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Linear Technology Electronic Components Datasheet

LTC2356IMSE-14 Datasheet

3.5Msps Sampling ADCs

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LTC2356-12/LTC2356-14
Serial 12-Bit/14-Bit, 3.5Msps
Sampling ADCs with Shutdown
Features
n 3.5Msps Conversion Rate
n 74.1dB SINAD at 14-Bits, 71.1dB SINAD at 12-Bits
n Low Power Dissipation: 18mW
n 3.3V Single Supply Operation
n 2.5V Internal Bandgap Reference can be Overdriven
n 3-Wire SPI-Compatible Serial Interface
n Sleep (13µW) Shutdown Mode
n Nap (4mW) Shutdown Mode
n 80dB Common Mode Rejection
n ±1.25V Bipolar Input Range
n Tiny 10-Lead MSOP Package
Applications
n Communications
n Data Acquisition Systems
n Uninterrupted Power Supplies
n Multiphase Motor Control
n Multiplexed Data Acquisition
n RFID
Description
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 13µW. The com-
bination 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 eliminate
ground loops and common mode noise by measuring
signals differentially from the source.
The devices convert –1.25V to 1.25V bipolar inputs
differentially. 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 com-
patibility with standard serial interfaces. If two additional
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.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Block Diagram
10µF 3.3V
AIN+
AIN–
10µF
LTC2356-14
7 VDD
1+
S&H
2
14-BIT ADC
14
3 VREF
GND
4
2.5V
REFERENCE
5
6
11
EXPOSED PAD
THREE-
STATE
SERIAL
OUTPUT
PORT
8 SDO
TIMING
LOGIC
10 CONV
9 SCK
2356 BD
THD, 2nd and 3rd vs Input Frequency
for Differential Input Signals
–50
–56
–62
–68
THD
2nd
–74
3rd
–80
–86
–92
–98
–104
0.1
1
10
FREQUENCY (MHz)
100
2356 G02
For more information www.linear.com/LTC2356-12
2356fd
1


Linear Technology Electronic Components Datasheet

LTC2356IMSE-14 Datasheet

3.5Msps Sampling ADCs

No Preview Available !

LTC2356-12/LTC2356-14
Absolute Maximum Ratings
(Notes 1, 2)
Supply Voltage (VDD)...................................................4V
Analog and VREF Input Voltages
(Note 3).....................................–0.3V to (VDD + 0.3V)
Digital Input Voltages.................... – 0.3V to (VDD + 0.3V)
Digital Output Voltage....................– 0.3V to (VDD + 0.3V)
Power Dissipation................................................100mW
Operation Temperature Range
LTC2356C-12/LTC2356C-14...................... 0°C to 70°C
LTC2356I-12/LTC2356I-14....................– 40°C to 85°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................... 300°C
Pin Configuration
AAIINN+–
1
2
VREF 3
GND 4
GND 5
TOP VIEW
11
10 CONV
9 SCK
8 SDO
7 VDD
6 GND
MSE PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 40°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
Order Information http://www.linear.com/product/LTC2356-12#orderinfo
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2356CMSE-12#PBF LTC2356CMSE-12#TRPBF LTCWN
10-Lead Plastic MSOP
0°C to 70°C
LTC2356IMSE-12#PBF LTC2356IMSE-12#TRPBF LTCWN
10-Lead Plastic MSOP
–40°C to 85°C
LTC2356CMSE-14#PBF LTC2356CMSE-14#TRPBF LTCVF
10-Lead Plastic MSOP
0°C to 70°C
LTC2356IMSE-14#PBF LTC2356IMSE-14#TRPBF LTCVF
10-Lead Plastic MSOP
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
Converter Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. With internal reference. VDD = 3.3V.
LTC2356-12
LTC2356-14
PARAMETER
CONDITIONS
MIN TYP MAX MIN TYP MAX UNITS
Resolution (No Missing Codes)
l 12
14
Bits
Integral Linearity Error
(Notes 4, 5, 18)
l –2 ±0.25 2
–4 ±0.5 4
LSB
Offset Error
(Notes 4, 18)
l –10 ±1 10 –30 ±2 30
LSB
Gain Error
(Note 4, 18)
l –40 ±5 40 –80 ±10 80
LSB
Gain Tempco
Internal Reference (Note 4)
External Reference
±15
±15
ppm/°C
±1
±1
ppm/°C
2356fd
2
For more information www.linear.com/LTC2356-12


Part Number LTC2356IMSE-14
Description 3.5Msps Sampling ADCs
Maker Linear Technology
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