
ADS1240, 1241
8
SBAS173F
www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
All specifications AVDD = +5V, DVDD = +5V, fOSC = 2.4576MHz, PGA = 1, fDATA = 15Hz, and VREF ≡ (REF IN+) – (REF IN–) = +2.5V, unless otherwise specified.
900
800
700
600
500
400
300
200
100
0
ANALOG CURRENT vs PGA
PGA Setting
I ANALOG
(
A)
1
2
4
8
16
128
64
32
AV
DD = 5V, Buffer = ON
AV
DD = 3V, Buffer = ON
Buffer = OFF
1.00010
1.00006
1.00002
0.99998
0.99994
0.99990
0.99986
GAIN vs TEMPERATURE
(Cal at 25
°C)
Temperature (
°C)
–50
–30
10
–10
30
50
70
90
Gain
(Normalized)
50
0
–50
–100
–150
–200
OFFSET vs TEMPERATURE
(Cal at 25
°C)
Offset
(ppm
of
FS)
PGA1
PGA128
PGA64
Temperature (
°C)
–50
–30
10
–10
30
50
70
90
PGA16
10
8
6
4
2
0
–2
–4
–6
–8
–10
INTEGRAL NONLINEARITY vs INPUT SIGNAL
V
IN (V)
–2.5 –2.0
–1.0 –0.5
–1.5
0
0.5
1.0
1.5
2.0
2.5
INL
(ppm
of
FS)
–40
°C
+25
°C
+85
°C
150
140
130
120
110
100
90
80
70
60
50
ANALOG CURRENT vs TEMPERATURE
Current
(
A)
Temperature (
°C)
–50
–30
10
–10
30
50
70
90
AV
DD = 5
AV
DD = 3
Buffer OFF
300
250
200
150
100
50
0
DIGITAL CURRENT vs SUPPLY
V
DD (V)
3.0
3.5
4.0
4.5
5.0
I DIGITAL
(
A)
Normal
4.91MHz
Normal
2.45MHz
SLEEP
2.45MHz
Power Down
SLEEP
4.91MHz