CAT5120SDI-50GT3 [ONSEMI]
16-Tap MiniPot⢠Digitally Programmable Potentiometers with 2-Wire Interface; 16抽头MiniPotâ ?? ¢数字可编程，带有2线接口电位器
| 型号： | CAT5120SDI-50GT3 |
| 厂家： | 
ONSEMI |
| 描述： | 16-Tap MiniPot⢠Digitally Programmable Potentiometers with 2-Wire Interface |
| 文件： | 总12页 (文件大小：246K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CAT5120, CAT5121, CAT5122
16-Tap MiniPot™ Digitally Programmable
Potentiometers with 2-Wire Interface
FEATURES
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.
0.3µA 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 kΩ, 50 kΩ and 100 kΩ
Available in SC-70 and SOT-23 packages
The CAT5120 is configured as a potentiometer. The
CAT5121 and CAT5122 are configured as variable
resistors. See Pin Configurations for part functionality.
APPLICATIONS
Three resistance values are available: 10 kΩ, 50 kΩ
and 100 kΩ. These are available in space-saving 5-pin
and 6-pin SC-70 and SOT-23 packages.
LCD screen adjustment
Volume control
Mechanical potentiometer replacement
Gain adjustment
FUNCTIONAL DIAGRAM
H
Line impedance matching
V
DD
GND
CS
For Ordering Information details, see page 10.
W
U/D
PIN CONFIGURATION
L
SC-70
SOT-23
SC-70
SOT-23
PIN DESCRIPTIONS
V
1
2
3
6
5
4
H
V
1
2
3
5
4
H
DD
DD
Name Description
VDD
Power Supply
Ground
GND
U/D
W
CS
GND
U/D
GND
CAT5120
CAT5122
¯¯¯¯¯
¯¯
Up/Down Control Input. With CS low, a
low-to-high transition increments or
decrements the wiper position.
CS
¯
U/D
SC-70
SOT-23
¯¯
Chip Select Input. A high-to-low CS
transition determines the mode:
increment if U/D is high, or decrement if
¯¯
CS
¯
V
DD
1
2
3
6
5
4
H
¯
U/D is low.
L
W
H
Low Terminal of Resistor
Wiper Terminal of Resistor
High Terminal of Resistor
GND
U/D
L
CAT5121
CS
© 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
Ratings
-0.3 to +6
Units
V
VDD to GND
All Other Pins to GND
Input and Output Latch-Up Immunity
-0.3 to (VDD + 0.3)
±200
V
mA
Maximum Continuous Current into H, L and W
100kΩ
50kΩ
10kΩ
±0.6
±1.3
±1.3
mA
Continuous Power Dissipation (TA = +70ºC)
5-pin SC-70(2)
247
245
mW
6-pin SC-70(2)
Operating Temperature Range
Junction Temperature
-40 to +85
+150
ºC
ºC
ºC
ºC
Storage Temperature Range
Soldering Temperature (soldering, 10s)
-65 to +150
+300
ELECTRICAL CHARACTERISTICS
VDD = 2.7 V to 5.5 V, VH = VDD, VL = 0, TA = -40ºC to +85ºC. Typical values are at VDD = 2.7 V, TA = 25ºC, unless
otherwise noted.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Taps
kΩ
DC Performance
16
75
Resolution
100
125
62.5
12.5
End-to-End Resistance (-00)
End-to-End Resistance (-50)
End-to-End Resistance (-10)
37.5
7.5
50
10
200
5
ppm/ºC
ppm/ºC
LSB
End-to-End Resistance Tempco TCR
Ratiometric Resistance Tempco
±0.5
±0.5
±0.5
600
Integral Nonlinearity
Differential Nonlinearity
Zero/Full-Scale Error
Wiper Resistance
Digital Inputs
INL
LSB
DNL
±0.1
200
LSB
Ω
RW
Input High Voltage
Input Low Voltage
VIH
VIL
0.7 x VDD
V
V
0.3 x VDD
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/ºC above TA = +70ºC
Doc. No. MD-2121 Rev. G
2
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
CAT5120, CAT5121, CAT5122
ELECTRICAL CHARACTERISTICS (continued)
Parameter
Timing Characteristics (Figures 1, 2)
¯¯
Symbol
Conditions
Min
Typ
Max
Units
¯
tCU
tCI
25
50
25
25
25
ns
ns
U/D Mode to CS Setup
¯¯
¯
CS to U/D Step Setup
¯¯
¯
tIC
ns
CS to U/D Step Hold
¯
tIL
ns
U/D Step Low Period
¯
tIH
ns
U/D Step High Period
(1)
¯¯¯¯¯
Up/Down Toggle Rate
fTOGGLE
1
1
MHz
100 kΩ variable resistor
configuration, CL = 10 pF
Output Settling Time (2)
tSETTLE
μs
100 kΩ potentiometer
configuration, CL = 10 pF
0.25
Power Supply
Supply Voltage
VDD
IDD
ISB
2.7
5.5
25
1
V
Active Supply Current (3)
Standby Supply Current (4)
µA
µA
VDD = +5 V
0.3
TYPICAL OPERATING CHARACTERISTICS
TA = 25ºC, unless otherwise noted.
V = 2.7V
DD
50K
V = 5.5V
DD
0
4
8
12 16 20 24 28 32
WIPER POSITION
TEMPERATURE (ºC)
V = 5.5V
DD
V = 2.7V
DD
TEMPERATURE (ºC)
Notes:
(1) Up/Down Toggle Rate:
1
fTOGGLE
=
tSETTLE
(2) Typical settling times are dependent on end-to-end resistance.
(3) Supply current measured while changing wiper tap, fTOGGLE = 1 MHz.
(4) Supply current measured while wiper position is fixed.
