LTC2460_15 Datasheet, PDF (1/22 Pages) Linear Technology – Ultra-Tiny, 16-Bit ADCs with 10ppm/C Max Precision Reference

Features
n _{16-Bit Resolution, No Missing Codes}
n _{Internal Reference, High Accuracy 10ppm/°C (Max)}
n _{Single-Ended (LTC2460) or Differential (LTC2462)}
n _{2LSB Offset Error}
n _{0.01% Gain Error}
n _{60 Conversions Per Second}
n _{Single Conversion Settling Time for Multiplexed}
Applications
n _{Single-Cycle Operation with Auto Shutdown}
n _{1.5mA Supply Current}
n _{2µA (Max) Sleep Current}
n _{Internal Oscillator—No External Components Required}
n _{SPI Interface}
n _{Ultra-Tiny 12-Lead 3mm × 3mm DFN and MSOP}
Packages
Applications
n _{System Monitoring}
n _{Environmental Monitoring}
n _{Direct Temperature Measurements}
n _{Instrumentation}
n _{Industrial Process Control}
n _{Data Acquisition}
n _{Embedded ADC Upgrades}
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
No Latency ∆∑ is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents including 6208279, 6411242,
7088280, 7164378.
LTC2460/LTC2462
Ultra-Tiny, 16-Bit ΔΣ ADCs
with 10ppm/°C Max
Precision Reference
Description
The LTC^®2460/LTC2462 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 SPI Interface. The LTC2460 is single-ended
with a 0V to V_REF input range and the LTC2462 is dif-
ferential with a ±V_REF input range. Both ADC’s include
a 1.25V integrated reference with 2ppm/°C drift per-
formance and 0.1% initial accuracy. The converters are
available in a 12-pin DFN 3mm × 3mm package or an
MSOP-12 package. They include an integrated oscillator
and perform conversions with no latency for multiplexed
applications. The LTC2460/LTC2462 include a proprietary
input sampling scheme that reduces the average input
current several orders of magnitude when compared to
conventional delta sigma converters.
Following a single conversion, the LTC2460/LTC2462
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.
The LTC2460/LTC2462 can sample at 60 conversions per
second, and due to the very large oversampling ratio,
have extremely relaxed antialiasing requirements. Both
include continuous internal offset and fullscale calibration
algorithms which are transparent to the user, ensuring
accuracy over time and the operating temperature range.
Typical Application
2.7V TO 5.5V
0.1µF
0.1µF
0.1µF
10µF
0.1µF
REFOUT
COMP V_CC
10k
10k
IN⁺
SCK
IN^–
LTC2462
SDO
CS
SPI
INTERFACE
10k
R
0.1µF
REF^–
GND
24602 TA01a
V_REF vs Temperature
1.2520
1.2515
1.2510
1.2505
1.2500
1.2495
1.2490
1.2485
1.2480
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
24602 TA01b
24602fa
1