Datasheet

4
®
ADS7818
TYPICAL PERFORMANCE CURVES
At T
A
= +25°C, V
CC
= +5V, f
SAMPLE
= 500kHz, f
CLK
= 16 • f
SAMPLE
, and internal +2.5V reference, unless otherwise specified.
CHANGE IN INTEGRAL LINEARITY and
DIFFERENTIAL LINEARITY vs SAMPLE RATE
400100 600200 300 500
Sample Rate (kHz)
Delta from f
SAMPLE
= 500kHz (LSB)
–0.3
0.4
0.3
0.2
0.1
0.0
–0.1
–0.2
Change in Differential
Linearity (LSB)
Change in Integral
Linearity (LSB)
CHANGE IN OFFSET vs TEMPERATURE
20–40 100–20 0 40
Temperature (°C)
Delta from 25°C (LSB)
–0.4
2.0
1.6
1.2
0.8
0.4
0.0
60 80
POWER-DOWN SUPPLY CURRENT
vs TEMPERATURE
20–40 100–20 0 40
Temperature (°C)
Power-down Supply Current (µA)
390
470
440
430
420
410
400
450
460
60 80
SUPPLY CURRENT vs TEMPERATURE
20–40 100–20 0 40
Temperature (°C)
Supply Current (mA)
1.6
2.3
2.1
2.0
1.9
1.8
1.7
2.2
60 80
f
SAMPLE
= 500kHz
f
SAMPLE
= 125kHz
SUPPLY CURRENT vs SAMPLE RATE
400100 600200 300 500
Sample Rate (kHz)
Supply Current (mA)
1.7
2.4
2.3
2.2
2.1
2.0
1.9
1.8
CHANGE IN FULL-SCALE ERROR
vs TEMPERATURE
20–40 100–20 0 40
Temperature (°C)
Delta from 25°C (LSB)
–10
2
0
–2
–4
–6
–8
60 80