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| CAT5120, CAT5121, CAT5122 16-Tap MiniPotTM Digitally Programmable Potentiometers with 2-Wire Interface FEATURES 0.3A Ultra-low standby current Single-supply operation: 2.7 V to 5.5 V Glitchless switching between resistor taps Power-on reset to midscale 2-wire up/down serial interface Resistance values: 10 k, 50 k and 100 k Available in SC-70 and SOT-23 packages DESCRIPTION CAT5120/5121/5122 linear-taper digitally programmable potentiometers perform the same function as a mechanical potentiometer or a variable resistor. These devices consist of a fixed resistor and a wiper contact with 16-tap points that are digitally controlled through a 2-wire up/down serial interface. The CAT5120 is configured as a potentiometer. The CAT5121 and CAT5122 are configured as variable resistors. See Pin Configurations for part functionality. Three resistance values are available: 10 k, 50 k and 100 k. These are available in space-saving 5-pin and 6-pin SC-70 and SOT-23 packages. APPLICATIONS LCD screen adjustment Volume control Mechanical potentiometer replacement Gain adjustment Line impedance matching FUNCTIONAL DIAGRAM H VDD GND For Ordering Information details, see page 10. 16-POSITION DECODER CS UP-DOWN COUNTER W U/D PIN CONFIGURATION SC-70 SOT-23 VDD 1 6 H VDD 1 SC-70 SOT-23 5 H L PIN DESCRIPTIONS Name VDD GND 4 CS Description Power Supply Ground Up/Down Control Input. With CS low, a low-to-high transition increments or decrements the wiper position. Chip Select Input. A high-to-low CS transition determines the mode: increment if U/D is high, or decrement if U/D is low. Low Terminal of Resistor Wiper Terminal of Resistor High Terminal of Resistor GND 2 5W GND 2 CAT5120 U/D 3 4 CS U/D 3 CAT5122 U/D SC-70 SOT-23 VDD 1 6 H CS L W H GND 2 5L CAT5121 U/D 3 4 CS (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 1 Doc. No. MD-2121 Rev. G CAT5120, CAT5121, CAT5122 ABSOLUTE MAXIMUM RATINGS (1) Parameters VDD to GND All Other Pins to GND Input and Output Latch-Up Immunity Maximum Continuous Current into H, L and W 100k 50k 10k Continuous Power Dissipation (TA = +70C) 5-pin SC-70(2) 6-pin SC-70(2) Operating Temperature Range Junction Temperature Storage Temperature Range Soldering Temperature (soldering, 10s) Ratings -0.3 to +6 -0.3 to (VDD + 0.3) 200 0.6 1.3 1.3 247 245 -40 to +85 +150 -65 to +150 +300 Units V V mA mA mW C C C C ELECTRICAL CHARACTERISTICS VDD = 2.7 V to 5.5 V, VH = VDD, VL = 0, TA = -40C to +85C. Typical values are at VDD = 2.7 V, TA = 25C, unless otherwise noted. Parameter DC Performance Resolution End-to-End Resistance (-00) End-to-End Resistance (-50) End-to-End Resistance (-10) End-to-End Resistance Tempco Ratiometric Resistance Tempco Integral Nonlinearity Differential Nonlinearity Zero/Full-Scale Error Wiper Resistance Digital Inputs Input High Voltage Input Low Voltage VIH VIL 0.7 x VDD 0.3 x VDD V V RW INL DNL 0.1 200 TCR 16 75 37.5 7.5 100 50 10 200 5 0.5 0.5 0.5 600 125 62.5 12.5 ppm/C ppm/C LSB LSB LSB k Taps Symbol Conditions Min Typ Max Units Notes: (1) Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability. (2) Derate 3.1mW/C above TA = +70C Doc. No. MD-2121 Rev. G 2 (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5120, CAT5121, CAT5122 ELECTRICAL CHARACTERISTICS (continued) Parameter U/D Mode to CS Setup CS to U/D Step Setup CS to U/D Step Hold U/D Step Low Period U/D Step High Period (1) Up/Down Toggle Rate Output Settling Time Power Supply Supply Voltage Active Supply Current (3) (4) (2) Symbol tCU tCI tIC tIL tIH fTOGGLE tSETTLE Conditions Min 25 50 25 25 25 Typ Max Units ns ns ns ns ns Timing Characteristics (Figures 1, 2) 1 100 k variable resistor configuration, CL = 10 pF 100 k potentiometer configuration, CL = 10 pF 2.7 VDD = +5 V 0.3 1 MHz s 0.25 VDD IDD ISB 5.5 25 1 V A A Standby Supply Current TYPICAL OPERATING CHARACTERISTICS TA = 25C, unless otherwise noted. VDD= 2.7V 50K VDD= 5.5V 0 4 8 12 16 20 24 WIPER POSITION 28 32 TEMPERATURE (C) VDD= 5.5V VDD= 2.7V TEMPERATURE (C) Notes: (1) (2) (3) (4) Up/Down Toggle Rate: fTOGGLE = 1 t SETTLE Typical settling times are dependent on end-to-end resistance. Supply current measured while changing wiper tap, fTOGGLE = 1 MHz. Supply current measured while wiper position is fixed. 