LTC2328-16_15 Datasheet, PDF (1/26 Pages) Linear Technology – True Bipolar, Pseudo-Differential Input ADC with 93.5dB SNR

LTC2328-16
16-Bit, 1Msps, ±10.24V
True Bipolar, Pseudo-Differential
Input ADC with 93.5dB SNR
FEATURES
DESCRIPTION
n _{1Msps Throughput Rate}
n _{±1.5LSB INL (Max)}
n _{Guaranteed 16-Bit No Missing Codes}
n _{Pseudo-Differential Inputs}
n _{True Bipolar Input Ranges ±6.25V, ±10.24V, ±12.5V}
n _{93.5dB SNR (Typ) at fIN = 2kHz}
n _{–111dB 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 50mW (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^®2328-16 is a low noise, high speed 16-bit suc-
cessive approximation register (SAR) ADC with pseudo-
differential inputs. Operating from a single 5V supply, the
LTC2328-16 has a ±10.24V true bipolar input range, making
it ideal for high voltage applications which require a wide
dynamic range. The LTC2328-16 achieves ±1.5LSB INL
maximum, no missing codes at 16 bits with 93.5dB SNR.
The LTC2328-16 has an onboard single-shot capable
reference buffer and low drift (20ppm/°C max) 2.048V
temperature compensated reference. The LTC2328-16
also has a high speed SPI-compatible serial interface that
supports 1.8V, 2.5V, 3.3V and 5V logic while also featur-
ing a daisy-chain mode. The fast 1Msps throughput with
no cycle latency makes the LTC2328-16 ideally suited
for a wide variety of high speed applications. An internal
oscillator sets the conversion time, easing external timing
considerations. The LTC2328-16 dissipates only 50mW
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 LTC2328-16 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, 7961132.
TYPICAL APPLICATION
+10.24V
–10.24V
+
LT^®1468
–
5V
10µF
1.8V TO 5V
2.2µF
0.1µF
V_DD
IN⁺
V_DDLBYP OV_DD
LTC2328-16
IN^–
RERFEBFUF
REFIN GND
47µF
100nF
CHAIN
RDL/SDI
SDO
SCK
BUSY
CNV
232816 TA01a
SAMPLE CLOCK
For more information www.linear.com/LTC2328-16
32k Point FFT f_S = 1Msps,
f_IN = 2kHz
0
SNR = 93.5dB
–20
THD = –111dB
SINAD = 93.4dB
–40
SFDR = –115dB
–60
–80
–100
–120
–140
–160
–180
0
100 200 300 400 500
FREQUENCY (kHz)
232816 TA01b
232816fa
1