LTC2453 Datasheet, PDF (1/16 Pages) Linear Technology – Easy-to-Use, Ultra-Tiny, Differential, 16-Bit ADC With I2C Interface

FEATURES
■ _{±VCC Differential Input Range}
■ _{16-Bit Resolution (Including Sign), No Missing}
Codes
■ _{2LSB Offset Error}
■ _{4LSB Full-Scale Error}
■ _{60 Conversions Per Second}
■ _{Single Conversion Settling Time for Multiplexed}
Applications
■ _{Single-Cycle Operation with Auto Shutdown}
■ _{800μA Supply Current}
■ _{0.2μA Sleep Current}
■ _{Internal Oscillator—No External Components}
Required
■ _{2-Wire I}²_{C Interface}
■ _{Ultra-Tiny 3mm × 2mm DFN Package}
APPLICATIONS
■ _{System Monitoring}
■ _{Environmental Monitoring}
■ _{Direct Temperature Measurements}
■ _{Instrumentation}
■ _{Industrial Process Control}
■ _{Data Acquisition}
■ _{Embedded ADC Upgrades}
, LT, LTC and LTM 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
2.7V TO 5.5V
0.1μF
10μF
0.1μF
REF⁺ V_CC
IN⁺
SCL
10k
10k
IN^–
LTC2453
2-WIRE I²C
SDA INTERFACE
10k
R
0.1μF
REF^– GND
2453 TA01
LTC2453
Easy-to-Use, Ultra-Tiny,
Differential, 16-Bit ΔΣ ADC
With I²C Interface
DESCRIPTION
The LTC^®2453 is an ultra-tiny, fully differential, 16-bit,
analog-to-digital converter. The LTC2453 uses a single
2.7V to 5.5V supply and communicates through an I²C
interface. The ADC is available in an 8-pin, 3mm × 2mm
DFN package. It includes an integrated oscillator that does
not require any external components. It uses a delta-sigma
modulator as a converter core and has no latency for
multiplexed applications. The LTC2453 includes a pro-
prietary input sampling scheme that reduces the average
input sampling current several orders of magnitude lower
than conventional delta-sigma converters. Additionally,
due to its architecture, there is negligible current leakage
between the input pins.
The LTC2453 can sample at 60 conversions per second,
and due to the very large oversampling ratio, has ex-
tremely relaxed antialiasing requirements. The LTC2453
includes continuous internal offset and full-scale calibration
algorithms which are transparent to the user, ensuring
accuracy over time and over the operating temperature
range. The converter has external REF⁺ and REF^– pins
and the differential input voltage range can extend up to
±(V_REF+ – V_REF–).
Following a single conversion, the LTC2453 can auto-
matically enter a sleep mode and reduce its power to less
than 0.2μA. If the user reads the ADC once a second, the
LTC2453 consumes an average of less than 50μW from
a 2.7V supply.
Integral Nonlinearity, V_CC = 3V
2.0
1.5
VVV^{CRRCEEFF=+–}
3V
= 3V
= 0V
1.0
0.5
T_A = –45°C, 25°C, 90°C
0
–0.5
–1.0
–1.5
–2.0
–3
–2 –1 0
1
2
3
DIFFERENTIAL INPUT VOLTAGE (V)
2453 G02
2453f
1