Datasheet

ADS7846
6
SBAS125H
www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
At T
A
= +25°C, +V
CC
= +2.7V, V
REF
= External +2.5V, f
SAMPLE
= 125kHz, and f
CLK
= 16 • f
SAMPLE
= 2MHz, unless otherwise noted.
REFERENCE CURRENT vs SAMPLE RATE
750 12525 50 100
Sample Rate (kHz)
Reference Current (µA)
14
12
10
8
6
4
2
0
REFERENCE CURRENT vs TEMPERATURE
20–40 100–20 0 40
Temperature (°C)
Reference Current (µA)
18
16
14
12
10
8
6
60 80
SWITCH-ON RESISTANCE vs TEMPERATURE
(X+, Y+: +V
CC
to Pin; X–, Y–: Pin to GND)
20–40 100–20
X+
Y+
Y–X–
40
Temperature (°C)
R
ON
(Ω)
1
8
7
6
5
4
3
2
60 800
2.4920
2.4915
2.4910
2.4905
2.4900
2.4895
2.4890
2.4885
2.4880
2.4875
Internal V
REF
(V)
Temperature (°C)
INTERNAL V
REF
vs TEMPERATURE
–40 –35 –30 –25 –20 –15 –10 –05
0
05 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85
SWITCH-ON RESISTANCE vs +V
CC
(X+, Y+: +V
CC
to Pin; X–, Y–: Pin to GND)
3.52.0 5.02.5
X+Y+
Y–
X–
4.0
+V
CC
(V)
R
ON
(Ω)
1
8
7
6
5
4
3
2
4.53.0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
Error (LSB)
20 40 60 80 100 120 140 160 180 200
Sampling Rate (kHz)
MAXIMUM SAMPLING RATE vs R
IN
INL: R = 2k
INL: R = 500
DNL: R = 2k
DNL: R = 500