Datasheet

ADS7843
4
SBAS090B
www.ti.com
TYPICAL CHARACTERISTICS
At T
A
= +25°C, +V
CC
= +2.7V, V
REF
= +2.5V, f
SAMPLE
= 125kHz, and f
CLK
= 16 • f
SAMPLE
= 2MHz, unless otherwise noted.
SUPPLY CURRENT vs +V
CC
3.5252.5 4
+V
CC
(V)
Supply Current (µA)
320
300
280
260
240
220
200
180
4.53
f
SAMPLE
= 12.5kHz
V
REF
= +V
CC
MAXIMUM SAMPLE RATE vs +V
CC
3.5252.5 4
+V
CC
(V)
Sample Rate (Hz)
1M
100k
10k
1k
4.53
V
REF
= +V
CC
SUPPLY CURRENT vs TEMPERATURE
20–40 100–20 0 40
Temperature (°C)
Supply Current (µA)
400
350
300
250
200
150
100
60 80
CHANGE IN GAIN vs TEMPERATURE
20–40 100–20 0 40
Temperature (°C)
Delta from +25˚C (LSB)
0.15
0.10
0.05
0.00
–0.05
–0.10
–0.15
60 80
CHANGE IN OFFSET vs TEMPERATURE
20–40 100–20 0 40
Temperature (°C)
Delta from +25˚C (LSB)
0.6
0.4
0.2
0.0
–0.2
–0.4
–0.6
60 80
POWER-DOWN SUPPLY CURRENT
vs TEMPERATURE
20–40 100–20 0 40
Temperature (°C)
Supply Current (nA)
140
120
100
80
60
40
20
60 80