ADS1204

SBAS301A − OCTOBER 2003 − REVISED JUNE 2004

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8

TYPICAL CHARACTERISTICS

AVDD = 5V, BVDD = 3V, CH x+ = +0.5V to +4.5V, CH x− = +2.5V, REFIN = external, CLKSEL = 0, and 16-bit Sinc3 filter, with OSR = 256, unless

otherwise noted.

INTEGRAL NONLINEARITY vs INPUT SIGNAL

(CLKIN = 20MHz)

0

−2.5 −2.0

−1.0 −0.5

−1.5

0.5

1.5

2.0

1.0

2.5

Differential Input Voltage (V)

1.5

1.0

0.5

0

−0.5

−1.0

−1.5

+25

_C

−40_C

+85

_C

INTEGRAL NONLINEARITY vs INPUT SIGNAL

(CLKIN = 32MHz)

0

−2.5 −2.0

−1.0 −0.5

−1.5

0.5

1.5

2.0

1.0

2.5

Differential Input Voltage (V)

1.5

1.0

0.5

0

−0.5

−1.0

−1.5

+25

_C

−40_C

+85

_C

INTEGRAL LINEARITY MATCH OF CHANNELS

vs INPUT SIGNAL

0

−2.5 −2.0

−1.0 −0.5

−1.5

0.5

1.5

2.0

1.0

2.5

Differential Input Voltage (V)

0.4

0.3

0.2

0.1

0

−0.1

−0.2

−0.3

−0.4

0.00061

0.00046

0.00031

0.00015

0

−0.00015

−0.00031

−0.00046

−0.00061

CLKIN = 32MHz

CLKIN = 20MHz

INTEGRAL LINEARITY vs TEMPERATURE

60

−40

−20

20

40

080

100

Temperature (

_C)

1.5

1.2

0.9

0.6

0.3

0

0.0023

0.0018

0.0014

0.0009

0.0005

0

CLKIN = 32MHz

CLKIN = 20MHz

OFFSET vs TEMPERATURE

60

−40

−20

20

40

080

100

Temperature (

_C)

−1.30

−1.35

−1.40

−1.45

−1.50

−1.55

−1.60

CLKIN = 20MHz

CLKIN = 32MHz

OFFSET MATCH vs TEMPERATURE

60

−40

−20

20

40

080

100

Temperature (

_C)

0.45

0.44

0.43

0.42

0.41

0.40

0.39

0.38

0.37

0.36

0.35

CLKIN = 32MHz

CLKIN = 20MHz