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PDF MCP4442 Data sheet ( Hoja de datos )
| Número de pieza | MCP4442 | |
| Descripción | 7/8-Bit Quad I2C Digital POT | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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MCP444X/446X
7/8-Bit Quad I2C 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)
• RAB 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
• I2C 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
VSS
P1B
P1W
P1A
1
2
3
4
5
6
7
8
9
10
20 P2A
19 P2W
18 P2B
17 VDD
16 A1
15 RESET
14 WP
12 P0B
12 P0W
11 P0A
TSSOP
P3B 1 20 19 18 17 16 15 VDD
HVC/A0 2
14 A1
SCL 3
SDA 4
EP
21
13 RESET
12 WP
VSS 5
11 P0B
6 7 8 9 10
4x4 QFN
MCP44X2 Quad Rheostat
P3W
P3B
HVC/A0
SCL
SDA
VSS
P1B
1 14
2 13
3 12
4 11
5 10
69
78
TSSOP
P2W
P2B
VDD
A1
P0B
P0W
P1W
© 2010 Microchip Technology Inc.
DS22265A-page 1
1 page  
MCP444X/446X
AC/DC CHARACTERISTICS (CONTINUED)
DC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
–40°C ≤ TA ≤ +125°C (extended)
All parameters apply across the specified operating ranges unless noted.
VDD = +2.7V to 5.5V, 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ devices.
Typical specifications represent values for VDD = 5.5V, TA = +25°C.
Parameters
Sym
Min Typ Max Units
Conditions
Resistance
(± 20%)
Resolution
RAB 4.0 5 6.0 kΩ -502 devices (Note 1)
8.0 10 12.0 kΩ -103 devices (Note 1)
40.0 50 60.0 kΩ -503 devices (Note 1)
80.0
100 120.0
kΩ -104 devices (Note 1)
N 257 Taps 8-bit No Missing Codes
129 Taps 7-bit No Missing Codes
Step Resistance
RS
—
RAB /
—
(256)
Ω 8-bit Note 6
—
RAB /
—
(128)
Ω 7-bit Note 6
Nominal
Resistance Match
(| RABWC -
RABMEAN |) /
RABMEAN
(| RBWWC -
RBWMEAN |) /
RBWMEAN
Wiper Resistance
(Note 3, Note 4)
Nominal
Resistance
Tempco
Ratiometeric
Tempco
RW
ΔRAB/ΔT
ΔVWB/ΔT
—
—
—
—
—
—
—
—
—
—
—
—
—
—
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
—
—
—
—
%
%
%
%
%
%
%
%
Ω
Ω
ppm/°C
ppm/°C
ppm/°C
ppm/°C
5 kΩ MCP44X1 devices only
10 kΩ
50 kΩ
100 kΩ
5 kΩ Code = Full Scale
10 kΩ
50 kΩ
100 kΩ
VDD = 5.5 V, IW = 2.0 mA, code = 00h
VDD = 2.7 V, IW = 2.0 mA, code = 00h
TA = -20°C to +70°C
TA = -40°C to +85°C
TA = -40°C to +125°C
Code = Midscale (80h or 40h)
Resistance
Tracking
ΔRTRACK
Section 2.0
ppm/°C See Typical Performance Curves
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 VW with VA = VDD and VB = VSS.
MCP44X1 only.
MCP44X2 only, includes VWZSE and VWFSE.
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 (RW), 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 = VIHH, the IDD current is less due to current into the HVC/A0 pin. See IPU specification.
© 2010 Microchip Technology Inc.
DS22265A-page 5
5 Page 
MCP444X/446X
AC/DC CHARACTERISTICS (CONTINUED)
DC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature
–40°C ≤ TA ≤ +125°C (extended)
All parameters apply across the specified operating ranges unless noted.
VDD = +2.7V to 5.5V, 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ devices.
Typical specifications represent values for VDD = 5.5V, TA = +25°C.
Parameters
Sym
Min Typ Max Units
Conditions
Weak Pull-up
Current
IPU
HVC Pull-up /
Pull-down
Resistance
RHVC
RESET Pull-up
Resistance
RRESET
Input Leakage
Current
IIL
Pin Capacitance
CIN, COUT
RAM (Wiper, TCON) Value
Value Range
N
TCON POR/BOR
Setting
—
—
1.75
mA Internal VDD pull-up, VIHH pull-down,
VDD = 5.5V, VHVC = 12.5V
— 170 — µA HVC pin, VDD = 5.5V, VHVC = 3V
— 16 — kΩ VDD = 5.5V, VHVC = 3V
— 16 — kΩ VDD = 5.5V, VRESET = 0V
-1 — 1 µA VIN = VDD (all pins) and
VIN = VSS (all pins except RESET)
— 10 — pF fC = 20 MHz
0h — 1FFh hex 8-bit device
0h — 1FFh hex 7-bit device
1FF hex All Terminals connected
EEPROM
Endurance
Endurance — 1M — Cycles
EEPROM Range
N
0h — 1FFh hex
Initial NV Wiper
POR/BOR Setting
Initial EEPROM
POR/BOR Setting
EEPROM
Programming
Write Cycle Time
N
N
tWC
080h
040h
000h
hex 8-bit
hex 7-bit
hex
WiperLock Technology = Off
WiperLock Technology = Off
— 3 10 ms
Power Requirements
Power Supply
Sensitivity
(MCP44X1)
PSS
— 0.0015 0.0035 %/% 8-bit VDD = 2.7V to 5.5V,
VA = 2.7V, Code = 80h
— 0.0015 0.0035 %/% 7-bit VDD = 2.7V to 5.5V,
VA = 2.7V, Code = 40h
Note 1: Resistance is defined as the resistance between terminal A to terminal B.
2: INL and DNL are measured at VW with VA = VDD and VB = VSS.
3: MCP44X1 only.
4: MCP44X2 only, includes VWZSE and VWFSE.
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 (RW), 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 = VIHH, the IDD current is less due to current into the HVC/A0 pin. See IPU specification.
© 2010 Microchip Technology Inc.
DS22265A-page 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MCP4442.PDF ] | |
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