LTC1408 LINER [Linear Technology], LTC1408 Datasheet - Page 7

• Manufacturer Part Number: LTC1408
• Description: Channel, 14-Bit, 600ksps Simultaneous Sampling ADC with Shutdown
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFOR A CE CHARACTERISTICS
PI FU CTIO S
SDO (Pin 1): Three-State Serial Data Output. Each set of
six output data words represent the six analog input
channels at the start of the previous conversion. Data for
CH0 comes out first and data for CH5 comes out last. Each
data word comes out MSB first.
OGND (Pin 2): Ground Return for SDO Currents. This pad
must always be within 300mV of the ground plane poten-
tial.
OV
be no more than 300mV higher than V
brought to a lower voltage to interface to low voltage logic
families. The unloaded high state at SDO is at the potential
of OV
CH0
fully differentially with respect to CH0
or ±1.25V differential swing and a 0V to V
input range.
CH0
differentially with respect to CH0
or ±1.25V differential swing and a 0V to V
input range.
DD
U
+
–
DD
(Pin 3): Power Supply for the SDO Pin. OV
(Pin 4): Non-Inverting Channel 0. CH0
(Pin 5): Inverting Channel 0. CH0
.
U
16384
14336
12288
10240
8192
4096
6144
2048
0
–5
Simultaneous Step at all 6 Channels
from 25Ω Source Sampling
Frequency = 625ksps
Input Frequency = 625.0381MHz
U
0
5
TIME (ns)
W
10
CH0 THRU CH5
CH0 THRU CH5
U
+
FALLING
15
RISING
with a –2.5V to 0V,
–
with a 0V to 2.5V,
20
–
DD
1408 G22
operates fully
25
DD
DD
and can be
+
operates
absolute
absolute
DD
must
GND (Pins 6, 9, 12, 13, 16, 19): Analog Grounds. These
ground pins must be tied directly to the solid ground plane
under the part. Analog signal currents flow through these
connections.
CH1
fully differentially with respect to CH1
or ±1.25V differential swing and a 0V to V
input range.
CH1
differentially with respect to CH1
or ±1.25V differential swing and a 0V to V
input range.
CH2
fully differentially with respect to CH2
or ±1.25V differential swing and a 0V to V
input range.
CH2
differentially with respect to CH2
±1.25V differential swing and a 0V to V
input range.
+
–
+
–
(Pin 10): Non-Inverting Channel 2. CH2
(Pin 11): Inverting Channel 2. CH2
(Pin 7): Non-Inverting Channel 1. CH1
(Pin 8): Inverting Channel 1. CH1
–120
–100
–20
–40
–60
–80
V
0
DD
100
PSRR vs Frequency
= 3V, T
1k
10k 100k
A
= 25°C
FREQUENCY (Hz)
1M
10M 100M 1G
+
+
with a –2.5V to 0V, or
with a –2.5V to 0V,
–
–
with a 0V to 2.5V,
with a 0V to 2.5V,
1408 G23
–
LTC1408
–
operates fully
operates fully
DD
DD
DD
DD
+
+
operates
operates
absolute
absolute
absolute
absolute
1408fa
7