CAT5116 Log-Taper, 100-Tap Digitally Programmable Potentiometer (DPP™) FEATURES DESCRIPTION 100-position, log-taper potentiometer The CAT5116 is a log-taper single digitally programmable potentiometer (DPP™) designed as a electronic replacement for mechanical potentiometers. Non-volatile EEPROM wiper storage 10nA ultra-low standby current Single-supply operation: 2.5V – 5.5V 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. Increment Up/Down serial interface Resistance value: 32kΩ Available in 8-pin MSOP, TSSOP, SOIC and DIP packages 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. APPLICATIONS Automated product calibration Remote control adjustments Offset, gain and zero control The wiper setting, stored in nonvolatile memory, is not lost when the device is powered down and is automatically reinstated when power is returned. The wiper can be adjusted to test new system values without effecting the stored setting. Audio volume control Sensor adjustment Motor controls and feedback systems Programmable analog functions Wiper-control of the CAT5116 is accomplished with ¯¯ , U/D ¯ , and INC ¯¯¯ . The INC ¯¯¯ three input control pins, CS input increments the wiper in the direction which is ¯ input. The CS ¯¯ determined by the logic state of the U/D input is used to select the device and also store the wiper position prior to power down. For Ordering Information details, see page 11. The digitally programmable potentiometer can be used as a three-terminal resistive divider or as a two-terminal variable resistor. FUNCTIONAL DIAGRAM RH VCC VCC RH U/D INC Control and Memory U/D INC CS RH 165Ω LOG TAPER RTOT = 32kΩ INTERFACE & WIPER CONTROL Potentiometer R = 32kΩ RW RW RW CS Power On Recall GND EEPROM RL 11Ω GND 10.4Ω RL General © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice Block Diagram 1 RL Potentiometer Schematic Doc. No. MD-2118 Rev. M CAT5116 PIN CONFIGURATION PDIP 8-Lead (L) SOIC 8 Lead (V) MSOP 8 Lead (Z) PIN DESCRIPTIONS Name Function TSSOP 8 Lead (Y) ¯¯¯ INC 1 8 VCC ¯¯ CS 1 8 RL ¯ U/D 2 7 ¯¯ CS VCC 2 7 RW RH 3 6 RL ¯¯¯ INC 3 6 GND GND 4 5 RWB ¯ U/D 4 5 RH CAT CAT ¯¯¯ INC ¯ U/D Increment Control RH Potentiometer High Terminal GND Up/Down Control Ground RW Buffered Wiper Terminal RL Potentiometer Low Terminal ¯¯ CS Chip Select VCC Supply Voltage PIN DESCRIPTION ¯¯¯ : Increment Control Input INC ¯¯¯ input moves the wiper in the up or down The INC ¯ input. direction determined by the condition of the U/D ¯¯ : Chip Select CS The chip select input is used to activate the control input of the CAT5116 and is active low. When in a ¯¯¯ and U/D ¯ inputs will not high state, activity on the INC affect or change the position of the wiper. ¯ : Up/Down Control Input U/D ¯ input controls the direction of the wiper The U/D ¯¯ is low, any movement. When in a high state and CS ¯¯¯ will cause the wiper to high-to-low transition on INC move one increment toward the RH terminal. When in ¯¯ is low, any high-to-low transition a low state and CS ¯¯¯ will cause the wiper to move one increment on INC towards the RL terminal. DEVICE OPERATION The CAT5116 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 