Snap

Back

GND

D1

PIN

V+

2.1k

41.5k

41.5k

Snap

Back

GND

D1

PIN

ADC101C021, ADC101C027

SNAS446D – FEBRUARY 2008 – REVISED FEBRUARY 2013

www.ti.com

PIN DESCRIPTIONS

Symbol

Type

Equivalent Circuit

Description

Power and unbufferred reference voltage. VA must be free

VA

Supply

of noise and decoupled to GND.

GND

Ground

Ground for all on-chip circuitry.

VIN

Analog Input

See Figure 19

Analog input. This signal can range from GND to VA.

Alert output. Can be configured as active high or active low.

ALERT

Digital Output

This is an open drain data line that must be pulled to the

supply (VA) with an external pull-up resistor.

Serial Clock Input. SCL is used together with SDA to control

the transfer of data in and out of the device. This is an open

drain data line that must be pulled to the supply (VA) with an

SCL

Digital Input

external pull-up resistor. This pin's extended ESD tolerance(

8kV HBM) allows extension of the I2C bus across multiple

boards without extra ESD protection.

Serial Data bi-directional connection. Data is clocked into or

out of the internal 16-bit register with SCL. This is an open

Digital

drain data line that must be pulled to the supply (VA) with an

SDA

Input/Output

external pull-up resistor. This pin's extended ESD tolerance(

8kV HBM) allows extension of the I2C bus across multiple

boards without extra ESD protection.

Tri-level Address Selection Input. Sets Bits A0 & A1 of the

ADR0

7-bit slave address. (see Table 3)

Digital Input,

three levels

Tri-level Address Selection Input. Sets Bits A2 & A3 of the

ADR1

7-bit slave address. (see Table 3)

Table 2. Package Pinouts

VA

GND

VIN

ALERT

SCL

SDA

ADR0

ADR1

ADC101C021

1

2

3

4

5

6

N/A

N/A

SOT-6

ADC101C027

1

2

3

N/A

5

6

4

N/A

SOT-6

ADC101C021

5

7

4

2

1

8

3

6

VSSOP-8

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

4

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