LTC2440IGN#PBF Linear Technology, LTC2440IGN#PBF Datasheet - Page 20

• Manufacturer Part Number: LTC2440IGN#PBF
• Description: IC ADC DIFFER 24-BIT HS 16-SSOP
• Manufacturer: Linear Technology

Specifications of LTC2440IGN#PBF

• Number Of Bits: 24
• Sampling Rate (per Second): 3.5k
• Data Interface: MICROWIRE™, Serial, SPI™
• Number Of Converters: 2
• Power Dissipation (max): 40mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP (0.150", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LTC2440
APPLICATIONS INFORMATION
20
Table 5. OSR vs Notch Frequency (f
Running at 9MHz
*Simultaneous 50/60 rejection
Figure 12. LTC2440 Normal Mode Rejection (Internal Oscillator)
32768*
16384
–100
–110
–130
–140
–120
1024
2048
4096
8192
OSR
–80
–90
128
256
512
64
47
DIFFERENTIAL INPUT SIGNAL FREQUENCY (Hz)
49
51
53
N
) with Internal Oscillator
55
57
59
NOTCH (f
28.16kHz
14.08kHz
7.04kHz
3.52kHz
1.76kHz
880Hz
440Hz
220Hz
110Hz
55Hz
61
2440 F12
63
N
)
OSR, the noise performance of the device is 200nV
better than 80dB rejection of 50Hz ±2% and 60Hz ±2%.
Since the OSR is large (32,768) the wide band rejection
is extremely large and the antialiasing requirements are
simple. The fi rst multiple of f
1.8MHz, see Figure 13.
The fi rst NULL becomes f
(an output rate of 880Hz) and f
has shifted, the sample rate remains constant. As a result
of constant modulator sampling rate, the linearity, offset
and full-scale performance remains unchanged as does
the fi rst multiple of f
Figure 13. LTC2440 Normal Mode Rejection (Internal Oscillator)
–120
–140
–100
–20
–40
–60
–80
0
0
DIFFERENTIAL INPUT SIGNAL FREQUENCY (Hz)
S
.
REJECTION > 120dB
N
1000000
= 7.04kHz with an OSR of 256
S
O
occurs at 55Hz • 32,768 =
grounded. While the NULL
1.8MHz
1440 F13
2000000
RMS
with
2440fd