LTC2410CGN Linear Technology, LTC2410CGN Datasheet - Page 33

• Manufacturer Part Number: LTC2410CGN
• Description: IC ADC 24BIT DIFF INP/REF 16SSOP
• Manufacturer: Linear Technology

Specifications of LTC2410CGN

• Number Of Bits: 24
• Sampling Rate (per Second): 7.5
• Data Interface: MICROWIRE™, Serial, SPI™
• Number Of Converters: 2
• Power Dissipation (max): 1mW
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP (0.150", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Q894257

APPLICATIO S I FOR ATIO
The combined normal mode rejection performance is
shown in Figure 37 for the internal oscillator with 50Hz
notch setting (F
oscillator with 60Hz notch setting (F
external oscillator mode. The regions of low rejection
occurring at integer multiples of f
bandwidth. Magnified details of the normal mode rejection
curves are shown in Figure 39 (rejection near DC) and
Figure 40 (rejection at f
notch frequency. These curves have been derived for the
external oscillator mode but they can be used in all
operating modes by appropriately selecting the f
The user can expect to achieve in practice this level of
performance using the internal oscillator as it is demon-
strated by Figures 41 and 42. Typical measured values of
–100
–120
Figure 41. Input Normal Mode Rejection vs Input Frequency
with Input Perturbation of 100% Full Scale (60Hz Notch)
– 60
–20
–40
–80
0
0
15
Figure 39. Input Normal Mode Rejection
30
–100
–110
–120
45
–10
–20
–30
–40
–50
–60
–70
–80
–90
O
0
= HIGH) and in Figure 38 for the internal
0
60
U
f
N
75
INPUT SIGNAL FREQUENCY (Hz)
S
2f
90
N
INPUT FREQUENCY (Hz)
= 256f
U
3f
105 120 135 150 165 180 195 210 225 240
N
4f
N
N
) where f
5f
MEASURED DATA
CALCULATED DATA
N
S
W
6f
O
N
have a very narrow
= LOW) and for the
7f
N
2410 F39
N
8f
represents the
N
U
V
REF
REF
V
V
F
T
O
A
CC
INCM
IN(P-P)
N
= GND
= 25 C
+
= 5V
–
= 5V
= GND
value.
= 2.5V
= 5V
2410 F41
the normal mode rejection of the LTC2410 operating with
an internal oscillator and a 60Hz notch setting are shown
in Figure 41 superimposed over the theoretical calculated
curve. Similarly, typical measured values of the normal
mode rejection of the LTC2410 operating with an internal
oscillator and a 50Hz notch setting are shown in Figure 42
superimposed over the theoretical calculated curve.
As a result of these remarkable normal mode specifica-
tions, minimal (if any) antialias filtering is required in front
of the LTC2410. If passive RC components are placed in
front of the LTC2410, the input dynamic current should be
considered (see Input Current section). In cases where
large effective RC time constants are used, an external
buffer amplifier may be required to minimize the effects of
dynamic input current.
–100
–120
Figure 42. Input Normal Mode Rejection vs Input Frequency
with Input Perturbation of 100% Full Scale (50Hz Notch)
–20
–40
– 60
–80
0
0
12.5 25 37.5 50 62.5 75 87.5 100 112.5 125 137.5 150 162.5 175 187.5 200
Figure 40. Input Normal Mode Rejection
–100
–110
–120
–10
–20
–30
–40
–50
–60
–70
–80
–90
250f
0
N
252f
INPUT SIGNAL FREQUENCY (Hz)
N
INPUT FREQUENCY (Hz)
254f
N
256f
N
258f
MEASURED DATA
CALCULATED DATA
N
260f
N
LTC2410
2410 F40
262f
N
V
REF
REF
V
V
F
T
O
A
CC
INCM
IN(P-P)
= 5V
= 25 C
33
+
–
= 5V
= 5V
= GND
= 2.5V
= 5V
2410 F42