Datasheet

-1500
-1400
-1300
-1200
-1100
-1000
-900
-800
-700
-600
-500
-400
-300
-200
-100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
ChannelGainMatch(ppm)
100
90
80
70
60
50
40
30
20
10
0
NumberofOccurrences
High-SpeedMode
10Units
- 1500
- 1400
- 1300
- 1200
- 1100
- 1000
- 900
- 800
- 700
- 600
- 500
- 400
- 300
- 200
- 100
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
ChannelOffsetMatch( V)m
70
60
50
40
30
20
10
0
NumberofOccurrences
High-SpeedMode
10Units
-40 -20 0 20 40 60 80 100
Temperature( C)°
100
50
0
-50
-100
-150
-200
-250
-300
NormalizedOffset( V)m
300
250
200
150
100
50
0
-50
-100
NormalizedGainError(ppm)
120 125
Offset
Gain
2.40
2.41
2.42
2.43
2.44
2.45
2.46
2.47
2.48
2.49
2.50
2.51
2.52
2.53
2.54
2.55
2.56
2.57
2.58
2.59
2.60
VCOMVoltageOutput(V)
20
18
16
14
12
10
8
6
4
2
0
NumberofOccurrences
AVDD=5V
25Units,NoLoad
-40 -20 0 20 40 60 80 100
Temperature(°C)
1.36
1.34
1.32
1.30
1.28
1.26
1.24
1.22
ReferenceInputImpedance(k )W
13.6
13.4
13.2
13.0
12.8
12.6
12.4
12.2
ReferenceInputImpedance(k )W
120 125
High-Speedand
High-ResolutionModes
Low-SpeedMode
50
100
150
200
250
300
350
400
450
500
550
600
650
700
SamplingMatchError(ps)
40
35
30
25
20
15
10
5
0
NumberofOccurrences
30unitsover3productionlots,
inter-channelcombinations.
ADS1278
ADS1274
ADS1278
ADS1274
ADS1278
www.ti.com SBAS367F –JUNE 2007– REVISED FEBRUARY 2011
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25°C, High-Speed mode, AVDD = +5V, DVDD = +1.8V, IOVDD = +3.3V, f
CLK
= 27MHz, VREFP = 2.5V, and
VREFN = 0V, unless otherwise noted.
CHANNEL GAIN MATCH HISTOGRAM CHANNEL OFFSET MATCH HISTOGRAM
Figure 31. Figure 32.
OFFSET AND GAIN
vs TEMPERATURE VCOM VOLTAGE OUTPUT HISTOGRAM
Figure 33. Figure 34.
ADS1274/ADS1278 ADS1274 REFERENCE INPUT DIFFERENTIAL
SAMPLING MATCH ERROR HISTOGRAM IMPEDANCE vs TEMPERATURE
Figure 35. Figure 36.
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