MCP434X/436X
7/8-Bit Quad SPI Digital POT with
Non-Volatile Memory
Features
• Quad Resistor Network
• Potentiometer or Rheostat configuration options
• Resistor Network Resolution
- 7-bit: 128 Resistors (129 Taps)
- 8-bit: 256 Resistors (257 Taps)
• R
AB
Resistances options of:
- 5 kΩ
- 10 kΩ
- 50 kΩ
- 100 kΩ
• Zero Scale to Full Scale Wiper operation
• Low Wiper Resistance: 75
Ω
(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
• Resistor Network Terminal Disconnect Feature
via Terminal Control (TCON) Register
• Reset input pin
• 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 (-3 dB) Operation:
- 2 MHz (typical) for 5.0 kΩ device
• Extended temperature range (-40°C to +125°C)
Package Types (Top View)
MCP43X1
Quad Potentiometers
P3A
P3W
P3B
CS
SCK
SDI
V
SS
P1B
P1W
P1A
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
12
12
11
P2A
P2W
P2B
V
DD
SDO
RESET
WP
P0B
P0W
P0A
TSSOP
P3W
P2W
P2A
P3A
P2B
15
13
12
11
6
P1B
7
P1W
8
P1A
9 10
P0W
P0A
20 19 18 17 16
P3B
CS
SCK
SDI
V
SS
1
2
3
4
5
EP
21
V
DD
RESET
WP
P0B
14 SDO
4x4 QFN
MCP43X2
Quad Rheostat
P3W
P3B
CS
SCK
SDI
V
SS
P1B
1
2
3
4
5
6
7
14
13
12
11
10
9
8
TSSOP
P2W
P2B
V
DD
SDO
P0B
P0W
P1W
©
2009 Microchip Technology Inc.
DS22233A-page 1
MCP434X/436X
Device Block Diagram
V
DD
V
SS
CS
SCK
SDI
SDO
WP
RESET
Power-up/
Brown-out
Control
SPI Serial
Interface
Module &
Control
Logic
(WiperLock™
Technology)
P0A
Resistor
Network 0
(Pot 0)
Wiper 0
& TCON0
Register
P0W
P0B
P1A
Resistor
Network 1
(Pot 1)
Wiper 1
& TCON0
Register
P1W
Memory (16x9)
Wiper0 (V & NV)
Wiper1 (V & NV)
Wiper2 (V & NV)
Wiper3 (V & NV)
TCON0
TCON1
STATUS
Data EEPROM
(5 x 9-bits)
P1B
P2A
Resistor
Network 2
(Pot 2)
Wiper 2
& TCON1
Register
P2W
P2B
P3A
Resistor
Network 3
(Pot 3)
Wiper 3
& TCON1
Register
P3W
P3B
Device Features
WiperLock
Technology
POR Wiper
Setting
# of POTs
Control
Interface
# of Taps
Memory
Type
Resistance (typical)
R
AB
Options (kΩ)
Wiper
- R
W
(Ω)
75
75
75
75
75
75
75
75
Wiper
Configuration
V
DD
Operating
Range
(2)
Device
MCP4331
(3)
MCP4332
(3)
MCP4341
MCP4342
MCP4351
(3)
MCP4352
(3)
MCP4361
MCP4362
Note 1:
2:
3:
4 Potentiometer
(1)
SPI
4
4
4
4
4
Rheostat
Rheostat
Rheostat
Potentiometer
(1)
Rheostat
SPI
SPI
SPI
SPI
SPI
4 Potentiometer
(1)
SPI
4 Potentiometer
(1)
SPI
RAM
RAM
EE
EE
RAM
RAM
EE
EE
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
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
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.
DS22233A-page 2
©
2009 Microchip Technology Inc.
MCP434X/436X
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
RESET 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
Package power dissipation (T
A
= +50°C, T
J
= +150°C)
TSSOP-14................................................................1000 mW
TSSOP-20................................................................ 1110 mW
QFN-20 (4x4) ...........................................................2320 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
©
2009 Microchip Technology Inc.
DS22233A-page 3
MCP434X/436X
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, RESET
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
.
MCP43X1
only.
MCP43X2
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
MCP43X1
is externally connected to match the configurations of the
MCP43X2,
and then tested.
9:
POR/BOR is not rate dependent.
10:
Supply current is independent of current through the resistor network.
DS22233A-page 4
©
2009 Microchip Technology Inc.
MCP434X/436X
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
ABWC
-
R
ABMEAN
|) /
R
ABMEAN
—
—
—
—
(| R
BWWC
-
R
BWMEAN
|) /
R
BWMEAN
—
—
—
—
Wiper Resistance
(Note
3, Note 4)
Nominal
Resistance
Tempco
Ratiometeric
Tempco
Note 1:
2:
3:
4:
5:
6:
7:
R
W
ΔR
AB
/ΔT
—
—
—
—
—
ΔV
WB
/ΔT
—
Typ
5
10
50
100
257
129
R
AB
/
(256)
R
AB
/
(128)
0.2
0.2
0.2
0.2
0.25
0.25
0.25
0.25
75
75
50
100
150
15
—
—
1.50
1.25
1.0
1.0
1.75
1.50
1.25
1.25
160
300
—
—
—
—
Max
6.0
12.0
60.0
120.0
Units
kΩ
kΩ
kΩ
kΩ
Taps
Taps
Ω
Ω
%
%
%
%
%
%
%
%
Ω
Ω
V
DD
= 5.5 V, I
W
= 2.0 mA, code = 00h
V
DD
= 2.7 V, I
W
= 2.0 mA, code = 00h
Code = Full Scale
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%)
MCP43X1
devices only
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)
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
.
MCP43X1
only.
MCP43X2
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
MCP43X1
is externally connected to match the configurations of the
MCP43X2,
and then tested.
9:
POR/BOR is not rate dependent.
10:
Supply current is independent of current through the resistor network.
©
2009 Microchip Technology Inc.
DS22233A-page 5
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