PIN ASSIGNMENTS

1

2

3

4

5

10

9

8

7

6

REFIN

+VA

IN+

IN-

GND

+VBD

SDI

SCLK

SDO

CONVST

MSOP PACKAGE

(TOP VIEW)

1

2

3

4

5

10

9

8

7

6

(TOP VIEW)

SONPACKAGE

REFIN

+VA

IN+

IN-

GND

+VBD

SDI

SCLK

SDO

CONVST

TYPICAL CHARACTERISTICS

0

0.0005

0.001

0.0015

0.002

0.0025

0.003

0.0035

0.004

0.0045

0.005

4.5

4.75

5

5.25

5.5

+VA -SupplyVoltage-V

+VBD=2.7V,

V

=4.096V,

f =500KSPS,

T =30 C

ref

s

A

°

-0.5

-0.45

-0.4

-0.35

-0.3

-0.25

-0.2

4.5

4.75

5

5.25

5.5

+VA -SupplyVoltage-V

+VBD=2.7V,

V

=4.096V,

f =500KSPS,

T =30 C

ref

s

A

°

-0.35

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

2

2.5

3

3.5

4

4.5

5

V

-ReferenceVoltage-V

ref

+VBD=2.7V,

+VA =5V,

f =500KSPS,

T =30°C

s

A

ADS8319

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NO.

NAME

ANALOG PINS

1

REFIN

I

Reference (positive) input. Decouple with GND pin using 0.1-

µF bypass capacitor and 10-µF storage

capacitor.

3

+IN

I

Noninverting analog signal input

4

–IN

I

Inverting analog signal input. Note this input has a limited range of ±0.1 V, and typically it is grounded at the

input decoupling capacitor.

I/O PINS

Convert input. It also functions as the CS input in 3-wire interface mode. Refer to Description and Timing

6

CONVST

I

Diagrams sections for more details.

7

SDO

O

Serial data output.

8

SCLK

I

Serial I/O clock input. Data (on SDO o/p) is synchronized with this clock.

9

SDI

I

Serial data input. The SDI level at the start of a conversion selects the mode of operation such as CS or daisy

chain mode. It also serves as the CS input in 4-wire interface mode. Refer to Description and Timing

Diagrmas sections for more details.

POWER SUPPLY PINS

2

+VA

–

Analog power supply. Decoupled with GND pin.

5

GND

–

Device ground. Note this is a common ground pin for both analog power supply (+VA) and digital I/O supply

(+VBD).

10

+VBD

–

Digital I/O power supply. Decouple with GND pin.

OFFSET ERROR

GAIN ERROR

OFFSET ERROR

vs

vs

vs

SUPPLY VOLTAGE

SUPPLY VOLTAGE

REFERENCE VOLTAGE

Figure 3.

Figure 4.

Figure 5.

Copyright © 2008, Texas Instruments Incorporated

Submit Documentation Feedback

7

Product Folder Link(s): ADS8319