FEATURES
nn 1.5Msps/Ch Throughput Rate
nn Eight Simultaneously Sampling Channels
nn Guaranteed 14-Bit, No Missing Codes
nn 8VP-P Differential Inputs with Wide Input
Common Mode Range
nn 81dB SNR (Typ) at fIN = 500kHz
nn –90dB THD (Typ) at fIN = 500kHz
nn Guaranteed Operation to 125°C
nn Single 3.3V or 5V Supply
nn Low Drift (20ppm/°C Max) 2.048V or 4.096V
Internal Reference
nn 1.8V to 2.5V I/O Voltages
nn CMOS or LVDS SPI-Compatible Serial I/O
nn Power Dissipation 20mW/Ch (Typ)
nn Small 52-Lead (7mm × 8mm) QFN Package
APPLICATIONS
nn High Speed Data Acquisition Systems
nn Communications
nn Optical Networking
nn Multiphase Motor Control
LTC2320-14
Octal, 14-Bit + Sign,
1.5Msps/Ch Simultaneous
Sampling ADC
DESCRIPTION
The LTC®2320-14 is a low noise, high speed octal 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 LTC2320-
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 LTC2320-14 achieves
±1LSB INL typical, no missing codes at 14 bits and 81dB
SNR.
The LTC2320-14 has an onboard low drift (20ppm/°C
max) 2.048V or 4.096V temperature-compensated
reference. The LTC2320-14 also has a high speed SPI-
compatible serial interface that supports CMOS or LVDS.
The fast 1.5Msps per channel throughput with no latency
makes the LTC2320-14 ideally suited for a wide variety
of high speed applications. The LTC2320-14 dissipates
only 20mW per channel and offers nap and sleep modes
to reduce the power consumption to 26μW for further
power savings during inactive periods.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
10µF
3.3V OR 5V
1µF
1.8V TO 2.5V
TRUE DIFFERENTIAL INPUTS
NO CONFIGURATION REQUIRED
IN+, IN–
ARBITRARY
DIFFERENTIAL
VDD
VDD
0V
0V
BIPOLAR
VDD
UNIPOLAR
VDD
0V
0V
EIGHT SIMULTANEOUS
SAMPLING CHANNELS
AAIINN11+– S/H
VDD GND
14-BIT
MUX + SIGN
AAIINN22+– S/H
SAR ADC
GND OVDD
CMOS/LVDS
SDR/DDR
REFBUFEN
AAIINN33+– S/H
AAIINN44+– S/H
AAIINN55+– S/H
AAIINN66–+ S/H
14-BIT
MUX + SIGN
SAR ADC
LTC2320-14
14-BIT
MUX + SIGN
SAR ADC
SDO1
SDO2
SDO3
SDO4
SDO5
SDO6
SDO7
SDO8
CLKOUT
SCK
CNV
AAIINN77+– S/H
AAIINN88+– S/H
MUX
14-BIT
+ SIGN
SAR ADC
REF REFOUT1 REFOUT2 REFOUT3 REFOUT4
232014 TA01a
1µF
10µF 10µF
10µF 10µF
SAMPLE
CLOCK
For more information www.linear.com/LTC2320-14
32k Point FFT fSMPL = 1.5Msps,
fIN = S5M0P0LkHz
IN
0 SNR = 81.1dB
THD = –90.2dB
–20 SINAD = 80.8dB
SFDR = 94.7dB
–40
–60
–80
–100
–120
–140
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7
FREQUENCY (MHz)
232014 TA01b
232014fa
1
