TYPICAL CHARACTERISTICS (Cont.)
AVDD = +5V, DVDD = +5V, fOSC = 2.4576MHz, PGA = 1, RDAC = 150kΩ, fDATA = 10Hz, VREF ≡ (REF IN+) – (REF IN–) = +2.5V, unless otherwise specified.
CMRR vs FREQUENCY
NOISE vs INPUT SIGNAL
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
130
120
110
100
90
80
70
60
50
40
30
20
10
0
–2.5
–1.5
–0.5
0.5
1.5
2.5
1
10
100
1k
10k
100k
VIN (V)
Frequency of CM Signal (Hz)
OFFSET vs TEMPERATURE
PSRR vs FREQUENCY
120
110
100
90
80
70
60
50
40
30
20
10
0
50
0
PGA16
PGA1
–50
PGA64
–100
–150
–200
PGA128
–50
–30
–10
10
30
50
70
90
1
10
100
1k
10k
100k
Temperature (°C)
Frequency of Power Supply (Hz)
GAIN vs TEMPERATURE
INTEGRAL NON-LINEARITY vs INPUT SIGNAL
1.00010
1.00006
1.00002
0.99998
0.99994
0.99990
0.99986
10
8
–40°C
6
4
+85°C
2
0
–2
–4
–6
–8
–10
+25°C
–50
–30
–10
10
30
50
70
90
–2.5 –2 –1.5 –1 –0.5
0
0.5
1
1.5
2
2.5
Temperature (°C)
VIN (V)
ADS1218
9
SBAS187
BB [ BURR-BROWN CORPORATION ]
