View CAT5120CAT5121_202065.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Advance Information
CAT5120, CAT5121, CAT5122
16-Tap MiniPotTM Digitally Programmable Potentiometers with 2-Wire Interface FEATURES
s 0.3A Ultra-low supply current s Single-supply operation: 2.7 V to 5.5 V s Glitchless switching between resistor taps s Power-on reset to midscale
H
GEN FR ALO
EE
LE
A D F R E ETM
s 2-Wire up/down serial interface s Resistance values: 10k, 50k and 100k , s Available in SC70 and SOT-23 packages
APPLICATIONS
s LCD screen adjustment s Volume control s Mechanical potentiometer replacement s Gain adjustment s Line impedance matching
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 32-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: 10k , 50k and 100k. These are available in space-saving 5-pin and 6-pin SC70 and SOT-23 packages.
PIN CONFIGURE
FUNCTIONAL DIAGRAM
H
VDD 1
6H
VDD 1
5H
VDD GND
GND 2
5W
GND 2
CAT5120
U/D 3 4 CS U/D 3
CAT5122
4 CS
CS
UP/DN Counter 16-Position Decoder
W
U/D
VDD 1
6H
L
GND 2
5L
CAT5121
U/D 3 4 CS
Top View
(c) 2004 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice
1
Doc. No. 2121, Rev. B
CAT5120/5121/5122
PIN DESCRIPTION
Pin Number Pin Name CAT5120 1 2 3 CAT5121 1 2 3 CAT5122 1 2 3 VDD GND U/D 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 Pin Function
4 5 6
4 5 6
4 5
CS L W H
Doc. No. 2121, Rev. B
2
CAT5120/5121/5122
ORDERING INFORMATION
Ordering Part Number CAT5120SBI-10-T CAT5120SBI-10-T10 CAT5120TPI-10-T CAT5120TPI-10-T10 CAT5120SBI-50-T CAT5120SBI-50-T10 CAT5120TPI-50-T CAT5120TPI-50-T10 CAT5120SBI-00-T CAT5120SBI-00-T10 CAT5120TPI-00-T CAT5120TPI-00-T10 CAT5121SBI-10-T CAT5121SBI-10-T10 CAT5121TPI-10-T CAT5121TPI-10-T10 CAT5121SBI-50-T CAT5121SBI-50-T10 CAT5121TPI-50-T CAT5121TPI-50-T10 CAT5121SBI-00-T CAT5121SBI-00-T10 CAT5121TPI-00-T CAT5121TPI-00-T10 CAT5122SBI-10-T CAT5122SBI-10-T10 CAT5122TPI-10-T CAT5122TPI-10-T10 CAT5122SBI-50-T CAT5122SBI-50-T10 CAT5122TPI-50-T CAT5122TPI-50-T10 CAT5122SBI-00-T CAT5122SBI-00-T10 CAT5122TPI-00-T CAT5122TPI-00-T10 Resistor K 10 10 10 10 50 50 50 50 100 100 100 100 10 10 10 10 50 50 50 50 100 100 100 100 10 10 10 10 50 50 50 50 100 100 100 10 0 Top Mark JE_ JE_ JEYM JEYM JF_ JF_ JFYM JFYM JGYM JG_ JGYM JGYM JH_ JH_ JHYM JHYM JJ_ JJ_ JJYM JJYM JK_ JK_ JKYM JKYM JB_ JB_ JBYM JBYM JC_ JC_ JCYM JCYM JD_ JD_ JDYM JDYM Pin Package 6 Lead SC70 6 Lead SC70 6 Lead SOT-23 6 Lead SOT-23 6 Lead SC70 6 Lead SC70 6 Lead SOT-23 6 Lead SOT-23 6 Lead SC70 6 Lead SC70 6 Lead SOT-23 6 Lead SOT-23 6 Lead SC70 6 Lead SC70 6 Lead SOT-23 6 Lead SOT-23 6 Lead SC70 6 Lead SC70 6 Lead SOT-23 6 Lead SOT-23 6 Lead SC70 6 Lead SC70 6 Lead SOT-23 6 Lead SOT-23 5 Lead SC70 5 Lead SC70 5 Lead SOT-23 5 Lead SOT-23 5 Lead SC70 5 Lead SC70 5 Lead SOT-23 5 Lead SOT-23 5 Lead SC70 5 Lead SC70 5 Lead SOT-23 5 Lead SOT-23 Parts Per Reel 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k
