MCP444X/446X
7/8-Bit Quad I
2
C Digital POT with
Nonvolatile 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
• Nonvolatile Memory
- Automatic Recall of Saved Wiper Setting
- WiperLock™ Technology
- 5 General Purpose Memory Locations
• I
2
C Serial Interface
- 100 kHz, 400 kHz, and 3.4 MHz support
• Serial protocol allows:
- High-Speed Read/Write to wiper
- Read/Write to EEPROM
- Write Protect to be enabled/disable
- WiperLock to be enabled/disabled
• 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
(except SCL and SDA)
• 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: 4x4 QFN-20, TSSOP-20 and
TSSOP-14
Package Types (Top View)
MCP44X1
Quad Potentiometers
P3A
P3W
P3B
HVC/A0
SCL
SDA
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
A1
RESET
WP
P0B
P0W
P0A
TSSOP
P3W
P2W
P3A
P2A
P2B
15
13
12
11
6
P1B
7
P1W
8
P1A
9 10
P0W
P0A
20 19 18 17 16
P3B
HVC/A0
SCL
SDA
V
SS
1
2
3
4
5
EP
21
V
DD
RESET
WP
P0B
14 A1
4x4 QFN
MCP44X2
Quad Rheostat
P3W
P3B
HVC/A0
SCL
SDA
V
SS
P1B
1
2
3
4
5
6
7
14
13
12
11
10
9
8
TSSOP
P2W
P2B
V
DD
A1
P0B
P0W
P1W
©
2010 Microchip Technology Inc.
DS22265A-page 1
MCP444X/446X
Device Block Diagram
V
DD
V
SS
A1
HVC/A0
SCL
SDA
WP
RESET
Power-up/
Brown-out
Control
I
2
C
Serial
Interface
Module &
Control
Logic
(WiperLock™
Technology)
Resistor
Network 0
(Pot 0)
Wiper 0
& TCON0
Register
P0A
P0W
P0B
P1A
P1W
Resistor
Network 1
(Pot 1)
Wiper 1
& TCON0
Register
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
P2W
Resistor
Network 2
(Pot 2)
Wiper 2
& TCON1
Register
P2B
P3A
P3W
Resistor
Network 3
(Pot 3)
Wiper 3
& TCON1
Register
P3B
Device Features
WiperLock
Technology
POR Wiper
Setting
# of POTs
# of Taps
Memory
Type
Resistance (typical)
R
AB
Options (kΩ)
Wiper
- R
W
(Ω)
75
75
75
75
75
75
75
75
Control
V
DD
Operating
Range
(2)
Device
Wiper
Configuration
MCP4431
(3)
MCP4432
(3)
MCP4441
MCP4442
MCP4451
(3)
MCP4452
MCP4461
MCP4462
Note 1:
2:
3:
(3)
4 Potentiometer
(1)
I
2
C
4
4
4
4
4
4
Rheostat
Rheostat
Potentiometer
(1)
Rheostat
Potentiometer
(1)
Rheostat
I
2
C
I
2
C
I
2
C
I C
I
2
C
I
2
C
2
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
4 Potentiometer
(1)
I
2
C
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.
DS22265A-page 2
©
2010 Microchip Technology Inc.
MCP444X/446X
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 HVC/A0, A1, SCL, SDA, WP, and
RESET with respect to V
SS ...................................
-0.6V to 12.5V
Voltage on all other pins (PxA, PxW, and PxB)
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 ed
......................................................................................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
©
2010 Microchip Technology Inc.
DS22265A-page 3
MCP444X/446X
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
≥
The HVC/A0 pin will be at one
4.5V
of three input levels
V
DD
< (V
IL
, V
IH
or V
IHH
). (Note
6)
4.5V
RAM retention voltage (V
RAM
) < V
BOR
Parameters
Supply Voltage
HVC/A0, SDA,
SCL, A1, 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
DDRR
(Note
9)
V/ms
T
BORD
—
10
20
µs
Serial Interface Active,
HVC/A0 = V
IH
(or V
IL
) (Note
11)
Write all
0’s
to volatile Wiper 0
V
DD
= 5.5V, F
SCL
@ 3.4 MHz
—
—
250
µA
Serial Interface Active,
HVC/A0 = V
IH
(or V
IL
) (Note
11)
Write all
0’s
to volatile Wiper 0
V
DD
= 5.5V, F
SCL
@ 100 kHz
—
—
575
µA
EE Write Current (Write Cycle)
(Nonvolatile device only),
V
DD
= 5.5V, F
SCL
= 400 kHz,
Write all
0’s
to Nonvolatile Wiper 0
SCL = V
IL
or V
IH
—
2.5
5
µA
Serial Interface Inactive,
(Stop condition, SCL = SDA = V
IH
),
Wiper = 0
V
DD
= 5.5V, HVC/A0 = V
IH
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: MCP44X1
only.
4: MCP44X2
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
MCP44X1
is externally connected to match the configurations of the
MCP44X2,
and then tested.
9:
POR/BOR is not rate dependent.
10:
Supply current is independent of current through the resistor network.
11:
When HVC/A0 = V
IHH
, the I
DD
current is less due to current into the HVC/A0 pin. See I
PU
specification.
I
DD
—
—
600
µA
DS22265A-page 4
©
2010 Microchip Technology Inc.
MCP444X/446X
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
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
Max
6.0
12.0
60.0
120.0
Units
kΩ
kΩ
kΩ
kΩ
Taps
Taps
Ω
Ω
%
%
%
%
%
%
%
%
Ω
Ω
ppm/°C
ppm/°C
ppm/°C
ppm/°C
Conditions
-502 devices
(Note
1)
-103 devices
(Note
1)
-503 devices
(Note
1)
-104 devices
(Note
1)
8-bit
No Missing Codes
7-bit
No Missing Codes
8-bit
Note 6
7-bit
Note 6
Parameters
Resistance
(± 20%)
Resolution
Step Resistance
N
R
S
—
—
—
—
1.50
1.25
1.0
1.0
1.75
1.50
1.25
1.25
160
300
—
—
—
—
Nominal
Resistance Match
(| R
ABWC
-
R
ABMEAN
|) /
R
ABMEAN
(| R
BWWC
-
R
BWMEAN
|) /
R
BWMEAN
Wiper Resistance
(Note
3, Note 4)
Nominal
Resistance
Tempco
R
W
ΔR
AB
/ΔT
Ratiometeric
ΔV
WB
/ΔT
Tempco
Resistance
ΔR
TRACK
Section 2.0
ppm/°C See
Typical Performance Curves
Tracking
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: MCP44X1
only.
4: MCP44X2
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
MCP44X1
is externally connected to match the configurations of the
MCP44X2,
and then tested.
9:
POR/BOR is not rate dependent.
10:
Supply current is independent of current through the resistor network.
11:
When HVC/A0 = V
IHH
, the I
DD
current is less due to current into the HVC/A0 pin. See I
PU
specification.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
5 kΩ
MCP44X1
devices only
10 kΩ
50 kΩ
100 kΩ
5 kΩ
Code = Full Scale
10 kΩ
50 kΩ
100 kΩ
V
DD
= 5.5 V, I
W
= 2.0 mA, code = 00h
V
DD
= 2.7 V, I
W
= 2.0 mA, code = 00h
T
A
= -20°C to +70°C
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C
Code = Midscale (80h or 40h)
©
2010 Microchip Technology Inc.
DS22265A-page 5
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