Datasheet

250
200
150
100
50
0
50
100
150
200
250
-
-
-
-
-
V (V)
REF
VREFP,VREFNInputCurrent(nA)
5.00.5 1.0 1.5 2.0 2.5
VREFNInputCurrent
(VREFP=AVDD)
VREFPInputCurrent
(VREFN=AVSS)
3.0 3.5 4.0 4.5
0
25
50
75
100
125
150
175
200
225
250
-
-
-
-
-
-
-
-
-
-
Temperature( C)°
VREFP,VREFNInputCurrent(nA)
125-55 -35 -15 5 25 45 65 85 105
VREFPInputCurrent
VREFNInputCurrent
0.010
0.008
0.006
0.004
0.002
0
0.002
0.004
0.006
0.008
0.010
-
-
-
-
-
Time(s)
Settling(%ofFinalValue)
60 1 2 3 4
C =1 FX7Rm
REFIN
5
130
128
126
124
122
120
Temperature( C)°
DifferentialInputImpedance(k )W
125-55 -35 -15 5 25 45 65 85 105
InternalOscillator
ExternalCrystal
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
0 100 200 300 400 500 600 700 800 900 1000
Hours
Reference Voltage Stability (ppm)
48 units
G001
7.50
7.45
7.40
7.35
7.30
7.25
7.20
Temperature( C)°
InternalOscillator(MHz)
125-55 -35 -15 5 25 45 65 85 105
ADS1259
www.ti.com SBAS424D –JUNE 2009– REVISED AUGUST 2011
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25°C, AVDD = +2.5V, AVSS = –2.5V, DVDD = 3.3V, V
REF
= 2.5V, VREFN = AVSS, f
CLK
= 7.3728MHz, and
f
DATA
= 60SPS, unless otherwise noted.
REFERENCE INPUT CURRENT vs TEMPERATURE REFERENCE INPUT CURRENT vs REFERENCE VOLTAGE
Figure 26. Figure 27.
DIFFERENTIAL INPUT IMPEDANCE vs TEMPERATURE INTERNAL REFERENCE SETTLING TIME
Figure 28. Figure 29.
INTERNAL OSCILLATOR vs TEMPERATURE INTERNAL REFERENCE LONG-TERM STABILITY
Figure 30. Figure 31.
Copyright © 2009–2011, Texas Instruments Incorporated 11