LTC2351-12 LINER [Linear Technology], LTC2351-12 Datasheet - Page 7

• Manufacturer Part Number: LTC2351-12
• Description: 6 Channel, 12-Bit, 1.5Msps Simultaneous Sampling ADC with Shutdown
• Manufacturer: LINER [Linear Technology]

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. Connect
to the solid ground plane.
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.
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.
DD
U
+
–
+
–
+
–
DD
(Pin 10): Non-Inverting Channel 2. CH2
(Pin 11): Inverting Channel 2. CH2
(Pin 3): Power Supply for the SDO Pin. OV
(Pin 4): Non-Inverting Channel 0. CH0
(Pin 5): Inverting Channel 0. CH0
(Pin 7): Non-Inverting Channel 1. CH1
(Pin 8): Inverting Channel 1. CH1
.
U
U
+
+
+
with a –2.5V to 0V, or
with a –2.5V to 0V,
with a –2.5V to 0V,
–
–
–
with a 0V to 2.5V,
with a 0V to 2.5V,
with a 0V to 2.5V,
–
–
DD
–
operates fully
operates fully
operates fully
DD
DD
DD
DD
DD
DD
and can be
+
+
+
operates
operates
operates
absolute
absolute
absolute
absolute
absolute
absolute
DD
must
CH3
fully differentially with respect to CH3
or ±1.25V differential swing and a 0V to V
input range.
CH3
differentially with respect to CH3
±1.25V differential swing and a 0V to V
input range.
CH4
fully differentially with respect to CH4
or ±1.25V differential swing and a 0V to V
range.
CH4
differentially with respect to CH4
±1.25V differential swing and a 0V to V
range.
CH5
fully differentially with respect to CH5
or ±1.25V differential swing and a 0V to V
range.
CH5
differentially with respect to CH5
±1.25V differential swing and a 0V to V
range.
GND (PIN 22): Analog Ground for Reference. Analog
ground must be tied directly to the solid ground plane
under the part. Analog signal currents flow through this
connection. The 10µF reference bypass capacitor should
be returned to this pad.
V
and a solid analog ground plane with a 10µF ceramic
capacitor (or 10µF tantalum in parallel with 0.1µF ce-
ramic). Can be overdriven by an external reference voltage
between 2.55V and V
V
3V to the analog section. Bypass to the solid analog
ground plane with a 10µF ceramic capacitor (or 10µF
tantalum) in parallel with 0.1µF ceramic. Care should be
taken to place the 0.1µF bypass capacitor as close to
Pin 24 as possible. Pin 24 must be tied to Pin 25.
REF
CC
(Pin 24): 3V Positive Analog Supply. This pin supplies
+
–
+
–
+
–
(Pin 23): 2.5V Internal Reference. Bypass to GND
(Pin 14): Non-Inverting Channel 3. CH3
(Pin 15): Inverting Channel 3. CH3
(Pin 17): Non-Inverting Channel 4. CH4
(Pin 18): Inverting Channel 4. CH4
(Pin 20): Non-Inverting Channel 5. CH5
(Pin 21): Inverting Channel 5. CH5
DD
, V
CC
.
+
+
+
with a –2.5V to 0V, or
with a –2.5V to 0V, or
with a –2.5V to 0V, or
LTC2351-12
–
–
–
with a 0V to 2.5V,
with a 0V to 2.5V,
with a 0V to 2.5V,
DD
DD
DD
DD
–
–
–
absolute input
absolute input
absolute input
absolute input
operates fully
operates fully
operates fully
DD
DD
+
+
+
operates
absolute
absolute
operates
operates
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