LTC2410
24-Bit No Latency ∆ΣTM ADC
with Differential Input and
Differential Reference
U
DESCRIPTIO
FEATURES
The LTC®2410 is a 2.7V to 5.5V micropower 24-bit
differential ∆Σ analog to digital converter with an inte-
grated 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
±2%, oritcanbedrivenbyanexternaloscillatorforauser
defined rejection frequency. The internal oscillator re-
quires no external frequency setting components.
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Differential Input and Differential Reference with
GND to VCC Common Mode Range
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2ppm INL, No Missing Codes
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2.5ppm Full-Scale Error
0.1ppm Offset
0.16ppm Noise
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■
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Single Conversion Settling Time for Multiplexed
Applications
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Internal Oscillator—No External Components
Required
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110dB Min, 50Hz or 60Hz Notch Filter
The converter accepts any external differential reference
voltage from 0.1V to VCC for flexible ratiometric and
remote sensing measurement configurations. The full-
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24-Bit ADC in Narrow SSOP-16 Package
(SO-8 Footprint)
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Single Supply 2.7V to 5.5V Operation
scale differential input range is from –0.5VREF to 0.5VREF
.
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Low Supply Current (200µA) and Auto Shutdown
The reference common mode voltage, VREFCM, and the
input common mode voltage, VINCM, may be indepen-
dently set anywhere within the GND to VCC range of the
LTC2410. The DC common mode input rejection is better
than 140dB.
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Fully DifferentialUVersion of LTC2400
APPLICATIO S
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Direct Sensor Digitizer
Weight Scales
Direct Temperature Measurement
Gas Analyzers
Strain-Gage Transducers
Instrumentation
Data Acquisition
Industrial Process Control
6-Digit DVMs
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The LTC2410 communicates through a flexible 3-wire
digital interface which is compatible with SPI and
MICROWIRETM protocols.
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, LTC and LT are registered trademarks of Linear Technology Corporation.
No Latency ∆Σ is a trademark of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
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TYPICAL APPLICATIO S
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
2
3
LTC2410
+
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
CS
F
O
–0.5V
TO 0.5V
REF
REF
–
1, 7, 8
14
IN
1, 7, 8, 9, 10, 15, 16
9, 10,
GND
15, 16
2410 TA01
2410 TA02
1