Datasheet

LTC2497
7
2497fa
V
REF
(V)
0
–0.3
OFFSET ERROR (ppm OF V
REF
)
–0.2
–0.1
0
0.1
0.2
0.3
1 2 3 4
2497 G10
5
V
CC
= 5V
REF
–
= GND
V
IN
= 0V
V
IN(CM)
= GND
T
A
= 25°C
f
O
= GND
TEMPERATURE (°C)
–45 –30
300
FREQUENCY (kHz)
304
310
–15
30
45
2497 G11
302
308
306
150
60 75
90
V
CC
= 4.1V
V
REF
= 2.5V
V
IN
= 0V
V
IN(CM)
= GND
f
O
= GND
V
CC
(V)
2.7
300
FREQUENCY (kHz)
302
304
306
308
310
3.0 3.5 4.0 4.5
2497 G12
5.0 5.5
V
REF
= 2.5V
V
IN
= 0V
V
IN(CM)
= GND
f
O
= GND
T
A
= 25°C
Typical perForMance characTerisTics
Offset Error vs V
REF
On-Chip Oscillator Frequency
vs Temperature
On-Chip Oscillator Frequency
vs V
CC
FREQUENCY AT V
CC
(Hz)
1
0
–20
–40
–60
–80
–100
–120
–140
1k 100k
2497 G13
10 100
10k 1M
REJECTION (dB)
V
CC
= 4.1V DC
V
REF
= 2.5V
IN
+
= GND
IN
–
= GND
f
O
= GND
T
A
= 25°C
FREQUENCY AT V
CC
(Hz)
0
–140
REJECTION (dB)
–120
–80
–60
–40
0
20
100
140
2497 G14
–100
–20
80
180
220200
40
60
120 160
V
CC
= 4.1V DC ±1.4V
V
REF
= 2.5V
IN
+
= GND
IN
–
= GND
f
O
= GND
T
A
= 25°C
FREQUENCY AT V
CC
(Hz)
30600
–60
–40
0
30750
2497 G15
–80
–100
30650 30700 30800
–120
–140
–20
REJECTION (dB)
V
CC
= 4.1V DC ±0.7V
V
REF
= 2.5V
IN
+
= GND
IN
–
= GND
f
O
= GND
T
A
= 25°C
TEMPERATURE (°C)
–45
100
CONVERSION CURRENT (µA)
120
160
180
200
–15
15
30 90
2497 G16
140
–30 0
45
60
75
V
CC
= 5V
V
CC
= 2.7V
f
O
= GND
SCL = 0
SDA = 1
TEMPERATURE (°C)
–45
0
SLEEP MODE CURRENT (µA)
0.2
0.6
0.8
1.0
2.0
1.4
–15
15
30 90
2497 G17
0.4
1.6
1.8
1.2
–30 0
45
60
75
V
CC
= 5V
V
CC
= 2.7V
f
O
= GND
SCL = 0
SDA = 1
OUTPUT DATA RATE (READINGS/SEC)
0
SUPPLY CURRENT (µA)
500
450
400
350
300
250
200
150
100
80
2497 G18
20 40 60 1007010 30 50 90
V
CC
= 5V
V
CC
= 3V
V
REF
= V
CC
IN
+
= GND
IN
–
= GND
SCL = 0
SDA = 1
T
A
= 25°C
PSRR vs Frequency at V
CC
PSRR vs Frequency at V
CC
PSRR vs Frequency at V
CC
Conversion Current
vs Temperature
Sleep Mode Current
vs Temperature
Conversion Current
vs Output Data Rate