ADS8509

SLAS324C – OCTOBER 2004 – REVISED APRIL 2010

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ELECTRICAL CHARACTERISTICS (continued)

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

mA

(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

mA

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

mA

High-level input current

±10

±10

mA

DIGITAL OUTPUTS

Data format (serial 16-bits)

Data coding (binary 2's

complement or straight binary)

Pipeline delay (conversion results

only available after completed

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

EXT/INT High

0.1

26

0.1

26

continually but not recommended

MHz

for optimum performance)

Low-level output voltage

0.4

0.4

V

High-level output voltage

4

4

V

Hi-Z State,

±5

±5

mA

Leakage current

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

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

mW

TEMPERATURE RANGE

Specified performance

–40

85

–40

85

°C

–55

125

–55

125

°C

Storage

–65

150

–65

150

°C

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

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