DAC2932

SBAS279D − AUGUST 2003 − REVISED JULY 2005

www.ti.com

13

TYPICAL CHARACTERISTICS (continued)

TA = +25°C, +VA = +VAV = +3V, +VD = +VDV = +3V, IOUTFS = 2mA, differential transformer-coupled output (n = 4:1), RL = 400Ω on I-DAC,

RL = 2kΩ on V-DAC, and GSET = H unless otherwise noted.

Figure 21

−10

−20

−30

−40

−50

−60

−70

−80

−90

−100

−110

02

468

10

12

16

14

18

20

Frequency (MHz)

DUAL−TONE OUTPUT SPECTRUM

f1 =1.2MHz

f2 =2.2MHz

fCLK =40MSPS

Figure 22

−10

−20

−30

−40

−50

−60

−70

−80

−90

−100

−110

02

46

8

10

12

16

14

18

20

Frequency (MHz)

FOUR−TONE OUTPUT SPECTRUM

f1 =1.2MHz

f2 =2.2MHz

f3 =3.2MHz

f4 =4.2MHz

fCLK =40MSPS

Figure 23

−60

−70

−80

−90

−100

−110

−120

024

6

8

10

12

16

14

18

20

Frequency (MHz)

I−DAC CHANNEL ISOLATION vs fOUT AT 40MSPS

Channel 1

Channel 2

Figure 24

V−DAC, INL

0

16

12

8

4

0

−4

−8

−12

−16

500

1000 1500 2000 2500 3000 3500 4000

Codes

Figure 25

V−DAC, DNL

0

1.0

0.8

0.6

0.4

0.2

0

−0.2

−0.4

−0.6

−0.8

−1.0

500

1000 1500 2000 2500 3000 3500 4000

Codes

Figure 26

VOUT vs CODE

0

3.00

2.75

2.50

2.25

2.00

1.75

1.50

1.25

1.00

0.75

0.50

0.25

0

500

1000 1500 2000 2500 3000 3500 4000

Codes