LTC2311-14
FEATURES
14-Bit + Sign, 5Msps
Differential Input ADC with Wide
Input Common Mode Range
DESCRIPTION
n 5Msps Throughput Rate
n ±0.75LSB INL (Typ), ±2LSB INL Guaranteed
n Guaranteed 14-Bit, No Missing Codes
n 8VP-P Differential Inputs with Wide Input Common
Mode Range
n 80dB SNR (Typ) at fIN = 2.2MHz
n –90dB THD (Typ) at fIN = 2.2MHz
n Guaranteed Operation –40°C to 125°C
n Single 3.3V or 5V Supply
n Low Drift (20ppm/°C Max) 2.048V or 4.096V Internal
Reference with 1.25V External Reference Input
n 1.8V to 2.5V I/O Voltages
n CMOS or LVDS SPI-Compatible Serial I/O
n Power Dissipation 50mW at VDD = 5V (Typ)
n Small 16-Lead (4mm × 5mm) MSOP Package
n AEC-Q100 Qualified for Automotive Applications
APPLICATIONS
n High Speed Data Acquisition Systems
n Communications
n Remote Data Acquisition
n Imaging
n Optical Networking
n Automotive
n Multiphase Motor Control
The LTC®2311-14 is a low noise, high speed 14-bit +
sign successive approximation register (SAR) ADC with
differential inputs and wide input common mode range.
Operating from a single 3.3V or 5V supply, the LTC2311-
14 has an 8VP-P differential input range, making it ideal
for applications which require a wide dynamic range with
high common mode rejection. The LTC2311-14 achieves
±0.75LSB INL typical, no missing codes at 14 bits and
80dB SNR typical.
The LTC2311-14 has an onboard low drift (20ppm/°C max)
2.048V or 4.096V temperature compensated reference and
provides an external 1.25V buffered reference input. The
LTC2311-14 also has a high speed SPI-compatible serial
interface that supports CMOS or LVDS. The fast 5Msps
throughput with one-cycle latency makes the LTC2311-14
ideally suited for a wide variety of high speed applications.
The LTC2311-14 dissipates only 50mW with a 5V supply
and offers nap and sleep modes to reduce the power
consumption to 5μW for further power savings during
inactive periods.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
DIFFERENTIAL INPUTS
NO CONFIGURATION REQUIRED
IN+, IN–
3.3V OR 5V
1µF
ARBITRARY
0V
DIFFERENTIAL
25Ω
0V
VDD REFOUT
AIN+
LTC2311-14
47pF
REFIN
BIPOLAR
UNIPOLAR
25Ω
0V
0V
AIN–
CMOS/LVDS
GND
SDO
SCK
CNV
OVDD
10µF
10µF
LVDS OR CMOS
CONFIGURABLE
I/O
1.8V TO 2.5V
1µF
231114 TA01a
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32k Point FFT fSMPL = 5Msps, fIN = 2.2MHz
0
SNR = 80.6dB
–20
THD = –90dB
SINAD = 80.1dB
SFDR = 96dB
–40
–60
–80
–100
–120
–140
0
0.5
1
1.5
FREQUENCY (MHz)
2
2.5
231114 TA01b
Rev. B
1
