(数字电位器)MCP4018T-502ELT_PDF_C129156_2017-09-14.pdf_mcp4018程序

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MCP4017/18/19

Features

• Potentiometer or Rheostat configuration options

• 7-bit: Resistor Network Resolution

- 127 Resistors (128 Steps)

• Zero Scale to Full Scale Wiper operation

•R

Resistances: 5 kΩ, 10 kΩ, 50 kΩ, or 100 kΩ

• Low Wiper Resistance: 100Ω (typical)

• Low Tempco:

- Absolute (Rheostat): 50 ppm typical

(0°C to 70°C)

- Ratiometric (Potentiometer): 10 ppm typical

•Simple I

C Protocol with read & write commands

• Brown-out reset protection (1.5V typical)

• Power-on Default Wiper Setting (Mid-scale)

• Low-Power Operation:

- 2.5 µA Static Current (typical)

• Wide Operating Voltage Range:

- 2.7V to 5.5V - Device Characteristics

Specified

- 1.8V to 5.5V - Device Operation

Package Types

• Wide Bandwidth (-3 dB) Operation:

- 2 MHz (typical) for 5.0 kΩ device

• Extended temperature range (-40°C to +125°C)

• Very small package (SC70)

• Lead free (Pb-free) package

Device Features

MCP4018

SC70-6

MCP4019

SC70-5

Rheostat

SDA

SCL

SDA

SCL

Potentiometer

MCP4017

SC70-6

SDA

SCL

Device

Control

Interface

# of Steps

Wiper

Configuration

Memory

Type

Resistance (typical)

VDD

Operating

Range

(1)

PackageOptions (kΩ)

Wiper

(Ω)

MCP4017 I

C 128 Rheostat RAM 5.0, 10.0, 50.0, 100.0 75 1.8V to 5.5V SC70-6

MCP4018 I

C 128 Potentiometer RAM 5.0, 10.0, 50.0, 100.0 75 1.8V to 5.5V SC70-6

MCP4019 I

C 128 Rheostat RAM 5.0, 10.0, 50.0, 100.0 75 1.8V to 5.5V SC70-5

Note 1: Analog characteristics only tested from 2.7V to 5.5V

7-Bit Single I

C™ Digital POT with Volatile Memory in

SC70

MCP4017/18/19

Device Block Diagram

Comparison of Similar Microchip Devices

(1)

Device

Control

Interface

# of Steps

Wiper

Configuration

Memory

Type

Resistance (typical)

Operating

Range

(2)

Interface

WiperLock

Technology

PackageOptions (kΩ)

MCP4017 I

C 128 Rheostat RAM 5.0, 10.0, 50.0, 100.0 1.8V to 5.5V No No SC70-6

MCP4012 U/D 64 Rheostat RAM 2.1, 5.0, 10.0, 50.0 1.8V to 5.5V Yes No SOT-23-6

MCP4022 U/D 64 Rheostat EE 2.1, 5.0, 10.0, 50.0 2.7V to 5.5V Yes Yes SOT-23-6

MCP4132 SPI 129 Rheostat RAM 5.0, 10.0, 50.0, 100.0 1.8V to 5.5V Yes No PDIP-8,

SOIC-8,

MSOP-8,

DFN-8

MCP4142 SPI 129 Rheostat EE 5.0, 10.0, 50.0, 100.0 2.7V to 5.5V Yes Yes

MCP4152 SPI 257 Rheostat RAM 5.0, 10.0, 50.0, 100.0 1.8V to 5.5V Yes No

MCP4162 SPI 257 Rheostat EE 5.0, 10.0, 50.0, 100.0 2.7V to 5.5V Yes Yes

MCP4532 I

C 129 Rheostat RAM 5.0, 10.0, 50.0, 100.0 1.8V to 5.5V Yes No MSOP-8,

DFN-8

MCP4542 I

C 129 Rheostat EE 5.0, 10.0, 50.0, 100.0 2.7V to 5.5V Yes Yes

MCP4552 I

C 257 Rheostat RAM 5.0, 10.0, 50.0, 100.0 1.8V to 5.5V Yes No

MCP4562 I

C 257 Rheostat EE 5.0, 10.0, 50.0, 100.0 2.7V to 5.5V Yes Yes

MCP4018 I

C 128 Potentiometer RAM 5.0, 10.0, 50.0, 100.0 1.8V to 5.5V No No SC70-6

MCP4013 U/D 64 Potentiometer RAM 2.1, 5.0, 10.0, 50.0 1.8V to 5.5V Yes No SOT-23-6