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
3
Doc. No. MD-2121 Rev. G
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 kΩ,
50 kΩ and 100 kΩ.
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-
¯
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).
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
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.
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.
Digital Interface Operation
Power-On Reset
The MiniPots have two modes of operation when the
serial interface is active: increment and decrement
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.
¯¯
mode. The serial interface is only active when CS is low.
CS
t
CU
t
IC
t
IL
U/D
t
t
IH
CI
t
SETTLE
t
SETTLE
W
Note: "W" is not a digital signal. It represents wiper transitions.
Figure 1. Serial Interface Timing Diagram, Increment Mode
CS
t
t
IC
CU
t
IH
U/D
t
IL
t
CI
W
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
© 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.
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.
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.
+5V
+5V
H
H
30V
30V
W
V
OUT
V
OUT
L
CAT5121
L
CAT5120
Figure 3. Positive LCD Bias Control
Figure 4. Positive LCD Bias Control
V
V
CC
CC
V
IN
V
IN
V
OUT
V
OUT
H
W
L
H
CAT5120
CAT5121
L
Figure 5a. Adjustable Gain Circuit
Figure 5b. Adjustable Gain Circuit
© 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)
SYMBOL
MIN
NOM
MAX
1.10
0.10
1.00
0.30
0.18
2.20
2.40
1.35
D
A
A1
A2
b
0.80
0.00
0.80
0.15
0.10
1.80
1.80
1.15
e
e
c
D
2.00
2.10
E1
E
E
E1
e
1.25
0.65 BSC
0.36
L
0.26
0.46
L1
L2
θ
0.42 REF
0.15 BSC
TOP VIEW
0°
4°
8°
θ1
10°
θ1
A2
A1
A
θ
L
L1
b
θ1
c
L2
SIDE VIEW
END 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
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
CAT5120, CAT5121, CAT5122
(1)(2)
SOT-23 6-Lead (TB)
D
SYMBOL
MIN
NOM
MAX
1.45
0.15
1.30
0.50
0.22
e
A
A1
A2
b
0.90
0.00
0.90
0.30
0.08
1.15
c
E
E1
D
2.90 BSC
2.80 BSC
1.60 BSC
0.95 BSC
0.45
E
E1
e
L
0.30
0.60
L1
L2
θ
0.60 REF
0.25 REF
4º
PIN #1 IDENTIFICATION
TOP VIEW
0º
5º
5º
8º
θ1
θ2
10º
15º
15º
10º
θ1
A2
A
θ
b
L1
L
θ2
c
A1
L2
SIDE VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC standard MO-178.
© 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)
SYMBOL
MIN
NOM
MAX
1.10
0.10
1.00
0.30
0.18
2.20
2.40
1.35
D
A
A1
A2
b
0.80
0.00
0.80
0.15
0.10
1.80
1.80
1.15
e
e
c
D
2.00
2.10
E1
E
E
E1
e
1.25
0.65 BSC
0.36
L
0.26
0.46
L1
L2
θ
0.42 REF
0.15 BSC
TOP VIEW
0°
4°
8°
θ1
10°
θ1
A2
A1
A
θ
L
L1
b
θ1
c
L2
SIDE VIEW
END 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
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
CAT5120, CAT5121, CAT5122
(1)(2)
SOT-23 5-Lead (TB)
D
SYMBOL
MIN
NOM
MAX
1.45
0.15
1.30
0.50
0.22
A
A1
A2
b
0.90
0.00
0.90
0.30
0.08
1.15
c
E
E1
D
2.90 BSC
2.80 BSC
1.60 BSC
0.95 BSC
0.45
E
E1
e
e
L
0.30
0.60
L1
L2
θ
0.60 REF
0.25 REF
4º
PIN #1 IDENTIFICATION
0º
5º
5º
8º
TOP VIEW
θ1
θ2
10º
15º
15º
10º
θ1
A2
A
θ
b
L1
L
θ2
c
A1
L2
SIDE VIEW
END VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC standard MO-178.
© 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 (1)
Prefix
Device #
Suffix
CAT
5120
SD
I
-10
G
T3
Optional
Company ID
Temperature Range
I = Industrial (-40ºC to 85ºC)
Tape & Reel
T: Tape & Reel
3: 3,000/Reel
Product Number
Resistance
-10: 10 kΩ
-50: 50 kΩ
-00: 100 kΩ
Lead Finish
Blank: Matte-Tin
G: NiPdAu
5120
5121
5122
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 kΩ, 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
© 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)
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
Resistor [kΩ] Pin Package
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
10
10
SC70-6
SOT23-6
SOT23-6
SC70-6
10
50
50
SOT23-6
SOT23-6
SC70-6
50
100
100
100
10
SOT23-6
SOT23-6
SC70-6
10
SOT23-6
SOT23-6
SC70-6
10
50
50
SOT23-6
SOT23-6
SC70-6
50
100
100
100
10
SOT23-6
SOT23-6
SC70-5
10
SOT23-5
SOT23-5
SC70-5
10
50
50
SOT23-5
SOT23-5
SC70-5
50
100
100
100
SOT23-5
SOT23-5
(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.
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
11
Doc. No. MD-2121 Rev. G
CAT5120, CAT5121, CAT5122
REVISION HISTORY
Date
Rev. Description
10-Mar-05
27-Sep-06
A
B
Initial Issue
Update Electrical Characteristics
Update Ordering Information
Update Package Outlines
12-Mar-07
C
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
12-Mar-08
29-May-08
D
E
Delete 10,000 per reel option
Update Document Layout
21-Nov-08
013-Jul-09
F
Change logo and fine print to ON Semiconductor
Update Ordering Information table
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:
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
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
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative
Doc. No. MD-2121 Rev. G
12
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
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