MCP4021/2/3/4
Low-Cost NV Digital POT with WiperLock™ Technology
Features
• Non-volatile Digital Potentiometer in SOT-23,
SOIC, MSOP and DFN packages
• 64 Taps: 63 Resistors with Taps to terminal A and
terminal B
• Simple Up/Down (U/D) Protocol
• Power-on Recall of Saved Wiper Setting
• Resistance Values: 2.1 kΩ, 5 kΩ, 10 kΩ or 50 kΩ
• Low Tempco:
- Absolute (Rheostat): 50 ppm (0°C to 70°C typ.)
- Ratiometric (Potentiometer): 10 ppm (typ.)
• Low Wiper Resistance: 75Ω (typ.)
• WiperLock™ Technology to Secure the wiper
setting in non-volatile memory (EEPROM)
• High-Voltage Tolerant Digital Inputs: Up to 12.5V
• Low-Power Operation: 1 µA Max Static Current
• Wide Operating Voltage: 2.7V to 5.5V
• Extended Temperature Range: -40°C to +125°C
• Wide Bandwidth (-3 dB) Operation:
- 4 MHz (typ.) for 2.1 kΩ device
Package Types
MCP4021
SOIC, MSOP, DFN
Potentiometer
V
DD
1
V
SS
2
A 3
W 4
A
W
B
8 U/D
7 NC
6 B
5 CS
V
DD
1
V
SS
2
U/D 3
B
MCP4022
SOT-23-6
Rheostat
A
W
6 A
5 W
4 CS
MCP4023
SOT-23-6
Potentiometer
V
DD
1
V
SS
2
U/D 3
B
A
W
6 A
5 W
4 CS
V
DD
1
V
SS
2
U/D 3
MCP4024
SOT-23-5
Rheostat
W
B
A
5 W
4 CS
Block Diagram
A
V
DD
Power-Up
and
Brown-Out
Control
Wiper Register
(Resistor Array)
Description
The MCP4021/2/3/4 devices are non-volatile, 6-bit
digital potentiometers that can be configured as either a
potentiometer or rheostat. The wiper setting is
controlled through a simple Up/Down (U/D) serial
interface.
These device’s implement Microchip’s WiperLock tech-
nology, which allows application-specific calibration
settings to be secured in the EEPROM without
requiring the use of an additional write-protect pin.
V
SS
CS
U/D
2-Wire
Interface
and
Control
Logic
W
EEPROM and
WiperLock™
Technology
B
Device Features
Device
Wiper
Configuration
Memory
Type
EE
EE
EE
EE
Resistance (typical)
Options (kΩ)
2.1, 5.0, 10.0, 50.0
2.1, 5.0, 10.0, 50.0
2.1, 5.0, 10.0, 50.0
2.1, 5.0, 10.0, 50.0
V
DD
# of
Control WiperLock™
Operating
Steps
Interface Technology
Wiper (Ω)
Range
75
75
75
75
64
64
64
64
2.7V - 5.5V
2.7V- 5.5V
2.7V - 5.5V
2.7V - 5.5V
U/D
U/D
U/D
U/D
Yes
Yes
Yes
Yes
MCP4021 Potentiometer
(1)
MCP4022
MCP4023
MCP4024
Note 1:
.
Rheostat
Potentiometer
Rheostat
Floating either terminal (A or B) allows the device to be used in Rheostat mode.
©
2006 Microchip Technology Inc.
DS21945E-page 1
MCP4021/2/3/4
1.0
ELECTRICAL
CHARACTERISTICS
† Notice:
Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied.
Exposure to maximum rating conditions for extended periods
may affect device reliability.
Absolute Maximum Ratings †
V
DD
.............................................................................................................
6.5V
CS and U/D inputs w.r.t V
SS....................................
-0.3V to 12.5V
A, B and W terminals w.r.t V
SS....................
-0.3V to V
DD
+ 0.3V
Current at Input Pins ..................................................±10 mA
Current at Supply Pins ...............................................±10 mA
Current at Potentiometer Pins ...................................±2.5 mA
Storage temperature .....................................-65°C to +150°C
Ambient temp. with power applied ................-55°C to +125°C
ESD protection on all pins
........... ≥
4 kV (HBM),
≥
400V (MM)
Maximum Junction Temperature (T
J
) . .........................+150°C
AC/DC CHARACTERISTICS
Electrical Specifications:
Unless otherwise indicated, all parameters apply across the specified operating ranges.
