CAT5112ZI-00

H CAT5112 EE GEN FR ALO 32-Tap Digitally Programmable Potentiometer (DPP™) with Buffered Wiper LE FEATURES APPLICATIONS ■ 32-position linear taper potentiometer ■ Automated product calibration ■ Non-volatile NVRAM wiper storage; ■ Remote control adjustments buffered wiper A D F R E ETM ■ Offset, gain and zero control ■ Low power CMOS technology ■ Tamper-proof calibrations ■ Single supply operation: 2.5V-6.0V ■ Contrast, brightness and volume controls ■ Increment up/down serial interface ■ Motor controls and feedback systems Ω, 50kΩ Ω and 100kΩ Ω ■ Resistance values: 10kΩ, ■ Programmable analog functions ■ Available in PDIP, SOIC, TSSOP and MSOP packages DESCRIPTION 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. 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 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, RWB. 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 when power is returned. The wiper can be adjusted to test new The digitally programmable potentiometer can be used as a buffered voltage divider. For applications where the potentiometer is used as a 2-terminal variable resistor, please refer to the CAT5114. The buffered wiper of the CAT5112 is not compatible with that application. DPPs bring variability and programmability to a broad range of applications and are used primarily to control, regulate or adjust a characteristic or parameter of an analog circuit. FUNCTIONAL DIAGRAM VCC RH RH U/D INC > Control and Memory + – + – RWB R WB CS Power On Recall RL RL Electronic Potentiometer Implementation VSS © 2004 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice Doc. No. 2002, Rev. L 1 CAT5112 PIN CONFIGURATION PIN FUNCTIONS PDIP Package (P, L) INC U/D RH GND 1 2 3 4 CS VCC 8 7 VCC CS 6 5 RL INC RWB U/D SOIC Package (S, V) INC U/D RH GND 1 2 3 4 8 7 VCC CS 6 5 RL RWB Pin Name TSSOP Package (U, Y) 1 2 3 4 8 7 6 5 RL RWB GND RH MSOP Package (R, Z) INC U/D RH GND 1 2 8 7 3 4 6 5 VCC CS RL RWB Function INC Increment Control U/D Up/Down Control RH Potentiometer High Terminal GND Ground RWB Buffered Wiper Terminal RL Potentiometer Low Terminal CS Chip Select VCC Supply Voltage PIN DESCRIPTIONS INC 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. The INC input (on the falling edge) moves the wiper in the up or down direction determined by the condition of the U/D input. DEVICE OPERATION D: Up/Down Control Input U/D The CAT5112 operates like a digitally controlled potentiometer with RH and RL equivalent to the high and low terminals and RWB equivalent to the mechanical potentiometer's wiper. There are 32 available tap positions including the resistor end points, RH and RL. There are 31 resistor elements connected in series between the R H and R L 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. The U/D input controls the direction of the wiper movement. When in a high state and CS is low, any highto-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. 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 fivebit 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 CAT5112 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. RWB: Wiper Potentiometer Terminal (Buffered) RWB is the buffered wiper terminal of the potentiometer. Its position on the resistor array is controlled by the control inputs, INC, U/D and CS. 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. R L and R H 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 CS: Chip Select The chip select input is used to activate the control input Doc. No. 2002, Rev. L 2 CAT5112 OPERATING MODES RH 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 -0.5V to +7V -0.5V to VCC +0.5V -0.5V to VCC +0.5V -0.5V to VCC +0.5V -0.5V to VCC +0.5V -0.5V to VCC +0.5V -0.5V to VCC +0.5V RWB CW CL Symbol Parameter Test Method VZAP(1) ILTH(1)(2) ESD Susceptibility Latch-Up Data Retention Endurance MIL-STD-883, Test Method 3015 JEDEC Standard 17 MIL-STD-883, Test Method 1008 MIL-STD-883, Test Method 1003 Min Operating Voltage Range Supply Current (Increment) ICC2 Supply Current (Write) ISB1 (2) Supply Current (Standby) Potentiometer Equivalent Circuit VCC = 6V, f = 1MHz, IW=0 VCC = 6V, f = 250kHz, IW=0 Programming, VCC = 6V VCC = 3V CS=VCC-0.3V U/D, INC=VCC-0.3V or GND Typ Max 2000 100 100 1,000,000 DC Electrical Characteristics: VCC = +2.5V to +6.0V unless otherwise specified Power Supply Symbol Parameter Conditions Min VCC ICC1 RL * 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 may be impaired by exposure to