MCP414X/416X/424X/426X
7/8-Bit Single/Dual SPI Digital POT with
Non-Volatile Memory
Features
• Single or Dual Resistor Network options
• Potentiometer or Rheostat configuration options
• Resistor Network Resolution
- 7-bit: 128 Resistors (129 Steps)
- 8-bit: 256 Resistors (257 Steps)
• R
AB
Resistances options of:
- 5 kΩ
- 10 kΩ
- 50 kΩ
- 100 kΩ
• Zero-Scale to Full-Scale Wiper operation
• Low Wiper Resistance: 75Ω (typical)
• Low Tempco:
- Absolute (Rheostat): 50 ppm typical
(0°C to 70°C)
- Ratiometric (Potentiometer): 15 ppm typical
• Non-volatile Memory
- Automatic Recall of Saved Wiper Setting
- WiperLock™ Technology
• SPI serial interface (10 MHz, modes 0,0 & 1,1)
- High-Speed Read/Writes to wiper registers
- Read/Write to Data EEPROM registers
- Serially enabled EEPROM write protect
- SDI/SDO multiplexing (MCP41X1 only)
• Resistor Network Terminal Disconnect Feature
via:
- Shutdown pin (SHDN)
- Terminal Control (TCON) Register
• Write Protect Feature:
- Hardware Write Protect (WP) Control pin
- Software Write Protect (WP) Configuration bit
• Brown-out reset protection (1.5V typical)
• Serial Interface Inactive current (2.5 uA typical)
• High-Voltage Tolerant Digital Inputs: Up to 12.5V
• Supports Split Rail Applications
• Internal weak pull-up on all digital inputs
• Wide Operating Voltage:
- 2.7V to 5.5V - Device Characteristics
Specified
- 1.8V to 5.5V - Device Operation
• Wide Bandwidth (-3dB) Operation:
- 2 MHz (typical) for 5.0 kΩ device
• Extended temperature range (-40°C to +125°C)
Description
The MCP41XX and MCP42XX devices offer a wide
range of product offerings using an SPI interface.
WiperLock Technology allows application-specific
calibration settings to be secured in the EEPROM.
Package Types (top view)
MCP41X1
Single Potentiometer
CS
SCK
SDI/SDO
V
SS
1
2
3
4
8
7
6
5
V
DD
P0B
P0W
P0A
MCP41X2
Single Rheostat
CS
1
8
V
DD
SCK
2
7
SDO
SDI
3
6
P0B
5
P0W
V
SS
4
PDIP, SOIC, MSOP
CS 1
SCK 2
SDI 3
V
SS
4
EP
9
8 V
DD
7 SDO
6 P0B
5 P0W
PDIP, SOIC, MSOP
CS 1
SCK 2
SDI/SDO 3
V
SS
4
EP
9
8 V
DD
7 P0B
6 P0W
5 P0A
3x3 DFN*
3x3 DFN*
CS
SCK
SDI
V
SS
P1B
P1W
P1A
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
DD
SDO SCK
SHDN SDI
WP
P0B V
SS
P0W V
SS
P0A
16 15 14 13
1
2
3
4
5
P1B
6
P1W
7
P1A
8
P0A
10 V
DD
EP
11
9 SDO
8 P0B
7 P0W
6 P1W
EP
17
12 WP
11 NC
10 P0B
9 P0W
PDIP, SOIC, TSSOP
4x4 QFN*
MCP42X2
Dual Rheostat
CS
SCK
SDI
V
SS
P1B
1
2
3
4
5
10
9
8
7
6
CS 1
V
DD
SDO SCK 2
P0B
P0W SDI 3
P1W V
SS
4
P1B 5
MSOP, DFN
3x3 DFN*
* Includes Exposed Thermal Pad (EP); see
Table 3-1.
