LTC2366 Linear Technology, LTC2366 Datasheet - Page 20

• Manufacturer Part Number: LTC2366
• Description: (LTC2365 / LTC2366) 12-Bit Serial Sampling ADCs
• Manufacturer: Linear Technology

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LTC2365/LTC2366
APPLICATIONS INFORMATION
Reference Input
On the TS8 package of the LTC2365/LTC2366, the voltage
on the V
reference voltage can range from V
Input Range
The analog input of the LTC2365/LTC2366 is driven single-
ended with respect to GND from a single supply. The input
may swing up to V
the TS8 package. The 0V to 2.5V range is also ideally
suited for single-ended input use with V
for single supply applications. If the difference between
the A
V
at all ones, and if this difference goes below 0V, the output
code will stay fi xed at all zeros.
20
REF
IN
for the TS8 package, the output code will stay fi xed
input and GND exceeds V
REF
pin defi nes the full-scale range of the ADC. The
DD
for the S6 package and to V
DD
DD
for the S6 package or
Figure 19. LTC2365/LTC2366 Transfer Characteristics
111...111
111...110
000...001
000...000
down to 1.4V.
DD
or V
0
1LSB
REF
REF
= 2.5V
INPUT VOLTAGE (V)
for
Figure 19 shows the ideal input/output characteristics for
the LTC2365/LTC2366. The code transitions occur mid-
way between successive integer LSB values (i.e. 0.5LSB,
1.5LSB, 2.5LSB, …, FS –1.5LSB). The output code is
straight binary with 1LSB = V
and 1LSB = V
BOARD LAYOUT AND BYPASSING
Wire wrap boards are not recommended for high resolu-
tion and/or high speed A/D converters. To obtain the best
performance from the LTC2365/LTC2366, a printed circuit
board with ground plane is required. Layout for the printed
circuit board should ensure that digital and analog signal
lines are separated as much as possible. In particular, care
should be taken not to run any digital track alongside an
analog signal track or underneath the ADC. The analog
input should be screened by the ground plane.
FS – 1LSB
23656 F19
REF
/4096 for the TS8 package.
DD
/4096 for the S6 package
23656f