absolute rating conditions for extended periods of time. RELIABILITY CHARACTERISTICS TDR NEND Rwi Operating Ambient Temperature Commercial (‘C’ or Blank 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 ABSOLUTE MAXIMUM RATINGS Supply Voltage VCC to GND Inputs CS to GND INC to GND U/D to GND RH to GND RL to GND RWB to GND CH Units Volts mA Years Stores Typ Max Units 2.5 — — — — — — — — — 6.0 200 100 1 500 mA µA — 75 150 µA Min Typ Max Units V µA Logic Inputs Symbol Parameter Conditions IIH IIL VIH1 VIL1 Input Leakage Current Input Leakage Current TTL High Level Input Voltage TTL Low Level Input Voltage VIN = VCC VIN = 0V 4.5V ≤ VCC ≤ 5.5V — — 2 0 — — — — 10 –10 VCC 0.8 µA µA V V VIH2 CMOS High Level Input Voltage 2.5V ≤ VCC ≤ 6V VCC x 0.7 — VCC + 0.3 V VIL2 CMOS Low Level Input Voltage -0.3 — VCC x 0.2 V NOTES: (1) (2) (3) (4) This parameter is tested initially and after a design or process change that affects the parameter. Latch-up protection is provided for stresses up to 100mA on address and data pins from –1V to VCC + 1V IW=source or sink These parameters are periodically sampled and are not 100% tested. 3 Doc. No. 2002, Rev. L CAT5112 Potentiometer Parameters Symbol RPOT Parameter Conditions Min Typ Potentiometer Resistance -10 Device 10 -50 Device 50 -00 Device 100 Pot Resistance Tolerance Max Units kΩ ±20 % VRH Voltage on RH pin 0 VCC V VRL Voltage on RL pin 0 VCC V Resolution 1 % INL Integral Linearity Error IW ≤ 2µA 0.5 1 LSB DNL Differential Linearity Error IW ≤ 2µA 0.25 0.5 LSB ROUT Buffer Output Resistance .05VCC ≤ VWB≤ .95VCC, VCC=5V 1 Ω IOUT Buffer Output Current .05VCC ≤ VWB≤ .95VCC, VCC=5V 3 mA TCRPOT TC of Pot Resistance 300 TCRATIO Ratiometric TC TBD ppm/˚C Isolation Resistance TBD Ω 8/8/25 pF 1.7 MHz RISO CRH/CRL/CRW Potentiometer Capacitances fc VWB(SWING) Doc. No. 2002, Rev. L Frequency Response Passive Attenuator, 10kΩ Output Voltage Range IOUT≤100µA, VCC=5V 4 0.01VCC ppm/˚C .99VCC CAT5112 AC CONDITIONS OF TEST VCC Range 2.5V ≤ VCC ≤ 6V 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 +6.0V, VH = VCC, VL = 0V, unless otherwise specified Symbol Parameter Min Typ(1) Max Units tCI tDI tID tIL tIH tIC tCPH tCPH tIW tCYC tR, tF(2) tPU(2) tWR CS to INC Setup U/D to INC Setup U/D to INC Hold INC LOW Period INC HIGH Period INC Inactive to CS Inactive CS Deselect Time (NO STORE) CS Deselect Time (STORE) INC to VOUT Change INC Cycle Time INC Input Rise and Fall Time Power-up to Wiper Stable Store Cycle 100 50 100 250 250 1 100 10 — 1 — — — — — — — — — — — 1 — — — 5 — — — — — — — — 5 — 500 1 10 ns ns ns ns ns µs ns ms µs µs µs msec ms A. C. TIMING CS (store) tCYC tCI tIL tIC tIH tCPH 90% INC 90% 10% tDI tID tF U/D tR MI (3) tIW RW (1) Typical values are for TA=25˚C and nominal supply voltage. (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. 5 Doc. No. 2002, Rev. L CAT5112 ORDERING INFORMATION Prefix CAT Optional Company ID Device # 5112 Suffix S -10 Resistance -10: 10kohms -50: 50kohms -00: 100kohms Product Number 5112: Buffered 5114: Unbuffered Package P: PDIP S: SOIC U: TSSOP R: MSOP L: PDIP (Lead free, Halogen free) V: SOIC (Lead free, Halogen free) Y: TSSOP (Lead free, Halogen free) Z: MSOP (Lead free, Halogen free) Doc. No. 2002, Rev. L I TE13 Tape & Reel SOIC: 2000/Reel TSSOP: 2000/Reel MSOP: 2500/Reel Temperature Range Blank = Commercial (0°C to +70°C) I = Industrial (-40°C to +85°C) 6 CAT5112 REVISION HISTORY Date Rev. Reason 3/10/2004 J Updated Potentiometer Parameters 3/29/2004 K Changed Green Package marking for SOIC from W to V 4/12/2004 L Updated Reel Ordering Information Notes: (1) The device used in the above example is a CAT5112 SI-10TE13 (SOIC, 10K Ohms, Industrial Temperature, Tape & Reel) Copyrights, Trademarks and Patents Trademarks and registered trademarks of Catalyst Semiconductor include each of the following: DPP ™ AE2 ™ Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. For a complete list of patents issued to Catalyst Semiconductor contact the Company’s corporate office at 408.542.1000. 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Products with data sheets labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale. Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical semiconductor applications and may not be complete. Catalyst Semiconductor, Inc. Corporate Headquarters 1250 Borregas Avenue Sunnyvale, CA 94089 Phone: 408.542.1000 Fax: 408.542.1200 www.catsemi.com Publication #: Revison: Issue date: Type: 7 2002 L 4/12/04 Final Doc. No. 2002, Rev. L