T
A
= -40°C to +125°C, 2.1 kΩ, 5 kΩ, 10 kΩ and 50 kΩ devices. Typical specifications represent values for V
DD
= 5.5V, V
SS
= 0V,
T
A
= +25°C.
Parameters
Operating Voltage Range
CS Input Voltage
Sym
V
DD
V
CS
Min
2.7
V
SS
Typ
—
—
Max
5.5
12.5
Units
V
V
The CS pin will be at one of three
input levels (V
IL
, V
IH
or V
IHH
).
(Note
6)
5.5V, CS = V
SS
, f
U/D
= 1 MHz
2.7V, CS = V
SS
, f
U/D
= 1 MHz
Serial Interface Inactive
(CS = V
IH
, U/D = V
IH
)
EE Write cycle, T
A
= +25°C
-202 devices
(Note 1)
-502 devices
(Note 1)
-103 devices
(Note 1)
-503 devices
(Note 1)
No Missing Codes
Note 6
Conditions
Supply Current
I
DD
—
—
—
—
45
15
0.3
0.6
2.1
5
10
50
64
R
AB
/ 63
—
—
1
3
2.52
6.0
12.0
60.0
—
µA
µA
µA
mA
kΩ
kΩ
kΩ
kΩ
Taps
Ω
Resistance
(± 20%)
R
AB
1.68
4.0
8.0
40.0
Resolution
Step Resistance
Note 1:
2:
3:
4:
N
R
S
—
Resistance is defined as the resistance between terminal A to terminal B.
INL and DNL are measured at V
W
with V
A
= V
DD
and V
B
= V
SS
. (-202 devices V
A
= 4V).
MCP4021/23
only, test conditions are: I
W
= 1.9 mA, code = 00h.
MCP4022/24
only, test conditions are:
Device
Resistance
2.1 kΩ
5 kΩ
10 kΩ
50 kΩ
Current at Voltage
5.5V
2.25 mA
1.4 mA
450 µA
90 µA
2.7V
1.1 mA
450 µA
210 µA
40 µA
MCP4022
includes V
WZSE
MCP4024
includes V
WFSE
Comments
5:
6:
7:
8:
Resistor terminals A, W and B’s polarity with respect to each other is not restricted.
This specification by design
Non-linearity is affected by wiper resistance (R
W
), which changes significantly over voltage and temperature. See
Section 6.0 “Resistor”
for additional information.
The
MCP4021
is externally connected to match the configurations of the
MCP4022
and
MCP4024,
and then tested.
DS21945E-page 2
©
2006 Microchip Technology Inc.
MCP4021/2/3/4
AC/DC CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Unless otherwise indicated, all parameters apply across the specified operating ranges.
T
A
= -40°C to +125°C, 2.1 kΩ, 5 kΩ, 10 kΩ and 50 kΩ devices. Typical specifications represent values for V
DD
= 5.5V, V
SS
= 0V,
T
A
= +25°C.
Parameters
Wiper Resistance (Note
3, Note 4)
Nominal Resistance Tempco
Sym
R
W
ΔR/ΔT
Min
—
—
—
—
—
Ratiometeric Tempco
Full-Scale Error
Zero-Scale Error
Monotonicity
Potentiometer Integral Non-linearity
Potentiometer Differential
Non-linearity
Resistor Terminal Input Voltage
Range (Terminals A, B and W)
Maximum current through A, W or B
Leakage current into A, W or B
ΔV
WA
/ΔT
V
WFSE
V
WZSE
N
INL
DNL
V
A,
V
W,
V
B
I
W
I
WL
-0.5
-0.5
Vss
—
—
—
—
Capacitance (P
A
)
Capacitance (P
w
)
Capacitance (P
B
)
Bandwidth -3 dB
C
AW
C
W
C
BW
BW
—
—
—
—
—
—
—
Note 1:
2:
3:
4:
—
-0.5
-0.5
Typ
70
70
50
100
150
10
-0.1
+0.1
Yes
±0.25
±0.25
—
—
100
100
100
75
120
75
4
2
1
200
+0.5
+0.5
V
DD
2.5
—
—
—
—
—
—
—
—
—
—
Max
125
325
—
—
—
—
+0.5
+0.5
Units
Ω
Ω
ppm/°C
ppm/°C
ppm/°C
ppm/°C
LSb
LSb
Bits
LSb
LSb
V
mA
nA
nA
nA
pF
pF
pF
MHz
MHz
MHz
kHz
MCP4021/23
only
(Note 2)
MCP4021/23
only
(Note 2)
Note 5, Note 6
Note 6
MCP4021
A = W = B = V
SS
MCP4022/23
A = W = V
SS
MCP4024
W = V
SS
f =1 MHz, code = 1Fh
f =1 MHz, code = 1Fh
f =1 MHz, code = 1Fh
-202
devices
-502
devices
-103
devices
-503
devices
Code = 1F,
output load = 30 pF
5.5V
2.7V
T
A
= -20°C to +70°C
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C
MCP4021
and
MCP4023
only,
code = 1Fh
Code 3Fh (MCP4021/23 only)
Code 00h (MCP4021/23 only)
Conditions
Resistance is defined as the resistance between terminal A to terminal B.
