LTAEY LINEAR [Linear Integrated Systems], LTAEY Datasheet - Page 11

• Manufacturer Part Number: LTAEY
• Description: Differential Input 16-Bit No Latency DS ADC
• Manufacturer: LINEAR [Linear Integrated Systems]

APPLICATIO S I FOR ATIO
Simultaneous Frequency Rejection
The LTC2433-1 internal oscillator provides better than
87dB normal mode rejection over the range of 49Hz to
61.2Hz as shown in Figure 4. For this simultaneous 50Hz/
60Hz rejection, F
When a fundamental rejection frequency different from
the range 49Hz to 61.2Hz is required or when the converter
must be sychronized with an outside source, the LTC2433-1
can operate with an external conversion clock. The conveter
automatically detects the presence of an external clock
signal at the F
frequency f
Table 2. LTC2433-1 Output Data Format
Differential Input Voltage
V
V
0.5 • V
0.25 • V
0.25 • V
0
–1LSB
– 0.25 • V
– 0.25 • V
– 0.5 • V
V
*The differential input voltage V
**The differential reference voltage V
IN
IN
IN
Figure 4. LTC2433-1 Normal Mode
Rejection When Using an Internal Oscillator
–100
–100
–120
–130
–140
*
* 0.5 • V
* < –0.5 • V
–80
–90
EOSC
REF
48
O
DIFFERENTIAL INPUT SIGNAL FREQUENCY (Hz)
REF
REF
REF
pin and turns off the internal oscillator. The
REF
REF
** – 1LSB
**
** – 1LSB
**
O
50
of the external signal must be at least
**
** – 1LSB
REF
should be connected to GND.
REF
U
**
52
**
54
U
56
IN
= IN
58
W
Bit 18
EOC
REF
0
0
0
0
0
0
0
0
0
0
+
60
– IN
= REF
24361 F04
–
62
.
Bit 17
+
DMY
– REF
0
0
0
0
0
0
0
0
0
0
U
–
.
Bit 16
SIG
1
1
1
1
1
0
0
0
0
0
Bit 15
MSB
2560Hz to be detected. The external clock signal duty cycle
is not significant as long as the minimum and maximum
specifications for the high and low periods, t
are observed.
While operating with an external conversion clock of a
frequency f
normal mode rejection in a frequency range f
frequency deviation from f
Whenever an external clock is not present at the F
converter automatically activates its internal oscillator and
enters the Internal Conversion Clock mode. The LTC2433-1
1
0
0
0
0
1
1
1
1
0
4%. The normal mode rejection as a function of the input
Figure 5. LTC2433-1 Normal Mode Rejection When
Using an External Oscillator of Frequency f
Bit 14
0
1
1
0
0
1
1
0
0
1
–100
–105
–110
–115
–120
–125
–130
–135
–140
–80
–85
–90
–95
EOSC
DEVIATION FROM NOTCH FREQUENCY f
–12
DIFFERENTIAL INPUT SIGNAL FREQUENCY
, the LTC2433-1 provides better than 110dB
Bit 13
0
1
0
1
0
1
0
1
0
1
–8
–4
Bit 12
0
1
0
1
0
1
0
1
0
1
EOSC
0
/2560 is shown in Figure 5.
4
…
…
…
…
…
…
…
…
…
…
…
LTC2433-1
EOSC
8
24361 F05
/2560(%)
Bit 0
EOSC
0
1
0
1
0
1
0
1
0
1
12
HEO
EOSC
and t
O
11
pin the
/2560
24331fa
LEO
,