LTC2351HUH-12#PBF Linear Technology, LTC2351HUH-12#PBF Datasheet - Page 8

• Manufacturer Part Number: LTC2351HUH-12#PBF
• Description: IC ADC 12BIT 1.5MSPS 32-QFN
• Manufacturer: Linear Technology

Specifications of LTC2351HUH-12#PBF

• Number Of Bits: 12
• Sampling Rate (per Second): 1.5M
• Data Interface: Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 16.5mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-WFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN FUNCTIONS
LTC2351-12
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 fi rst and data for CH5 comes out last. Each
data word comes out MSB fi rst.
OGND (Pin 2): Ground Return for SDO Currents. Connect
to the solid ground plane.
OV
must be no more than 300mV higher than V
be 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 fl ow 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
or ±1.25V differential swing and a 0V to V
input range.
8
DD
+
–
+
–
+
–
(Pin 10): Non-Inverting Channel 2. CH2
(Pin 11): Inverting Channel 2. CH2
(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
(Pin 3): Power Supply for the SDO Pin. OV
DD
.
+
+
+
with a –2.5V to 0V,
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,
–
–
–
operates fully
operates fully
operates fully
DD
DD
DD
DD
DD
DD
DD
+
+
+
operates
operates
operates
absolute
absolute
absolute
absolute
absolute
absolute
and can
DD
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
or ±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
input 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
input 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 fl ow through this
connection. The 10μF reference bypass capacitor should
be returned to this pad.
V
a solid analog ground plane with a 10μF ceramic capaci-
tor (or 10μF tantalum in parallel with 0.1μF ceramic). Can
be overdriven by an external reference voltage between
2.55V and V
V
plies 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 sup-
(Pin 23): 2.5V Internal Reference. Bypass to GND and
(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,
–
–
–
with a 0V to 2.5V,
with a 0V to 2.5V,
DD
with a 0V to 2.5V,
DD
–
–
–
absolute input
absolute input
operates fully
operates fully
operates fully
DD
DD
DD
DD
+
+
+
operates
operates
operates
absolute
absolute
absolute
absolute
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