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LTC2356-12 Datasheet(PDF) 1 Page - Linear Technology

Part # LTC2356-12
Description  Serial 12-Bit/14-Bit, 3.5Msps Sampling ADCs with Shutdown
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2356-12 Datasheet(HTML) 1 Page - Linear Technology

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1
LTC2356-12/LTC2356-14
2356f
The LTC
®2356-12/LTC2356-14 are 12-bit/14-bit, 3.5Msps
serial ADCs with differential inputs. The devices draw
only 5.5mA from a single 3.3V supply and come in a tiny
10-lead MSOP package. A Sleep shutdown feature further
reduces power consumption to 13
µW. The combination of
speed, low power and tiny package makes the LTC2356-12/
LTC2356-14 suitable for high speed, portable applications.
The 80dB common mode rejection allows users to elimi-
nate ground loops and common mode noise by measuring
signals differentially from the source.
The devices convert –1.25V to 1.25V bipolar inputs differ-
entially. The absolute voltage swing for AIN+ and
AIN– extends from ground to the supply voltage.
The serial interface sends out the conversion results during
the 16 clock cycles following a CONV rising edge for
compatibility with standard serial interfaces. If two addi-
tional clock cycles for acquisition time are allowed after the
data stream in between conversions, the full sampling rate
of 3.5Msps can be achieved with a 63MHz clock.
APPLICATIO S
FEATURES
DESCRIPTIO
BLOCK DIAGRA
Serial 12-Bit/14-Bit, 3.5Msps
Sampling ADCs with Shutdown
3.5Msps Conversion Rate
74.1dB SINAD at 14-Bits, 71.1dB SINAD at 12-Bits
Low Power Dissipation: 18mW
3.3V Single Supply Operation
2.5V Internal Bandgap Reference can be Overdriven
3-Wire SPI-Compatible Serial Interface
Sleep (13
µW) Shutdown Mode
Nap (4mW) Shutdown Mode
80dB Common Mode Rejection
±1.25V Bipolar Input Range
Tiny 10-Lead MSOP Package
Communications
Data Acquisition Systems
Uninterrupted Power Supplies
Multiphase Motor Control
Multiplexed Data Acquisition
RFID
THD, 2nd and 3rd vs Input Frequency
for Differential Input Signals
FREQUENCY (MHz)
0.1
–80
–74
–68
–62
–56
1
10
100
2356 G02
–86
–92
–98
–104
–50
THD
2nd
3rd
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
2356 BD
+
1
2
7
3
4
S & H
GND
EXPOSED PAD
LTC2356-14
VREF
10
µF
AIN
AIN
+
14-BIT ADC
3.3V
10
µF
14
8
10
9
THREE-
STATE
SERIAL
OUTPUT
PORT
2.5V
REFERENCE
TIMING
LOGIC
VDD
SDO
CONV
SCK
5
6
11


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