
LTC2301/LTC2305
21
23015fb
separated as much as possible. Care should be taken not
to run any digital signals alongside an analog signal. All
analog inputs should be shielded by GND. VREF, REFCOMP
and VDD should be bypassed to the ground plane as close
to the pin as possible. Maintaining a low impedance path
APPLICATIONS INFORMATION
Figure 15a. Top Silkscreen
for the common return of these bypass capacitors is es-
sential to the low noise operation of the ADC. These traces
should be as wide as possible. See Figures 15a–15e for
a suggested layout.
Figure 13. Bipolar Transfer Characteristics (2’s Complement)
Figure 14. Unipolar Transfer Characteristics (Straight Binary)
INPUT VOLTAGE (V)
0V
OUTPUT
CODE
(TWO’S
COMPLEMENT)
–1
LSB
23015 F13
011...111
011...110
000...001
000...000
100...000
100...001
111...110
1
LSB
BIPOLAR
ZERO
111...111
FS/2 – 1LSB
–FS/2
FS = 4.096V
1LSB = FS/2n
1LSB = 1mV
INPUT VOLTAGE (V)
OUTPUT
CODE
23015 F14
111...111
111...110
100...001
100...000
000...000
000...001
011...110
011...111
FS – 1LSB
0V
UNIPOLAR
ZERO
FS = 4.096V
1LSB = FS/2n
1LSB = 1mV