-down, it is recommended to turn-off first the
signals on RH, RW and RL, followed by V+ and, after that,
VCC, in order to avoid unexpected transitions of the wiper
and uncontrolled current overload of the potentiometer.
The end-to-end nominal resistance of the potentiometer
has 128 contact points linearly distributed across the total
resistor. Each of these contact points is addressed by the 7 bit
wiper register which is decoded to select one of these 128
contact points.
Each contact point generates a linear resistive value
between the 0 position and the 127 position. These values
can be determined by dividing the end-to-end value of the
potentiometer by 127. The 10 kW potentiometer has a
resistance of ~79 W between each wiper position. However
in addition to the ~79 W for each resistive segment of the
potentiometer, a wiper resistance offset must be considered.
Table 3 shows the effect of this value and how it would
appear on the wiper terminal.
This offset will appear in each of the CAT5133 end-to-end
resistance values in the same way as the 10 kW example.
However resistance between each wiper position for the
50 kW version will be ~395 W and for the 100 kW version
will be ~790 W.
Table 3. POTENTIOMETER RESISTANCE AND WIPER RESISTANCE OFFSET EFFECTS
Position Typical RW to RL Resistance for 10 kW
Digital Potentiometer
Position Typical RW to RH Resistance for 10 kW
Digital Potentiometer
070 W or 0 W + 70 W00 10,070 W or 10,000 W + 70 W
01 149 W or 79 W + 70 W64 5,047 W or 4,977 W + 70 W
63 5,047 W or 4,977 W + 70 W126 149 W or 79 W + 70 W
127 10,070 W or 10,000 W + 70 W127 70 W or 0 W + 70 W
Table 4. ABSOLUTE MAXIMUM RATINGS
Parameters Ratings Units
Temperature Under Bias −55 to +125 C
Storage Temperature −65 to +150 C
Voltage on any U/D, INC, & CS Pins with Respect to VCC (Note 5) −0.3 to +VCC + 0.3 V
Voltage on RH, RL, & RW Pins with Respect to VCC V+ V
VCC with Respect to Ground −0.3 to +6.0 V
V+ with respect to Ground −0.3 to +16.5 V
Wiper Current 6 mA
Lead Soldering temperature (10 seconds) +300 C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
5. Latch-up protection is provided for stresses up to 100 mA on the digital from −0.3 V to VCC + 0.3 V.
CAT5133
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Recommended Operating Conditions
VCC = +2.7 V to +5.5 V
V+ = +8.0 V to +16.0 V
Operating Temperature Range: −40C to +85C
Table 5. POTENTIOMETER CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Symbol Parameter Test Conditions
Limits
Units
Min Typ Max
RPOT Potentiometer Resistance (10 kW)10 kW
RPOT Potentiometer Resistance (50 kW)
(Note 12)
50 kW
RPOT Potentiometer Resistance (100 kW)
(Note 12)
100 kW
RTOL Potentiometer Resistance Tolerance 20 %
Power Rating 25C 50 mW
IWWiper Current 3 mA
RWWiper Resistance IW = +1 mA @ V+ = 12 V 70 150 W
IW = +1 mA @ V+ = 8 V 110 200
VTERM Voltage on RW, RH or RLGND = 0 V; V+ = 8 V to 16 V GND V+ V
RES Resolution 0.78 %
ALIN Absolute Linearity (Note 7) VW(n)(actual) − VW(n)(expected)
(Notes 10, 11)
1 LSB
(Note 9)
RLIN Relative Linearity (Note 8) VW(n+1) − [VW(n) +LSB]
(Notes 10, 11)
0.5 LSB
(Note 9)
TCRPOT Temperature Coefficient of RPOT (Note 6) 300 ppm/C
TCRatio Ratiometric Temperature Coefficient (Note 6) 30 ppm/C
CH/CL/CWPotentiometer Capacitances (Note 6) 10/10/25 pF
fc Frequency Response RPOT = 50 kW0.4 MHz
6. This parameter is tested initially and after a design or process change that affects the parameter.
7. Absolute linearity is utilized to determine actual wiper voltage versus expected voltage as determined by wiper position when used as a
potentiometer.
8. Relative linearity is utilized to determine the actual change in voltage between two successive tap positions when used as a potentiometer.
9. LSB = (RHM − RLM)/127; where RHM and RLM are the highest and lowest measured values on the wiper terminal.
10.n = 1, 2, ..., 127.
11. V+ @ RH; 0 V @ RL; VW measured @ RW, with no load.
12.Contact factory for availability on this version of the CAT5133.
CAT5133
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Table 6. DC ELECTRICAL CHARACTERISTICS (VCC = +2.7 V to +6.0 V, unless otherwise specified.)
