LTC2356CMSE-14 Linear Technology Corporation, LTC2356CMSE-14 Datasheet

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LTC2356CMSE-14

Manufacturer Part Number
LTC2356CMSE-14
Description
Manufacturer
Linear Technology Corporation
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC2356CMSE-14
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC2356CMSE-14#PBF
Manufacturer:
LT
Quantity:
793
FEATURES
APPLICATIO S
BLOCK DIAGRA
10µF
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 (13µW) 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
A
A
IN
IN
+
1
2
3
4
LTC2356-14
V
GND
REF
+
5
S & H
6
U
REFERENCE
2.5V
W
14-BIT ADC
11
10µF
EXPOSED PAD
3.3V
7
V
DD
14
Sampling ADCs with Shutdown
OUTPUT
THREE-
SERIAL
TIMING
STATE
LOGIC
PORT
DESCRIPTIO
The LTC
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 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 A
A
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.
All other trademarks are the property of their respective owners.
Serial 12-Bit/14-Bit, 3.5Msps
IN
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
10
8
9
2356 BD
extends from ground to the supply voltage.
SDO
CONV
SCK
®
2356-12/LTC2356-14 are 12-bit/14-bit, 3.5Msps
LTC2356-12/LTC2356-14
U
–104
–50
–56
–62
–68
–80
–86
–92
–98
–74
THD, 2nd and 3rd vs Input Frequency
0.1
for Differential Input Signals
FREQUENCY (MHz)
1
THD
2nd
3rd
10
IN
2356 G02
+
100
and
1
2356f

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LTC2356CMSE-14 Summary of contents

Page 1

... LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 3.3V ...

Page 2

... 100MHz ORDER PART NUMBER LTC2356CMSE-12 10 CONV LTC2356IMSE-12 9 SCK LTC2356CMSE-14 8 SDO LTC2356IMSE-14 6 GND MSE PART MARKING = 150°C/ W LTCWN LTCWN LTCVF LTCVF http://www.linear.com/leadfree/ = 3.3V LTC2356-14 MAX MIN TYP MAX UNITS 14 ± ...

Page 3

ACCURACY otherwise specifications are 25°C with external reference = 2.55V DC. Differential signal drive with SYMBOL PARAMETER CONDITIONS SINAD Signal-to-Noise Plus 100kHz Input Signal ...

Page 4

LTC2356-12/LTC2356- POWER REQUIRE E TS range, otherwise specifications are at T SYMBOL PARAMETER V Supply Voltage DD I Supply Current DD P Power Dissipation CHARACTERISTICS range, otherwise specifications are at T SYMBOL ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS SINAD vs Input Frequency 0 FREQUENCY (MHz) SFDR vs Input Frequency 0.1 1 ...

Page 6

LTC2356-12/LTC2356- TYPICAL PERFOR A CE CHARACTERISTICS Differential Linearity vs Output Code 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 8192 4096 OUTPUT CODE Differential and Integral Linearity vs Conversion Rate MAX ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS PSRR vs Frequency –25 –30 –35 –40 –45 –50 –55 –60 –65 – 100 1k 10k FREQUENCY (Hz) Internal Reference Voltage vs V 2.4902 2.4900 2.4898 2.4896 2.4894 2.4892 2.4890 2.6 ...

Page 8

LTC2356-12/LTC2356- CTIO (Pin 1): Noninverting Analog Input fully differentially with respect to A 1.25V differential swing with respect common mode swing. DD – A (Pin 2): Inverting ...

Page 9

DIAGRA SCK t 4 CONV t 6 INTERNAL SAMPLE S/H STATUS t 8 Hi-Z SDO *BITS MARKED "X" AFTER D0 SHOULD BE IGNORED ...

Page 10

LTC2356-12/LTC2356- APPLICATIO S I FOR ATIO DRIVING THE ANALOG INPUT The differential analog inputs of the LTC2356-12/LTC2356-14 may be driven differentially single-ended input (i.e., the – A input is set Both differential ...

Page 11

U U APPLICATIO S I FOR ATIO INPUT FILTERING AND SOURCE IMPEDANCE The noise and the distortion of the input amplifier and other circuitry must be considered since they will add to the LTC2356-12/LTC2356-14 noise and distortion. The small-signal bandwidth ...

Page 12

LTC2356-12/LTC2356- APPLICATIO S I FOR ATIO Figure 3. The voltage of the external reference must be higher than the 2.5V output of the internal reference. The recommended range for an external reference is 2.55V ...

Page 13

U U APPLICATIO S I FOR ATIO 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 0 185k 371k 556k FREQUENCY (Hz) Figure 6b. LTC2356-12 6MHz Sine Wave 4096 Point FFT Plot with the LT1819 Driving ...

Page 14

LTC2356-12/LTC2356- APPLICATIO S I FOR ATIO internal reference. Note that, for slower conversion rates, the Nap and Sleep modes can be used for substantial reductions in power consumption. DIGITAL INTERFACE The LTC2356-12/LTC2356-14 has a 3-wire SPI-compatible (Serial Protocol ...

Page 15

... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... DACs LTC1592 16-Bit, Serial SoftSpan References LT1790-2.5 Micropower Series Reference in SOT-23 LT1461-2.5 Precision Voltage Reference LT1460-2.5 Micropower Series Voltage Reference SoftSpan is a trademark of Linear Technology Corporation. Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● NC7SVU04P5X 0.1µ ...

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