ADS7229 datasheet(21/46 Pages) TI

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Frequency(kHz)

100

-20

-40

-60

-80

-100

-120

-140

-160

200

300

400

500

10kHzInput

+VA=5V

f =1MSPS

=5V

REF

Frequency(kHz)

100

-20

-40

-60

-80

-100

-120

-140

-160

200

300

400

500

100kHzInput

+VA=5V

f =1MSPS

=5V

REF

OutputCode

9000

8000

7000

6000

5000

4000

3000

2000

1000

REF=2.5V

BVDD(V)

3.0

2.5

2.0

1.5

1.0

0.5

OutputCode

REF=5V

9000

8000

7000

6000

5000

4000

3000

2000

1000

2330

2331

2332

2333

2334

ADS7229

ADS7230

www.ti.com........................................................................................................................................................................................................ SBAS437 – MAY 2008

TYPICAL CHARACTERISTICS (continued)

At –40

°C to +85°C, V

REF [(REF+) – (REF–)] = 5V when +VA = +VBD = 5V or VREF [(REF+) – (REF–)] = 2.5V when +VA =

+VBD = 3V, fSCLK = 42MHz, or VREF = 2.5 when +VA = +VBD = 2.7V, fSCLK = 37.8MHz, and fi = dc for dc curves, fi = 100kHz

for ac curves with 5V supply and fi = 10kHz for ac curves with 3V supply, unless otherwise noted.

FFT

Figure 48.

Figure 49.

I/O SUPPLY CURRENT

vs I/O SUPPLY VOLTAGE

CODE HISTOGRAM

Figure 50.

Figure 51.

CODE HISTOGRAM

Figure 52.

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