LTC2391-16 Datasheet, PDF (1/24 Pages) Linear Technology – 16-Bit, 250ksps SAR ADC with 94dB SNR

Features
n _{250ksps Throughput Rate}
n _{±2LSB INL (Max)}
n _{Guaranteed 16-Bit No Missing Codes}
n _{94dB SNR (Typ) at fIN = 20kHz}
n _{Guaranteed Operation to 125°C}
n _{Single 5V Supply}
n _{1.8V to 5V I/O Voltages}
n _{95mW Power Dissipation}
n _{±4.096V Differential Input Range}
n _{Internal Reference (20ppm/°C Max)}
n _{No Pipeline Delay, No Cycle Latency}
n _{Parallel and Serial Interface}
n _{Internal Conversion Clock}
n _{48-Pin 7mm × 7mm LQFP and QFN Packages}
Applications
n _{Medical Imaging}
n _{High Speed Data Acquisition}
n _{Digital Signal Processing}
n _{Industrial Process Control}
n _{Instrumentation}
n _ATE
LTC2391-16
16-Bit, 250ksps SAR ADC
with 94dB SNR
Description
The LTC^®2391-16 is a low noise, high speed 16-bit suc-
cessive approximation register (SAR) ADC. Operating
from a single 5V supply, the LTC2391-16 supports a large
±4.096V fully differential input range, making it ideal for
high performance applications which require maximum
dynamic range. The LTC2391-16 achieves ±2LSB INL max,
no missing codes at 16-bits and 94dB SNR (typ).
The LTC2391-16 includes a precision internal reference
with a guaranteed 0.5% initial accuracy and a ±20ppm/°C
(max) temperature coefficient. Fast 250ksps throughput
with no cycle latency in both parallel and serial interface
modes makes the LTC2391-16 ideally suited for a wide
variety of high speed applications. An internal oscillator
sets the conversion time, easing external timing consider-
ations. The LTC2391-16 dissipates only 95mW at 250ksps,
while both nap and sleep power-down modes are provided
to further reduce power 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
ANALOG INPUT
0V TO 4.096V
249Ω
LT6350
2200pF
249Ω
SINGLE-ENDED-
TO-DIFFERENTIAL
DRIVER
5V
5V
1.8V TO 5V
10µF
0.1µF
10µF
0.1µF
4.7µF
AVP
IN⁺
DVP
OVP _PARALLEL
OR
SERIAL
16 BIT
INTERFACE
LTC2391-16
SER/PAR
BYTESWAP
IN^–
OB/2C
CS
RD
VCM REFIN REFOUT CNVST PD RESET GND OGND
BUSY
239116 TA01
10µF
1µF _{SAMPLE CLOCK}
16k Point FFT f_S = 250ksps,
f_IN = 20kHz
0
SNR = 94dB
–20
THD  –103dB
SINAD = 93.5dB
–40
SFDR = 104dB
–60
–80
–100
–120
–140
–160
–180
0
25
50
75
FREQUENCY (kHz)
100 125
239116 G08
239116f