
LTC2492
8
2492fd
INPUT VOLTAGE (V)
–3
INL
(ppm
OF
V
REF
)
–1
1
3
–2
0
2
–1.5
–0.5
0.5
1.5
2492 G27
2.5
–2
–2.5
–1
0
1
2
VCC = 5V
VREF = 5V
VIN(CM) = 2.5V
fO = GND
25°C, 90°C
– 45°C
TEMPERATURE ( C)
–45
100
CONVERSION
CURRENT
(
μ
A)
120
160
180
200
–15
15
30
90
2492 G24
140
–30
0
45
60
75
VCC = 5V
VCC = 2.7V
fO = GND
CS = GND
SCK = NC
SDO = NC
SDI = GND
FREQUENCY AT VCC (Hz)
0
–140
REJECTION
(dB)
–120
–80
–60
–40
0
20
100
140
2492 G22
–100
–20
80
180
220
200
40 60
120
160
VCC = 4.1V DC ±1.4V
VREF = 2.5V
IN+ = GND
IN– = GND
fO = GND
TA = 25°C
FREQUENCY AT VCC (Hz)
30600
–60
–40
0
30750
2492 G23
–80
–100
30650
30700
30800
–120
–140
–20
REJECTION
(dB)
VCC = 4.1V DC ±0.7V
VREF = 2.5V
IN+ = GND
IN– = GND
fO = GND
TA = 25°C
TEMPERATURE (°C)
–45
0
SLEEP
MODE
CURRENT
(μA)
0.2
0.6
0.8
1.0
2.0
1.4
–15
15
30
90
2492 G25
0.4
1.6
1.8
1.2
–30
0
45
60
75
VCC = 5V
VCC = 2.7V
fO = GND
CS = VCC
SCK = NC
SDO = NC
SDI = GND
OUTPUT DATA RATE (READINGS/SEC)
0
SUPPLY
CURRENT
(μA)
500
450
400
350
300
250
200
150
100
80
2492 G26
20
40
60
100
70
10
30
50
90
VCC = 5V
VCC = 3V
VREF = VCC
IN+ = GND
IN– = GND
SCK = NC
SDO = NC
SDI = GND
CS GND
fO = EXT OSC
TA = 25°C
FREQUENCY AT VCC (Hz)
1
0
–20
–40
–60
–80
–100
–120
–140
1k
100k
2492 G21
10
100
10k
1M
REJECTION
(dB)
VCC = 4.1V DC
VREF = 2.5V
IN+ = GND
IN– = GND
fO = GND
TA = 25°C
TEMPERATURE (°C)
–45 –30
300
FREQUENCY
(kHz)
304
310
–15
30
45
2492 G19
302
308
306
15
0
60
75
90
VCC = 4.1V
VREF = 2.5V
VIN = 0V
VIN(CM) = GND
fO = GND
VCC (V)
2.5
300
FREQUENCY
(kHz)
302
304
306
308
310
3.0
3.5
4.0
4.5
2492 G20
5.0
5.5
VREF = 2.5V
VIN = 0V
VIN(CM) = GND
fO = GND
TA = 25°C
TYPICAL PERFORMANCE CHARACTERISTICS
On-Chip Oscillator Frequency
vs Temperature
On-Chip Oscillator Frequency
vs VCC
PSRR vs Frequency at VCC
Conversion Current
vs Temperature
Sleep Mode Current
vs Temperature
Conversion Current
vs Output Data Rate
Integral Nonlinearity (2x Speed
Mode; VCC = 5V, VREF = 5V)