3 Doc. No. MD-2121 Rev. G (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5120, CAT5121, CAT5122 FUNCTIONAL DESCRIPTION The CAT5120/5121/5122 consist of a fixed resistor and a wiper contact with 16-tap points that are digitally controlled through a 2-wire up/down serial interface. Three end-to-end resistance values are available: 10 k, 50 k and 100 k. The CAT5120 is designed to operate as a potentiometer. In this configuration, the low terminal of the resistor array is connected to ground (pin 2). The CAT5122 performs as a variable resistor. In this device, the wiper terminal and high terminal of the resistor array is connected at pin 5. The CAT5121 is a similar variable resistor, except the low terminal is connected to pin 5. Digital Interface Operation The MiniPots have two modes of operation when the serial interface is active: increment and decrement mode. The serial interface is only active when CS is low. The CS and U/D inputs control the position of the wiper along the resistor array. When CS transitions from high to low, the part will go into increment mode if U/D input is high, and into decrement mode when U/D input is low. Once the mode is set, the device will remain in that mode until CS goes high again. A low to-high transition at the U/D pin will increment or decrement the wiper position depending on the current mode (Figures 1 and 2). When the CS input transitions to high (serial interface inactive), the value of the counter is stored and the wiper position is maintained. Note that when the wiper reaches the maximum (or minimum) tap position, the wiper will not wrap around to the minimum (or maximum) position. Power-On Reset All parts in this family feature power-on reset (POR) circuitry that sets the wiper position to midscale at power-up. By default, the chip is in the increment mode. CS t CU t IL U/D t IC t CI t SETTLE W Note: "W" is not a digital signal. It represents wiper transitions. t IH t SETTLE Figure 1. Serial Interface Timing Diagram, Increment Mode CS t CU t IH U/D t IC t IL W t CI t SETTLE t SETTLE Note: "W" is not a digital signal. It represents wiper transitions. Figure 2. Serial Interface Timing Diagram, Decrement Mode Doc. No. MD-2121 Rev. G 4 (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5120, CAT5121, CAT5122 APPLICATIONS INFORMATION The MiniPots are intended for circuits requiring digitally controlled adjustable resistance, such as LCD contrast control, where voltage biasing adjusts the display contrast. Alternative Positive LCD Bias Control Use an op amp to provide buffering and gain on the output of the CAT5120. Connect the mechanical potentiometer to the positive input of a noninverting op amp (Figure 3) to select a portion of the input signal by digitally controlling the wiper terminal. Figure 4 shows a similar circuit for the CAT5121. Adjustable Gain Figure 5 shows how to use the variable resistor to digitally adjust the gain of a noninverting op amp configuration. Connect the CAT5121 in series with a resistor to ground to form the adjustable gain control of a noninverting amplifier. The Minipots have a low 5ppm/C ratiometric tempco that allows for a very stable adjustable gain configuration over temperature. +5V +5V H 30V W VOUT CAT5121 L 30V VOUT H CAT5120 L Figure 3. Positive LCD Bias Control Figure 4. Positive LCD Bias Control V CC VIN VOUT VIN VCC VOUT H W L H CAT5121 L CAT5120 Figure 5a. Adjustable Gain Circuit Figure 5b. Adjustable Gain Circuit (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 5 Doc. No. MD-2121 Rev. G CAT5120, CAT5121, CAT5122 PACKAGE OUTLINE DRAWINGS SC-70 6-Lead (SD) (1)(2) D e e SYMBOL MIN NOM MAX A A1 A2 b c E1 E 0.80 0.00 0.80 0.15 0.10 1.80 1.80 1.15 0.26 2.00 2.10 1.25 0.65 BSC 0.36 0.42 REF 0.15 BSC 0 4 1.10 0.10 1.00 0.30 0.18 2.20 2.40 1.35 0.46 D E E1 e L L1 L2 1 TOP VIEW 8 10 1 A2 A L L1 1 b A1 c END VIEW L2 SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MS-203. Doc. No. MD-2121 Rev. G 6 (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5120, CAT5121, CAT5122 SOT-23 6-Lead (TB) (1)(2) D e SYMBOL MIN NOM MAX A A1 A2 b c E1 E 0.90 0.00 0.90 0.30 0.08 2.90 BSC 2.80 BSC 1.60 BSC 0.95 BSC 0.30 