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12-bit resolution

鹵1 LSB DNL, 鹵2 LSB INL max.

250 碌A(chǔ) max conversion current

5 nA typical standby current, 1 碌A(chǔ) max.

I

2

C鈩?compatible serial interface

- 100 kHz I

2

C Standard Mode

- 400 kHz I

2

C Fast Mode

Up to 8 devices on a single 2-Wire bus

22.3 ksps in I

2

C Fast Mode

Single-ended analog input channel

On-chip sample and hold

On-chip conversion clock

Single-supply specified operation: 2.7V to 5.5V

Temperature range:

- Industrial: -40擄C to +85擄C

- Extended: -40擄C to +125擄C

Small SOT-23 package

MCP3221

Description

The Microchip Technology Inc. MCP3221 is a succes-

sive approximation A/D converter with 12-bit resolu-

tion. Available in the SOT-23 package, this device

provides one single-ended input with very low power

consumption. Based on an advanced CMOS technol-

ogy, the MCP3221 provides a low maximum conver-

sion current and standby current of 250 碌A(chǔ) and 1 碌A(chǔ),

respectively. Low current consumption, combined with

the small SOT-23 package, make this device ideal for

battery-powered and remote data acquisition

applications.

Communication to the MCP3221 is performed using a

2-wire, I

2

C compatible interface. Standard (100 kHz)

and Fast (400 kHz) I

2

C modes are available with the

device. An on-chip conversion clock enables indepen-

dent timing for the I

2

C and conversion clocks. The

device is also addressable, allowing up to eight devices

on a single 2-wire bus.

The MCP3221 runs on a single supply voltage that

operates over a broad range of 2.7V to 5.5V. This

device also provides excellent linearity of 鹵1 LSB differ-

ential non-linearity and 鹵2 LSB integral non-linearity,

maximum.

Low Power 12-Bit A/D Converter With I

2

C鈩?Interface

鈥?/div>

Applications

鈥?/div>

Data Logging

Multi-zone Monitoring

Hand-Held Portable Applications

Battery-Powered Test Equipment

Remote or Isolated Data Acquisition

Functional Block Diagram

V

DD

V

SS

Package Type

5-Pin SOT-23A

SCL

Sample

and

Hold

Clock

DAC

Comparator

鈥?/div>

+

V

DD

1

V

SS

2

5

AIN

12-bit SAR

MCP3221

4 SDA

Control Logic

I

2

C鈩?Interface

SCL

SDA

AIN 3

錚?/div>

2003 Microchip Technology Inc.

DS21732B-page 1

型號

版本

描述

廠商

下載
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MCP3221 Datasheet

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