3
Doc. No. 2121, Rev. B
CAT5120/5121/5122
ORDERING INFORMATION (CON'T)
Ordering Part Number CAT5120SDI-10-T CAT5120SDI-10-T10 CAT5120TBI-10-T CAT5120TBI-10-T10 CAT5120SDI-50-T CAT5120SDI-50-T10 CAT5120TBI-50-T CAT5120TBI-50-T10 CAT5120SDI-00-T CAT5120SDI-00-T10 CAT5120TBI-00-T CAT5120TBI-00-T10 CAT5121SDI-10-T CAT5121SDI-10-T10 CAT5121TBI-10-T CAT5121TBI-10-T10 CAT5121SDI-50-T CAT5121SDI-50-T10 CAT5121TBI-50-T CAT5121TBI-50-T10 CAT5121SDI-00-T CAT5121SDI-00-T10 CAT5121TBI-00-T CAT5121TBI-00-T10 CAT5122SDI-10-T CAT5122SDI-10-T10 CAT5122TBI-10-T CAT5122TBI-10-T10 CAT5122SDI-50-T CAT5122SDI-50-T10 CAT5122TBI-50-T CAT5122TBI-50-T10 CAT5122SDI-00-T CAT5122SDI-00-T10 CAT5122TBI-00-T CAT5122TBI-00-T10 Resistor K 10 10 10 10 50 50 50 50 100 100 100 100 10 10 10 10 50 50 50 50 100 100 100 100 10 10 10 10 50 50 50 50 100 100 100 100 Top Mark KC_ KC_ KCYM KCYM KD_ KD_ KDYM KDYM KE_ KE_ KEYM KEYM KF_ KF_ KFYM KFYM KG_ KG_ KGYM KGYM KH_ KH_ KHYM KHYM KY_ KY_ KYYM KYYM KA_ KA_ KAYM KAYM KB_ KB_ KBYM KBYM Pin Package 6 Lead SC70 green 6 Lead SC70 green 6 Lead SOT-23 green 6 Lead SOT-23 green 6 Lead SC70 green 6 Lead SC70 green 6 Lead SOT-23 green 6 Lead SOT-23 green 6 Lead SC70 green 6 Lead SC70 green 6 Lead SOT-23 green 6 Lead SOT-23 green 6 Lead SC70 green 6 Lead SC70 green 6 Lead SOT-23 green 6 Lead SOT-23 green 6 Lead SC70 green 6 Lead SC70 green 6 Lead SOT-23 green 6 Lead SOT-23 green 6 Lead SC70 green 6 Lead SC70 green 6 Lead SOT-23 green 6 Lead SOT-23 green 5 Lead SC70 green 5 Lead SC70 green 5 Lead SOT-23 green 5 Lead SOT-23 green 5 Lead SC70 green 5 Lead SC70 green 5 Lead SOT-23 green 5 Lead SOT-23 green 5 Lead SC70 green 5 Lead SC70 green 5 Lead SOT-23 green 5 Lead SOT-23 green Parts Per Reel 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k
Doc. No. 2121, Rev. B
4
CAT5120/5121/5122
ABSOLUTE MAXIMUM RATINGS
VDD to GND........................................... -0.3 V to +6 V All Other Pins to GND .............. -0.3 V to (VDD + 0.3) V Input and Output Latch-Up Immunity ............ +200 mA Maximum Continuous Current into H, L and W 100k ................................................................... +0.6 mA 50k ...................................................................... +1.3 mA 10k ...................................................................... +1.3 mA Continuous Power Dissipation (TA = +70C) 5-pin SC70* .................................................... 247 mW 6-pin SC70* .................................................... 245 mW Operating Temperature Range ........... -40C to +85C Junction Temperature ......................................+150C Storage Temperature Range ............ -65C to +150C Soldering Temperature (soldering, 10s) .......... +300C
*(derate 3.1mW/C above TA = +70C) COMMENT 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.
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).
