Datasheet

ADS1242, 1243
8
SBAS235H
www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
All specification V
DD
= +5V, f
OSC
= 2.4576MHz, PGA = 1, f
DATA
= 15Hz, and V
REF
≡ (REF IN+) – (REF IN–) = +2.5V, unless otherwise specified.
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
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)
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
260
250
240
230
220
210
200
190
CURRENT vs TEMPERATURE
(Buffer Off)
Current (µA)
Temperature (°C)
–50 –30 10–10 30 50 70 90
350
300
250
200
150
100
50
0
–50
CURRENT vs VOLTAGE
V
DD
(V)
3.0 3.25 3.5 3.75 4.0 4.25 4.5 4.75 5.0
Current (µA)
Normal
4.91MHz
Normal
2.45MHz
SLEEP
4.91MHz
SLEEP
2.45MHz
Power Down
300
250
200
150
100
50
0
SUPPLY 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