LTC2323-12_15 Datasheet, PDF (1/24 Pages) Linear Technology – Dual, 12-Bit + Sign, 5Msps Differential Input ADC with Wide Input Common Mode Range

LTC2323-12
Features
Dual, 12-Bit + Sign, 5Msps
Differential Input ADC with Wide
Input Common Mode Range
Description
n _{5Msps Throughput Rate}
n _{±0.5LSB INL (Typ)}
n _{Guaranteed 12-Bit, No Missing Codes}
n _{8VP-P Differential Inputs with Wide Input Common}
Mode Range
n _{73dB SNR (Typ) at fIN = 2MHz}
n _{–85dB THD (Typ) at fIN = 2MHz}
n _{Guaranteed Operation to 125°C}
n _{Single 3.3V or 5V Supply}
n _{Low Drift (20ppm/°C Max) 2.048V or 4.096V Internal}
Reference
n _{1.8V to 2.5V I/O Voltages}
n _{CMOS or LVDS SPI-Compatible Serial I/O}
n _{Power Dissipation 38mW/Ch (Typ)}
n _{Small 28-Lead (4mm × 5mm) QFN Package}
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^®2323-12 is a low noise, high speed dual
12-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 LTC2323-12 has an 8V_P-P differential input range,
making it ideal for applications which require a wide
dynamic range with high common mode rejection. The
LTC2323-12 achieves ±0.5LSB INL typical, no missing
codes at 12 bits and 73dB SNR.
The LTC2323-12 has an onboard low drift (20ppm/°C max)
2.048V or 4.096V temperature-compensated reference.
The LTC2323-12 also has a high speed SPI-compatible
serial interface that supports CMOS or LVDS. The fast
5Msps per channel throughput with one-cycle latency
makes the LTC2323-12 ideally suited for a wide variety of
high speed applications. The LTC2323-12 dissipates only
38mW per channel and offers nap and sleep modes to
reduce the power consumption to 5μW for further power
savings during inactive periods.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
DIFFERENTIAL INPUTS
NO CONFIGURATION REQUIRED
IN⁺, IN^–
3.3V OR 5V
10µF
INSTRUMENTATION
DIFFERENTIAL
25Ω
0V
0V
BIPOLAR
UNIPOLAR
25Ω
0V
0V
A_IN1+
220pF
V_DD REFOUT1
VBYP1
LTC2323-12
REFOUT2
VBYP2
A_IN1–
A_IN2+
A_IN2–
V_DD
CMOS/LVDS
REFINT
GND
SDO1
SDO2
CLKOUT
SCK
CNV
OGND OV_DD
10µF
1µF
10µF
1µF
TO CONTROL
LOGIC
(FPGA, CPLD,
DSP, ETC.)
1.8V TO 2.5V
1µF
232312 TA01a
16k Point FFT f_S = 5Msps, f_IN = 2.2MHz
0
SNR = 73dBFS
THD = –86dB
–20 SINAD = 72.8dB
SFDR = 88dB
–40
–60
–80
–100
–120
0
0.5
1
1.5
2
2.5
FREQUENCY (MHz)
232312 TA01b
For more information www.linear.com/LTC2323-12
232312f
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