MCP4023 U/D 64 Potentiometer EE 2.1, 5.0, 10.0, 50.0 2.7V to 5.5V Yes Yes SOT-23-6

MCP4019 I

C 128 Rheostat RAM 5.0, 10.0, 50.0, 100.0 1.8V to 5.5V No No SC70-5

MCP4014 U/D 64 Rheostat RAM 2.1, 5.0, 10.0, 50.0 1.8V to 5.5V Yes No SOT-23-5

MCP4024 U/D 64 Rheostat EE 2.1, 5.0, 10.0, 50.0 2.7V to 5.5V Yes Yes SOT-23-5

Note 1: This table is broken into three groups by a thick line (and color coding). The unshaded devices in this table

are the devices described in this data sheet, while the shaded devices offer a comparable resistor network

configuration.

2: Analog characteristics only tested from 2.7V to 5.5V

Power-up/

Brown-out

Control

C Serial

Interface

Module,

Control

Logic, &

Resistor

Network 0

(Pot 0)

SCL

SDA

(2)

(1, 2)

Note 1

Note 1: Some configurations will have this

signal internally connected to ground.

2: In some configurations, this signal

may not be connected externally

Memory

(internally floating or grounded).

MCP4017/18/19

Resistance

(± 20%)

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)

Resolution N 128 Taps No Missing Codes

Step Resistance R

—R

(127)

— Ω Note 5

Wiper Resistance R

— 100 170 Ω V

= 5.5 V, I

= 2.0 mA, code = 00h

— 155 325 Ω V

= 2.7 V, I

= 2.0 mA, code = 00h

Nominal

Resistance

Tempco

ΔR

/ΔT — 50 — ppm/°C T

= -20°C to +70°C

— 100 — ppm/°C T

= -40°C to +85°C

— 150 — ppm/°C T

= -40°C to +125°C

Ratiometeric

Tempco

ΔV

/ΔT — 15 — ppm/°C Code = Midscale (3Fh)

Resistor Terminal

Input Voltage

Range (Terminals

A, B and W)

Vss — V

V Note 4, Note 5

Maximum current

through Terminal

(A, W or B)

Note 5

— — 2.5 mA Terminal A

, W = Full Scale (FS)

— — 2.5 mA Terminal B

, W = Zero Scale (ZS)

— — 2.5 mA Terminal W

or I

, W = FS or ZS

— — 1.38 mA

Terminal A

and

Terminal B

, V

= 0V, V

= 5.5V,

AB(MIN)

= 4000

— — 0.688 mA

, V

= 0V, V

= 5.5V,

AB(MIN)

= 8000

— — 0.138 mA

, V

= 0V, V

= 5.5V,

AB(MIN)

= 40000

— — 0.069 mA

, V

= 0V, V

= 5.5V,

AB(MIN)

= 80000

AC/DC CHARACTERISTICS (CONTINUED)

DC Characteristics

Standard Operating Conditions (unless otherwise specified)

Operating Temperature –40°C ≤ T

≤ +125°C (extended)

All parameters apply across the specified operating ranges unless noted.

= +2.7V to 5.5V, 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ devices.

Typical specifications represent values for V

= 5.5V, T

= +25°C.

Parameters Sym Min Typ Max Units Conditions

Note 1: Resistance is defined as the resistance between terminal A to terminal B.

2: INL and DNL are measured at V

with V

= V

and V

= V

3: MCP4018 device only, includes V

WZSE

and V

WFSE

4: Resistor terminals A, W and B’s polarity with respect to each other is not restricted.

5: This specification by design.

6: Non-linearity is affected by wiper resistance (R

), which changes significantly over voltage and

temperature.

7: POR/BOR is not rate dependent.

8: Supply current is independent of current through the resistor network

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