Datasheet
0
20
40
60
80
100
120
140
160
180
200
-
-
-
-
-
-
-
-
-
-
0 50 100 150 200 250 300 350 400 450 500
Frequency (Hz)
Amplitude (dB)
Gain = 1/64
8k FFT
V = 0.5dBFS, 31.25Hz
THD = 113.1dB
SNR = 99.3dB
OUT
-
-
10
8
6
4
2
0
Occurrences
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
Absolute Gain Match (ppm)
30 Units
Gain Match over T = 40 C to +85-
A
C° °
1500
1000
500
0
1000
1500
-
-
-
500
Gain Error (ppm)
-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
Occurrences
-1000
-900
-800
-700
-600
-500
-400
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
Gain Error (ppm)
30 Units
Gain = 1/1
200
150
100
50
0
100
150
200
-
-
-
50
-
Offset (ppm, FS)
-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
Occurrences
-250
-225
-200
-175
-150
-125
-100
-75
-50
-25
0
25
50
75
100
125
150
175
200
225
250
Offset (ppm, FS)
30 Units
Gain = 1/1
DAC1280
SBAS432A –APRIL 2010–REVISED SEPTEMBER 2010
www.ti.com
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25°C, AVDD = +2.5V, AVSS = +2.5V, DVDD = +3.3V, CLK = 4.096MHz, V
REF
= +5V, and R
REF
= 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.
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