INL and DNL are measured at V
W
with V
A
= V
DD
and V
B
= V
SS
. (-202 devices V
A
= 4V).
MCP4021/23
only, test conditions are: I
W
= 1.9 mA, code = 00h.
MCP4022/24
only, test conditions are:
Device
Resistance
2.1 kΩ
5 kΩ
10 kΩ
50 kΩ
Current at Voltage
5.5V
2.25 mA
1.4 mA
450 µA
90 µA
2.7V
1.1 mA
450 µA
210 µA
40 µA
MCP4022
includes V
WZSE
MCP4024
includes V
WFSE
Comments
5:
6:
7:
8:
Resistor terminals A, W and B’s polarity with respect to each other is not restricted.
This specification by design
Non-linearity is affected by wiper resistance (R
W
), which changes significantly over voltage and temperature. See
Section 6.0 “Resistor”
for additional information.
The
MCP4021
is externally connected to match the configurations of the
MCP4022
and
MCP4024,
and then tested.
©
2006 Microchip Technology Inc.
DS21945E-page 3
MCP4021/2/3/4
AC/DC CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Unless otherwise indicated, all parameters apply across the specified operating ranges.
T
A
= -40°C to +125°C, 2.1 kΩ, 5 kΩ, 10 kΩ and 50 kΩ devices. Typical specifications represent values for V
DD
= 5.5V, V
SS
= 0V,
T
A
= +25°C.
Parameters
Rheostat Integral Non-linearity
MCP4021
(Note
4, Note 8)
MCP4022
and
MCP4024 (Note 4)
Sym
R-INL
Min
-0.5
-8.5
-0.5
-5.5
-0.5
-3
-0.5
-1
Rheostat Differential Non-linearity
MCP4021
(Note
4, Note 8)
MCP4022
and
MCP4024 (Note 4)
R-DNL
-0.5
-1
-0.5
-1
-0.5
-1
-0.5
-0.5
Note 1:
2:
3:
4:
Typ
±0.25
+4.5
±0.25
+2.5
±0.25
+1
±0.25
+0.25
±0.25
+0.5
±0.25
+0.25
±0.25
0
±0.25
0
Max
+0.5
+8.5
+0.5
+5.5
+0.5
+3
+0.5
+1
+0.5
+2
+0.5
+1.25
+0.5
+1
+0.5
+0.5
Units
LSb
LSb
LSb
LSb
LSb
LSb
LSb
LSb
LSb
LSb
LSb
LSb
LSb
LSb
LSb
LSb
-202
devices
(2.1 kΩ)
-502
devices
(5 kΩ)
-103
devices
(10 kΩ)
-503
devices
(50 kΩ)
-202
devices
(2.1 kΩ)
-502
devices
(5 kΩ)
-103
devices
(10 kΩ)
-503
devices
(50 kΩ)
Conditions
5.5V
2.7V
(Note 7)
5.5V
2.7V
(Note 7)
5.5V
2.7V
(Note 7)
5.5V
2.7V
(Note 7)
5.5V
2.7V
(Note 7)
5.5V
2.7V
(Note 7)
5.5V
2.7V
(Note 7)
5.5V
2.7V
(Note 7)
Resistance is defined as the resistance between terminal A to terminal B.