100 tap positions including the resistor end points, RH and RL. There are 99 resistor elements connected in series between the RH and RL terminals. The wiper terminal is connected to one of the 100 taps and controlled by ¯¯¯, U/D ¯ and CS ¯¯ . These inputs control a three inputs, INC seven-bit up/down counter whose output is decoded to select the wiper position. The selected wiper position can be stored in nonvolatile memory using ¯¯¯ and CS ¯¯ inputs. the INC 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. RW: Wiper Potentiometer Terminal RW is the wiper terminal of the potentiometer. Its position on the resistor array is controlled by the ¯¯¯, U/D ¯ and CS ¯¯ . Voltage applied to control inputs, INC the RW terminal cannot exceed the supply voltage, VCC or go below ground, GND. ¯¯ set LOW the CAT5116 is selected and will With CS ¯ and INC inputs. HIGH to LOW respond to the U/D transitions on INC wil increment or decrement the wiper ¯ input and seven-bit (depending on the state of the U/D 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 ¯¯ transitions stored in nonvolatile memory whenever CS ¯¯¯ input is also HIGH. When the HIGH while the INC CAT5116 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. 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. ¯¯¯ set low, the CAT5116 may be deselected With INC 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. Doc. No. MD-2118 Rev. M 2 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5116 RH OPERATING 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 RWI RW CW CL RL Potentiometer Equivalent Circuit ABSOLUTE MAXIMUM RATINGS(1) Parameters Supply Voltage VCC to GND Inputs ¯¯ to GND CS ¯¯¯ to GND INC ¯ to GND U/D RH to GND RL to GND RW to GND Ratings Units -0.5 to +7V V -0.5 to VCC +0.5 -0.5 to VCC +0.5 -0.5 to VCC +0.5 -0.5 to VCC +0.5 -0.5 to VCC +0.5 -0.5 to VCC +0.5 V V V V V V Parameters Operating Ambient Temperature Industrial (‘I’ suffix) Junction Temperature (10s) Storage Temperature Lead Soldering (10s max) Ratings Units -40 to +85 ºC +150 +150 +300 ºC ºC ºC Max Units RELIABILITY CHARACTERISTICS Symbol Parameter Test Method Min VZAP(2) ILTH(2) (3) Typ ESD Susceptibility MIL-STD-883, Test Method 3015 2000 V Latch-Up JEDEC Standard 17 100 mA TDR Data Retention MIL-STD-883, Test Method 1008 100 Years NEND Endurance MIL-STD-883, Test Method 1003 1,000,000 Stores DC ELECTRICAL CHARACTERISTICS VCC = +2.5V to +5.5V unless otherwise specified Power Supply Symbol VCC ICC1(4) Parameter Conditions Min Typ Max Units 2.5 – 5.5 V VCC = 5.5V, f = 1MHz, IW = 0 – – 100 µA VCC = 5.5V, f = 250kHz, IW = 0 – – 50 µA 1 mA 500 µA 1 µA Operating Voltage Range Supply Current (Increment) ICC2 Supply Current (Write) ISB1 Supply Current (Standby) Programming, VCC = 5.5V VCC = 3V ¯¯ CS = VCC - 0.3V ¯ , INC ¯¯¯ = VCC - 0.3V or GND U/D – 0.01 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) This parameter is tested initially and after a design or process change that affects the parameter. (3) Latch-up protection is provided for stresses up to 100mA on address and data pins from -1V to VCC + 1V (4) IW = source or