0.45 0.60 REF 0.25 REF 0 5 5 4 10 10 1.15 1.45 0.15 1.30 0.50 0.22 D E E1 e L 0.60 PIN #1 IDENTIFICATION TOP VIEW L1 L2 1 2 8 15 15 1 A2 A 2 SIDE VIEW b A1 L1 L2 L c END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-178. (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 7 Doc. No. MD-2121 Rev. G CAT5120, CAT5121, CAT5122 SC-70 5-Lead (SD) (1)(2) D e e SYMBOL MIN NOM MAX A A1 A2 b c E1 E 0.80 0.00 0.80 0.15 0.10 1.80 1.80 1.15 0.26 2.00 2.10 1.25 0.65 BSC 0.36 0.42 REF 0.15 BSC 0 4 1.10 0.10 1.00 0.30 0.18 2.20 2.40 1.35 0.46 D E E1 e L L1 L2 1 TOP VIEW 8 10 1 A2 A L L1 1 b A1 c END VIEW L2 SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MS-203. Doc. No. MD-2121 Rev. G 8 (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5120, CAT5121, CAT5122 SOT-23 5-Lead (TB) (1)(2) D SYMBOL MIN NOM MAX A A1 A2 b E1 E 0.90 0.00 0.90 0.30 0.08 2.90 BSC 2.80 BSC 1.60 BSC 0.95 BSC 0.30 0.45 0.60 REF 0.25 REF 0 5 5 4 10 10 1.15 1.45 0.15 1.30 0.50 0.22 c D E E1 e e PIN #1 IDENTIFICATION TOP VIEW L L1 L2 1 2 0.60 8 15 15 1 A2 A 2 SIDE VIEW b A1 L1 L2 L c END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-178. (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 9 Doc. No. MD-2121 Rev. G CAT5120, CAT5121, CAT5122 EXAMPLE OF ORDERING INFORMATION Prefix CAT Device # 5120 Suffix SD (1) I -10 G T3 Optional Company ID Product Number 5120 5121 5122 Temperature Range I = Industrial (-40C to 85C) Resistance -10: 10 k -50: 50 k -00: 100 k Tape & Reel T: Tape & Reel 3: 3,000/Reel Lead Finish Blank: Matte-Tin G: NiPdAu Package SD: SC-70 TB: SOT-23 Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard finish is NiPdAu. (3) The device used in the example above is a CAT5120SDI-10GT3 (SC-70, Industrial Temperature, 10 k, NiPdAu, Tape & Reel, 3,000/Reel). (4) For additional package and temperature options, please contact your nearest ON Semiconductor Sales office. Doc. No. MD-2121 Rev. G 10 (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5120, CAT5121, CAT5122 ORDERING INFORMATION Orderable Part Number CAT5120SDI-10GT3 CAT5120TBI-10-T3 (1) Resistor [k] 10 10 10 50 50 50 100 100 100 10 10 10 50 50 50 100 100 100 10 10 10 50 50 50 100 100 100 Pin Package SC70-6 SOT23-6 SOT23-6 SC70-6 SOT23-6 SOT23-6 SC70-6 SOT23-6 SOT23-6 SC70-6 SOT23-6 SOT23-6 SC70-6 SOT23-6 SOT23-6 SC70-6 SOT23-6 SOT23-6 SC70-5 SOT23-5 SOT23-5 SC70-5 SOT23-5 SOT23-5 SC70-5 SOT23-5 SOT23-5 Quantity per Reel 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 3,000 CAT5120TBI-10GT3 CAT5120SDI-50GT3 CAT5120TBI-50-T3 (1) CAT5120TBI-50GT3 CAT5120SDI-00GT3 CAT5120TBI-00-T3 (1) CAT5120TBI-00GT3 CAT5121SDI-10GT3 CAT5121TBI-10-T3 (1) CAT5121TBI-10GT3 CAT5121SDI-50GT3 CAT5121TBI-50-T3 (1) CAT5121TBI-50GT3 CAT5121SDI-00GT3 CAT5121TBI-00-T3 (1) CAT5121TBI-00GT3 CAT5122SDI-10GT3 CAT5122TBI-10-T3 (1) CAT5122TBI-10GT3 CAT5122SDI-50GT3 CAT5122TBI-50-T3 (1) CAT5122TBI-50GT3 CAT5122SDI-00GT3 CAT5122TBI-00-T3 (1) CAT5122TBI-00GT3 (1) Part number is not exactly the same as the "Example of Ordering Information" shown on page 10. For part numbers marked with (1) there are two hyphens in the orderable part number. (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 11 Doc. No. MD-2121 Rev. G CAT5120, CAT5121, CAT5122 REVISION HISTORY Date 10-Mar-05 27-Sep-06 Rev. A B Description Initial Issue Update Electrical Characteristics Update Ordering Information Update Package Outlines Add Example of Ordering Information Add SOT-23 5 Lead package drawing Update SOT-23 6 Lead package drawing Update Package Outline Drawings Update Ordering Information Add MD- to document number Add Top Mark Code link Delete 10,000 per reel option Update Document Layout Change logo and fine print to ON Semiconductor Update Ordering Information table 12-Mar-07 C 12-Mar-08 D 29-May-08 21-Nov-08 013-Jul-09 E F G CAT5120, CAT5121, CAT5122 ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC 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 SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center: Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative Doc. No. MD-2121 Rev. G 12 (c) 2009 SCILLC. All rights reserved. Characteristics subject to change without notice |
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