INL and DNL are measured at V
W
with V
A
= V
DD
and V
B
= V
SS
. (-202 devices V
A
= 4V).
MCP4021/23
only, test conditions are: I
W
= 1.9 mA, code = 00h.
MCP4022/24
only, test conditions are:
Device
Resistance
2.1 kΩ
5 kΩ
10 kΩ
50 kΩ
Current at Voltage
5.5V
2.25 mA
1.4 mA
450 µA
90 µA
2.7V
1.1 mA
450 µA
210 µA
40 µA
MCP4022
includes V
WZSE
MCP4024
includes V
WFSE
Comments
5:
6:
7:
8:
Resistor terminals A, W and B’s polarity with respect to each other is not restricted.
This specification by design
Non-linearity is affected by wiper resistance (R
W
), which changes significantly over voltage and temperature. See
Section 6.0 “Resistor”
for additional information.
The
MCP4021
is externally connected to match the configurations of the
MCP4022
and
MCP4024,
and then tested.
DS21945E-page 4
©
2006 Microchip Technology Inc.
MCP4021/2/3/4
AC/DC CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Unless otherwise indicated, all parameters apply across the specified operating ranges.
T
A
= -40°C to +125°C, 2.1 kΩ, 5 kΩ, 10 kΩ and 50 kΩ devices. Typical specifications represent values for V
DD
= 5.5V, V
SS
= 0V,
T
A
= +25°C.
Parameters
Digital Inputs/Outputs (CS, U/D)
Input High Voltage
Input Low Voltage
High-Voltage Input Entry Voltage
High-Voltage Input Exit Voltage
CS Pull-up/Pull-down Resistance
CS Weak Pull-up/Pull-down Current
Input Leakage Current
CS and U/D Pin Capacitance
RAM (Wiper) Value
Value Range
EEPROM
Endurance
EEPROM Range
Initial Factory Setting
Power Requirements
Power Supply Sensitivity
(MCP4021 and
MCP4023
only)
PSS
—
—
Note 1:
2:
3:
4:
0.0015
0.0015
0.0035
0.0035
%/%
%/%
V
DD
= 4.5V to 5.5V, V
A
= 4.5V,
Code = 1Fh
V
DD
= 2.7V to 4.5V, V
A
= 2.7V,
Code = 1Fh
E
ndurance
N
N
—
0h
1M
—
1Fh
—
3Fh
Cycles
hex
hex
WiperLock Technology = Off
N
0h
—
3Fh
hex
V
IH
V
IL
V
IHH
V
IHH
R
CS
I
PU
I
IL
C
IN
, C
OUT
0.7 V
DD
—
8.5
—
—
—
-1
—
—
—
—
—
16
170
—
10
—
0.3 V
DD
12.5
(6)
V
DD
+0.8
(6)
—
—
1
—
V
V
V
V
kΩ
µA
µA
pF
V
DD
= 5.5V, V
CS
= 3V
V
DD
= 5.5V, V
CS
= 3V
V
IN
= V
DD
f
C
= 1 MHz
Threshold for WiperLock™
Technology
Sym
Min
Typ
Max
Units
Conditions
Resistance is defined as the resistance between terminal A to terminal B.
INL and DNL are measured at V
W
with V
A
= V
DD
and V
B
= V
SS
. (-202 devices V
A
= 4V).
MCP4021/23
only, test conditions are: I
W
= 1.9 mA, code = 00h.
MCP4022/24
only, test conditions are:
Device
Resistance
2.1 kΩ
5 kΩ
10 kΩ
50 kΩ
Current at Voltage
5.5V
2.25 mA
1.4 mA
450 µA
90 µA
2.7V
1.1 mA
450 µA
210 µA
40 µA
MCP4022
includes V
WZSE
MCP4024
includes V
WFSE
Comments
5:
6:
7:
8:
Resistor terminals A, W and B’s polarity with respect to each other is not restricted.
This specification by design
Non-linearity is affected by wiper resistance (R
W
), which changes significantly over voltage and temperature. See
Section 6.0 “Resistor”
for additional information.
The
MCP4021
is externally connected to match the configurations of the
MCP4022
and
MCP4024,
and then tested.
©
2006 Microchip Technology Inc.
DS21945E-page 5
分立器件
