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TYPICAL CHARACTERISTICS

70

75

80

85

90

95

1

10

100

1000

f -inputfrequency-kHz

i

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95

1

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1000

f -inputfrequency-kHz

i

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f -InputFrequency-kHz

i

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100

-55 -40 -25 -10 5

20 35 50 65 80 95 110 125

T -Free-Air-Temperature- C

A

°

f =250KSPS

f =20kHz

s

i

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80

85

90

95

100

105

1

10

100

1000

f -inputfrequency-kHz

i

70

75

80

85

90

95

100

-55 -40 -25-10

5

20 35 50 65 80 95 110 125

T -Free-Air-Temperature- C

A

°

f =250KSPS

f =20kHz

s

i

ADS8515

SLAS460A – JUNE 2007 – REVISED NOVEMBER 2007

Terminal Functions (continued)

D0 (LSB)

22

O

Data bit 0. Least significant bit (LSB) of conversion results. Hi-Z state when CS is high, or

when R/C is low.

R/C

24

I

With CS low and BUSY high, a falling edge on R/C initiates a new conversion. With CS

low, a rising edge on R/C enables the parallel output.

REF

3

Reference input/output. 2.2-

µF tantalum capacitor to ground.

27

Analog supply input. Nominally +5 V. Decouple to ground with 0.1-

µF ceramic and 10-µF

tantalum capacitors.

28

Digital supply input. Nominally +5 V. Connect directly to pin 27. Must be

1

Analog input. See Figure 24

TOTAL HARMONIC DISTORTION

SIGNAL-TO-NOISE RATIO

SIGNAL-TO-NOISE AND DISTORTION

vs

vs

vs

INPUT FREQUENCY

INPUT FREQUENCY

INPUT FREQUENCY

Figure 1.

Figure 2.

Figure 3.

SPURIOUS FREE DYNAMIC RANGE

SIGNAL-TO-NOISE RATIO

SIGNAL-TO-NOISE AND DISTORTION

vs

vs

vs

INPUT FREQUENCY

FREE-AIR TEMPERATURE

FREE-AIR TEMPERATURE

Figure 4.

Figure 5.

Figure 6.

6

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