©
2008 Microchip Technology Inc.
DS22059B-page 1
SHDN
MCP42X1
Dual Potentiometers
SDO
V
DD
CS
MCP414X/416X/424X/426X
Device Block Diagram
V
DD
V
SS
CS
SCK
SDI
SDO
WP
SHDN
For Dual Potentiometer
Devices Only
Power-up/
Brown-out
Control
SPI Serial
Interface
Module &
Control
Logic
(WiperLock™
Technology)
P0A
P0W
Resistor
Network 0
(Pot 0)
Wiper 0
& TCON
Register
P0B
P1A
P1W
Resistor
Network 1
(Pot 1)
Wiper 1
& TCON
Register
For Dual Resistor Network
Devices Only
Memory (16x9)
Wiper0 (V & NV)
Wiper1 (V & NV)
TCON
STATUS
Data EEPROM
(10 x 9-bits)
P1B
Device Features
WiperLock
Technology
POR Wiper
Setting
# of Steps
# of POTs
Control
Interface
Memory
Type
Resistance (typical)
R
AB
Options (kΩ)
Wiper
- R
W
(Ω)
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
Wiper
Configuration
V
DD
Operating
Range
(2)
Device
MCP4131
(3)
MCP4132
(3)
MCP4141
MCP4142
MCP4151
MCP4161
MCP4162
MCP4231
(3)
MCP4232
(3)
MCP4241
MCP4242
MCP4251
(3)
MCP4252
(3)
MCP4261
MCP4262
Note 1:
2:
3:
(3)
1 Potentiometer
(1)
SPI
1
1
1
1
1
2
2
2
2
2
Rheostat
Potentiometer
(1)
Rheostat
(1)
RAM
RAM
EE
EE
RAM
RAM
EE
EE
RAM
RAM
EE
EE
RAM
RAM
EE
EE
No
No
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes
No
No
Yes
Yes
Mid-Scale 5.0, 10.0, 50.0, 100.0
Mid-Scale 5.0, 10.0, 50.0, 100.0
NV Wiper 5.0, 10.0, 50.0, 100.0
NV Wiper 5.0, 10.0, 50.0, 100.0
Mid-Scale 5.0, 10.0, 50.0, 100.0
Mid-Scale 5.0, 10.0, 50.0, 100.0
NV Wiper 5.0, 10.0, 50.0, 100.0
NV Wiper 5.0, 10.0, 50.0, 100.0
Mid-Scale 5.0, 10.0, 50.0, 100.0
Mid-Scale 5.0, 10.0, 50.0, 100.0
NV Wiper 5.0, 10.0, 50.0, 100.0
NV Wiper 5.0, 10.0, 50.0, 100.0
Mid-Scale 5.0, 10.0, 50.0, 100.0
Mid-Scale 5.0, 10.0, 50.0, 100.0
NV Wiper 5.0, 10.0, 50.0, 100.0
NV Wiper 5.0, 10.0, 50.0, 100.0
129 1.8V to 5.5V
129 1.8V to 5.5V
129 2.7V to 5.5V
129 2.7V to 5.5V
257 1.8V to 5.5V
257 1.8V to 5.5V
257 2.7V to 5.5V
257 2.7V to 5.5V
129 1.8V to 5.5V
129 1.8V to 5.5V
129 2.7V to 5.5V
129 2.7V to 5.5V
257 1.8V to 5.5V
257 1.8V to 5.5V
257 2.7V to 5.5V
257 2.7V to 5.5V
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
1 Potentiometer
Rheostat
Rheostat
Rheostat
MCP4152
(3)
1 Potentiometer
(1)
SPI
2 Potentiometer
(1)
SPI
Potentiometer
(1)
Rheostat
Rheostat
Rheostat
2 Potentiometer
(1)
SPI
2 Potentiometer
(1)
SPI
Floating either terminal (A or B) allows the device to be used as a Rheostat (variable resistor).
Analog characteristics only tested from 2.7V to 5.5V unless otherwise noted.
Please check Microchip web site for device release and availability
DS22059B-page 2
©
2008 Microchip Technology Inc.
MCP414X/416X/424X/426X
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 †
Voltage on V
DD
with respect to V
SS
............... -0.6V to +7.0V
Voltage on CS, SCK, SDI, SDI/SDO, WP, and
SHDN with respect to V
SS ......................................
-0.6V to 12.5V
Voltage on all other pins (PxA, PxW, PxB, and
SDO) with respect to V
SS ............................
-0.3V to V
DD
+ 0.3V
Input clamp current, I
IK
(V
I
< 0, V
I
> V
DD
, V
I
> V
PP ON
HV pins) ......................±20 mA
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
DD
) ..................................................±20 mA
Maximum output current sunk by any Output pin
......................................................................................25 mA
Maximum output current sourced by any Output pin
......................................................................................25 mA
Maximum current out of V
SS
pin .................................100 mA
Maximum current into V
DD
pin ....................................100 mA
Maximum current into P
X
A, P
X
W & P
X
B pins ............±2.5 mA
Storage temperature ....................................-65°C to +150°C
Ambient temperature with power applied
.....................................................................-40°C to +125°C
Total power dissipation (Note
1)
................................400 mW
Soldering temperature of leads (10 seconds) ............. +300°C
ESD protection on all pins
.................................. ≥
4 kV (HBM),
..........................................................................
≥
300V (MM)
Maximum Junction Temperature (T
J
) ......................... +150°C
Note 1:
Power dissipation is calculated as follows:
P
dis
= V
DD
x {I
DD
-
∑
I
OH
} +
∑
{(V
DD
-V
OH
) x I
OH
} +
∑(V
OI
x I
OL
)
©
2008 Microchip Technology Inc.
DS22059B-page 3
MCP414X/416X/424X/426X
AC/DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
–40°C
≤
T
A
≤
+125°C (extended)
DC Characteristics
All parameters apply across the specified operating ranges unless noted.
V
DD
= +2.7V to 5.5V, 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ devices.
Typical specifications represent values for V
DD
= 5.5V, T
A
= +25°C.
