Datasheet

ADS1240, 1241
9
SBAS173F
www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
All specifications AV
DD
= +5V, DV
DD
= +5V, f
OSC
= 2.4576MHz, PGA = 1, f
DATA
= 15Hz, and V
REF
≡ (REF IN+) – (REF IN–) = +2.5V, unless otherwise specified.
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
OFFSET DAC
NOISE vs SETTING
Offset DAC Setting
Noise (rms, ppm of FS)
–128 –96 –64 –32 0 32 64 96 128
200
170
140
110
80
50
20
–10
–40
–70
–100
OFFSET DAC
OFFSET vs TEMPERATURE
(Cal at 25°C)
Offset (ppm of FSR)
Temperature (°C)
–50 –30 10–10 30 50 70 90
3500
3000
2500
2000
1500
1000
500
0
NOISE HISTOGRAM
10k Readings
V
IN
= 0V
ppm of FS
–3.5 –3.0
Number of Occurrences
–2.5 –2.0 –1.5 –1 –0.5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
1.00020
1.00016
1.00012
1.00008
1.00004
1.00000
0.99996
0.99992
0.99988
0.99984
0.99980
0.99976
OFFSET DAC
GAIN vs TEMPERATURE
(Cal at 25°C)
Gain (Normalized)
Temperature (°C)
–50 –30 10–10 30 50 70 90