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LTC2337-18 fiches techniques PDF

Linear - Fully Differential Input ADC

Numéro de référence LTC2337-18
Description Fully Differential Input ADC
Fabricant Linear 
Logo Linear 





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LTC2337-18 fiche technique
Features
LTC2337-18
18-Bit, 500ksps, ±10.24V
True Bipolar, Fully Differential
Input ADC with 100dB SNR
Description
n 500ksps Throughput Rate
n ±4LSB INL (Max)
n Guaranteed 18-Bit No Missing Codes
n Fully Differential Inputs
n True Bipolar Input Ranges ±6.25V, ±10.24V, ±12.5V
n 100dB SNR (Typ) at fIN = 2kHz
n –115dB THD (Typ) at fIN = 2kHz
n Guaranteed Operation to 125°C
n Single 5V Supply
n Low Drift (20ppm/°C Max) 2.048V Internal Reference
n Onboard Single-Shot Capable Reference Buffer
n No Pipeline Delay, No Cycle Latency
n 1.8V to 5V I/O Voltages
n SPI-Compatible Serial I/O with Daisy-Chain Mode
n Internal Conversion Clock
n Power Dissipation 35mW (Typ)
n 16-Lead MSOP Package
Applications
n Programmable Logic Controllers
n Industrial Process Control
n High Speed Data Acquisition
n Portable or Compact Instrumentation
n ATE
The LTC®2337-18 is a low noise, high speed 18-bit succes-
siveapproximation register(SAR)ADCwithfullydifferential
inputs. Operating from a single 5V supply, the LTC2337-18
has a ±10.24V true bipolar input range, making it ideal for
high voltage applications which require a wide dynamic
range. The LTC2337-18 achieves ±4LSB INL maximum,
no missing codes at 18-bits with 100dB SNR.
The LTC2337-18 has an onboard single-shot capable
reference buffer and low drift (20ppm/°C max) 2.048V
temperature compensated reference. The LTC2337-18
also has a high speed SPI-compatible serial interface that
supports 1.8V, 2.5V, 3.3V and 5V logic while also featuring
a daisy-chain mode. The fast 500ksps throughput with
no cycle latency makes the LTC2337-18 ideally suited
for a wide variety of high speed applications. An internal
oscillator sets the conversion time, easing external timing
considerations. The LTC2337-18 dissipates only 35mW
and automatically naps between conversions, leading to
reduced power dissipation that scales with the sampling
rate. A sleep mode is also provided to reduce the power
consumption of the LTC2337-18 to 300μW for further
power savings during inactive periods.
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. Protected by U.S. Patents, including 7705765 and 7961132
Typical Application
+10.24V
–10.24V
+10.24V
–10.24V
+
5V
10µF
1.8V TO 5V
2.2µF
0.1µF
VDD
IN+
VDDLBYP OVDD
LTC2337-18
IN
RERFEBFUF
REFIN
GND
47µF
100nF
CHAIN
RDL/SDI
SDO
SCK
BUSY
CNV
233718 TA01
SAMPLE CLOCK
For more information www.linear.com/LTC2337-18
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
32k Point FFT fS = 500ksps,
fIN = 2kHz
SNR = 100.4dB
THD = –116dB
SINAD = 100.3dB
SFDR = –118dB
50 100 150 200 250
FREQUENCY (kHz)
233718 TA01b
233718f
1

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