ADS7945 datasheet(21/51 Pages) TI2

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100

2.7

3.2

3.7

4.2

4.7

5.2

5.7

AVDD, Analog Supply Voltage (V)

fIN = 20 kHz

G063

100

2.5

3.5

4.5

5.5

Reference Voltage (V)

AVDD = 5.25 V

fIN = 20 kHz

G065

100

−40 −25 −10

110 125

Free-Air Temperature (°C)

AVDD = 3 V

fIN = 20 kHz

G064

100

fIN, Input Frequency (kHz)

AVDD = 3 V

G066

−140

−120

−100

−80

−60

−40

−20

100

Memory Crosstalk

Isolation Crosstalk

fIN, Input Frequency (kHz)

G071

2.5

3.5

4.5

2.7

3.2

3.7

4.2

4.7

5.2

5.7

AVDD, Analog Supply Voltage (V)

G038

ADS7945

ADS7946

www.ti.com

SBAS539B

– JUNE 2011 – REVISED SEPTEMBER 2011

TYPICAL CHARACTERISTICS: ADS7946 (continued)

At TA = +25°C, AVDD = 5 V, DVDD = 1.8 V, VREF = 2.5 V, and fSAMPLE = 2 MSPS, unless otherwise noted.

SFDR vs ANALOG SUPPLY VOLTAGE

SFDR vs REFERENCE VOLTAGE

Figure 62.

Figure 63.

SFDR vs FREE-AIR TEMPERATURE

SFDR vs INPUT FREQUENCY

Figure 64.

Figure 65.

ANALOG SUPPLY CURRENT (Dynamic)

CROSSTALK vs INPUT FREQUENCY

vs ANALOG SUPPLY VOLTAGE

Figure 66.

Figure 67.

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