Datasheet

ADS1254
6
SBAS213B
www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
At T
A
= +25°C, AV
DD
= +5V, DV
DD
= +1.8V, CLK = 8MHz, and V
REF
= 4.096, unless otherwise specified.
CMR vs COMMON-MODE FREQUENCY
–70
–75
–80
–85
–90
–95
–100
–105
CMR (dB)
10 100 1k 10k 100k
Common-Mode Signal Frequency (Hz)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Current (mA)
CURRENT vs TEMPERATURE
–40 –20 0 20 40 60 80 100
Temperature (°C)
AV
DD
(5V)
DV
DD
(1.8V)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
POWER DISSIPATION vs CLK FREQUENCY
Clock Frequency (MHz)
012345 768
Power Dissipation (mW)
Analog (5V)
Digital (3.3V)
Digital (1.8V)
35
30
25
20
15
10
5
0
V
REF
CURRENT vs CLK FREQUENCY
Clock Frequency (MHz)
012345678
V
REF
Current (µA)
0
–20
–40
–60
–80
–100
–120
–140
–160
TYPICAL FFT
(1kHz input at 0.1dB less than full-scale)
Input Signal Frequency (kHz)
01234567891011
Relative Magnitude (dB)
CMR AT 60Hz vs CLK FREQUENCY
–50
–60
–70
–80
–90
–100
–110
CMR at 60Hz (dB)
Clock Frequency (MHz)
012345678