LTC2461/LTC2463
2
Ultra-Tiny, 16-Bit I C ΔΣ
ADCs with 10ppm/°C Max
Precision Reference
FEATURES
DESCRIPTION
The LTC®2461/LTC2463 are ultra tiny, 16-Bit analog-to-
digital converters with an integrated precision reference.
They use a single 2.7V to 5.5V supply and communicate
through an I2C Interface. The LTC2461 is single-ended
with a 0V to 1.25V input range and the LTC2463 is dif-
ferential with a 1.25V input range. Both ADCs include a
1.25V integrated reference with 2ppm/°C drift perfor-
mance and 0.1% initial accuracy. The converters are
available in a 12-pin 3mm × 3mm DFN package or an
MSOP-12 package. They include an integrated oscillator
and perform conversions with no latency for multiplexed
applications. TheLTC2461/LTC2463includeaproprietary
input sampling scheme that reduces the average input
current several orders of magnitude when compared to
conventional delta sigma converters.
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16-Bit Resolution, No Missing Codes
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Internal Reference, High Accuracy 10ppm/°C (Max)
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Single-Ended (LTC2461) or Differential (LTC2463)
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2LSB Offset Error (Typ)
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0.01% Gain Error (Typ)
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60 Conversions Per Second
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Single Conversion Settling Time for Multiplexed
Applications
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1.5mA Supply Current
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200nA Sleep Current
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Internal Oscillator—No External Components
Required
2
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2-Wire I C Interface with Two Addresses Plus One
Global Address for Synchronization
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Ultra-Tiny, 12-Lead, 3mm × 3mm DFN and MSOP
Packages
Following a single conversion, the LTC2461/LTC2463
automatically power down the converter and can also be
configured to power down the reference. When both the
ADC and reference are powered down, the supply current
is reduced to 200nA.
APPLICATIONS
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System Monitoring
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Environmental Monitoring
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Direct Temperature Measurements
The LTC2461/LTC2463 can sample at 60 conversions per
second and, due to the very large oversampling ratio,
have extremely relaxed antialiasing requirements. Both
includecontinuousinternaloffsetandfullscalecalibration
algorithmswhicharetransparenttotheuser, ensuringac-
curacy over time and the operating temperature range.
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Instrumentation
Data Acquisition
Embedded ADC Upgrades
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L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6208279, 6411242, 7088280, 7164378.
TYPICAL APPLICATION
VREF vs Temperature
1.2520
2.7V TO 5.5V
1.2515
1.2510
1.2505
1.2500
1.2495
1.2490
1.2485
1.2480
0.1μF
0.1μF
COMP
0.1μF
10μF
0.1μF
10k
REFOUT
V
CC
SCL
SDA
GND
+
–
IN
2
10k
10k
I C
INTERFACE
LTC2463
A0
IN
0.1μF
–
REF
R
24613 TA01a
–50 –30 –10 10
30
50
70
90
TEMPERATURE (°C)
24613 TA01b
24613f
1