Symbol DC Performance Resolution CAT5120 End-to-End Resistance CAT5121 CAT5122 TCR INL DNL End-to-End Resistance Tempco Ratiometric Resistance Tempco Integral Nonlinearity Differential Nonlinearity Zero/Full-Scale Error RW Wiper Resistance +0.1 200 16 80 40 8 100 50 10 200 5 +0.5 +0.5 +0.5 600 120 60 12 ppm/ C ppm/ C LSB LSB LSB k Taps Parameter Conditions Min Typ Max Units
Digital Inputs VIH VIL Input High Voltage Input Low Voltage 0.7 x VDD 0.3 x VDD V V
Timing Characteristics (Figures 1, 2) tCU tCI tIC tIL tIH fTOGGLE 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 Up/Down Toggle Rate
(1)
25 50 25 25 25 1 100k variable resistor configuration, CL = 10pF 100k potentiometer configuration, CL = 10pF 1 0.25
ns ns ns ns ns MHz
tSETTLE
Output Settling Time
(2)
s
5
Doc. No. 2121, Rev. B
CAT5120/5121/5122
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.
Symbol Power Supplies VDD IDD ISD Supply Voltage Active Supply Current (3) Standby Supply Current
(4)
Parameter
Conditions
Min
Typ
Max
Units
2.7
5.5 25
V A A
VDD = +5V
0.3
1
Notes: 1. Up/Down Toggle Rate: fTOGGLE = 2. 3. 4. 1 tSETTLE
Typical setting times are dependant on end-to-end resistance. Supply current taken while changing wiper tap, fTOGGLE = 1MHz. Supply current taken while wiper position is fixed.
TYPICAL OPERATING CHARACTERISTICS
TA = 25C, unless otherwise noted.
VDD = 2.7V
VDD = 5.5V
0
4
8
10
12
14
16
WIPER POSITION
VDD = 5.5V
VDD = 2.7V
Doc. No. 2121, Rev. B
6
CAT5120/5121/5122
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: 10k, 50k and 100k. 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.
Figure 1. Serial Interface Timing Diagram, Increment Mode
CS
t CU t IL
U/D t CI t SETTLE
t IC
t IH
t SETTLE
W
Note: "W" is not a digital signal. It represents wiper transitions.
Figure 2. Serial Interface Timing Diagram, Decrement Mode
CS
t CU t IH U/D
t IC
t IL t CI W t SETTLE
t SETTLE
Note: "W" is not a digital signal. It represents wiper transitions.
7
Doc. No. 2121, Rev. B
CAT5120/5121/5122
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.
Figure 3. Positive LCD Bias Control
+5V
Figure 4. Positive LCD Bias Control
+5V H
H 30V W
CAT5120
30V
V OUT
CAT5121 L
V OUT
L
Figure 5a. Adjustable Gain Circuit
VCC V IN V OUT
Figure 5b. Adjustable Gain Circuit
V CC V IN V OUT
H W L H
L
CAT5121
CAT5120
Doc. No. 2121, Rev. B
8
CAT5120/5121/5122
PACKAGE OUTLINES SC70
0.15(.006) C D A E/2 E A
E1/2 E1 0.15(.006) C PIN #1 N1 e N2 B
SEE DETAIL A
A2
A
SEATING PLANE
U1
.10(.004) C
A1
C
(b) b1
BASE METAL
H 015(.0059) GAGE PLANE c1 c U
SECTION A-A
DETAIL A
PIN LEAD COUNT CODE 5 6 N1 2 2 N2 3 3 N3 4 4 N4 5 N5 5 6
S Y M B O L
COMMON
DIMENSIONS MILLIMETER MIN NOM MAX 0.80 1.10 0 0.80 0.15 0.15 0.08 0.08 1.90 2.00 1.15 0.90 0.20 0.13 2.10 2.10 1.25 0.65 BSC 1.30 BSC 0.26 0 4 0.36 0.46 8 10 0.010 040.10 1.00 0.30 0.25 0.25 0.20 2.15 2.20 1.35 DIMENSIONS INCH MIN 0.031 0 0.031 0.006 0.006 0.003 0.003 0.074 0.078 0.045 NOM 0.035 0.008 0.005 0.082 0.082 0.050 0.0255 BSC 0.0512 BSC 0.014 0.018 810MAX 0.043 0.004 0.040 0.012 0.010 0.010 0.008 0.084 0.086 0.055
A A1 A2
NOTE: 1. 2.
b
3.
