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ADS8509

SLAS324A – OCTOBER 2004 – REVISED JUNE 2005

ELECTRICAL CHARACTERISTICS (continued)

At T

Figure 29 and Figure 30) (unless otherwise specified)

ADS8509I

ADS8509IB

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

REFERENCE

Internal reference voltage

No load

2.48

2.5

2.52

2.48

2.5

2.52

V

Internal reference source current

1

1

µA

(must use external buffer)

Internal reference drift

8

8

ppm/°C

External reference voltage range

2.3

2.5

2.7

2.3

2.5

2.7

V

for specified linearity

External reference current drain

Ext. 2.5-V Ref.

100

100

µA

DIGITAL INPUTS

Logic levels

Low-level input voltage

-0.3

0.8

-0.3

0.8

V

High-level input voltage

2.0

2.0

V

Low-level input current

±10

±10

µA

High-level input current

±10

±10

µA

DIGITAL OUTPUTS

Data format (Serial 16-bits)

Data coding (Binary 2's comp-

lement or straight binary)

Pipeline delay (Conversion re-

sults only available after com-

pleted conversion.)

Data clock (Selectable for

internal or external data clock)

Internal clock (output only when

EXT/INT Low

9

9

MHz

transmitting data)

External clock (can run continu-

EXT/INT High

0.1

26

0.1

26

ally but not recommended for

MHz

optimum performance)

Low-level output voltage

0.4

0.4

V

High-level output voltage

4

4

V

Leakage current

Hi-Z state,

±5

±5

µA

Output capacitance

Hi-Z state

15

15

pF

POWER SUPPLIES

Digital input voltage

4.75

5

5.25

4.75

5

5.25

V

Analog input voltage

4.75

5

5.25

4.75

5

5.25

V

Must be

≤ V

ANA

Digital input current

4

4

mA

Analog input current

10

10

mA

POWER DISSIPATION

PWRD Low

70

100

70

100

mW

PWRD High

50

50

µW

TEMPERATURE RANGE

Specified performance

-40

85

-40

85

°C

-55

125

-55

125

°C

Storage

-65

150

-65

150

°C

THERMAL RESISTANCE (

Θ

SSOP

62

62

°C/W

SO

46

46

°C/W

(9)

The internal reference may not be started correctly beyond the industrial temperature range (-40°C to 85°C), therefore use of an

external reference is recommended.

4