sink © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 3 Doc. No. MD-2118 Rev. M CAT5116 Logic Inputs Symbol Parameter Conditions IIH Input Leakage Current VIN = VCC – – 10 µA IIL Input Leakage Current VIN = 0V – – -10 µA 2 – VCC V 0 – 0.8 V VCC x 0.7 – VCC + 0.3 V -0.3 – VCC x 0.2 V VIH1 TTL High Level Input Voltage VIL1 TTL Low Level Input Voltage VIH2 CMOS High Level Input Voltage VIL2 CMOS Low Level Input Voltage 4.5V ≤ VCC ≤ 5.5V 2.5V ≤ VCC ≤ 5.5V Min Typ Max Units Potentiometer Parameters Symbol Parameter RPOT Potentiometer Resistance RTOL Pot. Resistance Tolerance VRH Voltage on RH pin VRL Voltage on RL pin RV (1) RWI IW Wiper Resistance TCRATIO Ratiometric TC fc Typ Noise Units kΩ ±20 % 0 VCC V 0 VCC V 0.05 VCC = 5V, IW = 1mA 200 400 Ω VCC = 2.5V, IW = 1mA 400 1000 Ω 1 mA 300 ppm/ºC 20 100kHz / 1kHz Potentiometer Capacitances Frequency Response Max 32 Wiper Current TC of Pot Resistance CH/CL/CW Min Relative Variation TCRPOT VN Conditions Passive Attenuator, 10kΩ ppm/ºC 8/24 nV/√Hz 8/8/25 pF 1.7 MHz Note: (1) Relative variation is a measure of the error in step size between taps = log (VW(N)) - log(VW(N-1)) = 0.045 ± 0.003. Doc. No. MD-2118 Rev. M 4 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5116 AC CONDITIONS OF TEST VCC Range 2.5V ≤ VCC ≤ 5.5V Input Pulse Levels 0.2VCC to 0.7VCC Input Rise and Fall Times 10ns Input Reference Levels 0.5VCC AC OPERATING CHARACTERISTICS VCC = +2.5V to +5.5V, VH = VCC, VL = 0V, unless otherwise specified Symbol tCI tDI tID tIL tIH tIC tCPH1 tCPH2 tIW tCYC (2) tR, tF tPU (2) tWR Parameter Min Typ(1) Max Units ¯¯ to INC ¯¯¯ Setup CS ¯ to INC ¯¯¯ Setup U/D 100 – – ns 50 – – ns ¯ to INC ¯¯¯ Hold U/D ¯¯¯ LOW Period INC 100 – – ns 250 – – ns ¯¯¯ HIGH Period INC ¯¯¯ Inactive to CS ¯¯ Inactive INC 250 – – ns 1 – – µs ¯¯ Deselect Time (NO STORE) CS ¯¯ Deselect Time (STORE) CS 100 – – ns 10 – – ms ¯¯¯ to VOUT Change INC ¯¯¯ Cycle Time INC – 1 5 µs 1 – – µs ¯¯¯ Input Rise and Fall Time INC – – 500 µs Power-up to Wiper Stable – – 1 ms 5 10 ms Store Cycle A.C. TIMING CS tCI tIL tCYC tIC tIH (store) tCPH 90% INC 90% 10% tDI tID tF U /D tIW tR MI(3) RW Notes: (1) (2) (3) Typical values are for TA = 25ºC and nominal supply voltage. This parameter is periodically sampled and not 100% tested. 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. © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 5 Doc. No. MD-2118 Rev. M CAT5116 TYPICAL CHARACTERISTICS VCC = 5V, TAMB = 25ºC, unless otherwise specified Wiper-Low/High Resistances vs. Wiper Position Wiper-Low Resistance vs. Wiper Position (log scale) 100 100. 0 80 Total Resistanc e (% ) Total Resistanc e (%) 90 70 RH - RW 60 RW - RL 50 40 30 20 10. 