Sym
V
DD
V
HV
Min
2.7
1.8
CS, SDI, SDO,
SCK, WP, SHDN
pin Voltage Range
V
DD
Start Voltage
to ensure Wiper
Reset
V
DD
Rise Rate to
ensure Power-on
Reset
Delay after device
exits the reset
state
(V
DD
> V
BOR
)
Supply Current
(Note 10)
V
SS
V
SS
V
BOR
—
Typ
—
—
—
—
—
Max
5.5
2.7
12.5V
V
DD
+
8.0V
1.65
Units
V
V
V
V
V
Serial Interface only.
V
DD
≥
4.5V
V
DD
<
4.5V
The CS pin will be at one
of three input levels
(V
IL
, V
IH
or V
IHH
). (Note
6)
Conditions
Parameters
Supply Voltage
RAM retention voltage (V
RAM
) < V
BOR
V
DDRR
(Note
9)
V/ms
T
BORD
—
10
20
µs
I
DD
—
—
450
µA
Serial Interface Active,
V
DD
= 5.5V, CS = V
IL
, SCK @ 5 MHz,
write all
0
’s to volatile Wiper 0 (address
0h)
EE Write Current,
V
DD
= 5.5V, CS = V
IL
, SCK @ 5 MHz,
write all
0
’s to non-volatile Wiper 0
(address 2h)
Serial Interface Inactive,
CS = V
IH
, V
DD
= 5.5V
Serial Interface Active,
V
DD
= 5.5V, CS = V
IHH
,
SCK @ 5 MHz,
decrement non-volatile Wiper 0
(address 2h)
—
—
1
mA
—
—
2.5
0.55
5
1
µA
mA
Note 1:
2:
3:
4:
5:
6:
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
.
MCP4XX1
only.
MCP4XX2
only, includes V
WZSE
and V
WFSE
.
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.
8:
The
MCP4XX1
is externally connected to match the configurations of the
MCP41X2
and
MCP42X2,
and
then tested.
9:
POR/BOR is not rate dependent.
10:
Supply current is independent of current through the resistor network
DS22059B-page 4
©
2008 Microchip Technology Inc.
MCP414X/416X/424X/426X
AC/DC CHARACTERISTICS (CONTINUED)
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
–40°C
≤
T
A
≤
+125°C (extended)
DC Characteristics
All parameters apply across the specified operating ranges unless noted.
V
DD
= +2.7V to 5.5V, 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ devices.
Typical specifications represent values for V
DD
= 5.5V, T
A
= +25°C.
Sym
R
AB
Min
4.0
8.0
40.0
80.0
Resolution
Step Resistance
N
R
S
—
—
Nominal
Resistance Match
|R
AB0
- R
AB1
|
/ R
AB
|R
BW0
- R
BW1
|
/ R
BW
Wiper Resistance
(Note
3, Note 4)
Nominal
Resistance
Tempco
Ratiometeric
Tempco
Resistor Terminal
Input Voltage
Range (Terminals
A, B and W)
Maximum current
through A, W or B
Leakage current
into A, W or B
Note 1:
2:
3:
4:
5:
6:
7:
R
W
ΔR
AB
/ΔT
—
—
—
—
—
—
—
ΔV
WB
/ΔT
V
A,
V
W,
V
B
—
Vss
Typ
5
10
50
100
257
129
R
AB
/
(256)
R
AB
/
(128)
0.2
0.25
75
75
50
100
150
15
—
—
—
1.25
1.5
160
300
—
—
—
—
V
DD
Max
6.0
12.0
60.0
120.0
Units
kΩ
kΩ
kΩ
kΩ
Taps
Taps
Ω
Ω
%
%
Ω
Ω
Conditions
-502 devices
(Note 1)
-103 devices
(Note 1)
-503 devices
(Note 1)
-104 devices
(Note 1)
8-bit
7-bit
8-bit
7-bit
No Missing Codes
No Missing Codes
Note 6
Note 6
Parameters
Resistance
(± 20%)
MCP42X1
devices only
MCP42X2
devices only,
Code = Full-Scale
V
DD
= 5.5 V, I
W
= 2.0 mA, code = 00h
V
DD
= 2.7 V, I
W
= 2.0 mA, code = 00h
ppm/°C T
A
= -20°C to +70°C
ppm/°C T
A
= -40°C to +85°C
ppm/°C T
A
= -40°C to +125°C
ppm/°C Code = Midscale (80h or 40h)
V
Note 5, Note 6
I
W
—
—
2.5
mA
Note 6,
Worst case current through
wiper when wiper is either Full-Scale or
Zero Scale.
MCP4XX1
PxA = PxW = PxB = V
SS
MCP4XX2
PxB = PxW = V
SS
I
WL
—
—
100
100
—
—
nA
nA
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
.
MCP4XX1
only.
MCP4XX2
only, includes V
WZSE
and V
WFSE
.
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.
8:
The
MCP4XX1
is externally connected to match the configurations of the
MCP41X2
and
MCP42X2,
and
then tested.
9:
POR/BOR is not rate dependent.
10:
Supply current is independent of current through the resistor network
©
2008 Microchip Technology Inc.
DS22059B-page 5
Embedded System
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