CAT5133 16 Volt Digital Potentiometer (POT) with 128 Taps and an Increment Decrement Interface Description http://onsemi.com 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 MSOP−10 Z SUFFIX CASE 846AE PIN CONNECTIONS 1 U/D INC GND V+ VCC RL CS RW N/C RH (Top View) ORDERING INFORMATION Device Package Shipping† CAT5133ZI−10−GT3 MSOP−10 (Pb−Free) 3,000/ Tape & Reel CAT5133ZI−50−GT3 (Note 4) MSOP−10 (Pb−Free) 3,000/ Tape & Reel CAT5133ZI−00−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 Nomenclature 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. Applications LCD Screen Adjustment Volume Control Mechanical Potentiometer Replacement Semiconductor Components Industries, LLC, 2013 July, 2013 − Rev. 5 Gain Adjustment Line Impedance Matching VCOM Settings Adjustment 1 Publication Order Number: CAT5133/D CAT5133 VCC V+ UP/DOWN (U/D) 127 Increment (INC) RH 7−Bit Nonvolatile Memory Register (DR) 128 Tap Position Decode Control 7−Bit Wiper Control Register (WCR) 0 Figure 1. Block Diagram Elements Device Select (CS) 127 Resistive Control Logic and Address Decode RL RW 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 RH High Reference Terminal for the Potentiometer 7 RW Wiper Terminal for the Potentiometer 8 RL Low 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. http://onsemi.com 2 CAT5133 RH 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 X Store Wiper Position Low Low to High X No Store, Return to Standby X High X Standby CH RW RW CW CL RL Figure 2. Potentiometer Equivalent Circuit Power-On and Potentiometer Characteristics 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. 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. Table 3. POTENTIOMETER RESISTANCE AND WIPER RESISTANCE OFFSET EFFECTS Position Position Typical RW to RL Resistance for 10 kW Digital Potentiometer 0 70 W or 0 W + 70 W Typical RW to RH Resistance for 10 kW Digital Potentiometer 00 10,070 W or 10,000 W + 70 W 01 149 W or 79 W + 70 W 64 5,047 W or 4,977 W + 70 W 63 5,047 W or 4,977 W + 70 W 126 149 W or 79 W + 70 W 127 10,070 W or 10,000 W + 70 W 127 70 W or 0 W + 70 W Table 4. ABSOLUTE MAXIMUM RATINGS Parameters Temperature Under Bias Storage Temperature Voltage on any U/D, INC, & CS Pins with Respect to VCC (Note 5) Voltage on RH, RL, & RW Pins with Respect to VCC Ratings Units −55 to +125 C −65 to +150 C −0.3 to +VCC + 0.3 V V+ V VCC with Respect to Ground −0.3 to +6.0 V V+ with respect to Ground −0.3 to +16.5 V 6 mA +300 C Wiper Current Lead Soldering temperature (10 seconds) 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. http://onsemi.com 3 CAT5133 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.) Limits Parameter Symbol Test Conditions Min Typ Max Units 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 Power Rating IW Wiper Current RW Wiper Resistance VTERM Voltage on RW, RH or RL 25C 20 % 50 mW 3 mA W IW = +1 mA @ V+ = 12 V 70 150 IW = +1 mA @ V+ = 8 V 110 200 GND = 0 V; V+ = 8 V to 16 V GND V+ 0.78 V RES Resolution % 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) TCRatio Ratiometric Temperature Coefficient (Note 6) Potentiometer Capacitances (Note 6) 10/10/25 pF RPOT = 50 kW 0.4 MHz CH/CL/CW fc Frequency Response ppm/C 300 30 ppm/C 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. http://onsemi.com 4 CAT5133 Table 6. DC ELECTRICAL CHARACTERISTICS (VCC = +2.7 V to +6.0 V, unless otherwise specified.) Parameter Symbol 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 Standby Current (VCC = 5 V) VIN = GND or VCC, INC = VCC 5 mA 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 0.4 V Max Units ISB(VCC) ISB(V+) VOL1 Output Low Voltage (VCC = 3.0 V) IOL = 3 mA Table 7. CAPACITANCE (TA = 25C, f = 1.0 MHz, VCC = 5.0 V) Parameter Symbol Test Conditions Min 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) Max Units tPUR Power-up to Read Operation Parameter 1 ms tPUW Power-up to Write Operation 1 ms Min Max Units Wiper Response Time After Power Supply Stable 5 10 ms Wiper Response Time After Instruction Issued 5 10 ms Min Max Units 5 ms Symbol Min Table 9. WIPER TIMING Symbol tWRPO tWRL Parameter Table 10. WRITE CYCLE LIMITS Symbol tWR Parameter Write Cycle Time Table 11. RELIABILITY CHARACTERISTICS (Over recommended operating conditions unless otherwise stated.) Symbol NEND (Note 13) TDR (Note 13) Parameter Reference Test Method Min Max Units Endurance MIL−STD−883, Test Method 1033 100,000 Cycles/Byte 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. http://onsemi.com 5 CAT5133 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 1 ms tCPH CS Deselect Time (NO STORE) 100 ns tCPH CS Deselect Time (STORE) 10 ms tIW INC to VOUT Change tCYC 1 INC Cycle Time tR, tF (Note 16) 5 1 ms INC Input Rise and Fall Time tPU (Note 16) Power-up to Wiper Stable tWR ms Store Cycle 5 500 ms 1 ms 10 ms CS tCI tIL tCYC (store) tIC tIH tCPH 90% INC tDI 90% 10% tID tF U/D tR MI (Note 17) tIW RW Figure 3. A.C. Timing 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. http://onsemi.com 6 CAT5133 TYPICAL PERFORMANCE CHARACTERISTICS 400 12 VCC = 2.7 V; V+ = 8 V VCC = 5.5 V; V+ = 16 V 10 VCC = 5.5 V 350 300 ICC2 (mA) RWL (KW) 8 6 4 250 VCC = 2.7 V 200 150 100 2 0 50 0 32 48 64 80 96 112 0 −50 −30 128 50 70 90 110 130 Figure 4. Resistance between RW and RL Figure 5. ICC2 (NV Write) vs. Temperature 0.5 0.4 TAMB = 25C Rtotal = 10 K RLIN ERROR (LSB) 0.4 0 −0.2 −0.4 −0.6 32 48 64 80 96 112 0.2 0.1 0 −0.1 −0.2 −0.3 VCC = 2.7 V; V+ = 8 V VCC = 5.5 V; V+ = 16 V 16 TAMB = 25C Rtotal = 10 K 0.3 0.2 0 30 10 TEMPERATURE (C) 0.8 −0.8 −1.0 −10 TAP POSITION 1.0 0.6 ALIN ERROR (LSB) 16 −0.4 −0.5 128 VCC = 2.7 V; V+ = 8 V VCC = 5.5 V; V+ = 16 V 0 16 32 48 64 80 96 TAP POSITION TAP POSITION Figure 6. Absolute Linearity Error per Tap Position Figure 7. Relative Linearity Error http://onsemi.com 7 112 128 CAT5133 PACKAGE DIMENSIONS MSOP 10, 3x3 CASE 846AE ISSUE O SYMBOL MIN NOM A E E1 MAX 1.10 A1 0.00 0.05 0.15 A2 0.75 0.85 0.95 b 0.17 0.27 c 0.13 D 2.90 3.00 3.10 E 4.75 4.90 5.05 E1 2.90 3.00 3.10 e L 0.50 BSC 0.40 L1 0.60 0.80 0.95 REF L2 θ 0.23 0.25 BSC 0º 8º DETAIL A TOP VIEW D A A2 END VIEW c A1 e b SIDE VIEW q L2 L Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-187. L1 DETAIL A ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. 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