Datasheet

ADS1240, 1241
8
SBAS173F
www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
All specifications AV
DD
= +5V, DV
DD
= +5V, f
OSC
= 2.4576MHz, PGA = 1, f
DATA
= 15Hz, and V
REF
≡ (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
(µA)
1 2 4 8 16 1286432
AV
DD
= 5V, Buffer = ON
AV
DD
= 3V, Buffer = ON
Buffer = OFF
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 (µA)
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
(µA)
Normal
4.91MHz
Normal
2.45MHz
SLEEP
2.45MHz
Power Down
SLEEP
4.91MHz