0 1.0 10 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.1 WIPER POSITION WIPER POSITION Wiper Resistance vs. Wiper Voltage Standby Supply Current vs. Temperature 100 500 STANDBY CURRENT [nA] WIPE R RESISTANCE [ohm] 600 VCC = 3.0V Tap 84 400 300 VCC = 4.4V Tap 84 200 100 0 0 1 Doc. No. MD-2118 Rev. M 2 3 4 W IPER VOLTAGE[V] 5 80 60 VCC = 5V 40 20 VCC = 2.5V 0 -40 6 -15 10 35 60 85 TEMPER ATURE [°C] 6 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5116 PACKAGE OUTLINE DRAWINGS PDIP 8-Lead 300mils (L) (1)(2) SYMBOL MIN NOM A E1 5.33 A1 0.38 A2 2.92 b 0.36 0.46 0.56 b2 1.14 1.52 1.78 3.30 4.95 c 0.20 0.25 0.36 D 9.02 9.27 10.16 E 7.62 7.87 8.25 e PIN # 1 IDENTIFICATION MAX 2.54 BSC E1 6.10 eB 7.87 L 2.92 6.35 7.11 10.92 3.30 3.80 D TOP VIEW E A2 A A1 c b2 L e eB b SIDE VIEW END VIEW Notes: (1) All dimensions are in millimeters. (2) Complies with JEDEC standard MS-001. © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 7 Doc. No. MD-2118 Rev. M CAT5116 SOIC 8-Lead 150mils (V) (1)(2) E1 E SYMBOL MIN A 1.35 1.75 A1 0.10 0.25 b 0.33 0.51 MAX c 0.19 0.25 D 4.80 5.00 E 5.80 6.20 E1 3.80 e PIN # 1 IDENTIFICATION NOM 4.00 1.27 BSC h 0.25 0.50 L 0.40 1.27 θ 0º 8º TOP VIEW D h A1 θ A c e b L SIDE VIEW END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MS-012. Doc. No. MD-2118 Rev. M 8 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5116 TSSOP 8-Lead 4.4mm (Y) (1)(2) b SYMBOL MIN NOM A E1 E MAX 1.20 A1 0.05 A2 0.80 b 0.19 c 0.09 D 2.90 3.00 3.10 E 6.30 6.40 6.50 E1 4.30 4.40 4.50 e 0.15 0.90 1.05 0.30 0.20 0.65 BSC L 1.00 REF L1 0.50 θ1 0° 0.60 0.75 8° e TOP VIEW D A2 A c θ1 A1 L1 SIDE VIEW L END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-153. © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 9 Doc. No. MD-2118 Rev. M CAT5116 MSOP 8-Lead 3.0 x 3.0mm (Z) (1)(2) SYMBOL MIN NOM MAX A1 0.05 0.10 0.15 A2 0.75 0.85 0.95 b 0.22 A E E1 1.10 c 0.13 D 2.90 0.38 0.23 3.00 3.10 E 4.80 4.90 5.00 E1 2.90 3.00 3.10 e L 0.65 BSC 0.40 0.60 L1 L2 θ 0.80 0.95 REF 0.25 BSC 0º 6º TOP VIEW D A A2 A1 DETAIL A e b c SIDE VIEW END VIEW θ L2 L L1 DETAIL A Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-187. Doc. No. MD-2118 Rev. M 10 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT5116 EXAMPLE OF ORDERING INFORMATION Prefix CAT Device # 5116 1 Suffix I – G(4) Temperature Range I = Industrial (-40ºC to 85ºC) Lead Finish G: NiPdAu Blank: Matte-Tin V Optional Company ID Product Number 5116 Package L: PDIP V: SOIC Y: TSSOP Z: MSOP T3 Tape & Reel T: Tape & Reel 3: 3,000/Reel ORDERING PART NUMBER CAT5116LI-G CAT5116VI-G CAT5116YI-G CAT5116ZI Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is NiPdAu. (3) The device used in the above example is a CAT5116VI-GT3 (SOIC, Industrial Temperature, NiPdAu, Tape & Reel, 3,000/Reel). (4) For Matte-Tin finish, contact factory. © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 11 Doc. No. MD-2118 Rev. M CAT5116 REVISION HISTORY Date Rev. Description Revised Features Revised Potentiometer Schematic Revised DC Electrical Characteristics Updated Potentiometer Parameters 09-Oct-03 G 10-Mar-04 H Updated Potentiometer Parameters 29-Mar-04 I Changed Green Package marking for SOIC from W to V 12-Apr-04 J Eliminated data sheet designation Updated Reel Ordering Information 01-Jun-07 K Added Package Outline Updated Example of Ordering Information Added MD- in front of Document No. 21-Nov-08 L Update Package Outline Drawings Change logo and fine print to ON Semiconductor 13-Jan-09 M Update Ordering Part Number © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 12 Doc. No. MD-2118 Rev. M