MCP413X/415X/423X/425X
7/8-Bit Single/Dual SPI Digital POT with 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 (typ.)
• Low Tempco:
- Absolute (Rheostat): 50 ppm typical
(0°C to 70°C)
- Ratiometric (Potentiometer): 15 ppm typical
• SPI Serial Interface (10 MHz, modes 0,0 & 1,1)
- High-Speed Read/Writes to wiper registers
- SDI/SDO multiplexing (MCP41X1 only)
• Resistor Network Terminal Disconnect Feature
via:
- Shutdown pin (SHDN)
- Terminal Control (TCON) Register
• Brown-out reset protection (1.5V typical)
• Serial Interface Inactive current (2.5 uA typ.)
• 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 (-3 dB) Operation:
- 2 MHz (typ.) 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. This
family of devices support 7-bit and 8-bit resistor
networks, and Potentiometer and Rheostat pinouts.
Package Types
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,
3x3 DFN
14
13
12
11
10
9
8
SHDN
NC
NC
P0B
P0W
11
10
9
8
P0A
V
DD
SDO
SHDN
NC
P0B
P0W
P0A
PDIP, SOIC, MSOP,
3x3 DFN
CS
SCK
SDI
V
SS
P1B
P1W
P1A
MCP42X1
Dual Potentiometers
1
2
3
4
5
6
7
PDIP, SOIC, TSSOP
SDO
7
P1A
CS
SCK
SDI
V
SS
V
SS
1
2
3
4
5
6
P1W
P1B
V
DD
16 15 14 13
12
4x4 QFN
MCP42X2
Dual Rheostat
CS
SCK
SDI
V
SS
P1B
1
2
3
4
5
10
9
8
7
6
V
DD
SDO
P0B
P0W
P1W
MSOP, DFN
©
2007 Microchip Technology Inc.
DS22060A-page 1
MCP413X/415X/423X/425X
Device Block Diagram
V
DD
V
SS
CS
SCK
SDI
SDO
NC
SHDN
For Dual Potentiometer
Devices Only
Power-up/
Brown-out
Control
SPI Serial
Interface
Module &
Control
Logic
(WiperLock™
Technology)
Resistor
Network 0
(Pot 0)
Wiper 0
& TCON
Register
P0A
P0W
P0B
P1A
P1W
Resistor
Network 1
(Pot 1)
Wiper 1
& TCON
Register
For Dual Resistor Network
Devices Only
Memory (4x9)
Wiper0
Wiper1
TCON
STATUS
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
1
2
2
2
2
2
Rheostat
Rheostat
Potentiometer
(1)
Rheostat
Potentiometer
(1)
Rheostat
Rheostat
Rheostat
Potentiometer
(1)
Rheostat
Rheostat
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
1 Potentiometer
(1)
SPI
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
MCP4152
(3)
2 Potentiometer
(1)
SPI
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.
DS22060A-page 2
©
2007 Microchip Technology Inc.
MCP413X/415X/423X/425X
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, 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:
Pdis = V
DD
x {I
DD
-
∑
I
OH
} +
∑
{(V
DD
-V
OH
) x I
OH
} +
∑(V
O
l x I
OL
)
©
2007 Microchip Technology Inc.
DS22060A-page 3
MCP413X/415X/423X/425X
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
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
Conditions
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)
Parameters
Supply Voltage
CS, SDI, SDO,
SCK, 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)
RAM retention voltage (V
RAM
) < V
BOR
V
DDRR
(Note
9)
V/ms
T
BORD
—
10
20
µs
I
DD
—
—
450
µA
—
—
2.5
0.55
5
1
µA
mA
Serial Interface Active,
V
DD
= 5.5V, CS = V
IL
, SCK @ 5 MHz,
write all
0
’s to volatile Wiper 0 (address
0h)
Serial Interface Inactive,
CS = V
IH
, V
DD
= 5.5V
Serial Interface Active,
V
DD
= 5.5V, CS = V
IHH
,
SCK @ 5 MHz,
decrement volatile Wiper 0 (address 0h)
Note 1:
Resistance is defined as the resistance between terminal A to terminal B.
2:
INL and DNL are measured at V
W
with V
A
= V
DD
and V
B
= V
SS
.
3: MCP4XX1
only.
4: MCP4XX2
only, includes V
WZSE
and V
WFSE
.
5:
Resistor terminals A, W and B’s polarity with respect to each other is not restricted.
6:
This specification by design.
7:
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.
DS22060A-page 4
©
2007 Microchip Technology Inc.
MCP413X/415X/423X/425X
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
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
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:
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
I
WL
—
—
100
100
—
—
nA
nA
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
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.
©
2007 Microchip Technology Inc.
DS22060A-page 5
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