DEMO MANUAL DC2071A
LTC2374/LTC2373/LTC2372
16-Bit/18-Bit, 1.6Msps/1Msps/500ksps
8-Channel, SAR ADCs
DESCRIPTION
Demonstrationcircuit2071AfeaturestheLTC®2373family.
TheLTC2374/LTC2373/LTC2372arelownoise,highspeed,
8-channel, 16-/18-bit successive approximation register
(SAR) ADCs. The following text refers to the LTC2373-18
but applies to all parts in the family, the only differences
being the number of bits and the maximum sample rate.
Operating from a single 5V supply, the LTC2373-18 has a
highly configurable, low crosstalk, 8-channel input multi-
plexer,supportingfullydifferential,pseudo-differentialuni-
polar and pseudo-differential bipolar analog input ranges.
performance such as peak-to-peak noise and DC linearity.
Use the DC890 if precise sampling rates are required or to
demonstrate AC performance such as SNR, THD, SINAD
and SFDR. The demonstration circuit 2071 is intended to
demonstraterecommendedgrounding,componentplace-
ment and selection, routing and bypassing for this ADC.
Several suggested driver circuits for the analog inputs
will be presented.
Design files for this circuit board, including the
schematic and BOM, are available at
http://www.linear.com/demo/DC2071A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
QuikEval and PScope are trademarks of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
The DC2071 demonstrates the DC and AC performance of
theLTC2373-18inconjunctionwiththeDC590andDC890
data collection boards. Use the DC590 to demonstrate DC
ASSEMBLY OPTIONS
Table 1. DC2071A Assembly Options
Assembly Version
DC2071A-A
DC2071A-B
DC2071A-C
DC2071A-D
DC2071A-E
U1 Part Number
LTC2373CUH-18
LTC2372CUH-18
LTC2374CUH-16
LTC2373CUH-16
LTC2372CUH-16
Max Conversion Rate
1Msps
Number of Bits
Max CLK IN Frequency
62MHz
18
18
16
16
16
0.5Msps
31MHz
1.6Msps
86.4MHz
1Msps
50MHz
0.5Msps
25MHz
dc2071afc
1