Datasheet
LTC2411/LTC2411-1
9
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Offset Error vs Output Data Rate
Resolution (NOISE
RMS
≤ 1LSB)
vs Output Data Rate
OUTPUT DATA RATE (READINGS/SEC)
–120
OFFSET ERROR (ppm OF V
REF
)
–60
–20
40
–80
–100
–40
20
0
20 40 60 80
2411 G28
10010030507090
V
CC
= 5V
REF
–
= GND
V
INCM
= 2.5V
V
IN
= 0V
F
O
= EXT OSC
T
A
= 25°C
V
REF
= 2.5V
V
REF
= 5V
OUTPUT DATA RATE (READINGS/SEC)
0
RESOLUTION (BITS)
20
21
80
2411 G29
19
18
20
40
50
100
22
60
10
30
90
70
V
CC
= 5V
REF
–
= GND
V
INCM
= 2.5V
V
IN
= 0V
F
O
= EXT OSC
RES = LOG
2
(V
REF
/NOISE
RMS
)
T
A
= 25°C
V
REF
= 2.5V
V
REF
= 5V
Resolution (INL
MAX
≤ 1LSB)
vs Output Data Rate
OUTPUT DATA RATE (READINGS/SEC)
10
RESOLUTION (BITS)
14
18
22
12
16
20
20 40 60 80
2411 G30
10010030507090
V
CC
= 5V
REF
–
= GND
V
INCM
= 2.5V
V
IN
= 0V
F
O
= EXT OSC
RES = LOG
2
(V
REF
/INL
MAX
)
T
A
= 25°C
V
REF
= 2.5V
V
REF
= 5V
V
CC
(Pin 1): Positive Supply Voltage. Bypass to GND
(Pin␣ 6) with a 10µF tantalum capacitor in parallel with
0.1µF ceramic capacitor as close to the part as possible.
REF
+
(Pin 2), REF
–
(Pin 3): Differential Reference Input.
The voltage on these pins can have any value between GND
and V
CC
as long as the reference positive input, REF
+
, is
more positive than the reference negative input, REF
–
, by
at least 0.1V.
IN
+
(Pin 4), IN
–
(Pin 5): Differential Analog Input. The
voltage on these pins can have any value between
GND – 0.3V and V
CC
+ 0.3V. Within these limits, the
converter bipolar input range (V
IN
= IN
+
– IN
–
) extends
from –0.5 • (V
REF
) to 0.5 • (V
REF
). Outside this input
range, the converter produces unique overrange and
underrange output codes.
GND (Pin 6): Ground. Connect this pin to a ground plane
through a low impedance connection.
CS (Pin 7): Active LOW Digital Input. A LOW on this pin
enables the SDO digital output and wakes up the ADC.
Following each conversion the ADC automatically enters
UU
U
PI FU CTIO S
Conversion Current
vs Temperature
Sleep Mode Current
vs Temperature
TEMPERATURE (°C)
–45
CONVERSION CURRENT (µA)
200
210
220
75
2411 G25
190
180
160
–15
15
45
–30 90
0
30
60
170
240
230
F
O
= GND
CS = GND
SCK = NC
SDO = NC
V
CC
= 5.5V
V
CC
= 2.7V
V
CC
= 5V
V
CC
= 3V
Conversion Current
vs Output Data Rate
OUTPUT DATA RATE (READINGS/SEC)
0
SUPPLY CURRENT (µA)
450
550
650
80
2411 G26
350
250
400
500
600
300
200
150
2010
4030
60 70 90
50
100
REF
+
= V
CC
REF
–
= GND
IN
+
= GND
IN
–
= GND
T
A
= 25°C
SCK = NC
SDO = NC
CS = GND
F
O
= EXT OSC
V
CC
= 3V
V
CC
= 5V
TEMPERATURE (°C)
–45
SLEEP MODE CURRENT (µA)
1
2
3
75
2411 G27
0
–15
15
45
–30 90
0
30
60
5
4
F
O
= GND
CS = V
CC
SCK = NC
SDO = NC
V
CC
= 5.5V
V
CC
= 2.7V
V
CC
= 5V
V
CC
= 3V