No Latency: Digital Filter Settles in a Single Cycle.
鈭單?/div>
analog to
digital converter with an integrated oscillator, 2ppm INL
and 0.16ppm RMS noise. It uses delta-sigma technology
and provides single cycle settling time for multiplexed
applications. Through a single pin, the LTC2413 can be
configured for better than 87dB input differential mode
rejection over the range of 49Hz to 61.2Hz (50Hz and
60Hz
鹵2%
simultaneously), or it can be driven by an
external oscillator for a user defined rejection frequency.
The internal oscillator requires no external frequency
setting components.
The converter accepts any external differential reference
voltage from 0.1V to V
CC
for flexible ratiometric and
remote sensing measurement configurations. The full-
scale differential input range is from 鈥?0.5V
REF
to 0.5V
REF
.
The reference common mode voltage, V
REFCM
, and the
input common mode voltage, V
INCM
, may be indepen-
dently set anywhere within the GND to V
CC
range of the
LTC2413. The DC common mode input rejection is better
than 140dB.
The LTC2413 communicates through a flexible 3-wire
digital interface which is compatible with SPI and
MICROWIRE
TM
protocols.
, LTC and LT are registered trademarks of Linear Technology Corporation.
No Latency
鈭單?/div>
is a trademark of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
APPLICATIO S
s
s
s
s
s
s
s
s
s
s
Direct Sensor Digitizer
Weight Scales
Direct Temperature Measurement
Gas Analyzers
Strain-Gauge Transducers
Instrumentation
Data Acquisition
Industrial Process Control
6-Digit DVMs
Products for International Markets
TYPICAL APPLICATIO
2.7V TO 5.5V
1碌F
2
V
CC
LTC2413
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG INPUT RANGE
鈥?.5V
REF
TO 0.5V
REF
3
4
5
6
REF
+
Measured Noise Rejection from 48Hz to 62.5Hz
鈥?0
鈥?5
MEASURED DATA
CALCULATED DATA
V
CC
= 5V
REF
+
= 5V
REF
鈥?/div>
= GND
V
INCM
= 2.5V
V
IN(P-P)
= 5V
T
A
= 25擄C
NORMAL MODE REECTION (dB)
鈥?0
鈥?5
鈥?00
鈥?05
鈥?10
鈥?15
鈥?20
48
50
F
O
14
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/
SIMULTANEOUS 50Hz/60Hz REJECTION
SCK
13
3-WIRE
SPI INTERFACE
REF
鈥?/div>
IN
+
IN
鈥?/div>
GND
SDO
CS
12
11
1, 7, 8, 9, 10, 15, 16
2413 TA01
U
52
54
56
58
60
INPUT FREQUENCY (Hz)
62
2413 TA02
U
U
sn2413 2413fs
1
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