LTC2410
24-Bit No Latency ∆Σ™ ADC
with Differential Input and
Differential Reference
FEATURES
DESCRIPTION
The LTC®2410 is a 2.7V to 5.5V micropower 24-bit dif-
ferential ∆Σ 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 LTC2410 can be configured for better than 110dB
input differential mode rejection at 50Hz or 60Hz 2ꢀ, or
it can be driven by an external oscillator for a user defined
rejection frequency. The internal oscillator requires no
external frequency setting components.
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Differential Input and Differential Reference with
GND to V Common Mode Range
CC
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2ppm INL, No Missing Codes
2.5ppm Full-Scale Error
0.1ppm Offset
0.16ppm Noise
Single Conversion Settling Time for Multiplexed
Applications
Internal Oscillator—No External Components
Required
110dB Min, 50Hz or 60Hz Notch Filter
24-Bit ADC in Narrow SSOP-16 Package
(SO-8 Footprint)
Single Supply 2.7V to 5.5V Operation
Low Supply Current (200µA) and Auto Shutdown
Fully Differential Version of LTC2400
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The converter accepts any external differential reference
voltage from 0.1V to V for flexible ratiometric and re-
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mote sensing measurementconfigurations. The full-scale
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differential input range is from –0.5V
to 0.5V . The
REFCM
, may be independently set
REF
REF
reference common mode voltage, V
, and the input
common mode voltage, V
INCM
anywherewithintheGNDtoV rangeoftheLTC2410.The
CC
APPLICATIONS
DC common mode input rejection is better than 140dB.
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The LTC2410 communicates through a flexible 3-wire
digital interface which is compatible with SPI and MI-
CROWIRE protocols.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and No
Latency ∆Σ is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Direct Sensor Digitizer
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Weight Scales
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Direct Temperature Measurement
Gas Analyzers
Strain-Gauge Transducers
Instrumentation
Data Acquisition
Industrial Process Control
6-Digit DVMs
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TYPICAL APPLICATION
2.7V TO 5.5V
V
CC
1µF
V
CC
1µF
= INTERNAL OSC/50Hz REJECTION
2
14
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION
V
F
O
CC
LTC2410
2
3
+
REF
V
12 SDO
13 SCK
11 CS
CC
3
4
+
BRIDGE
IMPEDANCE
100Ω TO 10k
13
REFERENCE
VOLTAGE
REF
REF
5
+
SCK
IN
IN
3-WIRE
SPI INTERFACE
–
LTC2410
GND
6
–
0.1V TO V
CC
3-WIRE
SPI INTERFACE
5
6
12
11
–
4
+
ANALOG INPUT RANGE
REF
IN
SDO
F
O
–0.5V
TO 0.5V
REF
REF
–
1, 7, 8
14
IN
CS
1, 7, 8, 9, 10, 15, 16
9, 10,
GND
15, 16
2410 TA01
2410 TA02
2410fa
1
For more information www.linear.com/LTC2410