ADC121C021_14 datasheet(2/44 Pages) TI1

Part #	ADC121C021

Description	I2C-Compatible, 12-Bit Analog-to-Digital Converter with Alert Function

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Manufacturer	TI1 [Texas Instruments]

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SDA

SCL

Lowest Conversion

Configuration

I

2C Serial Interface

ADC121C021/

ADC121C027

Conversion Result

High Limit

Low Limit

Pointer

Register

and

Decode

Logic

Alert

Set-Point

Comparator

ADDR*

Highest Conversion

12-Bit

Successive

Approximation

ADC

GND

VA

Hysteresis

VIN

Alert Status

ALERT*

T/H

Oscillator

REF

* Note: The ADC121C021 has the ALERT pin but no ADDR pin.

The ADC121C027 has the ADDR pin but no ALERT pin.

ALERT

SCL

SDA

V

IN

V

A

GND

1

2

3

5

4

6

ADC121C021/ADC121C021Q

ADDR

SCL

SDA

V

IN

V

A

GND

1

2

3

5

4

6

ADC121C027

ALERT

SDA

ADR1

V

A

GND

1

2

4

7

8

3

SCL

6

5

V

IN

ADC121C021

ADR0

ADC121C021, ADC121C021Q, ADC121C027

SNAS415F – JANUARY 2008 – REVISED MARCH 2013

www.ti.com

Pin-Compatible Alternatives (All devices are fully pin and function compatible across resolution)

Resolution

SOT (Alert only) and VSSOP

SOT (Addr only)

12-bit

ADC121C021

ADC121C027

10-bit

ADC101C021

ADC101C027

8-bit

ADC081C021

ADC081C027

Connection Diagrams

Figure 1. 6-Pin SOT

Figure 2. 6-Pin SOT

Figure 3. 8-Pin VSSOP

See DDC Package

See DGK Package

Block Diagram

2

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Product Folder Links: ADC121C021 ADC121C021Q ADC121C027

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ADC121C021 Datasheet(PDF) 2 Page - Texas Instruments

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