Symbol Parameter Test Conditions Min Max Units
ICC1 Power Supply Current VCC = 5.5 V, fINC = 1 MHz, Input = GND 1 mA
ICC2 Power supply Current
Nonvolatile WRITE
VCC = 5.5 V, fINC = 1 MHz, Input = GND 3.0 mA
ISB(VCC) Standby Current (VCC = 5 V) VIN = GND or VCC, INC = VCC 5mA
ISB(V+) V+ Standby Current VCC = 5 V, V+ = 16 V 10 mA
ILI Input Leakage Current VIN = GND to VCC 10 mA
ILO Output Leakage Current VOUT = GND to VCC 10 mA
VIL Input Low Voltage −1 VCC x 0.3 V
VIH Input High Voltage VCC x 0.7 VCC + 1.0 V
VOL1 Output Low Voltage (VCC = 3.0 V) IOL = 3 mA 0.4 V
Table 7. CAPACITANCE (TA = 25C, f = 1.0 MHz, VCC = 5.0 V)
Symbol Parameter Test Conditions Min Max Units
CI/O Input/Output Capacitance (SDA) VI/O = 0 V (Note 13) 8 pF
CIN Input Capacitance (A0, A1, SCL) VIN = 0 V (Note 13) 6 pF
Table 8. POWER UP TIMING (Notes 13, 14)
Symbol Parameter Min Max Units
tPUR Power-up to Read Operation 1 ms
tPUW Power-up to Write Operation 1 ms
Table 9. WIPER TIMING
Symbol Parameter Min Max Units
tWRPO Wiper Response Time After Power Supply Stable 5 10 ms
tWRL Wiper Response Time After Instruction Issued 5 10 ms
Table 10. WRITE CYCLE LIMITS
Symbol Parameter Min Max Units
tWR Write Cycle Time 5 ms
Table 11. RELIABILITY CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.)
Symbol Parameter Reference Test Method Min Max Units
NEND (Note 13) Endurance MIL−STD−883, Test Method 1033 100,000 Cycles/Byte
TDR (Note 13) Data Retention MIL−STD−883, Test Method 1008 100 Years
13.This parameter is tested initially and after a design or process change that affects the parameter.
14.tPUR and tPUW are the delays required from the time VCC is stable until the time the specified operation can be initiated.
CAT5133
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Table 12. A.C. OPERATING CHARACTERISTICS (VCC = +2.5 V to +6.0 V, VH = VCC, VL = 0 V, unless otherwise specified.)
Symbol Parameter Min Typ (Note 15) Max Units
tCI CS to INC Setup 100 ns
tDI U/D to INC Setup 50 ns
tID U/D to INC Hold 100 ns
tIL INC LOW Period 250 ns
tIH INC HIGH Period 250 ns
tIC INC Inactive to CS Inactive 1ms
tCPH CS Deselect Time (NO STORE) 100 ns
tCPH CS Deselect Time (STORE) 10 ms
tIW INC to VOUT Change 1 5 ms
tCYC INC Cycle Time 1ms
tR, tF (Note 16) INC Input Rise and Fall Time 500 ms
tPU (Note 16) Power-up to Wiper Stable 1 ms
tWR Store Cycle 5 10 ms
Figure 3. A.C. Timing
(store)
90% 90%
10%
MI (Note 17)
tR
tF
tIC tCPH
tIW
RW
U/D
INC
CS
tCI
tDI tID
tCYC
tIL tIH
15.Typical values are for TA = 25C and nominal supply voltage.
16.This parameter is periodically sampled and not 100% tested.
17.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.
CAT5133
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TYPICAL PERFORMANCE CHARACTERISTICS
Figure 4. Resistance between RW and RLFigure 5. ICC2 (NV Write) vs. Temperature
TAP POSITION TEMPERATURE (C)
1129680644832160
0
2
4
6
8
10
12
11090705010−10−30−50
0
50
100
150
200
250
350
400
Figure 6. Absolute Linearity Error per Tap
Position
Figure 7. Relative Linearity Error
TAP POSITION TAP POSITION
1129680644832160
−1.0
−0.8
−0.4
−0.2
0
0.4
0.8
1.0
1129680644832160
−0.5
−0.4
−0.3
−0.1
0
0.2
0.3
0.5
RWL (KW)
ICC2 (mA)
ALIN ERROR (LSB)
RLIN ERROR (LSB)
128 30 130
300
VCC = 2.7 V
VCC = 5.5 V
128
−0.6
0.2
0.6
TAMB = 25C
Rtotal = 10 K
128
−0.2
0.1
0.4
VCC = 2.7 V; V+ = 8 V
VCC = 5.5 V; V+ = 16 V
TAMB = 25C
Rtotal = 10 K
VCC = 2.7 V; V+ = 8 V
VCC = 5.5 V; V+ = 16 V
VCC = 2.7 V; V+ = 8 V
VCC = 5.5 V; V+ = 16 V
CAT5133
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PACKAGE DIMENSIONS
MSOP 10, 3x3
CASE 846AE
ISSUE O
E1E
A2
A1 eb
D
c
A
TOP VIEW
SIDE VIEW
END VIEW
L1
L2
L
DETAIL A
DETAIL A
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-187.
q
SYMBOL MIN NOM MAX
θ
A
A1
A2
b
c
D
E
E1
e
L
0º 8º
L2
0.00
0.75
0.17
0.13
0.40
2.90
4.75
2.90
0.50 BSC
0.25 BSC
1.10
0.15
0.95
0.27
0.23
0.80
3.10
5.05
3.10
0.60
3.00
4.90
3.00
L1 0.95 REF
0.05
0.85
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CAT5133/D
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