CONTROLLING DIMENSION: MILLIMETER. CONVERTED INCH DIMENSION ARE NOT NECESSARILY EXACT. DIMENSION "D" DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. MOLD FLASH, PROTRUSION OR GATE BURR SHALL NOT EXCEED 0.15MM (0.006") PER END. DIMENSION "E1" DOES NOT INCLUDE INTER-LEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.15MM (0.006") PER SIDE. THE PACKAGE TOP IS SMALLER THAN THE PACKAGE BOTTOM. DIMENSION D AND E1 ARE DETERMINED AT THE OUTERMOST EXPTREMES OF THE PLASTIC BODY EXCLUSIVE OF MOLD FLASH, TIE BAR BURRS, GATE BURRS ADN INTERLEAD FLASH, BUT INCLUDING ANY MISMATCH BETWEEN THE TOP AND BOTTOM OF THE PLASTIC BODY.
b1 c c1 D E E1 e e1 L U U1
9
Doc. No. 2121, Rev. B
CAT5120/5121/5122
SOT-23 (AA OPTION)
A N
3 D
4 e1 5 N/2 +1
aaa C 2X
H
D
B B
VIEW A-A SEE VIEW C
E/2 E1/2 3 4 E1 E
R1 R GAUGE PLANE L2
aaa C D 2X 1 e 5 B NX b ddd 2 N/2
SEATING C PLANE
L (L1) VIEW C
bbb C 2X N/2 TIPS
(b) b1
WITH METAL
M
CA BD
c
c1
BASE METAL
SECTION B - B
b5
8 5 e/2
A
7
X X=A &/or B
A
X X=A &/or B EVEN LEAD SIDES TOP VIEW
A2 NX A1
ccc C
ODD LEAD SIDES TOP VIEW
A
SEATING C PLANE
All Dimensions are in Millimeters
Min A A1 A2 c c1 D E E1 L L1 L2 R R1 0.10 0.10 0 0.30 -- 0.01 0.84 0.12 0.08 Nom -- 0.05 0.87 0.15 0.13 2.90BSC 2.80BSC 1.60BSC 0.40 0.60REF 0.25BSC -- -- 4 -- 0.25 8 ddd 0.20 0.50 Max 1.00 0.10 0.90 0.20 0.16 7 7 3,4 3,4 3,4 b b1 e e1 N Min 0.30 0.31 AA Nom -- 0.35 0.95BSC 1.90BSC 6 Max 0.45 0.39 Min 0.30 0.31 Notes aaa bbb ccc Tolerances of Form and Position 0.15 0.25 0.10 Variations 6 AB Nom -- 0.35 0.95BSC 1.90BSC 5 Tolerances of Form and Position 0.20 0.13 1,2 Max 0.45 0.39 Min 0.22 0.22 BA Nom -- 0.26 0.65BSC 1.95BSC 8 Max 0.36 0.30 Notes 7,8 Notes 1,2 1,2 1,2
4. 5. 6. 7. 8.
Notes: 1. Dimensions and tolerancing per ASME Y14.5M - 1994 2. Dimension are in mm. 1 4 10 12 3. Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall not exceed 0.15mm per end. Dimension E1 does not include interlead flash or protrusion. Interlead flash or protrusion shall not exceed 0.15mm per side. D and E1 dimensions are determined at Datum H. The package top may be smaller than the package bottom. Dimensions D and E1 are determined at the outermost extremes of the plastic body exclusive of mold flash, the bar burrs, gate burrs and interlead flash, but including any mismatch between the top and bottom of the plastic body. D and E1 dimensions are determined at Datum H. Datums A & B to be determined at Datum H. Package varation "AB" is a 5 lead version of the 6 lead variation "AA" where lead #5 has been removed from the 6 lead "AA" variation. These dimensions apply to the flat section of the lead between 0.08mm and 0.15mm from the lead tip. Dimension "b" does not include dambar protrusion. Allowable dambar protrusion shall be 0.08mm total in excess of the "b" dimension at maximum material condition. The dambar cannot be located on the lower radius of the foot. Minimum space between protrusion and an adjacent lead shall not be less than 0.07mm.
Doc. No. 2121, Rev. B
10
CAT5120/5121/5122
REVISION HISTORY
Date 3/18/2004 7/19/2004 Rev. A B Reason Initial Issue Added SOT-23 package in all areas Updated Description Updated Ordering Information Updated Electrical Characteristics Updated Typical Operating Characteristics Updated Functional Description
Copyrights, Trademarks and Patents Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:
DPP TM AE2 TM MiniPotTM
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.
CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
Catalyst Semiconductor 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 Catalyst Semiconductor product could create a situation where personal injury or death may occur. Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. 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:
2121 B 7/19/04 Advance
11
Doc. No. 2121, Rev. B

▲Up To Search▲

Price & Availability of CAT5120CAT5121

	To Download CAT5120CAT5121 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .