Linear Technology LTC2449 8-/16-channel, High Speed 24-Bit Delta Sigma ADC DC742A DC742A Ficha De Dados

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DEMO MANUAL DC742A

LTC2449 

8-/16-channel, High Speed 

24-Bit Delta Sigma ADC

The LTC

®

2449 is an 8-/16-channel, high speed, 24-bit Δ∑ 

ADC with ten selectable speed/resolution modes from 
6.9Hz/200nV

RMS

 to 3.5kHz/25μV

RMS

 (4kHz with external 

oscillator). Key DC specifications include 5ppm INL, 5μV 
offset, 10ppm full-scale error and 20nV/°C offset drift. In 
the 6.9Hz/200nV

RMS

 mode, input normal mode rejection 

of 50Hz and 60Hz noise is better than 87dB. The accuracy 
(offset, full-scale, linearity, drift) and power dissipation are 
independent of the speed selected. The LTC2449 performs 
auto-zeroing of the ADC by reversing the inputs through 
the multiplexer output/ADC input connections. This allows 
an external dual buffer amplifier to isolate the signal inputs 
from the sampling current of the ADC.

L, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks 
and QuikEval and C-Load are trademarks of Linear Technology Corporation. All other trademarks 
are the property of their respective owners.

DC742A is a member of Linear Technology’s QuikEval™ 
family of demonstration boards. It is designed to allow easy 
evaluation of the LTC2449 and may be connected directly 
to the target application’s analog signals while using the 
DC590 USB Serial Controller board and supplied software 
to measure performance. The exposed ground planes allow 
proper grounding to prototype circuitry. After evaluating 
with LTC’s software, the digital signals can be connected 
to the application’s processor/controller for development 
of the serial interface.