LTC2368-16_15 Datasheet, PDF (1/24 Pages) Linear Technology – 16-Bit, 1Msps, Pseudo- Differential Unipolar SAR ADC with 94.7dB SNR

FEATURES
n _{1Msps Throughput Rate}
n _{±0.75LSB INL (Max)}
n _{Guaranteed 16-Bit No Missing Codes}
n _{Low Power: 13.5mW at 1Msps, 13.5µW at 1ksps}
n _{94.7dB SNR (Typ) at fIN = 2kHz}
n _{–118dB THD (Typ) at fIN = 2kHz}
n _{Guaranteed Operation to 125°C}
n _{2.5V Supply}
n _{Pseudo-Differential Unipolar Input Range: 0V to VREF}
n _{VREF Input Range from 2.5V to 5.1V}
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 _{16-Lead MSOP and 4mm × 3mm DFN Packages}
APPLICATIONS
n _{Medical Imaging}
n _{High Speed Data Acquisition}
n _{Portable or Compact Instrumentation}
n _{Industrial Process Control}
n _{Low Power Battery-Operated Instrumentation}
n _ATE
LTC2368-16
16-Bit, 1Msps, Pseudo-
Differential Unipolar SAR
ADC with 94.7dB SNR
DESCRIPTION
The LTC^®2368-16 is a low noise, low power, high speed
16-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2368-16 has a 0V
to V_REF pseudo-differential unipolar input range with V_REF
ranging from 2.5V to 5.1V. The LTC2368-16 consumes
only 13.5mW and achieves ±0.75LSB INL maximum, no
missing codes at 16 bits with 94.7dB SNR.
The LTC2368-16 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 2Msps
throughput with no cycle latency makes the LTC2368-16
ideally suited for a wide variety of high speed applications.
An internal oscillator sets the conversion time, easing exter-
nal timing considerations. The LTC2368-16 automatically
powers down between conversions, leading to reduced
power dissipation that scales with the sampling rate.
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.
TYPICAL APPLICATION
2.5V 1.8V TO 5V
V_REF
0V
+
LT^®6202
–
10µF
0.1µF
10Ω
V_DD
OV_DD
CHAIN
IN⁺
RDL/SDI
10nF
LTC2368-16
IN^–
SDO
SCK
BUSY
REF
GND
CNV
2.5V TO 5.1V
236816 TA01a
47µF
(X5R, 0805 SIZE)
SAMPLE CLOCK
32k Point FFT f_S = 1Msps, f_IN = 2kHz
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
SNR = 94.7dB
THD = –118dB
SINAD = 94.7dB
SFDR = 119dB
100 200 300 400 500
FREQUENCY (kHz)
236816 TA01b
236816f
1