0

20

40

60

80

100

120

140

160

180

200

-

-

-

-

-

-

-

-

-

-

0

50

100

150

200

250

300

350

400

450

500

Frequency (Hz)

Gain = 1/64

8k FFT

V

= 0.5dBFS, 31.25Hz

THD = 113.1dB

SNR = 99.3dB

OUT

-

-

10

8

6

4

2

0

Absolute Gain Match (ppm)

30 Units

Gain Match over T = 40 C to +85

-

A

C

°

°

1500

1000

500

0

1000

1500

-

-

-

500

-55

-35

-15

5

25

45

65

85

105

125

Temperature ( C)

°

G = 1/1

G = 1/2

G = 1/4

G = 1/8

G = 1/16

G = 1/32

G = 1/64

10

8

6

4

2

0

Gain Error (ppm)

30 Units

Gain = 1/1

200

150

100

50

0

100

150

200

-

-

-

50

-

-55

-35

-15

5

25

45

65

85

105

125

Temperature ( C)

°

G = 1/1

G = 1/2

G = 1/4

G = 1/8

G = 1/16

G = 1/32

G = 1/64

10

8

6

4

2

0

Offset (ppm, FS)

30 Units

Gain = 1/1

DAC1280

SBAS432A – APRIL 2010 – REVISED SEPTEMBER 2010

www.ti.com

TYPICAL CHARACTERISTICS (continued)

At TA = +25°C, AVDD = +2.5V, AVSS = +2.5V, DVDD = +3.3V, CLK = 4.096MHz, VREF = +5V, and RREF = 30kΩ, unless

otherwise noted. Data acquired using circuit configuration shown in Figure 35. THD and SNR measured by ADS1282 (1ms

sampling and complement gain setting).

OUTPUT SPECTRUM

GAIN MATCH HISTOGRAM

Figure 8.

Figure 9.

GAIN ERROR vs TEMPERATURE

GAIN ERROR HISTOGRAM

Figure 10.

Figure 11.

OFFSET vs TEMPERATURE

OFFSET HISTOGRAM

Figure 12.

Figure 13.

8

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